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WO2014111971A1 - Dispositif de transmission sans contact - Google Patents

Dispositif de transmission sans contact Download PDF

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Publication number
WO2014111971A1
WO2014111971A1 PCT/JP2013/000170 JP2013000170W WO2014111971A1 WO 2014111971 A1 WO2014111971 A1 WO 2014111971A1 JP 2013000170 W JP2013000170 W JP 2013000170W WO 2014111971 A1 WO2014111971 A1 WO 2014111971A1
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WO
WIPO (PCT)
Prior art keywords
coil
winding portion
winding
signal
transmission device
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/JP2013/000170
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English (en)
Japanese (ja)
Inventor
修平 ▲高▼櫻
俊和 向井
昇 奥山
正樹 儀間
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.)
MIE ELECTRONICS CO Ltd
Original Assignee
MIE ELECTRONICS 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 MIE ELECTRONICS CO Ltd filed Critical MIE ELECTRONICS CO Ltd
Priority to JP2014557176A priority Critical patent/JPWO2014111971A1/ja
Priority to PCT/JP2013/000170 priority patent/WO2014111971A1/fr
Publication of WO2014111971A1 publication Critical patent/WO2014111971A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Definitions

  • the present invention relates to a noncontact transmission device that enables transmission of power and electrical signals between members that are relatively displaced by mutual induction between coil members, and in particular, a plurality of pairs of coil members that cause mutual induction are provided.
  • the present invention relates to a contactless transmission apparatus.
  • a joint of a robot a rotating part such as an ultrasonic motor or an ultrasonic spindle device, a connecting part between an electric car and a charging device, a main body and a tool of a processing machine
  • Contactless transmission devices are used to enable transmission of power and electrical signals between members that are relatively displaced, such as connection parts of the above.
  • the non-contact type transmission apparatus has a pair of coil members between members which are relatively displaced. And by using mutual induction between the two coil members, it is possible to transmit power and electrical signals in a contactless manner.
  • Patent Document 3 JP-A-11-354348
  • Patent Document 4 Japanese Patent Application Laid-Open No. 11-313491 proposes a structure in which a nonmagnetic material is interposed between coil members assembled on a concentric shaft on a common core member.
  • Patent Document 5 provides a noise suppressing coil member on the outer periphery of the core member and is produced in a signal coil.
  • Patent Document 5 proposes a contactless transmission system that reduces noise emf by mutual induction from noise suppression coils.
  • the above-mentioned invention by the applicant makes it possible to arrange the power coil member and the signal coil member closer to each other while suppressing the generation of noise, and also the magnetic path and the signal of the power coil member. Since a gap portion for blocking the magnetic path of the coil member and a nonmagnetic material are not required, the use of the core member does not lead to an increase in the size of the core member, thereby enabling significant improvement in space efficiency. It was a thing.
  • the present invention has been made against the background described above, and the problem to be solved is to allow a plurality of coil members to be closer to each other while reducing the influence of magnetic flux from other coil members with a simple configuration. It is an object of the present invention to provide a contactless transmission device having a novel structure which can be disposed in a space efficient manner.
  • a first aspect of the present invention comprises a pair of first coil members opposed to each other so as to be displaceable relative to each other, and a pair of second coil members opposed to each other so as to be displaceable relative to each other.
  • a noncontact transmission device for transmitting power or an electrical signal between first coil members of the first pair and transmitting an electrical signal between the pair of second coil members by mutual induction.
  • a specific coil winding path is adopted as the second coil member in which the current supply directions for the common magnetic field are opposite to each other.
  • the magnitude of noise electromotive force It is possible to generate a corresponding reverse electromotive force.
  • the change in noise electromotive force generated in the second coil member is monitored by the power supply control device, and the voltage applied to the second coil member for noise reduction is changed according to the change in noise electromotive force. It is possible to obtain an excellent noise suppression effect with an extremely simple configuration without requiring a high degree of control such as the above.
  • the second coil member can be disposed at a position close to each other in a space efficient manner, and the contactless transmission device can be made compact.
  • the electrical signal can be transmitted more quickly. That is, for example, in the case of wireless communication, in general, multistage processing is required, in which a received electric signal is detected and then amplified and noise is removed to reproduce the signal, which takes time.
  • multistage processing in which a received electric signal is detected and then amplified and noise is removed to reproduce the signal, which takes time.
  • the noise reduction effect to the structure of the second coil member itself, it becomes possible to transmit the electric signal more quickly, and the real time property of the signal transmission can be improved.
  • the relative displacement directions of the pair of first coil members and the pair of second coil members are not limited in any way, and the noncontact transmission device of the present invention can be widely applied to various machines.
  • the non-contact transmission device of the present invention may be adopted for the rotating part of the ultrasonic spindle, and a pair of coil members may be provided so as to be relatively rotatable.
  • the non-contact type transmission apparatus of the invention may be employed so that both coil members can be separated from each other, and some positional deviation can be tolerated when connecting.
  • first coil member and the second coil member disposed on the same side are not limited.
  • first coil member and the second coil member may be disposed concentrically or eccentrically.
  • first coil member and the second coil member may be disposed completely or partially in piles.
  • the second coil member You may arrange
  • a second aspect of the present invention is the contactless transmission apparatus according to the first aspect, wherein the coil winding paths generating the opposite electromotive forces are wound in opposite directions to each other. It is comprised including a winding part and a 2nd winding part.
  • the first winding portion and the second winding portion are wound in opposite directions to each other.
  • the winding direction of the first winding portion and the second winding portion wound in opposite directions means the winding direction with respect to the center of the first coil member.
  • the number of turns of the first winding portion and the second winding portion is arbitrarily set in consideration of the electromotive force generated in the first winding portion and the electromotive force generated in the second winding portion. Are set so that electromotive forces of equal magnitude in opposite directions are generated in the first winding portion and the second winding portion with respect to the common magnetic field. Therefore, the number of turns of the first winding portion and the number of turns of the second winding portion may be different from each other.
  • the first winding portion and the second winding portion are formed on the same plane.
  • the second coil member can be formed thin.
  • the second coil member can be formed flat, it is possible to facilitate the arrangement operation such as overlapping the first coil member.
  • the first winding portion and the second winding portion oppose each other with the first coil member interposed therebetween in the axial direction. It is formed on the side.
  • first winding portion and the second winding portion are formed on different planes. Therefore, a larger formation space can be secured in each of the first winding portion and the second winding portion, and the setting freedom of the number of turns of the first winding portion and the second winding portion Can be improved.
  • the coil winding of the first coil member and the coil winding of the second coil member are overlapped. Are arranged.
  • the magnetic flux from one coil member affects the other coil member. It was difficult.
  • according to the present invention by adopting a specific coil winding path for the second coil member, it is possible to reduce the influence from the first coil member. It can arrange
  • overlap in this aspect is disposed at a position where the coil winding of the first coil member and the coil winding of the second coil member overlap in the projection view in the axial direction of these coils.
  • the coil windings of both coil members are not in contact with each other, and it is not said that the coil windings of both coil members are in contact.
  • the coil winding of the first coil member and the coil winding of the second coil member may be overlapped over substantially the entire circumference, or may be partially overlapped. .
  • the core member according to any one of the second to fifth aspects, wherein the core member is made of a magnetically permeable material having a housing recess opened at one end face in the axial direction.
  • the at least one first coil member and the second coil member may be accommodated in the same accommodation recess.
  • the transmission efficiency of the power and the electric signal can be improved.
  • the second coil member can be disposed close to the first coil member while reducing the influence of the magnetic flux by the first coil member, the first coil member and The second coil member can be housed in the same receiving recess formed in the core member. Thereby, excellent space efficiency can be obtained.
  • the core member in this aspect may be provided only in the side arrange
  • various shapes are employable as a core member in this aspect, For example, the cylindrical shape of the bottomed cylinder in which the accommodation recess opened in one side was formed, and the plate shape in which the accommodation recess was formed in notch shape Or the like.
  • the receiving recess may partially receive the first coil member and the second coil member.
  • the first coil member and the second coil member may be accommodated so as to overlap each other in the same accommodation recess of the core member, and the sizes of the first coil member and the second coil member may be different from each other. The coils may be accommodated so as not to overlap each other.
  • a seventh aspect of the present invention is the one according to the sixth aspect, wherein a groove as the accommodation recess is formed in the core member.
  • the receiving recess has a groove shape, so that the inner wall and the outer wall of the groove are disposed on the inner and outer sides of the first coil member and the second coil member received in the receiving recess. It will be set up. Thereby, the density of the magnetic flux by the first coil member and the second coil member can be more effectively enhanced by using both the inner wall and the outer wall of the groove.
  • the first winding portion and the second winding portion of the second coil member are formed on the outside and the inside of the second coil member, the first winding portion and the second winding portion are formed.
  • a plurality of grooves may be provided in the core member. Therefore, for example, by adopting a core member in which two grooves open at one side are formed like an E-shaped plate shape, an annular first coil member and a second coil straddling two grooves The members may be partially accommodated.
  • An eighth aspect of the present invention is the one according to the seventh aspect, wherein the separation distance between the first winding portion and the second winding portion is on both sides of the second coil member.
  • the distance between the groove and the wall of the groove is greater than the distance between the groove and the wall.
  • the first winding portion of the second coil member is disposed close to one of the outer wall and the inner wall of the groove, and the second winding portion is disposed on the other of the outer wall and the inner wall.
  • the first winding portion and the second winding portion are disposed close to each other, and are disposed closer to one of the wall portions of the groove portion than the other winding portion.
  • a pot-shaped core having a circumferential groove as the groove extending in the circumferential direction is used as the core member. is there.
  • the first coil member and the second coil member are accommodated in the circumferential groove of the pot core.
  • the outer side of the first coil member and the second coil member is surrounded by the outer wall of the circumferential groove over the entire circumference, so it is disposed in the vicinity of the noncontact transmission device particularly when transmitting an electrical signal. It is possible to reduce disturbance due to magnetism from a motor or the like.
  • the coil winding path for generating the opposite electromotive force is accommodated in the accommodation recess.
  • a second coil member is configured to include an outer peripheral winding portion extended to the outside of the core member and wound around the outer peripheral surface of the core member.
  • the second coil member is extended to the outside of the core member, and the outer peripheral winding portion is formed on the outside of the core member.
  • the outer periphery of the second coil member in the radial direction is circumferentially provided in the second coil member.
  • a small loop portion having an outer winding portion partially extending in a direction and an inner winding portion folded back from the outer winding portion and partially extending circumferentially inward of the second coil member in the radial direction Are formed along the circumference, and the first winding portion is formed by the outer winding portion of each small loop portion, and the inner winding portion of each small loop portion is formed.
  • the second winding portion is formed.
  • coil winding paths that generate electromotive forces in opposite directions are formed to include a plurality of small loop portions formed side by side along the circumference. And according to this aspect, the number of turns can be adjusted for each small loop part, and the reduction effect of the noise electromotive force can be adjusted with higher accuracy.
  • the strength of the second coil member can be improved, and the shape stability can be improved.
  • the outside of the second coil member is covered with a nonmagnetic material.
  • the transmission of the electric signal by the second coil member can be protected from the influence of the external magnetism, and the transmission quality can be improved.
  • this aspect can be used in combination with the sixth aspect etc., and the magnetic flux leaks from the core member by covering the outside of the core member housing the second coil member with a nonmagnetic material. Can be obtained to obtain better transmission efficiency.
  • a nonmagnetic material an aluminum alloy, a copper alloy, a titanium alloy, a nickel alloy, ceramics, a synthetic resin material etc. may be employ
  • the pair of first coil members and the pair of second coil members are disposed so as to be displaced relative to each other, and at least one of the second coil members is a first coil.
  • the coil winding paths are formed to generate electromotive forces opposite to each other.
  • the noise electromotive force generated in the second coil member due to the influence of the first coil member can be reduced with an extremely simple configuration.
  • the transmission quality can be improved, and the second coil member can be disposed in the vicinity of the first coil member, thereby achieving further downsizing.
  • the disassembled perspective view of the non-contact-type transmission apparatus as 1st embodiment of this invention The front view which shows the coil for signals as a model. Explanatory drawing which shows the longitudinal cross-section of the non-contact-type transmission apparatus shown in FIG. 1, and the circuit structure connected to this.
  • the front view of the coil head shown in FIG. Explanatory drawing for demonstrating the relative displacement direction of a coil head. It is explanatory drawing for demonstrating the direction of the induced current which arises in the coil for signals, (a) shows at the time of transmission of an electric signal, (b) shows the time of noise generation.
  • FIG. 1 shows a noncontact transmission apparatus 10 according to a first embodiment of the present invention in a disassembled state.
  • the noncontact transmission device 10 is configured to include a pair of coil heads 12 a and a coil head 12 b disposed to face each other.
  • a holding plate 34 to which signal coils 16 a and 16 b described later are fixed is seen through.
  • the coil head 12a has a structure in which a power coil 14a as a first coil member and a signal coil 16a as a second coil member are accommodated in a pot core 18a as a core member.
  • the coil head 12b has a structure in which the power coil 14b as the first coil member and the signal coil 16b as the second coil member are accommodated in the pot core 18b as the core member. . Since these coil heads 12a and 12b have substantially the same structure, hereinafter, the coil head 12a will be described as an example, and the coil head 12b will be described by giving the same reference numerals in the drawings. I omit it.
  • the power coil 14a is formed by winding a lead wire 20a as a coil winding made of copper or the like in a circle a predetermined number of times.
  • the size and the number of turns of the power coil 14a can be arbitrarily set in consideration of the size of the power to be transmitted, the relative position with the opposing power coil 14b, and the like.
  • the power coil 14a in the present embodiment is formed by being wound around a substantially cylindrical bobbin 22 formed of a synthetic resin or the like, the bobbin 22 is not necessarily required.
  • the signal coil 16a is formed of a lead wire 24a as a coil winding made of copper or the like, as shown as a model in FIG.
  • the signal coil 16a is formed in a circular shape as a whole, and is wound in the radially outward first winding portion 26 and in the direction opposite to the first winding portion 26 in the radial direction.
  • a second winding portion 28 is formed by a single lead 24a.
  • the outer wound portion 30a is formed by the lead wire 24a being approximately half-turned from point A in FIG. 2, the outer wound portion 30a is bent inward in the radial direction, and inward in the radial direction.
  • the inner winding portion 32a is formed by rotating approximately in a direction opposite to the outer winding portion 30a (counterclockwise in FIG. 2).
  • the lead wire 24a is further bent outward in the radial direction from the inner winding portion 32a, and is semicircularly rotated on the outer side in the radial direction opposite to the inner winding portion 32a (clockwise in FIG. 2)
  • the outer winding portion 30b is formed by returning.
  • the outer winding portion 30c, the inner winding portion 32b, and the outer winding portion 30d are sequentially formed by repeating this.
  • the first winding portion 26 is formed by the outer winding portions 30a to 30d
  • the second winding portion 28 is formed by the inner winding portions 32a and 32b.
  • the lead wire 24 a is turned around in a half turn around the outside and then turned back inside, and is turned around in a reverse direction on the inside.
  • the first winding portion 26 wound in one direction (clockwise in FIG. 2) is formed on the outside of the signal coil 16 a by further folding back to the outside and half-turning the remaining outside.
  • a second winding portion 28 wound in the opposite direction counterclockwise in FIG.
  • the lead wire 24a includes the first winding portion 26 and the second winding portion 28. Each of them may be overlapped.
  • the signal coil 16a of the present embodiment is formed in a circular shape having substantially the same size as the power coil 14a.
  • the first winding portion 26 and the second winding portion 28 are respectively wound in a substantially circular shape, and are formed on the same plane and concentric axes.
  • the signal coil 16a maintains its winding shape by fixing the lead wire 24a to the holding plate 34 made of synthetic resin or the like in a thin, annular plate shape by bonding or the like. It is supposed to be However, the holding plate 34 is not necessarily required.
  • the power coil 14a and the signal coil 16a are accommodated in the pot core 18a.
  • the pot core 18a is made of, for example, a magnetically permeable material such as iron, silicon steel, permalloy, or ferrite.
  • the pot core 18a has a cylindrical shape in which a central hole 36 extending on the central axis is formed, and a circumferential groove 38 is formed open in one of the axial directions and extending around the central axis, The circumferential groove 38 is a receiving recess for receiving the power coil 14a and the signal coil 16a.
  • the pot core 18a may be an integrally molded product, for example, three components of the outer wall 40, the inner wall 42, and the bottom wall of the circumferential groove 38. May be made of a plurality of parts formed by bonding or the like. Furthermore, for example, the outer wall 40 may be divided into a plurality of parts in the circumferential direction, or the forming member of the pot core 18a may be disposed close to the power coil 14a or the signal coil 16a.
  • the coil head 12a is formed by accommodating the power coil 14a and the signal coil 16a in the circumferential groove 38.
  • the potting core 18a is housed in the order of the power coil 14a and the signal coil 16a, but the housing order of the potting core 18a may be reversed.
  • the power coil 14a and the signal coil 16a overlap each other in the axial direction (vertical direction in FIG. 3) with the lead wires 20a and 24a on substantially concentric axes. It is accommodated in the circumferential groove 38.
  • the first winding portion 26 and the second winding portion 28 of the signal coil 16a can be used for power.
  • the coils 14a are wound in opposite directions with respect to the center of the coil 14a.
  • the power coil 14a and the signal coil 16a are disposed with a gap therebetween, and the lead wires 20a, 20g of each other. The contact of 24a is prevented.
  • the signal coil 16 a is accommodated in the circumferential groove 38 so that the first winding portion 26 of the signal coil 16 a is on the outer wall 40 side of the circumferential groove 38 as a second winding.
  • the line portion 28 is disposed on the inner wall 42 side of the circumferential groove 38.
  • the first winding portion 26 and the second winding portion 28 are spaced apart, and the first winding portion 26 and the second winding portion 28 in the radial direction of the pot core 18a.
  • the noncontact transmission device 10 is configured to include such a pair of coil heads 12a and 12b.
  • the coil heads 12a and 12b are members capable of relative displacement, such as joints of a robot, a rotating portion of an ultrasonic spindle, and a connecting portion between a main body of a processing machine and a tool.
  • the end faces on the opening side of the circumferential grooves 38, 38 of the pot-shaped cores 18a, 18b are disposed to face each other on substantially concentric axes.
  • any direction can be set according to the relative displacement direction of the members 44a and 44b, and X, Y, and Z can be set as shown in FIG.
  • a power supply circuit 46 for supplying DC power is connected to the power coil 14a of the coil head 12a via the inverter 48, and to the signal coil 16a.
  • a control circuit 50 such as a CPU is connected via a communication circuit 52 provided with an inverter.
  • various loads 54 such as a motor and a circuit board driven by a DC power supply are connected to the power coil 14b of the coil head 12b via the rectification and stabilization circuit 56, and the signal coil 16a
  • a control circuit 58 such as a CPU that controls the operation of the load 54 is connected via a communication circuit 60 provided with an inverter.
  • Such coil heads 12a and 12b can transmit power without contact between the power coil 14a and the power coil 14b, which are disposed opposite to each other, and the signal coils 16a disposed opposite to each other. Between the signal coil 16b and the signal coil 16b, transmission of an electrical signal is enabled without contact.
  • the DC voltage of the power supply circuit 46 is converted into a high frequency voltage by the inverter 48 and supplied to the power coil 14a. Then, the high frequency voltage is supplied to the power coil 14a, thereby penetrating the power coil 14a and generating a magnetic flux that changes according to the output frequency.
  • the magnetic flux enters the opposing pot core 18 b from the pot core 18 a and is linked to the power coil 14 b.
  • the power coil 14a and the power coil 14b are electromagnetically coupled, and an induced electromotive force is generated in the power coil 14b due to mutual induction.
  • the high frequency voltage supplied to the power coil 14a can be extracted from the power coil 14b.
  • the high frequency voltage extracted from the power coil 14 b is converted into a DC voltage by the rectification and stabilization circuit 56, and is then supplied as a drive voltage to the load 54 driven by the DC voltage. In this way, transmission of power is possible between the power coil 14a and the power coil 14b in a contactless manner, and power can be transmitted between the relatively displaced members 44a and 44b. It is assumed.
  • the electric signal generated by the control circuit 50 is input to the communication circuit 52, and the communication circuit 52 converts the electric signal into a high frequency voltage. It is superimposed.
  • the modulation method of the electric signal is not limited at all.
  • analog modulation such as amplitude modulation (AM), frequency modulation (FM), phase modulation (PM), phase shift keying (PSK), two-phase phase
  • Various modulation schemes may be employed such as shift keying (Manchester coding, BPSK), digital modulation such as frequency shift keying (FSK), pulse modulation such as pulse width modulation (PWM).
  • the high frequency voltage on which the electric signal is superimposed is supplied from the communication circuit 52 to the signal coil 16a, thereby penetrating the signal coil 16a to generate a magnetic flux that changes in accordance with the output frequency. It is linked with the opposing signal coil 16b. Thereby, an induced electromotive force is generated in the signal coil 16b due to mutual induction with the signal coil 16a, and a high frequency voltage on which the electrical signal is superimposed is taken out from the signal coil 16b.
  • the electrical signal superimposed on the high frequency voltage extracted from the signal coil 16b is transmitted from the high frequency voltage by the communication circuit 60 to the control circuit 58. In this manner, transmission of an electrical signal is enabled in a contactless state between the signal coil 16a and the signal coil 16b, and transmission of an electrical signal between the relatively displaced members 44a and 44b. Is made possible.
  • the non-contact type transmission device 10 of the present embodiment in each of the signal coils 16a and 16b, the first winding portion 26 and the second winding portion 28 wound in opposite directions to each other are formed.
  • the electric signal can be transmitted while reducing the noise electromotive force induced in the signal coils 16a and 16b by the magnetic flux generated by the energization of the power coil 14a.
  • the current iso and the current isi flow in the signal coil 16 a, so that the magnetic flux b i is generated inside the second winding portion 28, between the second winding portion 28 and the first winding portion 26.
  • the magnetic flux b c is generated on the outside of the first winding portion 26 and the magnetic flux b o is generated.
  • the current iso and the current i si are viewed from the outside of the lead wire 24a. It flows in the opposite direction to each other.
  • magnetic lines of flux b i and the magnetic flux b o whereas towards the same direction, magnetic lines of flux b c is the direction opposite to the magnetic lines of flux b i and the magnetic flux b o.
  • the first winding portion 26 second winding portions 28 are spaced apart and there is a distance from the second winding portion 28 to the outside of the first winding portion 26 and from the first winding portion 26 to the inside of the second winding portion 28 from, these magnetic flux rb o, rb i is, the magnetic flux b o, small enough not to affect almost b i.
  • the pot-type core 18 a is used, and the first winding portion 26 is disposed close to the outer wall 40 of the pot-type core 18 a and the second winding portion 28 is disposed close to the inner wall 42. Therefore, by focusing the magnetic field lines generated from the first winding portion 26 on the outer wall 40, the influence from the second winding portion 28 can be further mitigated and the second winding portion 28 arises. By focusing the magnetic field lines on the inner wall 42, it is possible to further reduce the influence from the first winding portion 26.
  • an induced current iro is generated in the first winding portion 26 of the opposing signal coil 16b by the magnetic fluxes b i , b c and b o generated by the signal coil 16a, and the second An induced current iri is generated in the winding portion 28.
  • the induced currents iro and iri flow in the same direction in the lead wire 24b of the signal coil 16b and are not canceled out. Thus, it is possible to transmit an electrical signal from the signal coil 16a to the signal coil 16b.
  • FIG. 6B and FIG. 7B as a model, when an alternating voltage is applied to the power coil 14a, the magnetic flux B i inside the power coil 14a and the magnetic flux B o outside the power coil 14a. Is born.
  • the direction of the magnetic field lines of the magnetic flux B i and the direction of the magnetic field lines of the magnetic flux B o are opposite to each other.
  • the magnetic fluxes B i and B o pass through the inside of the second winding portion 28 and the outside of the first winding portion 26 in each of the signal coils 16 a and 16 b.
  • the induced current i no as a noise current in the first winding portion 26
  • the induced current i ni as a noise current to the second winding portions 28
  • the magnetic flux B i and the magnetic flux B o are directed in opposite directions from each other on both sides of the first winding portion 26 and the second winding portion 28
  • the induced current ino and the induced current ini are for signals
  • the lead wires 24b of the coil 16b are viewed from the outside, they flow in the same direction.
  • the first winding portion 26 and the second winding portion 28 are wound in opposite directions to each other, the induced current ino and the induced current ini are opposite to each other in the lead wire 24b.
  • the noise electromotive force can be similarly reduced in the signal coil 16a, and in the present embodiment, the electric signal It is possible to reduce noise on both the transmitting side (the signal coil 16a) and the receiving side (the signal coil 16b).
  • the pot-shaped cores 18a and 18b are used to focus the lines of magnetic force generated from the first winding portion 26 and the second winding portion 28 of the signal coil 16a on the outer wall 40 and the inner wall 42, respectively.
  • the magnetic flux density of the outside of the first winding portion 26 and the inside of the second winding portion 28 of the coil 16b can be increased, and the first winding portion 26 and the second winding of the signal coil 16b can be increased.
  • the induced current i ro the induced current i ri more effectively Namaze occupied it is possible, it is possible to perform transmission more stable electrical signals.
  • noise electromotive force generated due to the influence of the power coil 14a can be reduced in the signal coils 16a and 16b.
  • it is an extremely simple configuration without providing any special control device and a coil member for noise suppression separately. Transmission quality of electrical signals can be improved.
  • the electromotive force in the reverse direction is generated and canceled using the specific shape of the signal coils 16a and 16b, even if the amount of magnetic flux affecting the signal coils 16a and 16b changes, retuning or the like is performed. It is possible to automatically cope with the change in the amount of magnetic flux without the need for an excellent noise suppression effect.
  • the signal coils 16a and 16b can be disposed at positions extremely close to the power coils 14a and 14b.
  • the signal coil 16a is accommodated in the same circumferential groove 38 together with the power coil 14a.
  • the lead wires 20 a and 24 a it is also possible to arrange the lead wires 20 a and 24 a so as to overlap with each other, which is difficult because the magnetic paths interfere with each other. Space complexity can be avoided to obtain extremely excellent space efficiency.
  • the power coils 14a and 14b can be protected from disturbance due to magnetism from a motor or the like.
  • FIG. 8 shows a liquid crystal display 70 and a controller 72 provided with the noncontact transmission device 10 according to the first embodiment as one application example.
  • the liquid crystal display 70 includes a liquid crystal panel 74.
  • the liquid crystal panel 74 is a liquid crystal display panel using a cholesteric liquid crystal, and by using the bistability characteristic of the cholesteric liquid crystal, it is possible to maintain the display content without applying a voltage.
  • the liquid crystal panel 74 is connected with a driver circuit 76 that controls the operation of the liquid crystal panel 74 based on predetermined image data.
  • Such a liquid crystal display 70 is provided with one coil head 12b of the noncontact transmission device 10 exposed to the outside.
  • the liquid crystal display 70 corresponds to the member 44b shown in FIG. 3.
  • the liquid crystal panel 74 and the driver circuit 76 correspond to the load 54 in FIG. 3 and the driver circuit 76 corresponds to the control circuit 58 in FIG. Therefore, although not shown, the liquid crystal display 70 is provided with the rectification and stabilization circuit 56 and the communication circuit 60 shown in FIG.
  • the controller 72 controls the operation of the liquid crystal display 70 by supplying power to the liquid crystal display 70 and transmitting and receiving control signals.
  • the controller 72 is transmitted to the liquid crystal display 70 based on the input contents from the input unit 80 such as a keyboard for inputting characters, numbers, etc., a display unit 82 such as a liquid crystal display for displaying input contents, and the input unit 80.
  • a control circuit 84 is provided to generate control signals.
  • a transmitter 86 is connected to the controller 72 via a cable.
  • the transmitter 86 is provided with the other coil head 12a of the noncontact transmission device 10 exposed to the outside.
  • the controller 72 corresponds to the member 44a shown in FIG. 3, and the control circuit 84 corresponds to the control circuit 50 in FIG. Therefore, although not shown, the controller 72 is provided with the power supply circuit 46, the inverter 48, the communication circuit 52 and the like shown in FIG. 3 and the power supply circuit 46 supplies driving power to the liquid crystal display 70. Be done.
  • the coil head 12a of the transmitter 86 is controlled by the liquid crystal display 70 after operating the input unit 80 of the controller 72 and inputting appropriate rewrite information. It is positioned opposite to the coil head 12b. Then, driving power is supplied from the power supply circuit 46 (see FIG. 3) of the controller 72 to the liquid crystal panel 74 and the driver circuit 76 of the liquid crystal display 70 through the power coils 14a and 14b. Further, a control signal as an electrical signal is transmitted from the control circuit 84 of the controller 72 to the driver circuit 76 of the liquid crystal display 70 through the signal coils 16a and 16b. Thereby, the driver circuit 76 changes the display content of the liquid crystal panel 74 based on the received control signal.
  • the non-contact transmission device 10 of the present embodiment can be used between the liquid crystal display 70 and the transmitter 86 of the controller 72 which can be separated from each other.
  • the controller 72 drives the liquid crystal panel 74 from the controller 72 only when the display content is rewritten using power coils 14a and 14b.
  • the signal coils 16a and 16b having the coil winding path according to the present invention are stacked on the power coils 14a and 14b and accommodated in the same pot core 18a or 18b.
  • Control signal as an electrical signal with excellent transmission quality, which can realize downsizing of the transmitter 86) and reduce the possibility of noise mixing while transmitting driving power from the controller 72 to the liquid crystal display 70. Can be transmitted.
  • control signal indicating completion of rewriting generated by the driver circuit 76 of the liquid crystal display 70
  • the control signal indicating completion of rewriting is superimposed on the high frequency voltage by the communication circuit 60 (see FIG. 3), and the signal coil 16b and the signal are generated.
  • the high frequency voltage is taken out by the communication circuit 52 and transmitted to the control circuit 84.
  • FIG. 9 schematically shows an ultrasonic spindle device 90 provided with the noncontact transmission device 10 of the first embodiment. Show.
  • the ultrasonic spindle device 90 is provided with a motor 94 as a rotational driving means in the main body 92, and the tool 100 is attached to the tip of the rotating main shaft 96 rotated by the motor 94 through the ultrasonic transducer 98. Structure.
  • the rotating spindle 96 is supported by the main body 92 via the bearings 102.
  • a labyrinth seal 104 is provided at the end of the main body 92 on the tip end side of the rotating main shaft 96 to prevent the entry of dust from the outside.
  • An ultrasonic transducer 98 is provided at the tip of the rotation main shaft 96.
  • the ultrasonic transducer 98 is, for example, a bolt-clamped Langevin transducer or the like formed by laminating a plurality of piezoelectric elements.
  • a tool 100 such as an end mill or a drill is attached to the ultrasonic transducer 98, for example. Then, the tool 100 is vibrated while being rotated with respect to the main body 92 by applying a high frequency voltage to the ultrasonic transducer 98 and vibrating it while rotating the rotation main shaft 96 with the motor 94, and the workpiece to be processed (not shown) It is possible to cut or grind members.
  • the ultrasonic transducer 98 is rotatable relative to the main body 92, and in order to supply driving power to the ultrasonic transducer 98 from the main body 92 side, the noncontact transmission device 10 is used. It can be used.
  • one coil head 12 a of the non-contact type transmission device 10 is provided at the end of the main body 92 on the tool 100 side, and the other coil head 12 b is fixed to the rotation main shaft 96.
  • the coil head 12a and the coil head 12b are disposed opposite to each other on a concentric axis with the main rotation axis 96 with a gap.
  • the main body 92 side corresponds to the member 44a shown in FIG. 3, and the main body 92 is provided with the power supply circuit 46, the inverter 48, the control circuit 50 and the communication circuit 52 shown in FIG. There is.
  • the rotation main axis 96 provided with the ultrasonic transducer 98 corresponds to the member 44 b, and the ultrasonic transducer 98 corresponds to the load 54.
  • a detection circuit 106 including, for example, a piezoelectric element or a Hall element, which detects the vibration state of the ultrasonic transducer 98 from the energized state, is amplified on the rotational main shaft 96, and a detection signal from the detection circuit 106 is amplified to obtain a high frequency voltage.
  • the amplifier circuit 108 is provided to supply the signal coil 16b, the detection circuit 106 corresponds to the control circuit 58 in FIG. 3, and the amplifier circuit 108 corresponds to the communication circuit 60 in FIG. Since the ultrasonic vibrator 98 is driven by an alternating voltage, in this example, the rectifying and stabilizing circuit 56 shown in FIG. 3 is not provided, and the power coil 14b is rectified and stabilized. It is connected to the ultrasonic transducer 98 without the intervention of the circuit 56.
  • the coil head 12a in the present application example is configured without using the pot core 18a.
  • the core member is not necessarily required. Therefore, it is also possible to omit the pot core 18b in the coil head 12b provided on the side of the rotation main shaft 96.
  • a shield member 110 is disposed outside the coil head 12a.
  • the shield member 110 is formed of a nonmagnetic material such as, for example, aluminum alloy, copper alloy, titanium alloy, nickel alloy, ceramics, synthetic resin material, and has a bottomed cylindrical shape in which a through hole is formed at the center .
  • the voltage applied to the ultrasonic transducer 98, the current flowing through the ultrasonic transducer 98, and the like are detected by the detection circuit 106 provided on the rotation main shaft 96 side, and detection as an electrical signal is performed. A signal is to be generated.
  • the detection signal generated by the detection circuit 106 is input from the amplification circuit 108 to the control circuit 50 (see FIG. 3) of the main body 92 via the signal coils 16 b and 16 a.
  • the control circuit 50 on the main body 92 side it is possible to detect the vibration state of the ultrasonic transducer 98 based on, for example, the phase and amplitude of voltage and current transmitted from the detection circuit 106.
  • By adjusting the drive frequency of the inverter 48 it is possible to perform feedback control to adjust the frequency of the voltage applied to the ultrasonic transducer 98.
  • the ultrasonic spindle device 90 As described above, in the present embodiment, electric power is transmitted from the coil head 12a to the coil head 12b, while an electric signal is transmitted from the coil head 12b to the coil head 12a. And, in the ultrasonic spindle device 90 of this example, by using the non-contact type transmission device 10 having a structure according to the present invention, the power coil 14a and the signal are transmitted on the main body 92 side and the rotating main shaft 96 side respectively.
  • the coil 16a, the power coil 14b, and the signal coil 16b can be disposed so as to overlap in the axial direction (vertical direction in FIG. 9) of the rotary spindle 96 on the same axis as that of the rotary spindle 96. Thereby, the radial dimension (the dimension in the left-right direction in FIG. 9) of the ultrasonic spindle device 90 can be miniaturized.
  • the noise electromotive force can be reduced by the structure of the signal coils 16a and 16b itself, no special noise removal processing is required, and the detection signal transmitted from the detection circuit 106 can be used as the control circuit 50 of the main body 92. Reproduction can be performed promptly (see FIG. 3). As a result, in feedback control, it is possible to eliminate or reduce the effort of considering the time delay of the detection signal. As a result, control can be simplified, and feedback control with higher responsiveness can be performed.
  • FIG. 10 shows one coil head 120 in a disassembled state, which constitutes a non-contact type transmission apparatus according to a second embodiment of the present invention.
  • the lead wire 24a is extended from the first winding portion 26 after the lead wire 24a is wound in a circle to form the first winding portion 26.
  • the second winding portion 28 is formed by being wound around the first winding portion 26 in the opposite direction.
  • the first winding portion 26 is accommodated in the circumferential groove 38 of the pot core 18a, and then the power coil 14a and the second winding portion 28 are accommodated in order. Thereby, the first winding portion 26 and the second winding portion 28 are disposed on both sides sandwiching the power coil 14a in the axial direction.
  • first winding portion 26 and the second winding portion 28 in the signal coil 16a on different planes.
  • the formation space of the first winding portion 26 and the formation space of the second winding portion 28 can be largely secured, respectively. Therefore, the first winding portion 26 and the second winding portion 28 can be provided.
  • the degree of freedom in setting the number of turns can be improved.
  • FIG. 11 shows a noncontact transmission apparatus 130 according to a third embodiment of the present invention.
  • the lead wire 24b of the signal coil 16b accommodated in the circumferential groove 38 of the pot core 18b is extended out of the pot core 18b in one coil head 12b.
  • And is wound around the outer peripheral surface 132 of the pot-shaped core 18b.
  • An outer peripheral winding portion 134 is formed by the lead wire 24 b wound around the outer peripheral surface 132.
  • the winding direction of the outer peripheral winding portion 134 is set to be equal to one of the first winding portion 26 and the second winding portion 28.
  • the first winding portion 26, the second winding portion 28, and the outer peripheral winding portion 134 form coil winding paths that generate electromotive forces in opposite directions. In this way, the noise reduction effect can be adjusted more accurately.
  • the signal coil 16a of the coil head 12a facing the coil head 12b has an annular shape which is wound in only one direction and which has been widely used conventionally.
  • the coil winding path that generates electromotive forces in opposite directions may be formed in at least one of the signal coils 16a and 16b facing each other.
  • FIG. 12 schematically shows a signal coil 140 as a second coil member which constitutes the non-contact type transmission apparatus as the fourth embodiment of the present invention.
  • the outer coil portion 144 is formed by the signal coil 140 being extended in the circumferential direction (about 1/6 in the present embodiment) in which the lead wire 142 does not reach one round on the outer side in the radial direction. It is folded back from the outer winding portion 144 and extended in the radial inner direction by a circumferential direction (approximately 1/6 in this embodiment) substantially equal to the outer winding portion 144 in the opposite direction to the outer winding portion 144 Thus, an inner winding portion 146 is formed, and a small loop portion 148 is formed by the outer winding portion 144 and the inner winding portion 146.
  • each small loop portion 148 can be set arbitrarily.
  • Such small loop portions 148 are continuously formed, and a plurality of small loop portions 148 are formed side by side in the circumferential direction.
  • the outer winding portions 144 of each small loop portion 148 are formed on substantially the same circumference, and the plurality of outer winding portions 144 form the first winding portion 150
  • An inner winding portion 146 of the small loop portion 148 is formed on substantially the same circumference inside the outer winding portion 144, and a plurality of inner winding portions 146 form a second winding portion 152.
  • the outer winding portion 144 and the inner winding portion 146 are opposite to each other around the center o of the power coil (not shown) disposed concentrically with the signal coil 140.
  • the outer winding portion 144 is wound clockwise, the inner winding portion 146 counterclockwise
  • a first winding portion 150 and a second winding portion 152 can be formed that are wound oppositely to each other.
  • the noise electromotive force can be reduced according to, for example, the variation of the local magnetic flux change amount in the circumferential direction of the signal coil 140.
  • the effect can be adjusted more precisely.
  • the shape stability of the signal coil 140 can also be improved by forming a plurality of annular small loop portions 148 partially extending in the circumferential direction.
  • an electrical signal transmitted from the member 44 a side is a member 44 b using the noncontact transmission device 10 (see FIG. 3) having a structure according to the first embodiment.
  • the result of having measured the time required until it receives by the side is shown.
  • ⁇ X in the lower part of the graph in FIG. 13 the time required for signal transmission from the time when the electrical signal is transmitted on the side of the member 44a: X1 to the time when the electrical signal is received on the side of the member 44b: X2 is It was 64.0 ns, confirming that extremely rapid signal transmission is possible.
  • the number of first coil members and the number of second coil members are not limited to only one each, and for example, it is possible to provide a plurality of pairs of first coil members and second coil members. It is. Also, the relative position of the first coil member and the second coil member is not limited to the position where the coil windings overlap with each other as in the above embodiment, for example, the first coil member The second coil member may be disposed adjacent to the first coil member at a close position where it may be affected by the magnetic flux. Therefore, even when the first coil member and the second coil member are disposed in an overlapping manner, they need not necessarily be disposed on the concentric axis, and the second coil member may be arranged relative to the first coil member. It may be disposed eccentrically.
  • the winding shape of the first coil member and the second coil member is not limited to a circular shape, and may be, for example, a rectangular shape or an elliptical shape.
  • the specific shape of the coil winding path generating the electromotive forces in opposite directions in the second coil member is not limited to the shape of the above embodiment.
  • the first coil member may be used to transmit an electrical signal.
  • the power coil 14a is used to transmit a signal.
  • the control circuit 50 and the communication circuit 52 are connected in the same manner as the control coil 16a, while the control circuit 58 and the communication circuit 60 are connected to the power coil 14b in the same manner as the signal coil 16b. , 16b can be performed to transmit an electrical signal.
  • the switching timing of the inverter 48 for power transmission is set by the control circuit 50 on the member 44a side serving as the transmission source. It may be detected, and the transmission timing of the electric signal, that is, the application timing of the voltage to the signal coil 16a may be controlled in accordance with the switching timing of the inverter 48.
  • 10 non-contact type transmission device
  • 12a, b coil head
  • 14a, b power coil (first coil member)
  • 16a, b signal coil (second coil member)
  • 18a, b pot Mold core (core member)
  • 20a, b lead wire (coil winding of power coil)
  • 24a, b lead wire (coil winding of signal coil)
  • 40 outer wall
  • 42 inner wall
  • 44a, b member
  • 110 shield member (nonmagnetic material)
  • 134 outer peripheral winding portion
  • 144 outer winding portion
  • 146 Inner winding portion
  • 148 Small loop portion

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

La présente invention concerne un dispositif de transmission sans contact de conception nouvelle, qui permet de réduire, par une configuration simple, l'impact de flux magnétique provenant d'autres éléments de bobine et selon lequel on peut disposer plusieurs éléments de bobine à proximité immédiate et avec un meilleur rendement spatial. Selon l'invention, le dispositif de transmission sans contact comprend deux premiers éléments de bobine (14a, 14b) disposés se faisant face de façon à pouvoir être décalés l'un rapport à l'autre et deux seconds éléments de bobine (16a, 16b) disposés se faisant face de façon à pouvoir être décalés l'un rapport à l'autre. Consécutivement à une induction mutuelle, des signaux de puissance ou électriques sont transmis entre les deux premiers éléments de bobine (14a, 14b) et des signaux électriques sont transmis entre les deux seconds éléments de bobine (16a, 16b). Au moins l'un des deux seconds éléments de bobine (16a, 16b) est formé suivant des trajets d'enroulement de bobine (26, 28) qui décalent une force électromotrice générée dans lesdits seconds éléments de bobine (16a, 16b) consécutivement à l'impact du flux magnétique généré par les premiers éléments de bobine (14a, 14b).
PCT/JP2013/000170 2013-01-16 2013-01-16 Dispositif de transmission sans contact Ceased WO2014111971A1 (fr)

Priority Applications (2)

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JP2014557176A JPWO2014111971A1 (ja) 2013-01-16 2013-01-16 無接触式伝送装置
PCT/JP2013/000170 WO2014111971A1 (fr) 2013-01-16 2013-01-16 Dispositif de transmission sans contact

Applications Claiming Priority (1)

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PCT/JP2013/000170 WO2014111971A1 (fr) 2013-01-16 2013-01-16 Dispositif de transmission sans contact

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JP2016059123A (ja) * 2014-09-08 2016-04-21 株式会社日本自動車部品総合研究所 非接触給電装置
JP2016171667A (ja) * 2015-03-12 2016-09-23 パナソニックＩｐマネジメント株式会社 非接触給電装置および非接触給電システム
CN109155189A (zh) * 2016-05-12 2019-01-04 麦克赛尔株式会社 电力线圈
JP2023114051A (ja) * 2022-02-04 2023-08-17 株式会社豊田中央研究所 トランス巻線構造およびコネクタ外れ検出装置
JP2024007182A (ja) * 2022-07-05 2024-01-18 羽昌科技（深セン）有限公司 超音波援用加工装置および受電装置

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JPH10215530A (ja) * 1997-01-28 1998-08-11 Matsushita Electric Works Ltd 非接触電力伝送装置
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JP2002209344A (ja) * 2001-01-12 2002-07-26 Matsushita Electric Works Ltd 非接触電力伝送装置
JP2003318632A (ja) * 2002-04-02 2003-11-07 Commiss Energ Atom マルチパート受信アンテナ
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JPH08241385A (ja) * 1995-03-03 1996-09-17 Hitachi Maxell Ltd 非接触メモリカード及びこれに搭載可能な電磁結合装置
JPH10215530A (ja) * 1997-01-28 1998-08-11 Matsushita Electric Works Ltd 非接触電力伝送装置
JP2002050531A (ja) * 2000-07-31 2002-02-15 Dainippon Printing Co Ltd 信号及び電源伝送用ロータリジョイント
JP2002209344A (ja) * 2001-01-12 2002-07-26 Matsushita Electric Works Ltd 非接触電力伝送装置
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Publication number Priority date Publication date Assignee Title
JP2016059123A (ja) * 2014-09-08 2016-04-21 株式会社日本自動車部品総合研究所 非接触給電装置
JP2016171667A (ja) * 2015-03-12 2016-09-23 パナソニックＩｐマネジメント株式会社 非接触給電装置および非接触給電システム
CN109155189A (zh) * 2016-05-12 2019-01-04 麦克赛尔株式会社 电力线圈
CN109155189B (zh) * 2016-05-12 2020-11-10 麦克赛尔株式会社 电力线圈
JP2023114051A (ja) * 2022-02-04 2023-08-17 株式会社豊田中央研究所 トランス巻線構造およびコネクタ外れ検出装置
JP7774461B2 (ja) 2022-02-04 2025-11-21 株式会社豊田中央研究所 トランス巻線構造およびコネクタ外れ検出装置
JP2024007182A (ja) * 2022-07-05 2024-01-18 羽昌科技（深セン）有限公司 超音波援用加工装置および受電装置
JP7441458B2 (ja) 2022-07-05 2024-03-01 羽昌科技（深セン）有限公司 超音波援用加工装置および受電装置

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