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WO2013039026A1 - Machine de travail - Google Patents

Machine de travail Download PDF

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Publication number
WO2013039026A1
WO2013039026A1 PCT/JP2012/073017 JP2012073017W WO2013039026A1 WO 2013039026 A1 WO2013039026 A1 WO 2013039026A1 JP 2012073017 W JP2012073017 W JP 2012073017W WO 2013039026 A1 WO2013039026 A1 WO 2013039026A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow path
straight
channel
power module
straight flow
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.)
Ceased
Application number
PCT/JP2012/073017
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English (en)
Japanese (ja)
Inventor
和也 横山
晃伸 中條
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.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries 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 Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP2013533653A priority Critical patent/JP6281840B2/ja
Publication of WO2013039026A1 publication Critical patent/WO2013039026A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the present invention relates to a work machine equipped with a power conversion device having a cooling function.
  • hybrid work machines equipped with an engine and electric motor have been developed.
  • an inverter power converter
  • IPM internal magnet embedded
  • a DC-DC converter is used to control charging / discharging of the battery.
  • a U-shaped curved cooling pipe is used.
  • cooling pipe When the cooling pipe is bent, the internal flow is separated. When separation occurs in the flow, the cooling capacity of the portion decreases. For this reason, the cooling capacity varies depending on the location, and sufficient cooling capacity may not be obtained depending on the location. A partial decrease in cooling capacity causes a failure of a semiconductor element or the like used in the power conversion device. In particular, since the work machine may be used in a severe environment of high temperature, it is desirable to ensure a sufficient cooling capacity.
  • a cooling plate including a flow path for flowing a cooling medium;
  • a work machine equipped with a power converter having a power module attached to the cooling plate and thermally coupled to the cooling plate,
  • the flow path is disposed at a side of the first linear flow path for flowing the cooling medium in a first direction, and a second direction opposite to the first direction.
  • the second straight flow path for flowing the cooling medium through the first straight flow path, the first straight flow path, and the second straight flow path are changed, and the traveling direction of the cooling medium flowing through the first straight flow path is changed.
  • a work machine is provided in which the area of the region where the second straight channel and the power module overlap is larger than the area of the region where the first straight channel and the power module overlap.
  • a cooling plate including a flow path for flowing a cooling medium;
  • a work machine equipped with a power converter having a power module attached to the cooling plate and thermally coupled to the cooling plate,
  • the flow path is disposed at a side of the first linear flow path for flowing the cooling medium in a first direction, and a second direction opposite to the first direction.
  • the second straight flow path for flowing the cooling medium through the first straight flow path, the first straight flow path, and the second straight flow path are changed, and the traveling direction of the cooling medium flowing through the first straight flow path is changed.
  • a curved flow path that flows into the second straight flow path With respect to the width direction of the first straight flow path, the power module passes through the center of curvature of the portion having the minimum curvature radius of the curved flow path and is based on a virtual straight line parallel to the first direction.
  • a work machine is provided that is mounted at a position biased toward the second straight flow path.
  • ⁇ Local temperature rise of the power module can be suppressed. Thereby, the reliability of a power converter device can be improved. As a result, the work machine can be continuously operated.
  • FIG. 1A is a plan view of the power conversion apparatus according to the first embodiment
  • FIGS. 1B and 1C are cross-sectional views taken along one-dot chain lines 1B-1B and 1C-1C in FIG. 1A, respectively.
  • FIG. 2 is a diagram illustrating a simulation result of the temperature distribution of the cooling plate and the flow velocity in the flow path of the power conversion device according to the first embodiment.
  • FIG. 3 is a diagram illustrating a simulation result of the temperature distribution of the cooling plate of the power converter according to the comparative example and the flow velocity in the flow path.
  • 4A and 4B are cross-sectional views of the power converter according to the second embodiment.
  • 5A is a plan view of the power conversion device according to the third embodiment, and FIG.
  • FIG. 5B is a cross-sectional view taken along one-dot chain line 5B-5B in FIG. 5A.
  • 6A and 6B are plan views of the power converter according to the fourth embodiment.
  • FIG. 7 is a plan view of the power converter according to the fifth embodiment.
  • 8A and 8B are cross-sectional views of a power conversion device according to the sixth embodiment and its modification, respectively.
  • FIG. 9 is a plan view of the work machine according to the seventh embodiment.
  • FIG. 10 is a side view of the work machine according to the seventh embodiment.
  • FIG. 11 is a side view of the work machine according to the eighth embodiment.
  • FIG. 1A is a plan view of the power conversion apparatus according to the first embodiment.
  • the power module 50 is fixed to the surface of the cooling plate 20 and is thermally coupled to the cooling plate 20.
  • the power module 50 is an electronic component such as an inverter circuit or a converter circuit, and includes a semiconductor element such as an insulated gate bipolar transistor (IGBT).
  • IGBT insulated gate bipolar transistor
  • a cooling channel 21 is formed inside the cooling plate 20.
  • the cooling flow path 21 includes a first straight flow path 21B connected to the cooling medium introduction pipe 23 and extending in a first direction (right direction in FIG. 1A).
  • a second straight channel 21D is formed on the side of the first straight channel 21B (upward in FIG. 1A).
  • the curved channel 21C continues from the downstream end of the first linear channel 21B to the upstream end of the second linear channel 21D.
  • the cooling medium that has flowed through the first straight flow path 21B changes the traveling direction in the curved flow path 21C and flows into the second straight flow path 21D.
  • a downstream end 21 ⁇ / b> E of the second straight channel 21 ⁇ / b> D is connected to the cooling medium discharge pipe 24.
  • the vicinity of the upstream end 21A of the first straight channel 21B is tapered so that the width increases toward the downstream.
  • the width W of the first straight channel 21B other than the tapered portion is constant.
  • the vicinity of the downstream end 21E of the second straight channel 21D is tapered so that the width increases toward the upstream.
  • the width of the second straight channel 21D other than the tapered portion is equal to the width W of the first straight channel 21B.
  • the width of the curved channel 21C is also equal to the width W of the first straight channel 21B.
  • the tapered portion functions as a runway until the turbulent flow becomes stable when the cross section of the flow path suddenly changes.
  • the length of the runway is preferably about 10 times the equivalent pipe diameter.
  • A is the cross-sectional area of the first straight channel 21B
  • Wp is the wet edge length of the first straight channel 21B (the length of the wall surface in the channel cross section).
  • the area of the region A2 where the second straight channel 21D and the power module 50 overlap is larger than the area of the region A1 where the first straight channel 21B and the power module 50 overlap.
  • the power module 50 is arranged so as to be biased toward the second straight flow path 21D with reference to an imaginary straight line passing through the center of curvature CC of the curved flow path 21C and parallel to the first direction. That is, the center line 50C of the power module 50 is shifted to the second straight flow path 21D side with respect to the virtual straight line IL passing through the center of curvature CC and parallel to the first direction.
  • the entire area of the second straight channel 21D overlaps the power module 50 in the width direction.
  • only a part of the first straight channel 21B overlaps the power module 50 in the width direction. More specifically, the path outside the first straight channel 21 ⁇ / b> B does not overlap the power module 50.
  • the power module 50 includes a metal base plate 51 and a semiconductor element 52 attached thereon.
  • the semiconductor element 52 is, for example, an IGBT or the like.
  • the semiconductor element 52 is sealed with a resin 53.
  • the power module 50 is fixed to the cooling plate 20 with the base plate 51 facing the cooling plate 20.
  • FIG. 1B shows an example in which two semiconductor elements 52 are incorporated in one power module 50, three or more semiconductor elements may be incorporated. Six semiconductor elements are incorporated in the power module 50 that drives the three-phase AC motor.
  • a cooling channel 21 is formed inside the cooling plate 20.
  • a first straight channel 21B and a second straight channel 21D appear in the cross section shown in FIG. 1B, and a curved channel 21C appears in the cross section shown in FIG. 1C.
  • the cross section of the cooling flow path 21 has a flat shape with the smallest dimension in the thickness direction of the cooling plate 20. That is, the dimension H in the thickness direction of the cooling channel 21 is smaller than the dimension W in the width direction.
  • the center line 50C of the power module 50 is shifted to the second straight flow path 21D side with respect to the curvature center CC.
  • a ridge-like convex portion 21F is formed on the upper surface of the cooling flow channel 21 (the surface closer to the surface to which the power module 50 is attached) along the flow direction of the cooling medium.
  • the cooling channel 21 can be formed by casting aluminum.
  • the radius of curvature is limited by the diameter of the pipe.
  • the radius of curvature of the curved flow path 21C can be freely set.
  • FIG. 2 shows a simulation result of the temperature distribution of the cooling plate 20 of the power converter according to the first embodiment and the flow velocity in the cooling flow path 21.
  • a region VL having a relatively low flow velocity, a region VM having a medium flow velocity, and a region VH having a high flow velocity are shown by changing the hatch interval.
  • isotherms T1 to T10 are indicated by broken lines at a temperature interval of 2 ° C. The temperature of the isotherm T1 is the lowest and the temperature of the isotherm T10 is the highest.
  • the flow velocity of the path that flows into the curved flow path 21C from the inner path in the first linear flow path 21B and goes to the outer path in the second straight flow path 21D is relatively fast.
  • the flow velocity of the path that leads from the outer path in the first straight flow path 21B to the outer path in the curved flow path 21C and the flow speed of the inner path in the second straight flow path 21D are relatively I understand that it is slow. In the region where the flow rate is low, the cooling capacity is relatively low, and in the region where the flow rate is high, the cooling capacity is relatively high.
  • FIG. 3 shows a simulation result of the temperature distribution of the cooling plate 20 of the power conversion device according to the comparative example and the flow velocity in the cooling flow path 21.
  • the shape of the cooling channel 21 of the comparative example is the same as that of the first embodiment.
  • the area of the region overlapping with the first straight flow path 21B is equal to the area of the region overlapping with the second straight flow path 21D.
  • the center of curvature CC is located on the center line 50C of the power module 50.
  • the power module 50 overlaps with the first straight flow path 21B in the entire width direction of the first straight flow path 21B.
  • Isothermal lines T1 to T15 are indicated by broken lines at a temperature interval of 2 ° C.
  • the temperature of the isotherm T1 is the lowest and the temperature of the isotherm T15 is the highest.
  • the temperature of the region corresponding to the outer path in the first straight channel 21B is high. This is due to the low cooling capacity of this part due to the slow flow rate.
  • Example 1 as shown in FIG. 2, the power module 50 is not disposed on the outer path in the first straight flow path 21B. For this reason, the remarkable raise of the temperature of the area
  • the flow velocity of the inner path in the second straight channel 21D is also slow, this part is close to the first straight channel 21B. For this reason, a decrease in the cooling capacity due to the cooling medium flowing in the inner path in the second straight flow path 21D is compensated by the cooling medium flowing in the inner path in the first straight flow path 21B.
  • the comparative example shown in FIG. 3 there is no flow path further outside the outer path in the first straight flow path 21 ⁇ / b> B. . Thereby, it is considered that the temperature of the corresponding portion in the outer path in the first straight channel 21B is remarkably increased.
  • a local temperature increase of the power module 50 can be suppressed and the reliability can be improved.
  • the edge of the power module 50 is disposed between the first straight channel 21B and the second straight channel 21D.
  • the cooling flow path 21 flat in the thickness direction is formed.
  • the area where the power module 50 and the cooling channel 21 overlap can be widened.
  • 60% or more of the power module 50 can be configured to overlap the cooling channel 21.
  • the area of the overlapping area is 60% or more of the area of the power module 50.
  • the radius of curvature is limited by the diameter of the pipe. For this reason, it is difficult to make the area of the power module 50 that overlaps the cooling pipeline 40% or more of the entire power module.
  • Example 2 4A and 4B are sectional views of the power converter according to the second embodiment.
  • the top view of the power converter device by Example 2 is the same as the top view of Example 1 shown to FIG. 1A.
  • FIGS. 1B and 1C are cross-sectional views taken along one-dot chain lines 1B-1B and 1C-1C in FIG. 1A, respectively.
  • Example 2 the convex portion 21F illustrated in FIGS. 1B and 1C is not formed, and the bottom surface and the top surface of the cooling channel 21 are both flat.
  • the center line 50C of the power module 50 is shifted to the second straight flow path 21D side with respect to the curvature center CC.
  • the relative positional relationship between the cooling flow path 21 and the power module 50 in a plan view is the same as the relationship of the first embodiment. For this reason, like Example 1, the local temperature rise of the power module 50 can be suppressed and reliability can be improved.
  • FIG. 5A is a plan view of the power conversion device according to the third embodiment.
  • differences from the power conversion apparatus according to the first embodiment illustrated in FIGS. 1A to 1C will be described, and description of the same configuration will be omitted.
  • Example 3 the first linear flow channel 21B is separated into an inner flow channel 21Ba and an outer flow channel 21Bb arranged outside the first flow channel 21B in the width direction.
  • the sum of the width W1 of the inner channel 21Ba and the width W2 of the outer channel 21Bb is the same as the width W of the second straight channel 21D.
  • the curved channel 21C is also separated into the inner channel 21Ca and the outer channel 21Cb.
  • the widths of the inner channel 21Ca and the outer channel 21Cb are the same as the widths of the inner channel 21Ba and the outer channel 21Bb, respectively.
  • the inner channel 21Ca and the outer channel 21Cb gradually approach toward the downstream and merge into one channel until reaching the upstream end of the second linear channel 21D.
  • the power module 50 overlaps the inner flow path 21Ba in the first straight flow path 21B, but does not overlap the outer flow path 21Bb.
  • a portion corresponding to the inner path in the outer flow path 21Bb may overlap the power module 50. Also in this case, the portion corresponding to the outer path in the outer flow path 21Bb does not overlap the power module 50.
  • the power module 50 is fixed to the cooling plate 20 with screws 55. Some screws 55 are disposed between the inner flow path 21Ba and the outer flow path 21Bb.
  • FIG. 5B shows a cross-sectional view taken along one-dot chain line 5B-5B in FIG. 5A.
  • the 1st linear flow path 21B and the 2nd linear flow path 21D are formed.
  • the first straight channel 21B is separated into an inner channel 21Ba and an outer channel 21Bb.
  • Some screws 55 are arranged between the inner flow path 21Ba and the outer flow path 21Bb. The screw 55 reaches a position deeper than the upper surface of the first straight channel 21B.
  • the upper surface of the cooling channel 21 may have a shape in which a convex portion 21F is formed as shown in FIGS. 1B and 1C, or may be flat as shown in FIGS. 4A and 4B.
  • Example 3 the power module 50 overlaps only a part of the first linear flow path 21B, and the path outside the first linear flow path 21B does not overlap the power module 50. For this reason, like Example 1, the local temperature rise of the power module 50 can be suppressed and reliability can be improved.
  • the cooling plate 20 interposed between the cooling flow path 21 and the power module 50 may be made as thin as possible. preferable. It is difficult to attach the screw 55 to the thinned portion.
  • a thick portion for inserting the screw 55 can be secured.
  • the interval between the inner channel 21Ba and the outer channel 21Bb needs to be sufficient to insert and fix the screw 55. However, in order not to disturb the flow of the cooling medium, it is preferable to set the distance between the two to 100 mm or less. Similarly to the first embodiment, the distance from the edge of the power module 50 to the outer edge of the outer flow path 21Bb of the first linear flow path 21B is preferably set to 1/4 or more of the width W.
  • FIG. 6A is a plan view of the power conversion device according to the fourth embodiment.
  • differences from the power conversion apparatus according to the first embodiment illustrated in FIGS. 1A to 1C will be described, and description of the same configuration will be omitted.
  • Example 1 only one curved channel 21C is arranged, but in Example 4, a plurality of curved channels are arranged. That is, the cooling flow path 21 has a meandering shape in which straight flow paths and curved flow paths are alternately continued.
  • the most upstream straight flow path 21B may be considered in association with the first straight flow path 21B of the first embodiment.
  • the power module 50 overlaps only a part of the most upstream linear flow channel 21B in the width direction of the cooling flow channel 21, and the outer path in the most upstream linear flow channel 21B overlaps the power module 50. Absent.
  • the entire area of the straight flow path other than the most upstream straight flow path overlaps the power module 50 in the width direction.
  • the center line 50C of the power module 50 is downstream of the virtual straight line IL passing through the center of curvature CC of the central curved flow path 21C and parallel to the longitudinal direction of the straight flow path 21B. It is shifted to the side of the straight flow path on the side.
  • Example 4 an outer path in the most upstream linear flow path 21 ⁇ / b> B exists outside the edge of the power module 50. For this reason, like Example 1, the local temperature rise of the power module 50 can be suppressed and reliability can be improved.
  • the edge of the power module 50 is between the most upstream linear flow path 21B and the adjacent straight flow path 21D (corresponding to the second straight flow path 21D of the first embodiment).
  • the power module 50 may be attached to the cooling plate 20 so as to be disposed.
  • the power module 50 passes through the center of curvature CC of the central curved flow path 21C and is parallel to the virtual straight line IL parallel to the longitudinal direction of the straight flow path 21B.
  • the center line 50C is shifted to the downstream straight channel side.
  • Example 5 In FIG. 7, the top view of the power converter device by Example 5 is shown. Hereinafter, differences from the power conversion apparatus according to the first embodiment illustrated in FIGS. 1A to 1C will be described, and description of the same configuration will be omitted.
  • the cooling channel 21 includes a first linear channel 21B, a curved channel 21C, and a second linear channel 21D.
  • the first straight channel 21B allows the cooling medium to flow in a first direction (upward in FIG. 7).
  • the second straight channel 21D is disposed on the side of the first straight channel 21B, and allows the cooling medium to flow in a direction opposite to the first direction (downward in FIG. 7).
  • the curved channel 21C connects the downstream end of the first linear channel 21B to the upstream end of the second linear channel 21D.
  • 21 C of curved flow paths are once curved in the direction away from 2nd linear flow path 21D as it leaves
  • the power module 50 is related to the width direction of the first linear channel 21B. It is attached at a position biased toward the second straight channel 21D. In the fifth embodiment, both the first straight flow path 21B and the second straight flow path 21D overlap the power module 50 in the entire area in the width direction.
  • the virtual straight line IL passing through the center of curvature CC of the curved flow path 21C and parallel to the longitudinal direction of the straight flow path 21B and the center line 50C of the power module 50 are shifted from each other, as in the first embodiment. Yes.
  • the curved flow path 21C is once curved outward, the flow velocity of the outer path in the first straight flow path 21B is not slow compared to the example shown in FIG. For this reason, the dispersion
  • FIG. 8A shows a cross-sectional view of the power converter according to the sixth embodiment.
  • the cooling plate 20 and the power module 50 have the same configuration as the power conversion device according to any one of the first to fifth embodiments.
  • a cooling channel 21 is formed in the cooling plate 20.
  • a curved channel 21C appears in the cross section shown in FIG.
  • a cooling medium discharge pipe 24 is connected to the cooling flow path 21.
  • the cooling medium introduction pipe 23 (FIG. 1A) does not appear in the cross section of FIG.
  • the cooling plate 20 and the power module 50 are accommodated in the housing 60.
  • the housing 60 includes a lower container 61 and an upper lid 62.
  • the cooling plate 20 is fixed to the bottom surface of the lower container 61.
  • the upper lid 62 closes the opening of the lower container 61.
  • the cooling medium introduction pipe 23 and the cooling medium discharge pipe 24 pass through the side surface of the lower container 61 and are led out to the outside of the housing 60.
  • cooling plate 20 and the lower container 61 may be integrally cast.
  • FIG. 9 is a plan view of an excavator as an example of the work machine according to the seventh embodiment.
  • An upper swing body 70 is attached to the lower traveling body 71 via a swing bearing 73.
  • the upper swing body 70 includes an engine 74, a main pump 75, a swing electric motor 76, an oil tank 77, a cooling fan 78, a seat 79, a power storage module 80, a motor generator 83, a motor generator inverter 90, A turning inverter 91 and a condenser converter 92 are mounted.
  • the engine 74 generates power by burning fuel.
  • the engine 74, the main pump 75, and the motor generator 83 transmit and receive torque to and from each other via the torque transmission mechanism 81.
  • the main pump 75 supplies pressure oil to a hydraulic cylinder such as the boom 82.
  • the motor generator 83 is driven by the power of the engine 74 to generate power (power generation operation).
  • the generated power is supplied to the power storage module 80, and the power storage module 80 is charged.
  • the motor generator 83 is driven by the electric power from the power storage module 80 and generates power for assisting the engine 74 (assist operation).
  • the oil tank 77 stores oil of the hydraulic circuit.
  • the cooling fan 78 suppresses an increase in the oil temperature of the hydraulic circuit. The operator sits on the seat 79 and operates the hybrid excavator.
  • a power conversion device is used for the motor generator inverter 90, the turning inverter 91, and the capacitor converter 92.
  • FIG. 10 shows a partially broken side view of the shovel according to the seventh embodiment.
  • An upper swing body 70 is mounted on the lower traveling body 71 via a swing bearing 73.
  • the upper swing body 70 includes a swing frame 70A, a cover 70B, and a cabin 70C.
  • the swivel frame 70A functions as a support structure for the cabin 70C and various components.
  • the cover 70B covers various components mounted on the turning frame 70A, for example, the power storage module 80, the condenser converter 92, and the like.
  • a seat 79 (FIG. 9) is accommodated in the cabin 70C.
  • the turning electric motor 76 (FIG. 9) turns the turning frame 70A to be driven clockwise or counterclockwise with respect to the lower traveling body 71.
  • a boom 82 is attached to the upper swing body 70.
  • the boom 82 swings up and down with respect to the upper swing body 70 by a hydraulically driven boom cylinder 107.
  • An arm 85 is attached to the tip of the boom 82.
  • the arm 85 swings in the front-rear direction with respect to the boom 82 by an arm cylinder 108 that is hydraulically driven.
  • a bucket 86 is attached to the tip of the arm 85.
  • the bucket 86 swings in the vertical direction with respect to the arm 85 by a hydraulically driven bucket cylinder 109.
  • the power storage module 80 is mounted on the turning frame 70 ⁇ / b> A via a power storage module mount 95 and a damper (vibration isolation device) 96.
  • the capacitor converter 92 is mounted on the turning frame 70 ⁇ / b> A via a converter mount 97 and a damper 98.
  • Cover 70 ⁇ / b> B covers power storage module 80.
  • the turning electric motor 76 (FIG. 9) is driven by the electric power supplied from the power storage module 80. In addition, the turning electric motor 76 generates regenerative electric power by converting kinetic energy into electric energy.
  • the power storage module 80 is charged by the generated regenerative power.
  • FIG. 11 is a partially cutaway side view of a cargo handling work vehicle (forklift) as an example of the work machine according to the eighth embodiment.
  • the cargo handling work vehicle according to the eighth embodiment includes a fork 111, wheels 112, an instrument panel 113, a handle 114, a lever 115, and a seat 116.
  • a traveling motor inverter 120 and a condenser converter 121 are mounted on the chassis via a damper or the like. Any one of the power conversion devices of the first to sixth embodiments is used for the inverter 120 for the traveling motor and the converter 121 for the electric storage device.
  • the travel motor inverter 120 supplies power to the travel motor.
  • the capacitor converter 121 charges and discharges the capacitor.
  • the driver gets on the seat 116 and operates the handle 114, the plurality of levers 115, the accelerator pedal, the brake pedal, and other various switches.
  • operations such as raising and lowering the fork 111, advancing and retreating the cargo handling work vehicle, and turning right and left are performed.
  • By combining these operations it is possible to load and unload packages and carry them.
  • the power conversion device Since the power conversion device according to any one of the first to sixth embodiments is used, the local increase in the temperature of the power module in the inverter for driving motor 120 and the converter for capacitor 121 is suppressed, and the reliability is improved. Can do.
  • the power module 50 (for example, FIGS. 1A to 1C) included in the power converters according to the first to sixth embodiments described above has only one phase of the three-phase AC motor (one of the U phase, the V phase, and the W phase).
  • three power converters may be prepared corresponding to the U phase, the V phase, and the W phase.
  • a three-phase power converter for a three-phase AC motor can be configured.
  • a configuration in which a plurality of (for example, three) power converters including the power module 50 and the cooling plate 20 shown in the first to sixth embodiments are stacked in the vertical direction (thickness direction of the cooling plate 20) may be employed. Good.
  • Example 1 Based on the above-mentioned Example 1 to Example 8, the invention described in the following supplementary notes is disclosed.
  • a cooling plate including a flow path for flowing a cooling medium; A power module attached to the cooling plate and thermally coupled to the cooling plate; The flow path is disposed at a side of the first linear flow path for flowing the cooling medium in a first direction, and a second direction opposite to the first direction.
  • the second straight flow path for flowing the cooling medium through the first straight flow path, the first straight flow path, and the second straight flow path are changed, and the traveling direction of the cooling medium flowing through the first straight flow path is changed.
  • a curved flow path that flows into the second straight flow path, The power conversion device, wherein an area of a region where the second straight channel and the power module overlap is larger than an area of a region where the first straight channel and the power module overlap.
  • the width of the first straight flow path is equal to the width of the second straight flow path, and the second straight flow is related to the width direction of the first straight flow path and the second straight flow path.
  • the power conversion device according to attachment 2 wherein an entire area of the road overlaps with the power module, but at least a part of the first straight flow path does not overlap with the power module in the width direction.
  • the first straight channel is separated into an outer channel and an inner channel with respect to the width direction, and the outer channel and the inner channel are the second linear channel in the curved channel. 3.
  • Appendix 4 The power conversion device according to any one of appendices 1 to 3, wherein a ridge-like convex portion along a flow direction of the cooling medium is formed on an inner surface of the flow path on a side where the power module is attached. .
  • a cooling plate including a flow path for flowing a cooling medium; A power module attached to the cooling plate and thermally coupled to the cooling plate; The flow path is disposed at a side of the first linear flow path for flowing the cooling medium in a first direction, and a second direction opposite to the first direction.
  • the second straight flow path for flowing the cooling medium through the first straight flow path, the first straight flow path, and the second straight flow path are changed, and the traveling direction of the cooling medium flowing through the first straight flow path is changed.
  • a curved flow path that flows into the second straight flow path With respect to the width direction of the first straight flow path, the power module passes through the center of curvature of the portion having the minimum curvature radius of the curved flow path and is based on a virtual straight line parallel to the first direction.
  • the power converter attached to the position biased toward the second straight flow path.
  • Cooling plate 21 Flow path 21A Upstream end 21B First straight flow path (most upstream straight flow path) 21Ba Inner channel 21Bb Outer channel 21C Curved channel 21D Second linear channel 21E Downstream end 21F Convex portion 21G Most downstream linear channel 23 Cooling medium introduction pipe 24 Cooling medium discharge pipe 50 Power module 51 Base plate 52 Semiconductor element 53 Sealing resin 55 Screw 60 Housing 61 Lower container 62 Upper lid 70 Upper turning body 70A Turning frame 70B Cover 70C Cabin 71 Lower traveling body 73 Turning bearing 74 Engine 75 Main pump 76 Turning electric motor 77 Oil tank 78 Cooling fan 79 Seat 80 Power storage module 81 Torque transmission mechanism 82 Boom 83 Motor generator 85 Arm 86 Bucket 90 Motor generator inverter 91 Turning inverter 92 Capacitor converter 95 Storage module mount 96 Damper (anti-vibration device) 97 Mount for converter 98 Damper 107 Boom cylinder 108 Arm cylinder 109 Bucket cylinder 111 Fork 112 Wheel 113 Instrument panel 114

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne une machine caractérisée en ce que des passages d'écoulement destinés à un agent de refroidissement sont formés dans une plaque de refroidissement. Un module de puissance est fixé à la plaque de refroidissement et est lié thermiquement à la plaque de refroidissement. Les passages d'écoulement comprennent : un premier passage d'écoulement rectiligne qui fait circuler l'agent de refroidissement dans une première direction ; un deuxième passage d'écoulement rectiligne disposé sur le côté du premier passage d'écoulement rectiligne, qui fait circuler l'agent de refroidissement dans une deuxième direction opposée à la première direction ; et un passage d'écoulement curviligne relié au premier passage d'écoulement rectiligne et au deuxième passage d'écoulement rectiligne, qui modifie la direction de progression de l'agent de refroidissement ayant parcouru le premier passage d'écoulement rectiligne et lui fait longer le deuxième passage d'écoulement rectiligne. L'aire de la région où le deuxième passage d'écoulement rectiligne et le module de puissance se recouvrent est supérieure à l'aire de la région où le premier passage d'écoulement rectiligne et le module de puissance se recouvrent. Un dispositif de conversion de puissance comprenant la plaque de refroidissement et le module de puissance est monté dans une machine de travail.
PCT/JP2012/073017 2011-09-15 2012-09-10 Machine de travail Ceased WO2013039026A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013533653A JP6281840B2 (ja) 2011-09-15 2012-09-10 作業機械

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Application Number Priority Date Filing Date Title
JP2011-201922 2011-09-15
JP2011201922 2011-09-15

Publications (1)

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WO2013039026A1 true WO2013039026A1 (fr) 2013-03-21

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PCT/JP2012/073017 Ceased WO2013039026A1 (fr) 2011-09-15 2012-09-10 Machine de travail

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Country Link
JP (1) JP6281840B2 (fr)
WO (1) WO2013039026A1 (fr)

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CN107567239A (zh) * 2017-07-24 2018-01-09 广东美的暖通设备有限公司 散热组件及制冷设备
US10362712B2 (en) 2015-12-22 2019-07-23 Fujitsu Limited Heat receiver, cooling unit, and electronic device

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JP2008091700A (ja) * 2006-10-03 2008-04-17 Toyota Motor Corp 半導体装置
JP2010027963A (ja) * 2008-07-23 2010-02-04 Shindengen Electric Mfg Co Ltd 冷却器
JP2010272870A (ja) * 2009-05-22 2010-12-02 Ls Industrial Systems Co Ltd 水冷式クーラー及びこれを備えるインバータ

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WO2000016397A1 (fr) * 1998-09-16 2000-03-23 Hitachi, Ltd. Dispositif electronique
JP2008091700A (ja) * 2006-10-03 2008-04-17 Toyota Motor Corp 半導体装置
JP2010027963A (ja) * 2008-07-23 2010-02-04 Shindengen Electric Mfg Co Ltd 冷却器
JP2010272870A (ja) * 2009-05-22 2010-12-02 Ls Industrial Systems Co Ltd 水冷式クーラー及びこれを備えるインバータ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10362712B2 (en) 2015-12-22 2019-07-23 Fujitsu Limited Heat receiver, cooling unit, and electronic device
CN107567239A (zh) * 2017-07-24 2018-01-09 广东美的暖通设备有限公司 散热组件及制冷设备

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JP6281840B2 (ja) 2018-02-21

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