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WO2024224823A1 - Moteur - Google Patents

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Publication number
WO2024224823A1
WO2024224823A1 PCT/JP2024/008743 JP2024008743W WO2024224823A1 WO 2024224823 A1 WO2024224823 A1 WO 2024224823A1 JP 2024008743 W JP2024008743 W JP 2024008743W WO 2024224823 A1 WO2024224823 A1 WO 2024224823A1
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WO
WIPO (PCT)
Prior art keywords
wire
slot
wires
crossover
extension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/008743
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English (en)
Japanese (ja)
Inventor
諒 高田
章吾 谷野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of WO2024224823A1 publication Critical patent/WO2024224823A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors

Definitions

  • the present invention relates to a motor that includes a stator and a rotor in which conductors that form coils are arranged.
  • a known configuration for the stator winding of a motor is one in which three phase windings (U-phase, V-phase, and W-phase) each have two parallel windings electrically connected in parallel, and each phase winding is connected in a star configuration.
  • Patent Document 1 JP 2018-011491 A discloses a motor having a stator core (20) with a plurality of slots (21) arranged in the circumferential direction at a ratio of two per pole per phase, and a stator conductor (30) with three-phase windings (31U, 31V, 31W) wound in the slots. Each phase winding is formed by connecting parallel windings (U1, U2, V1, V2, W1, W2) for each phase in parallel.
  • each parallel winding of each phase has a power line partial winding (C1) connected to the power supply side, a neutral line partial winding (C2) connected to the neutral point, and at least one of a 5-pitch jumper wire (61, 63) that crosses at 5 slot pitches in the circumferential direction and a 7-pitch jumper wire (62) that crosses at 7 slot pitches.
  • the start and end of the parallel windings for each phase are located on either the innermost or outermost slot layer.
  • the lead wires and neutral wires connected to the power supply are located on either the innermost or outermost slot layer.
  • a neutral wire is connected to the conductor that forms the stator coil.
  • the neutral wire is often arranged on the axial outside of the stator core.
  • This application discloses a motor that can efficiently arrange the neutral wire and crossover wire on the axial outside of the stator core.
  • a motor includes a stator and a rotor rotatably provided inside the stator.
  • the stator includes a stator core having a plurality of slots arranged in a circumferential direction, and a conductor including slot wires inserted into each of the slots in a state where N layers are arranged in the radial direction, and extension wires extending from the slot wires to the outside of the slots.
  • a plurality of coils are formed by the conductor.
  • the conductor forming each of the plurality of coils includes a winding portion in which slot wires inserted into the plurality of slots at intervals based on the number of slots per pole SN are connected in series by extension wires and wind around the outer periphery of the rotor, and a crossover wire connecting the slot wires of the outermost layer (Nth layer) of the winding portion to the slot wires of the innermost layer (first layer) of slots.
  • the neutral wire of each of the plurality of coils is connected by welding to an extension line of a slot wire in a layer other than the outermost layer and the innermost layer at one axial end side of the stator core.
  • the crossover wires of each of the plurality of coils are connected by welding to an extension wire of the outermost layer of slot wires and an extension wire of the innermost layer of slot wires at one axial end side of the stator core.
  • the crossover wire of each of the plurality of coils has a crossover wire outer circumferential portion extending in a circumferential direction radially outside an extension line of the winding portion. Outer peripheries of at least two of the plurality of crossover wires are arranged to overlap when viewed in the axial direction.
  • the neutral conductor has a neutral conductor outer peripheral portion extending in a circumferential direction radially outside the extension line of the winding portion. The neutral conductor outer periphery is arranged so as to overlap at least a portion of the crossover periphery of the at least two crossover wires when viewed in a radial direction.
  • FIG. 1 is a cross-sectional view showing an example of the configuration of a motor according to this embodiment.
  • FIG. 2 is a perspective view of the stator 10 shown in FIG.
  • FIG. 3 is a perspective view of the area around region III in FIG. 2 as seen from a different direction.
  • FIG. 4 shows an example of a conductor element forming part of the conductor 2 shown in FIGS.
  • FIG. 5 is a circuit diagram showing an example of a coil formed by the conductor wire of the stator.
  • FIG. 6 is a diagram showing an example of the arrangement of slot lines of three-phase coils arranged in the slots of the stator 10.
  • FIG. 7 is a diagram showing an example of wiring in the stator of the first coil of the U phase shown in FIG. FIG.
  • FIG. 8 is a diagram showing an example of wiring in the stator of the second coil of the U phase shown in FIG.
  • FIG. 9 is a diagram showing an example of wiring in the stator of the U-phase third coil shown in FIG.
  • FIG. 10 is a diagram showing an example of wiring in the stator of the fourth coil of the U phase shown in FIG.
  • FIG. 11 is a view of the stator 10 shown in FIGS. 1 and 2 as viewed from the other axial end side.
  • FIG. 12 is a diagram showing an example of the start points and end points of the four coils of each of the U-phase, V-phase, and W-phase, and the wiring of the crossover wires.
  • FIG. 13 is a view of the stator 10 shown in FIGS. 1 and 2 as viewed from one axial end side.
  • FIG. 14 is a perspective view showing only the crossover wire in FIG.
  • FIG. 15 is an enlarged view of a portion of FIG.
  • FIG. 16 is a perspective view of the portion shown in FIG.
  • the inventors have considered a configuration in which the neutral wire is connected by welding to the extension wire of the slot wire in an intermediate layer other than the outermost and innermost layers of the slots of the stator core.
  • efficient wiring is possible by providing a crossover wire that connects the slot wire in the outermost layer with the slot wire in the innermost layer.
  • the inventors have focused on the relationship between this crossover wire and the neutral wire and considered how to arrange them efficiently. As a result of their consideration, they have found that the neutral wire and crossover wire can be arranged efficiently in the space axially outside the stator by drawing out and arranging the crossover wire radially outward from the extension wire group extending from a group of some of the slot wires of the neutral wire.
  • a motor includes a stator and a rotor rotatably provided inside the stator.
  • the stator includes a stator core having a plurality of slots arranged in a circumferential direction, and a conductor including slot wires inserted into each of the slots in a state where N layers are arranged in the radial direction, and extension wires extending from the slot wires to the outside of the slots.
  • a plurality of coils are formed by the conductor.
  • the conductor forming each of the plurality of coils includes a winding portion in which slot wires inserted into the plurality of slots at intervals based on the number of slots per pole SN are connected in series by extension wires and wind around the outer periphery of the rotor, and a crossover wire connecting the slot wires of the outermost layer (Nth layer) of the winding portion to the slot wires of the innermost layer (first layer) of slots.
  • the neutral wire of each of the plurality of coils is connected by welding to an extension line of a slot wire in a layer other than the outermost layer and the innermost layer at one axial end side of the stator core.
  • the crossover wires of each of the plurality of coils are connected by welding to an extension wire of the outermost layer of slot wires and an extension wire of the innermost layer of slot wires at one axial end side of the stator core.
  • the crossover wire of each of the plurality of coils has a crossover wire outer circumferential portion extending in a circumferential direction radially outside an extension line of the winding portion. Outer peripheries of at least two of the plurality of crossover wires are arranged to overlap when viewed in the axial direction.
  • the neutral conductor has a neutral conductor outer peripheral portion extending in a circumferential direction radially outside the extension line of the winding portion. The neutral conductor outer periphery is arranged so as to overlap at least a portion of the crossover periphery of the at least two crossover wires when viewed in a radial direction.
  • the outer circumferential portions of the neutral wire and the multiple crossover wires are pulled out radially outside the winding portion and extend in the circumferential direction. At least two crossover wire outer circumferential portions overlap when viewed from the axial direction. Furthermore, the outer circumferential portion of the neutral wire overlaps at least a portion of the outer circumferential portions of the crossover wires of at least two crossover wires when viewed from the radial direction. This allows the circumferentially extending portions of the neutral wire and the multiple crossover wires to be arranged together radially outside the winding portion. Therefore, the neutral wire and the crossover wires can be arranged efficiently on the axially outside of the stator core.
  • a configuration in which two or more crossover wire outer peripheries overlap when viewed in the axial direction is a configuration in which there is an axial virtual line passing through two or more crossover wire outer peripheries.
  • this configuration at least a portion of each of the two or more crossover wire outer peripheries overlaps with at least a portion of the other crossover wire outer peripheries when viewed in the axial direction.
  • two or more crossover wire outer peripheries are lined up in the axial direction.
  • a configuration in which at least a portion of the neutral wire outer periphery and the crossover wire outer periphery overlap when viewed in the radial direction is a configuration in which there is a radial virtual line passing through the neutral wire outer periphery and the crossover wire outer periphery.
  • at least a portion of the neutral wire outer periphery overlaps with at least a portion of the crossover wire outer periphery when viewed in the radial direction.
  • the radially outer side of the extension line of the circumferential portion is the space that is radially outer than the extension line of the circumferential portion and overlaps with the circumferential portion when viewed from the radial direction.
  • the radially outer side (or radially inner side) of a certain component means the space that is radially outer (or radially inner) than that component and overlaps with that component when viewed from the radial direction.
  • the space radially outer than a certain component includes both spaces that overlap with that component when viewed from the radial direction and spaces that do not overlap.
  • the radially outer side is the direction away from the center of the diameter, i.e. the center of rotation of the motor, and the radially inner side is the direction toward the center of the diameter.
  • the axially outer side of the stator core is the space that is axially outer than the stator core and overlaps with the stator core when viewed from the axial direction.
  • the axially outer side (or axially inner side) of a certain component means the space that is axially outer than (or axially inner than) that component and overlaps with that component when viewed from the axial direction.
  • the space axially outer than a certain component includes both spaces that overlap with that component when viewed from the axial direction and spaces that do not overlap.
  • the axially outer side is the direction away from the axial center of the stator core, and the axially inner side is the direction toward the axial center of the stator core.
  • the neutral conductor outer periphery may be disposed radially outward from the outer periphery of the crossover wires of the plurality of crossover wires. This makes it easy to connect the neutral conductor after connecting the plurality of crossover wires, thereby simplifying the manufacturing process of the motor.
  • the neutral conductor outer peripheral portion and the crossover conductor outer peripheral portions of the plurality of crossover conductors may be disposed inside the outer peripheral edge of the stator core as viewed in the axial direction.
  • the neutral conductor and the plurality of crossover conductors are disposed so as not to protrude radially outward from the stator core. This allows them to be disposed more efficiently.
  • the lead wires of each of the plurality of coils may be connected by welding to an extension line of a slot wire of a layer other than the outermost layer and the innermost layer at one axial end side of the stator core.
  • the lead wires may be arranged axially outward from the extension line of the winding portion.
  • the lead wires are mainly arranged axially outward from the winding portion, and the neutral wire and the crossover wire are mainly arranged radially outward from the winding portion. This improves the degree of freedom in arranging the lead wires.
  • the arrangement efficiency of the lead wires, neutral wires, and crossover wires can be further improved.
  • the at least two crossover wires may include an SN-1 crossover wire connecting conductors (slot wires) inserted into slots at SN-1 slot intervals, and an SN+1 crossover wire connecting conductors (slot wires) inserted into slots at SN+1 slot intervals.
  • An outer periphery of the crossover wire of the SN+1 crossover wire may be disposed closer to the stator core than an outer periphery of the crossover wire of the SN-1 crossover wire. This allows the crossover wire connecting the conductors (slot wires) at SN+1 slot intervals to be disposed so as to run around the outside of the crossover wire connecting the conductors (slot wires) at SN-1 slot intervals. This allows the multiple crossover wires to be disposed more efficiently.
  • each jumper wire may be welded to a radially outer surface of an extension line of the slot wire in the innermost layer, and the other end of each jumper wire may be welded to a radially outer surface of an extension line of the slot wire in the outermost layer.
  • each of the multiple jumper wires may be formed so that it extends axially inward from the welded portion with the extension line of the innermost slot wire, then curves and extends radially outward, reaching the outer periphery of the jumper wire. This allows the jumper wire to be pulled out radially outward from the winding portion while limiting the axial extension range of the jumper wire.
  • each of the plurality of crossover wires may be welded to a portion of the extension of the slot wire of the innermost layer, which is radially inward from the innermost layer of the slot. This allows the crossover wire to have a gentle curve. This makes it easier to install the crossover wires, and improves durability after installation.
  • a circumferential weld may be disposed at one axial end of the stator core, which is a weld that connects the extension wires of the slot wires inserted at the slot pitch based on the SN in the winding portion.
  • An innermost layer jumper weld that is a weld between each of the multiple jumper wires and the innermost layer slot wire, and a neutral wire weld that is a weld between the neutral wire and the extension wire may be disposed axially outside of the circumferential weld at one axial end of the stator core. This makes it easy to weld the extension wire of the winding portion at the axial outside of the stator core, and then weld the jumper wire and neutral wire. This makes it easy to attach the jumper wire and neutral wire, and allows them to be disposed efficiently.
  • the welds between one ends of at least two crossover wires with overlapping outer peripheries of the crossover wires and the extension wires, and the neutral wire welds between the neutral wire and the extension wires may be arranged side by side in the radial direction. This allows the crossover wire welds and the neutral wire welds to be arranged in a concentrated manner. This further increases the arrangement efficiency of the neutral wires and crossover wires.
  • the welds between one ends of at least two crossover wires whose outer peripheries overlap and the extension wires, and the welds between the draw-out wires and the extension wires may be arranged side by side in the radial direction. This allows the welds of the crossover wires and the welds of the draw-out wires to be arranged in a concentrated manner. This further increases the arrangement efficiency of the draw-out wires and crossover wires.
  • the welds between one ends of at least two jumper wires whose outer peripheries overlap the extension wires may be arranged radially next to the neutral wire welds, and the welds between the other ends of the at least two jumper wires and the extension wires may be arranged radially next to the draw-out wire welds. This can further increase the efficiency of the arrangement of the neutral wires, draw-out wires, and jumper wires.
  • an outermost layer jumper wire weld which is a weld between one of the at least two jumper wires whose outer peripheries overlap and the extension wire of the outermost layer slot wire
  • an innermost layer jumper wire weld which is a weld between the other of the at least two jumper wires and the extension wire of the innermost layer slot wire, and the neutral wire weld
  • the neutral wire weld may include first and second neutral wire welds respectively connected to the extension wires of the slot wires inserted into two circumferentially adjacent slots.
  • the first neutral wire weld may be aligned radially with the weld between one end of one of the at least two jumper wires and the extension wire
  • the second neutral wire weld may be aligned radially with the weld between one end of the other of the at least two jumper wires and the extension wire. This can further increase the arrangement efficiency of the neutral wires and the jumper wires.
  • the draw-out wire welds may include first and second draw-out wire welds respectively connected to extension wires of slot wires inserted into two circumferentially adjacent slots.
  • the first draw-out wire welds may be aligned radially with the weld between one end of one of the at least two jumper wires and the extension wire, and the second draw-out wire welds may be aligned radially with the weld between one end of the other of the at least two jumper wires and the extension wire. This can further increase the arrangement efficiency of the draw-out wires and jumper wires.
  • the extension wire connected to the jumper wire by welding may extend from the slot wire in one circumferential direction.
  • the extension wire connected to the neutral wire weld and the drawer wire weld by welding may extend from the slot wire in the opposite circumferential direction. This allows the jumper wire weld and the neutral wire weld or the drawer wire weld to be arranged side by side in the radial direction even if the slot of the slot wire to which the jumper wire is connected via the extension wire is different from the slot of the slot wire to which the neutral wire or the drawer wire is connected via the extension wire.
  • the conductor may form three-phase coils of U, V, and W phases.
  • Each of the three phases may include multiple coils connected in parallel.
  • the outer periphery of the jumper wires of the multiple coils of each phase may be arranged to overlap when viewed from the axial direction. This allows the jumper wires of the multiple coils of each of the three phases and the neutral wires of each phase to be arranged in a concentrated manner. This can further increase the arrangement efficiency of the neutral wires and jumper wires of the three-phase coils.
  • the welds between one end of each of the jumper wires of the multiple coils of each phase and the extension wires may be arranged radially side by side with the neutral wire welds, and the welds between the other end of each of the jumper wires of the multiple coils of each phase and the extension wires may be arranged radially side by side with the lead wire welds. This can further increase the arrangement efficiency of the neutral wires, lead wires, and jumper wires of the three-phase coils.
  • the neutral conductor outer periphery may be arranged so as to overlap, as viewed radially, with the entire outer periphery of the jumper wires of the multiple coils of at least one of the three phases. This can further increase the arrangement efficiency of the neutral conductors and jumper wires of the three-phase coils.
  • each of the three phases may include four coils connected in parallel.
  • the outer periphery of the jumper wires of the four coils of each phase may be arranged to overlap when viewed from the axial direction. This can further increase the arrangement efficiency of the neutral wires and jumper wires of the four parallel coils of the three phases.
  • Each of the jumper wires of the first and second coils of the four coils of each phase may connect slot wires inserted into two slots with an SN+1 slot pitch.
  • Each of the jumper wires of the third and fourth coils of the four coils may connect slot wires inserted into two slots with an SN-1 slot pitch.
  • the entire neutral wire may be positioned so that it does not protrude axially outward beyond the weld between the neutral wire and the extension wire. This allows the axial extension range of the neutral wire to be reduced.
  • the neutral wire may be formed so that it extends axially inward from the neutral wire welded portion, then curves and extends radially outward, reaching the outer periphery of the neutral wire. This allows the neutral wire to be pulled out radially outward from the winding portion while limiting the axial extension range of the neutral wire.
  • the neutral wire may be connected by welding to the extension wires of the slot wires of the pth and p+1th layers, which are layers other than the outermost and innermost layers of the same slot.
  • p is an integer, and 2 ⁇ p ⁇ N-1.
  • An innermost layer jumper wire weld between one of the at least two jumper wires with which the outer periphery of the jumper wire overlaps and the extension wire of the slot wire of the innermost layer, an outermost layer jumper wire weld between the other of the at least two jumper wires and the extension wire of the slot wire of the outermost layer, and a weld between the extension wires of the slot wires of the pth and p+1th layers and the neutral wire may be arranged side by side in the radial direction.
  • the outer periphery of the jumper wires of the at least two jumper wires are arranged to overlap when viewed from the axial direction. This can further increase the arrangement efficiency of the neutral wire and the jumper wire.
  • the pull-out wire may be connected by welding to the extension wire of the slot wire in the pth and p+1th layers, which are layers other than the outermost and innermost layers of the same slot.
  • An innermost layer jumper wire weld between one of the at least two jumper wires with the overlapping outer periphery of the jumper wire and the extension wire of the slot wire in the innermost layer, an outermost layer jumper wire weld between the other of the at least two jumper wires and the extension wire of the slot wire in the outermost layer, and a weld between the pull-out wire and the extension wire of the slot wire in the pth and p+1th layers may be arranged side by side in the radial direction.
  • the outer periphery of the jumper wires of the at least two jumper wires are arranged to overlap when viewed from the axial direction. This can further increase the arrangement efficiency of the pull-out wires and the jumper wires.
  • each of the multiple jumper wires may have a jumper wire connection portion that connects between the welded portion with the extension wire of the innermost layer of slot wire and the outer periphery of the jumper wire.
  • the jumper wire connection portion may be formed, for example, so as to extend axially inward from the welded portion with the extension portion, then curve and extend radially outward. This allows the jumper wire to be pulled out radially outward efficiently.
  • the neutral conductor may have a neutral conductor connection portion that connects between the welded portion with the extension conductor and the outer periphery of the neutral conductor.
  • the neutral conductor connection portion may be formed, for example, so as to extend axially inward from the welded portion with the extension conductor, then bend and extend radially outward. This allows the neutral conductor to be efficiently pulled out radially outward.
  • the neutral conductor connection portion may be provided for each coil of each of the three phases. In this case, the neutral conductor connection portion of each coil may be connected to one outer periphery of the neutral conductor.
  • At least one of the outermost layer jumper wire welds or the innermost layer jumper wire welds may be collectively referred to as a "jumper wire weld.”
  • a "jumper wire weld” When two or more welds are arranged side by side in the radial direction, the two welds overlap an imaginary line extending in the radial direction when viewed from the axial direction.
  • FIG. 1 is a cross-sectional view showing an example of the configuration of a motor 100 in this embodiment.
  • the motor 100 includes a stator 10 and a rotor 20.
  • the rotor 20 is rotatably supported inside the stator 10.
  • the stator 10 and the rotor 20 are arranged coaxially.
  • the axial direction of the stator 10 is the same as the direction of the rotation axis of the rotor 20.
  • the stator 10 and the rotor 20 are housed in a housing 30.
  • the housing 30 includes a first cover 31, a housing body 32, and a second cover 33.
  • the housing body 32 is formed in a cylindrical shape surrounding the outer periphery of the stator 10 and supports the outer periphery of the stator 10.
  • the first cover 31 is attached to one axial end side of the housing body 32.
  • the first cover 31 covers one axial end side of the stator 10 and the rotor 20.
  • the first cover 31 supports the rotor 20 via a bearing 31a.
  • the second cover 33 is attached to the other axial end side of the housing body 32.
  • the second cover 33 covers the other axial end side of the stator 10 and the rotor 20.
  • the second cover 33 supports the rotor 20 via a bearing 33a.
  • the first cover 31, the housing body 32, and the second cover 33 are each formed of a separate member, but either the first cover 31 and the housing body 32 or the second cover 33 and the housing body 32 may be integrally formed, i.e., from a single member.
  • the stator 10 has a stator core 1 and a conductor 2.
  • the stator core 1 has a number of slots arranged in the circumferential direction.
  • the conductor 2 includes a number of slot wires inserted into each of the slots, and an extension wire extending from the slot wire to the outside of the slot.
  • the conductor 2 forms three-phase coils, U-phase, V-phase, and W-phase.
  • FIG. 2 is a perspective view of the stator 10 shown in FIG. 1.
  • the extension wire 2e of the conductor 2 of the stator 10 extends to the coil end portions E1, E2 at both axial ends of the stator core 1. That is, the conductor 2 includes an extension wire 2e at one axial end side J1 and an extension wire 2e at the other axial end side J2.
  • the lead wire 5, neutral wire 4, and jumper wire 2B are connected by welding to the extension wire 2e at one axial end side J1.
  • One end of the jumper wire is connected by welding to the extension wire of the slot wire of the outermost layer, and the other end is connected by welding to the extension wire of the slot wire of the innermost layer.
  • the conductor 2 forming each coil of each of the three phases includes a winding portion that winds around the outer periphery of the rotor 20, and a jumper wire 2B.
  • a group of multiple slot wires 2s inserted into slots at a predetermined pitch are connected in series by an extension wire 2e.
  • the predetermined pitch may be, for example, an SN slot pitch, where SN is the number of slots corresponding to one magnetic pole of the rotor.
  • the jumper wire 2B connects the slot wire in the outermost layer (Nth layer) of the winding portion to the slot wire in the innermost layer (first layer) of the slot.
  • the lead wire 5 and neutral wire 4 of each coil of each of the three phases are connected by welding to the extension wire 2e of the slot wire 2s inserted in layers other than the outermost and innermost layers of the slot.
  • the neutral wire 4 is connected by welding to the extension wire 2e of the slot wire 2s of the p+1th layer.
  • the neutral wire 4 is connected to the extension wire 2e of the slot wire 2s of the pth layer.
  • the conductor 2 of each coil goes around the outer periphery of the rotor 20 at the winding portion from the welded portion with the lead wire 5 and reaches the outermost or innermost layer of the slot. Then, the conductor 2 of each coil is passed from the outermost layer to the innermost layer or from the innermost layer to the outermost layer by the crossover wire 2B. After that, the conductor 2 of each coil goes around the outer periphery of the rotor at the winding portion and reaches the welded portion with the neutral wire 4 from the innermost or outermost layer.
  • FIG. 3 is a perspective view of the area near region III in FIG. 2, seen from a different direction.
  • FIG. 15 is a plan view of the same area.
  • FIG. 16 is a perspective view of the same area, seen from a different direction.
  • FIG. 17 is a cross-sectional view of line A-A in FIG. 15.
  • the drawer wire 5 is connected by welding to the extension wire 2e of the slot wire 2s in layers other than the outermost and innermost layers (in this example, the pth and p+1th layers).
  • the neutral wire 4 is connected by welding to the extension wire 2e of the slot wire 2s in layers other than the outermost and innermost layers (in this example, the pth and p+1th layers).
  • One end of each of the crossover wires 2Bw1 to 2Bw4 is connected by welding to the extension wire 2e(1) of the slot wire 2s in the innermost layer (first layer), and the other end is connected by welding to the extension wire 2e(N) of the slot wire 2s in the outermost layer (Nth layer).
  • each of the crossover wires 2Bw1-2Bw4 of the multiple coils of one of the three phases extends radially outward from the welded portion with the extension wire 2e(1) of the innermost layer of slot wire, is pulled out radially outward from the extension wire 2e of the winding portion, and then extends in the circumferential direction C to reach the welded portion with the extension wire 2e(N) of the outermost layer of slot wire.
  • Each of the crossover wires 2Bw1-2Bw4 has a crossover wire outer periphery 2Bw1a-2Bw4a that is a portion extending in the circumferential direction C, radially outside the extension wire 2e of the winding portion.
  • the crossover wire outer periphery 2Bw1a-2Bw4a of the multiple coils of one phase are arranged so as to overlap when viewed from the axial direction.
  • the multiple crossover wire outer periphery 2Bw1a-2Bw4a extending in the circumferential direction are arranged side by side in the axial direction. This arrangement can be repeated for each phase.
  • the neutral conductor 4 has a neutral conductor outer periphery 4a that is arranged radially outside the extension wire 2e of the winding portion, and a neutral conductor connection portion 4b that connects the neutral conductor outer periphery 4a and the extension wire 2e.
  • the neutral conductor outer periphery 4a extends in the circumferential direction C. When viewed from the radial direction, the neutral conductor outer periphery 4a is arranged so as to overlap at least a portion of the crossover conductor outer peripheries 2Bw1a to 2Bw4a that are arranged in the axial direction.
  • the circumferential length of the axially inner crossover wire outer periphery is longer than the circumferential length of the axially outer crossover wire outer periphery.
  • Each of the multiple crossover wire outer peripheries 2Bw1a to 2Bw3a overlaps with other crossover wire outer peripheries that are more axially inner over the entire circumferential direction when viewed from the axial direction. This allows the multiple crossover wire outer peripheries to be arranged more efficiently. This arrangement can be done in the same way for each phase.
  • the two outer axial crossover wire peripheral parts 2Bw3a, 2Bw4a are the outer axial crossover wire peripheral parts of crossover wires that connect slot wires with SN-1 slot pitch.
  • the two outer axial crossover wire peripheral parts 2Bw1a, 2Bw2a are the outer axial crossover wire peripheral parts of crossover wires that connect slot wires with SN+1 slot pitch.
  • the crossover wire outer periphery 2Bw1a-2Bw4a are all positioned radially inward from the outer periphery of the stator core 1 when viewed from the axial direction (see also FIG. 15). This prevents the crossover wires 2Bw1-2Bw4 from protruding radially outward from the stator core 1.
  • the neutral wire outer periphery 4a of the neutral wire 4 is also positioned radially inward from the outer periphery of the stator core 1 when viewed from the axial direction. This prevents the neutral wire 4 from protruding radially outward from the stator core 1.
  • the lead wire 5 is also positioned radially inward from the outer periphery of the stator core 1 when viewed from the axial direction. This allows the radial area occupied by the entire stator 10 to be reduced. This arrangement can be similarly performed for each phase.
  • the neutral conductor outer periphery 4a is arranged radially outward of the multiple crossover conductor outer peripheries 2Bw1a to 2Bw4a arranged in the axial direction.
  • the neutral conductor 4 has a neutral conductor connection 4b that connects the welded portion of the neutral conductor 4 with the extension conductor 2e and the neutral conductor outer periphery 4a.
  • the neutral conductor connection 4b extends radially outward from the welded portion with the extension conductor 2e to reach the neutral conductor outer periphery 4a.
  • the neutral conductor outer periphery 4a is supported by the neutral conductor connection 4b radially outward of all the crossover conductors.
  • a neutral conductor connection 4b is provided for each phase.
  • the welds between one end of each of the crossover wires 2Bw1-2Bw4 of the multiple crossover wire outer peripheries 2Bw1a-2Bw4a arranged in the axial direction and the extension wire 2e are arranged in the radial direction Rd in line with one of the welds between the neutral wire 4 and the extension wire 2e (neutral wire welds) and the welds between the draw-out wire 5 and the extension wire 2e (draw-out wire welds) (see welds 3-4w, 3-Bw21 and 3-Bw18, and 3-Bw41 and 3-Bw38 in FIG. 15).
  • crossover wires 2Bw1-2Bw4 are arranged in the radial direction Rd in line with the other of the neutral wire welds and the draw-out wire welds (see welds 3-5w, 3-Bw31 and 3-Bw48, and 3-Bw11 and 3-Bw28 in FIG. 15). This arrangement can be done in the same way in each phase.
  • the crossover wire outer peripheries 2Bw1a, 2Bw2a of the crossover wires 2Bw1, 2Bw2 that connect the slot wires with an SN+1 slot pitch are arranged adjacent to each other in the axial direction.
  • the welds at one end of these crossover wires 2Bw1, 2Bw2 are arranged adjacent to each other in the radial direction Rd (welds 3-Bw11 and 3-Bw28 in Figure 15), and the welds at the other ends are also arranged adjacent to each other in the radial direction Rd (see welds 3-Bw21 and 3-Bw18 in Figure 15).
  • the crossover wire outer peripheries 2Bw1a to 2Bw4a the crossover wire outer peripheries 2Bw3a, 2Bw4a of the crossover wires 2Bw3, 2Bw4 that connect the slot wires with an SN-1 slot pitch are arranged adjacent to each other in the axial direction.
  • the welds at one end of these crossover wires 2Bw3 and 2Bw4 are arranged side by side in the radial direction Rd (see welds 3-Bw31 and 3-Bw48 in FIG. 15), and the welds at the other ends are also arranged side by side in the radial direction Rd (see welds 3-Bw41 and 3-Bw38 in FIG. 15).
  • This increases the circumferential arrangement efficiency of the crossover wires. This arrangement can be done in the same way for each phase.
  • the welds (3-Bw31, 3-Bw41) between the innermost extension wires of the crossover wires 2Bw3 and 2Bw4 connecting the slot wires with a slot pitch of SN-1 and the welds (3-Bw11, 3-Bw21) between the innermost extension wires of the crossover wires 2Bw1 and 2Bw2 connecting the slot wires with a slot pitch of SN+1 are arranged adjacent to each other in the circumferential direction C.
  • the outer peripheries of the crossover wires of the two crossover wires that are connected by welding to the extension wires of the two innermost layers of slot wires that are adjacent to each other in the circumferential direction C, i.e., that are one slot pitch apart, can be arranged so that they overlap when viewed from the axial direction. This can increase the circumferential arrangement efficiency of the crossover wires. This arrangement can be done in the same way for each phase.
  • the lead wire 5 is connected by welding to the extension wire 2e of the slot wire in the pth layer and the p+1th layer, which are layers other than the outermost layer and the innermost layer.
  • the extension wire 2e of the pth layer to which the lead wire 5 is connected and the extension wire 2e(1) of the slot wire in the innermost layer to which the crossover wire 2B1 is connected are conductor wires of the same coil. That is, the lead wire welded portion 3-5w of the pth layer and the innermost layer crossover wire welded portion 3-Bw11 of the same coil are arranged side by side in the radial direction Rd (see FIG. 15).
  • extension wire 2e of the p+1th layer to which the lead wire 5 is connected and the extension wire 2e(N) of the slot wire in the outermost layer to which the crossover wire 2B2 is connected are conductor wires of the same coil. That is, the lead wire welded portion 3-5w of the p+1th layer and the outermost layer crossover wire welded portion 3-Bw28 of the same coil are arranged side by side in the radial direction Rd (see FIG. 15). This arrangement can be similarly performed for each coil of each phase.
  • the neutral conductor 4 is connected by welding to the extension wire 2e of the slot wire in the pth and p+1th layers, which are layers other than the outermost and innermost layers.
  • the extension wire 2e of the pth layer to which the neutral conductor 4 is connected and the extension wire 2e(1) of the slot wire in the innermost layer to which the jumper wire 2B4 is connected are conductor wires of the same coil. That is, the neutral conductor welded portion 3-4w of the pth layer and the innermost layer jumper wire welded portion 3-Bw41 of the same coil are arranged side by side in the radial direction Rd (see FIG. 15).
  • extension wire 2e of the p+1th layer to which the neutral conductor 4 is connected and the extension wire of the slot wire in the outermost layer to which the jumper wire 2B3 is connected are conductor wires of the same coil. That is, the neutral conductor welded portion 3-4w of the p+1th layer and the outermost layer jumper wire welded portion 3-Bw38 of the same coil are arranged side by side in the radial direction Rd (see FIG. 15). This arrangement can be similarly performed for each coil of each phase.
  • the outermost layer jumper wire weld 3-Bw38 of the jumper wire 2Bw3 of the innermost layer jumper wire weld 3-Bw31 which is aligned in the radial direction Rd with the draw-out wire weld 3-5w of the extension wire 2e of the pth layer, is aligned in the radial direction Rd with the neutral wire weld 3-4w of the extension wire 2e of the p+1th layer of the same coil.
  • the innermost layer jumper wire weld 3-Bw41 of the jumper wire 2Bw4 of the outermost layer jumper wire weld 3-Bw48 which is aligned in the radial direction Rd with the draw-out wire weld 3-5w of the extension wire 2e of the p+1th layer, is aligned in the radial direction with the neutral wire weld 3-4w of the extension wire 2e of the pth layer of the same coil. This arrangement can be done in the same way for each coil of each phase.
  • the lead wire 5 of one of the three phases (W phase in the example of FIG. 15) is connected by welding to the extension wires 2e of the two slot wires inserted into two adjacent slots. That is, the lead wire 5 of the one phase is connected to the extension wire 2e at each of the two lead wire welds 3-5w that are aligned in the circumferential direction. This arrangement can be similar for each phase. Note that these two lead wire welds 3-5w are examples of the first and second lead wire welds.
  • the neutral wire 4 of one of the three phases is connected by welding to the extension wires 2e of the two slot wires inserted into two adjacent slots.
  • the neutral wire 4 of the one phase is connected to the extension wire 2e at each of the two neutral wire welds 3-4w that are aligned in the circumferential direction. This arrangement can be similar for each phase. Note that these two neutral wire welds 3-4w are examples of the first and second neutral wire welds.
  • the welds (3-Bw11, 3-Bw28) between the extension wires of two of the multiple crossover wires 2Bw1 to 2Bw4 and the extension wires of two crossover wires 2Bw1, 2Bw2 are arranged next to the first outgoing wire weld in the radial direction Rd, and the welds (3-Bw31, 3-Bw48) between the extension wires of the other two crossover wires 2Bw3, 2Bw4 are arranged next to the second outgoing wire weld in the radial direction Rd.
  • welds (3-Bw21, 3-Bw18) between the extensions of two of the multiple crossover wires 2Bw1 to 2Bw4 and the first neutral wire weld are arranged next to the first neutral wire weld in the radial direction Rd
  • welds (3-Bw41, 3-Bw38) between the extensions of the other two crossover wires 2Bw3 and 2Bw4 and the second drawer wire weld are arranged next to the second drawer wire weld in the radial direction Rd.
  • the crossover wire 2Bw1 is arranged so that it passes between the two lead wire welds 3-5w of the lead wires 5 of one of the three phases (W-phase in the example of Figure 15) when viewed from the axial direction.
  • the crossover wire 2Bw1 is a crossover wire of the coil formed by the conductor to which the lead wire welds 3-5w are connected.
  • the innermost layer crossover weld 3-Bw11 of the crossover wire 2Bw1 is arranged next to one of the two lead wire welds 3-5w in the radial direction Rd. This arrangement can be done in the same way for each phase.
  • the crossover wire 2Bw4 is arranged so that it passes between the two neutral wire welds 3-4w of the neutral wire 4 of one of the three phases (W-phase in the example of FIG. 15) when viewed from the axial direction.
  • the crossover wire 2Bw4 is a crossover wire of the coil formed by the conductor to which the neutral wire welds 3-4w are connected.
  • the innermost layer crossover wire weld 3-Bw41 of the crossover wire 2Bw4 is arranged next to one of the two neutral wire welds 3-4w in the radial direction Rd. This arrangement can be done in the same way for each phase.
  • Figure 4 is a diagram showing an example of a conductor element 2sg (segment coil) forming a part of the conductor 2 shown in Figures 1 and 2.
  • Figure 4(a) shows the conductor element 2sg as viewed from the axial direction.
  • Figure 4(b) shows the conductor element 2sg as viewed from the radial direction.
  • the conductor element 2sg is formed of a single continuous conductor. In other words, there is no welding connection between both ends of the conductor element 2sg.
  • the conductor element 2sg includes a slot wire 2s inserted into the slot and an extension wire 2e extending continuously from the slot wire 2s.
  • the slot wire 2s extends linearly in the axial direction.
  • the extension wire 2e includes an oblique portion that is inclined with respect to the axial direction.
  • the conductor element 2sg is formed of two slot wires 2s, a turn portion extension wire 2eb connecting one end of these, and leg portion extension wires 2ea extending from the other end of each of the two slot wires 2s.
  • the turn portion extension wire 2eb is a continuous conductor that does not include a connection by welding and connects the two slot wires 2s.
  • the end of the leg portion extension wire 2ea becomes the end of the conductor element 2sg.
  • Both ends of the conductor element 2sg i.e., the ends of the leg portion extension wire 2ea, are located on one axial end side J1. Both ends of the conductor element 2sg are each connected to another conductor element, a crossover wire, a lead wire, or a neutral wire by welding.
  • FIG. 5 is a circuit diagram showing an example of coils formed by the conductors 2 of the stator 10.
  • the stator 10 has three-phase coils, U-phase, V-phase, and W-phase.
  • Each phase coil is composed of multiple coils (four in the example of FIG. 5) connected in parallel. That is, the U-phase coil is composed of first to fourth coils U1 to U4 connected in parallel.
  • the V-phase coil is composed of first to fourth coils V1 to V4 connected in parallel.
  • the W-phase coil is composed of first to fourth coils W1 to W4 connected in parallel.
  • One end of each phase coil is connected to a lead wire (5u, 5v, 5w), and the other end is connected to a common neutral wire 4.
  • the three-phase coils are connected in a star shape (star connection).
  • the lead wires 5u, 5v, 5w are lines that transmit the current of each of the three phases of the motor 100.
  • the lead wires may also be called, for example, phase current input/output lines, power lines, or power lines.
  • Figure 6 is a diagram showing an example of the arrangement of slot lines of three-phase coils arranged in the slots of the stator 10.
  • the slot group of the stator core 1 is divided into multiple groups (unit areas A1 to A12) corresponding to the magnetic poles of the rotor 20.
  • the unit areas A1 to A12 are obtained by dividing the entire slot group of the stator core 1 in the circumferential direction into the number of slots (SN) corresponding to one magnetic pole.
  • the rotor 20 has multiple magnetic poles formed by magnets 23 arranged in the rotor core 22.
  • the multiple magnetic poles are arranged at regular intervals in the circumferential direction. Two magnetic poles adjacent in the circumferential direction have different polarities.
  • the multiple magnetic poles are arranged on the outer periphery side of the rotor core 22 so that their polarities are alternately different at a specified distance in the circumferential direction.
  • the number of unit areas corresponding to the magnetic poles of the slot group of the stator core 1 is the same as the number of magnetic poles of the rotor 20.
  • the unit areas of the slot group are arranged at equal intervals in the circumferential direction.
  • the number of slots in one unit area is SN slots.
  • the upper diagram of FIG. 6 shows an example of the arrangement of the slot lines of each coil in the slots of the unit area A1 corresponding to one magnetic pole.
  • the slot lines of each of the three phases are inserted into two slots adjacent to each other in the circumferential direction. That is, the multiple slots of the stator core 1 are composed of U-phase slots, V-phase slots, and W-phase slots arranged in pairs in the circumferential direction. Two adjacent slots are occupied by slot lines of the same phase.
  • the slot lines of each coil are arranged in a dispersed manner so as not to be adjacent in either the circumferential or radial directions.
  • the two adjacent slots of each phase are referred to as the left slot and the right slot.
  • left and right refer to the circumferential left and right when looking from the radial inside to the outside with one axial end of the stator facing up.
  • A1-u1 and A1-u2 of the U phase A1-u1 is the left slot and A1-u2 is the right slot.
  • FIG. 7 shows an example of wiring in the stator 10 for the first coil U1 of the U phase shown in FIG. 5.
  • FIG. 8 shows an example of wiring for the second coil U2 of the U phase
  • FIG. 9 shows an example of wiring for the third coil U3 of the U phase
  • FIG. 10 shows an example of wiring for the fourth coil U4 of the U phase.
  • some of the slots are omitted and the number of slots is set to 48.
  • the slot wire of the corresponding coil is inserted into the slot with dot hatching.
  • the solid arrow indicates the connection relationship by the extension wire (leg extension wire in this example) or crossover wire on one axial end side J1.
  • the dashed arrow indicates the connection relationship by the extension wire (turn extension wire in this example) on the other axial end side J2.
  • the direction of the arrow indicates the direction from the lead wire 5u toward the neutral wire.
  • the arrows in Figures 7 to 10 indicate the connection relationship of the extension wires and crossover wires, and the specific shapes of the extension wires and crossover wires differ from the arrows shown in Figures 7 to 10.
  • Su1 to Su4 in Figures 7 to 10 indicate the slot lines that are the start points of the first to fourth coils U1 to U4, respectively.
  • Gu1 to Gu4 indicate the slot lines that are the end points of the first to fourth coils U1 to U4, respectively.
  • the draw-out wire 5u is connected by welding to the extension wire extending from the slot line at the start point.
  • the neutral wire 4 is connected by welding to the extension wire extending from the slot line at the end point.
  • the slot lines at the start point Su1 and end point Gu1 are both inserted into layers other than the outermost layer (Nth layer) and innermost layer (first layer) of the slot (in the example of FIG. 7, Su1 is the fourth layer and Gu1 is the fifth layer). That is, in the coil U1, the lead wire 5u and the neutral conductor 4 are connected by welding to the extension wire of the slot line inserted into layers other than the outermost layer (Nth layer) and innermost layer (first layer) of the slot. As shown in FIG. 8 to FIG. 10, in each of the coils U2 to U4, the slot lines at the start points Su2 to Su4 and end points Gu2 to Gu4 are similarly inserted into layers other than the outermost layer (Nth layer) and innermost layer (first layer) of the slot.
  • the conductor forming coil U1 includes a winding section in which slot wires inserted into the slots are connected in series by extension wires and wind around the outer periphery of rotor 20, and a crossover wire 2Bu1 that connects the slot wires of the outermost layer (Nth layer) of slots in the winding section to the slot wires of the innermost layer (first layer) of slots.
  • the slot wires are connected at an SN slot pitch.
  • SN is the number of slots per pole.
  • Crossover wire 2Bu1 connects the outermost layer and the innermost layer between slots with an SN-1 slot pitch or an SN+1 slot pitch.
  • the slot wires of the outermost layer and the slot wires of the innermost layer connected by crossover wire 2Bu1 are separated by an SN-1 slot pitch or an SN+1 slot pitch.
  • SN 6
  • the SN slot pitch is the pitch (spacing) from one slot to the SN-th slot in the circumferential direction. Between two slots that are SN slot pitches apart, there are SN-1 slots.
  • the conductors of coils U2 to U4 each include a winding portion and jumper wires 2Bu2 to 2Bu4.
  • the jumper wire 2Bu2 of the second coil U2 connects slot wires with SN+1 slot pitch.
  • the jumper wire 2Bu3 of the third coil U3 connects slot wires with SN-1 slot pitch.
  • the jumper wire 2Bu4 of the fourth coil U4 connects slot wires with SN-1 slot pitch.
  • the conductors of V-phase coils V1 to V4 and W-phase coils W1 to W4 each also include a winding portion and jumper wires, similar to Figures 7 to 10. The jumper wires connect slot wires with SN-1 or SN+1 slot pitch.
  • the lead wires 5v, 5w and neutral wire 4 are connected by welding to the extension wire of the slot wire inserted in layers other than the outermost and innermost layers of the slot.
  • the V-phase coils V1 to V4 may be formed of conductors that are shifted circumferentially by SN+2 slot pitches from the conductors of the U-phase coils U1 to U4 shown in Figures 7 to 10.
  • the W-phase coils W1 to W4 may be formed of conductors that are shifted circumferentially by (2 x SN + 4) slot pitches from the U-phase coils U1 to U4 shown in Figures 7 to 10.
  • the slot lines that are the start and end points of each coil of each phase are arranged in layers other than the outermost and innermost layers.
  • the slot lines with SN slot pitch are connected in series by extension wires.
  • the jumper wires of each coil connect the outermost layer and the innermost layer between slots with SN-1 slot pitch or SN+1 slot pitch.
  • the jumper wires connect the slot lines of the outermost layer and the innermost layer, and the arrangement of the slot lines in two adjacent slots is swapped. Therefore, the jumper wires can simplify the configuration for distributing the slot lines of each coil.
  • the wiring of the winding portion can be simplified. As a result, the structure of the conductor lines that form the coils can be simplified.
  • the slot line of the starting point Su1 of coil U1 is the fourth layer of the U-phase right slot u2 (A2-u2 slot) of unit area A2 corresponding to the pole of the rotor.
  • the slot lines of the fourth layer and the third layer of the U-phase right slot of each pole are alternately connected in series by an extension line. That is, the slot lines of the fourth layer and the third layer of adjacent unit areas are alternately connected at the SN slot pitch.
  • the conductor of coil U1 makes one revolution around the rotor in the fourth and third layer areas of the slot.
  • the slot line of the third layer of the A1-u2 slot of unit area A1 adjacent to A2 is connected to the second layer of the A2-u2 slot of unit area A2 via an extension line. Then, the slot lines of the second and first layers of the U-phase right slot of each unit area are alternately connected in series by an extension line. As a result, the conductor of coil U1 makes one revolution in the second and first layer areas.
  • the slot wire of the first layer of the A1-u2 slot is connected to the left slot (A8-u1 slot) of the unit area A8 next to A1 by the crossover wire 2Bu1.
  • the slot wire of the 8th layer and the slot wire of the 7th layer of the left slot of the U phase of each pole are alternately connected in series by the extension wire.
  • the conductor wire of the coil U1 makes one revolution around the rotor in the 8th and 7th layer regions, then makes one revolution around the rotor in the 6th and 5th layer regions, and is connected to the neutral conductor 4 by the extension wire extending from the slot wire at the end point Gu1.
  • the jumper wire can make the slot arrangement of the slot line of the same coil different between the 1st to pth layers and the p+1th to Nth layers.
  • the slot line of each coil can be arranged in one slot in the 1st to pth layers and in the other slot in the p+1th to Nth layers.
  • This slot line arrangement is similar for each of the coils U2 to U4 shown in FIG. 8 to FIG. 10.
  • the crossover wires that connect the slot lines with SN-1 or SN+1 slot pitches allow the left and right slot arrangements to be efficiently switched.
  • the crossover wire 2Bu1 is connected by welding to the extension wire 2e extending from the slot wire of the outermost layer (Nth layer) of the A8-u1 slot.
  • the extension wire 2e has a diagonal portion, for example, like the leg extension wire 2ea in FIG. 4. This extension wire extends clockwise by (SN/2) slots. Therefore, the position of the outermost layer crossover wire weld 3-Bu18 of the crossover wire 2Bu1 is shifted clockwise by (SN/2) slots from the A8-u1 slot.
  • the neutral wire 4 is connected by welding to the extension wire 2e extending from the slot wire of the A1-u1 slot at the end point Gu1. This extension wire extends counterclockwise by (SN/2) slots.
  • the position of the neutral wire weld 3-4ue is shifted counterclockwise by (SN/2) slots from the A1-u1 slot.
  • the outermost layer jumper welded portion 3-Bu18 and the neutral conductor welded portion 3-4ue are both located axially outside the A8-v2 slot. Therefore, the outermost layer jumper welded portion 3-Bu18 and the neutral conductor welded portion 3-4ue are arranged side by side in the radial direction.
  • the crossover wire 2Bu1 is connected by welding to the extension wire 2e extending from the slot wire of the innermost layer (first layer) of the A1-u2 slot.
  • This extension wire extends clockwise by (SN/2) slots. Therefore, the position of the innermost layer crossover wire weld 3-Bu11 of the crossover wire 2Bu1 is shifted clockwise by (SN/2) slots from the A1-u2 slot.
  • the draw-out wire 5u is connected by welding to the extension wire 2e extending from the slot wire of the A2-u2 slot at the starting point Su1.
  • This extension wire extends counterclockwise by (SN/2) slots. Therefore, the position of the draw-out wire weld 3-5ue is shifted counterclockwise by (SN/2) slots from the A2-u2 slot.
  • the innermost layer jumper welded portion 3-Bu11 and the draw-out wire welded portion 3-5ue are both located axially outside the A1-w1 slot. Therefore, the innermost layer jumper welded portion 3-Bu11 and the draw-out wire welded portion 3-5ue are arranged side by side in the radial direction.
  • an extension line extends from the slot line of the 8th layer in the circumferential direction clockwise (right), and an extension line extends from the slot line of the 7th layer in the circumferential direction counterclockwise (left).
  • the dotted arrows of the A8-u1 slot in FIG. 7 indicate the direction in which the extension line extends in the circumferential direction.
  • the extension lines extend from the slot lines in the 6th layer clockwise (right), the 5th layer counterclockwise (left), the 4th layer counterclockwise (left), the 3rd layer clockwise (right), the 2nd layer counterclockwise (left), and the 1st layer clockwise (right).
  • the extension lines extend from the slot lines of the outermost and innermost layers on one side of the circumferential direction (one direction), and the extension lines extending from the slot lines of the pth and p+1th layers on the other side of the circumferential direction (opposite to the one direction).
  • the direction of the extension wire is also the same in the slots at the base of the extension wire to which the lead wire or neutral wire is welded (A2-u2 slot and A1-u1 slot in FIG. 7).
  • the weld between the jumper wire and the extension wire and the weld between the lead wire or neutral wire and the extension wire are arranged side by side in the radial direction.
  • the extension wire in one slot, extends in alternate directions from the innermost layer to the pth layer and from the p+1th layer to the outermost layer.
  • the extension wires of adjacent layers extend in opposite directions.
  • the extension wires of the one slot can extend in the same direction in all slots.
  • extension lines and welds can also be made in the same way in Figures 8 to 10.
  • Welds can also be similarly arranged in the U-phase, V-phase, and W-phase.
  • the winding direction of the winding part of the first to fourth layers is clockwise, while the winding direction of the winding part of the fifth to eighth layers is counterclockwise.
  • the winding direction of the winding part of the first to fourth layers is also opposite to that of the winding part of the fifth to eighth layers. In this way, by reversing the winding direction between the first to pth layers and the p+1th to Nth layers, the start and end points of each coil can be positioned close to each other. This allows the welds between the lead wires of each coil and the conductor of the neutral wire to be positioned efficiently.
  • the winding direction of the winding part is either counterclockwise or clockwise, and is determined based on the direction from the lead wire to the neutral wire when viewed from one axial end side.
  • the winding portion of each conductor of the four coils U1 to U4 of the U phase is configured by connecting slot lines of a constant SN slot pitch with an extension line.
  • the configuration of the conductor can be simplified. For example, it becomes easier to make the shape of the conductor element 2sg uniform.
  • the layers of the two slot lines connected by an extension wire are shifted by one layer in the radial direction.
  • the layer into which one of the two slot lines is inserted, which is inserted into two slots separated by an SN slot pitch and connected by an extension wire is one layer away from the layer into which the other slot line is inserted.
  • the conductor of each coil is arranged to wind around the rotor 20 while shifting by one layer in the radial direction for each SN slot pitch. This makes it possible to simplify the configuration of the slot lines and extension wires.
  • the radial component of the extension line (dashed line) on the other axial end side which runs counterclockwise from the slot line inserted in the 5th to 8th layers toward the slot line separated by SN slot pitches, is inward.
  • the radial component of the extension line on the other axial end side between the 1st to pth layers and the p+1th to Nth layers, it is possible to arrange the slot lines in such a way that the circulating current can be suppressed while simplifying the configuration of the coil conductor.
  • Figure 11 is a view of the stator 10 shown in Figures 1 and 2 as viewed from the other axial end.
  • one region of the extension wires 2e in the first to fourth layers is indicated by dotted line 2e1
  • one region of the extension wires 2e in the fourth to eighth layers is indicated by dotted line 2e2.
  • the extension wires 2e in the first to fourth layers in this example, turn portion extension wire 2eb (see Figure 4)
  • the extension wires 2e (turn portion extension wire 2eb) of the conductor elements on the other axial end side are arranged in an almost uniform and regular pattern. In this way, by reversing the radial shift direction of the extension wire 2e in the 1st to pth layers and the (p+1)th to Nth layers, the arrangement efficiency of the extension wire 2e (turn portion extension wire 2eb) can be improved.
  • FIG. 12 shows an example of the wiring of slot lines at the start points Su, Sv, Sw and end points Gu, Gv, Gw of the four coils U1-U4, V1-V4, W1-W4 of the U-phase, V-phase, and W-phase, respectively, and crossover wires 2Bu1-4, 2Bv1-4, 2Bw1-4.
  • some of the slots are omitted in FIG. 12, and the number of slots is set to 48.
  • the slot lines that are the start or end points of each coil are inserted into the dot-hatched slots.
  • the direction of the arrow of crossover wire 2B indicates the direction from the lead wire to the neutral wire. Note that the arrows of the crossover wires in FIG. 12 indicate the connection relationship, and the specific shape of the crossover wires differs from the arrows shown in FIG. 12.
  • the slot lines of the U-phase starting points Su1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A2-u1, A2-u2 of the U-phase.
  • the U-phase lead wires 5u are connected by welding to the extension wires extending from each of the four slot lines of the starting points Su1 to 4.
  • the slot lines of the V-phase starting points Sv1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A3-v1, A3-v2 of the V-phase.
  • the V-phase lead wire 5v is connected by welding to the extension wires extending from the four slot lines of the starting points Sv1 to 4.
  • the slot lines of the W-phase starting points Sw1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A4-w1, A4-w2 of the W-phase.
  • the W-phase lead wire 5w is connected by welding to the extension wires extending from these four slot wires.
  • the lead wires 5u, 5v, and 5w of each of the three phases are connected by welding to the extension wires of the slot wires of the pth and p+1th layers, which are layers other than the outermost and innermost layers of the two adjacent slots of each phase.
  • the lead wires 5u, 5v, 5w are connected by welding to the extension wires extending from two slot wires inserted in two layers in one slot of each phase.
  • the lead wire 5u is connected to the extension wire of the slot wire in two layers (fourth and fifth layers) of one slot.
  • This configuration in which the lead wires are connected to two layers of one slot allows the welded parts of the lead wires 5u, 5v, 5w to be concentrated and their area reduced. This allows the lead wires to be efficiently arranged in the coil end portion.
  • the slot lines of the U-phase end points Gu1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A1-u1 and A1-u2 of the U-phase.
  • the neutral conductor 4 is connected by welding to the extension lines extending from each of the four slot lines of the end points Gu1 to 4.
  • the slot lines of the V-phase end points Gv1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A2-v1 and A2-v2 of the V-phase.
  • the neutral conductor 4 is connected by welding to the extension lines extending from the four slot lines of the end points Gv1 to 4.
  • the slot lines of the W-phase end points Gw1 to 4 are four slot lines of the fourth and fifth layers in two adjacent slots A3-w1 and A3-w2 of the W-phase.
  • the neutral wire 4 is connected by welding to the extension wires extending from these four slot wires. In this way, the neutral wire 4 connected to the coils of each of the three phases is connected by welding to the extension wires of the slot wires of the pth and p+1th layers, which are layers other than the outermost and innermost layers of the two adjacent slots of each phase.
  • the neutral conductor 4 is connected by welding to an extension wire extending from two slot wires inserted in two layers in one slot of each phase. This allows the welded parts of the neutral conductor 4 to be concentrated and their area to be small. This allows the neutral conductor to be efficiently arranged in the coil end portion.
  • the slot lines of the start points Su, Sv, Sw and the slot lines of the end points Gu, Gv, Gw of each phase are arranged in two unit areas corresponding to two adjacent poles. That is, the slot lines of the end points Gu, Gv, Gw are arranged in the unit area adjacent to the unit area of the slot lines of the start points Su, Sv, Sw of each phase.
  • the slot lines of the end points Gu1 to Gu4 are arranged in the unit area A1 adjacent to the unit area A2 of the slot lines of the start points Su1 to Su4. This allows the start points and end points of each phase to be concentrated in the circumferential direction. Therefore, the welds of the lead wires 5u, 5v, 5w of each phase and the welds of the neutral wire 4 can be arranged efficiently.
  • the slot line of the start point Su of the U phase and the slot line of the start point Sv of the V phase are arranged in two adjacent unit areas A2 and A3, and the slot line of the start point Sv of the V phase and the slot line of the start point Sw of the W phase are arranged in two adjacent unit areas A3 and A4.
  • the slot lines that are the start points Su, Sv, and Sw of the three phases are arranged in three unit areas A2, A3, and A4 corresponding to three consecutively adjacent poles. This allows the lead lines to be arranged more efficiently.
  • the slot lines that are the end points of two of the three phases are arranged in two unit areas corresponding to two adjacent poles. This allows the neutral conductor 4 to be arranged efficiently.
  • the slot lines that are the end points Gu, Gv, and Gw of the three phases are arranged in three unit areas A1, A2, and A3 that correspond to three consecutive adjacent poles. This allows the neutral line to be arranged efficiently.
  • the slot line of the start point Su of the U phase and the slot line of the end point Gv of the V phase are arranged in the unit area A2 of the same pole. This allows the lead wire 5u and the neutral wire 4 to be arranged efficiently.
  • the slot line of the start point Sv of the V phase and the slot line of the end point Gw of the W phase are arranged in the unit area A3 of the same pole. In this way, in a unit area corresponding to one pole, a slot line that is the start point of one phase and a slot line that is the end point of a different phase can be arranged. This allows the lead wire 5v and the neutral wire 4 to be arranged efficiently.
  • by arranging the slot lines of the start points and end points of different phases in each of two unit areas corresponding to two adjacent poles the arrangement efficiency can be further improved.
  • the slot pitch of the slot lines connected by the jumper wires is the same as the slot pitch of the slot lines at the start and end points.
  • coil U4 In this way, by making the slot pitch of the jumper wires of each coil the same as the slot pitch of the slot lines at the start and end points, the coil conductors can be arranged more efficiently.
  • FIG. 13 is a view of the stator 10 shown in FIGS. 1 and 2, viewed from one axial end.
  • the wiring of the crossover wires 2Bu1-4, 2Bv1-4, 2Bw1-4, lead wires 5u, 5v, 5w, and neutral wire 4 in FIG. 13 is the wiring shown in FIG. 12 applied to a 72-slot stator 10.
  • FIG. 14 is a perspective view showing only the crossover wires 2Bu1-4, 2Bv1-4, 2Bw1-4 in FIG. 13.
  • FIG. 15 is an enlarged view of a portion of FIG. 13.
  • FIG. 16 is a perspective view of the portion shown in FIG. 15.
  • the range 4c in which the neutral wire outer periphery extends in the circumferential direction overlaps with the ranges 2Buc, 2Bvc, 2Bwc in which the outer periphery of the crossover wires 2Bu1-4, 2Bv1-4, 2Bw1-4 of each phase extend in the circumferential direction.
  • at least a portion of the outer periphery of the multiple crossover wires that overlap when viewed from the axial direction of each phase overlaps with a portion of the neutral wire outer periphery when viewed from the radial direction.
  • the neutral wire outer periphery 4a is arranged so that the entire outer periphery of the crossover wires 2Bv1-2Bv4 of the multiple coils of V-phase overlaps with the neutral wire outer periphery 4a when viewed from the radial direction.
  • the welded portion 3-Bw18 between the extension wire 2ew18 of the outermost layer of the slot wire of the first coil W1 of the W phase and the crossover wire 2Bw1, and the welded portion 3-Bw21 between the extension wire 2ew21 of the innermost layer of the slot wire of the second coil W2 and the crossover wire 2Bw2 are arranged side by side in the radial direction.
  • the welded portion between the extension wire of the slot wire of the outermost layer of the first coil of each phase and the crossover wire, and the welded portion between the extension wire of the slot wire of the innermost layer of the second coil and the crossover wire may be arranged side by side in the radial direction. This allows the welded portions of the crossover wires to be arranged efficiently.
  • the welded portion 3-Bw38 between the extension wire 2ew38 of the outermost layer of the slot wire of the third coil W3 of the W phase and the crossover wire 2Bw3, and the welded portion 3-Bw41 between the extension wire 2ew41 of the innermost layer of the slot wire of the fourth coil W4 and the crossover wire 2Bw4 are arranged side by side in the radial direction.
  • the welded portion between the extension wire of the slot wire of the outermost layer of the third coil of each phase and the crossover wire, and the welded portion between the extension wire of the slot wire of the innermost layer of the fourth coil and the crossover wire may be arranged side by side in the radial direction. This allows the welded portions of the crossover wires to be arranged efficiently.
  • the welded portion 3-Bw28 between the extension wire 2ew28 of the outermost layer of the slot wire of the second coil W2 of the W phase and the crossover wire 2Bw2, and the welded portion 3-Bw11 between the extension wire 2ew11 of the innermost layer of the slot wire of the first coil W1 and the crossover wire 2Bw1 are arranged side by side in the radial direction.
  • the welded portion 3-Bw48 between the extension wire 2ew48 of the outermost layer of the slot wire of the fourth coil W4 of the W phase and the crossover wire 2Bw4, and the welded portion 3-Bw31 between the extension wire 2ew31 of the innermost layer of the slot wire of the third coil W3 and the crossover wire 2Bw3 are arranged side by side in the radial direction. This allows the welded portions at both ends of the crossover wires 2Bw1 to 2Bw4 to be arranged efficiently.
  • the crossover wires 2Bw3, 2Bw4 of the third and fourth coils W3, W4 of the W phase are arranged circumferentially between both ends of the crossover wires 2Bw1, 2Bw2 of the first and second coils W1, W2.
  • the crossover wires of the third and fourth coils are arranged between both ends of the crossover wires of the first and second coils (see FIG. 13 and FIG. 14).
  • the crossover wires 2Bw3, 2Bw4 connecting slots with an SN-1 slot pitch can be arranged between both circumferential ends of the crossover wires 2Bw1, 2Bw2 connecting slots with an SN+1 slot pitch. This allows the four crossover wires of each phase to be arranged efficiently.
  • the weld 3-Bw38 between the jumper wire 2Bw1 of the first coil W1 and the extension wire 2ew18 of the outermost layer, and the weld 3-Bw28 between the jumper wire 2Bw2 of the second coil W2 and the extension wire 2ew28 of the outermost layer, the weld 3-Bw38 between the jumper wire 2Bw3 of the third coil and the extension wire 2ew38 of the outermost layer, and the weld 3-Bw48 between the jumper wire 2Bw4 of the fourth coil and the extension wire 2ew48 of the outermost layer are arranged.
  • the crossover wires 2Bw1 to 2Bw4 of each of the W-phase coils have a crossover wire outer periphery (see 2Bw1a to 2Bw4a in FIG. 3) that extends in the circumferential direction C radially outside the extension wire 2e of the winding portion.
  • the crossover wire outer peripheries of the crossover wires 2Bw1 to 2Bw4 are arranged so as to overlap when viewed from the axial direction.
  • the neutral wire 4 has a neutral wire outer periphery (see 4a in FIG. 2 and FIG. 3) that extends in the circumferential direction C radially outside the extension wire 2e of the winding portion.
  • the neutral wire outer periphery 4a is arranged so as to pass radially outside at least a portion of the crossover wire outer periphery of the crossover wires 2Bw1 to 2Bw4. This arrangement can also be used for each of the U-phase and W-phase.
  • each of the crossover wires 2Bw1-2Bw4 is welded to the radially outer surface of the extension line of the slot wire of the outermost layer.
  • the other end of each of the crossover wires 2Bw1-2Bw4 is welded to the radially outer surface of the extension line of the slot wire of the innermost layer. That is, at the welded parts 3-Bw11-41, 18-48 at both ends of the crossover wires 2Bw1-2Bw4, the crossover wires are welded to the radially outer surface of the extension line. This allows the crossover wires to be arranged efficiently. In the example of FIG.
  • the crossover wires 2Bw1-2Bw4 extend radially outward from the radially outer surface of the extension line of the slot wire of the innermost layer, wrap around to the radially outer side of the extension line of the slot wire of the outermost layer, and reach the radially outer surface of the extension line.
  • the crossover wires 2Bw1 to 2Bw4 extend axially inward from the welds 3-Bw11 to 3-Bw41 with the extension lines of the innermost layer slot wires, and then curve in both the radial and circumferential directions. After curving, they extend radially and are pulled out radially outward from the extension lines of the surrounding portions.
  • the crossover wire connection portions of the crossover wires 2Bw1 to 2Bw4 have portions that extend radially outward at positions shifted circumferentially from the welds 3-Bw11 to 3-Bw41. These portions are located axially inward of the welds 3-Bw11 to 3-Bw41. This allows the crossover wires to be pulled out radially outward efficiently.
  • a circumferential weld 3-er is disposed on one axial end of the stator core 1, connecting the extension wires of the slot wires of the winding portion.
  • the circumferential weld 3-er is a weld that connects the extension wires (leg extension wires 2ea) extending from two slot wires of the SN slot pitch in the winding portion of each coil.
  • the end of a conductor element 2sg as shown in FIG. 4 is welded to the end of another conductor element 2sg to form the circumferential weld 3-er.
  • FIG. 17 is a cross-sectional view taken along line A-A in FIG. 15.
  • FIG. 17 shows a cross-section near coil end portion E1 in a plane parallel to the radial and axial directions (a plane perpendicular to the circumferential direction) that passes through welded portion 3-Bw31 between extension line 2ew31 of the innermost layer of slot wire and crossover wire 2Bw3.
  • welded portion 3-Bw31 between extension line 2ew31 of the innermost layer of slot wire and crossover wire 2Bw3 is positioned axially outward of orbital welded portion 3-er. This allows the crossover wire to be positioned efficiently.
  • the crossover wire can be drawn out to the outermost layer by passing axially outward of the orbital welded portion.
  • one end of the crossover wire 2Bw3 is welded to a portion of the extension wire 2ew31 of the innermost layer of the slot wire that is radially inward from the innermost layer of the slot.
  • the end of the extension wire 2ew31 to which the crossover wire 2Bw3 is welded is radially inward from the innermost layer of the slot wire. This makes it easier to install the crossover wire and improves durability after installation.
  • the extension wire 2ew31 has a portion that curves radially inward axially outward from the circumferential weld 3-er.
  • the weld 3-5w between the draw-out wire 5w and the extension wire 2ew05 is positioned axially outward of the orbital weld 3-er. This allows the draw-out wire to be positioned efficiently.
  • the draw-out wire 5w and the two extension wires 2ew05, 2ew04 are positioned overlapping in the radial direction. In this way, by overlapping and welding the draw-out wire, the extension wire of the slot wire of the pth layer, and the extension wire of the slot wire of the p+1th layer, the welds of the draw-out wires can be positioned in a concentrated manner.
  • the draw-out wire weld 3-5w when viewed from the radial direction, at least a portion of the draw-out wire weld 3-5w is positioned so as to overlap at least one of the innermost layer jumper wire welds 3-Bw31. This allows the connection wire welds and jumper wire welds to be positioned efficiently.
  • the draw-out wire weld 3-5w and the innermost layer jumper wire weld 3-Bw31 have the same axial height.
  • at least a portion of the neutral conductor weld 3-4w may be positioned so as to overlap at least one of the innermost layer jumper wire welds 3-Bw31.
  • the weld 3-4w between the neutral conductor 4 and the extension wires is positioned axially outward from the circumferential weld 3-er. This allows the neutral conductor to be positioned efficiently.
  • the neutral conductor 4 and the two extension wires are positioned overlapping in the radial direction. In this way, by overlapping and welding the neutral conductor, the extension wire of the slot wire of the pth layer, and the extension wire of the slot wire of the p+1th layer, the welds of the neutral conductor can be positioned in a concentrated manner.
  • Embodiments of the present invention are not limited to the above example.
  • two slots are assigned per pole per phase.
  • the number of slots in the stator is 72.
  • the number of slots is not limited to 72 and may be, for example, 48.
  • the number of poles is 12, but the number of poles is not limited to this and may be, for example, 8.
  • the number of layers N is not limited to 8.
  • the number of coils connected in parallel in one phase is not limited to four.
  • two coils per phase may be connected in parallel.
  • Each phase coil group has at least two parallel coils, and may be configured as four, six, or eight parallel coils depending on the required performance and characteristics.
  • the motor is typically a three-phase AC motor.
  • the motor may be a reluctance synchronous motor or an induction motor.
  • the motor may be, as an example, an embedded permanent magnet synchronous motor.
  • the conductor wire may be a rectangular wire.
  • the pull-out wire 5, neutral wire 4, and jumper wire 2B are all connected to the extension wire at one axial end. This is not limited to the above configuration, and at least one of the pull-out wire 5, neutral wire 4, and jumper wire 2B may be connected to the extension wire at the other axial end. For example, some of the pull-out wire 5, neutral wire 4, and jumper wire 2B may be disposed at the coil end portion at one axial end, and the rest at the coil end portion at the other axial end.
  • the outer peripheries of the four jumper wires of the four coils of each phase overlap when viewed in the axial direction.
  • the outer peripheries of some but not all of the jumper wires of the multiple coils of each phase may overlap when viewed in the axial direction.
  • the outer peripheries of the jumper wires of coils of different phases may overlap when viewed in the axial direction.
  • the welds at the ends of the multiple jumper wire outer peripheries that overlap when viewed in the axial direction are arranged radially side by side with the draw-out wire welds and the neutral wire welds.
  • the welds at the ends of the jumper wires may be arranged radially side by side with only either the draw-out wire welds or the neutral wire welds. Or, the welds at the ends of the jumper wires do not have to be radially side by side with either the draw-out wire welds or the neutral wire welds.
  • stator core 1: stator core
  • 2s slot wire
  • 2e extension wire
  • 2B crossover wire
  • U1 to U4 U-phase coil
  • V1 to V4 V-phase coil
  • W1 to W4 W-phase coil
  • 3 welded portion
  • 4 neutral wire

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

Un stator d'un moteur 100 comprend : un noyau de stator 1 ; et un fil conducteur 2 qui comprend un fil à fentes 2s et un fil d'extension 2e. Une pluralité de bobines sont formées par le fil conducteur 2. Le fil conducteur formant chaque bobine comprend : une section circulaire dans laquelle un groupe de fils à fentes connectés en série forment un cercle autour de la périphérie externe d'un rotor ; et des fils de croisement 2Bw1 à 2Bw4 connectant la couche la plus à l'extérieur à la couche la plus à l'intérieur de la section circulaire. Un fil neutre 4 de chaque bobine est connecté, par soudage, au fil d'extension autre que la couche la plus à l'extérieur et la couche la plus à l'intérieur de la fente. Les fils de croisement 2Bw1 à 2Bw4 de chaque bobine ont des sections périphériques externes de fil de croisement 2Bw1a à 2Bw4a s'étendant dans une direction circonférentielle sur le côté externe radial de la section de cercle. Les sections périphériques externes de fil de croisement d'au moins deux fils de croisement se chevauchent lorsqu'elles sont vues depuis une direction axiale. Le fil neutre a une section périphérique externe de fil neutre 4a s'étendant dans la direction circonférentielle sur le côté externe radial de la section circulaire. La section périphérique externe de fil neutre 4a est agencée de sorte à chevaucher au moins une partie des sections périphériques externes de fil de croisement lorsqu'elle est vue depuis la direction radiale.
PCT/JP2024/008743 2023-04-28 2024-03-07 Moteur Pending WO2024224823A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011045165A (ja) * 2009-08-19 2011-03-03 Aisin Aw Co Ltd 回転電機用電機子
US20140033514A1 (en) * 2012-08-06 2014-02-06 Remy Technologies, Llc Electric machine with single or dual-shape winding configuration and method
JP2018099010A (ja) * 2016-12-15 2018-06-21 スズキ株式会社 回転電機
CN108736599A (zh) * 2017-04-19 2018-11-02 Lg电子株式会社 旋转电机的定子
CN109586465A (zh) * 2017-09-29 2019-04-05 比亚迪股份有限公司 定子组件和具有其的电机和车辆
WO2020026707A1 (fr) * 2018-07-31 2020-02-06 アイシン・エィ・ダブリュ株式会社 Armature
US20200212747A1 (en) * 2018-07-30 2020-07-02 Ford Global Technologies, Llc Stator winding method and stator core winding

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011045165A (ja) * 2009-08-19 2011-03-03 Aisin Aw Co Ltd 回転電機用電機子
US20140033514A1 (en) * 2012-08-06 2014-02-06 Remy Technologies, Llc Electric machine with single or dual-shape winding configuration and method
JP2018099010A (ja) * 2016-12-15 2018-06-21 スズキ株式会社 回転電機
CN108736599A (zh) * 2017-04-19 2018-11-02 Lg电子株式会社 旋转电机的定子
CN109586465A (zh) * 2017-09-29 2019-04-05 比亚迪股份有限公司 定子组件和具有其的电机和车辆
US20200212747A1 (en) * 2018-07-30 2020-07-02 Ford Global Technologies, Llc Stator winding method and stator core winding
WO2020026707A1 (fr) * 2018-07-31 2020-02-06 アイシン・エィ・ダブリュ株式会社 Armature

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