JP2005078829A - Power supply cable and car equipped with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply cable having a simple structure and a high inductance value and having a heat dissipation mechanism, and an automobile equipped with such a power supply cable.
A power supply cable includes a covered cable formed by covering a conductive cable with an insulator, a magnetic core, a shield member, and a fixing member. The magnetic core 220 is arranged so that the magnetic flux generated by the conductive cable passes through and the inner peripheral surface thereof forms a heat transfer path with the covered cable 210. Between the covered cable 210 and the magnetic core 220 and the shield member 240, a heat conductive filler 230 is filled. Further, a fixing member 250 for fastening the covered cable 210 and the magnetic core 220 housed in the shield member 240 to the vehicle body 300 is formed of a heat transfer material. Therefore, the structure for fixing the power supply cable 150 can form a heat radiation path for heat generation in the power supply cable 150 together.
[Selection] Figure 3

Description

  The present invention relates to a power supply cable and a vehicle equipped with the power supply cable, and more particularly to a power supply cable suitable for an electric system of a vehicle and a vehicle equipped with the power supply cable.

  Recently, hybrid vehicles and electric vehicles have attracted a great deal of attention as environmentally friendly vehicles. Some hybrid vehicles have been put into practical use.

  This hybrid vehicle is a vehicle that uses a DC power source and a motor driven by an inverter as a power source in addition to a conventional engine. That is, a power source is obtained by driving the engine, a DC voltage from a DC power source is converted into AC by an inverter, and a motor is rotated by the converted AC to obtain a power source. An electric vehicle is a vehicle that uses a DC power source, an inverter, and a motor driven by the inverter as a power source.

  Therefore, these automobiles are provided with an electric system for supplying power from a DC power supply device constituted by a secondary battery to an AC motor for driving a vehicle via a semiconductor power conversion device such as an inverter. In the electric system, a power supply cable for supplying power by electrically connecting these devices is disposed.

In particular, in order to suppress high-frequency current that becomes noise, a configuration in which a power supply line (power supply cable) from an inverter to a three-phase AC motor is inserted into a core for configuring a zero-phase reactor is disclosed in, for example, Patent Document 1. Is disclosed.
JP 2002-51403 A JP-A 61-233905

  In particular, in a power supply system for an AC motor for driving a vehicle, since a relatively large current flows through the power supply cable, it is necessary to consider a heat dissipation mechanism for preventing a temperature increase of the power supply cable. However, in the techniques disclosed in Patent Document 1 and Patent Document 2 described above, no consideration is given to heat dissipation from the power supply cable.

  Also, in automobiles, the arrangement of the power feeding system tends to be restricted in order to ensure comfort and loadability (storage capacity), and the heat dissipation mechanism is also required to be realized with a simpler configuration. . Generally, in semiconductor power converters, the size of reactors required for converters such as step-up / step-down choppers, current control inverters, and the like tends to increase, and therefore, these reactors are required to be downsized. If a power supply cable connected in series with these reactors can be configured with a high inductance value, it can contribute to miniaturization of the reactor body.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a power supply cable having a simple structure and a high inductance value and having a heat dissipation mechanism, and such a power supply cable. Is to provide cars equipped with.

  The power supply cable according to the present invention includes a covered cable, a magnetic body, and heat exchange means. The covered cable is configured by covering the outer periphery of the conductive cable with an insulator. The magnetic body is disposed in proximity to the covered cable so as to form a heat transfer path with the covered cable. The heat exchanging means forms a heat transfer path between the large heat capacity member having a larger heat capacity than the power supply cable and the magnetic body.

  Preferably, the heat exchange means includes a fixing member made of a heat transfer material for fastening the magnetic body and the covered cable to the large heat capacity member.

  More preferably, the heat exchange means further includes a shield member and a filler. The shield member is continuously provided in the longitudinal direction so as to cover the magnetic body and the covered cable in order to shield the magnetic flux from the covered cable. The filler is made of a material that is filled between the magnetic body and the covered cable and the shield member and that can form a heat transfer path between the magnetic body and the covered cable and the shield member. The fixing member fastens the shield member to the large heat capacity member.

  Particularly in such a configuration, the filler is composed of a potting material for sealing the magnetic body and the covered cable.

  Preferably, the magnetic body has an annular shape, the covered cable is disposed so as to contact the inner peripheral surface of the magnetic body, and the heat exchange means is formed between the outer peripheral surface of the magnetic body and the large heat capacity member. Heat generated by the covered cable is radiated to the large heat capacity member through the heat transfer path.

  Alternatively, preferably, the magnetic body has an annular shape, and the coated cable is wound around the magnetic body a plurality of times.

  Preferably, the power feeding cable is connected in series with the reactor in the electric circuit.

  Preferably, a number of power supply cables are connected in series in accordance with the inductance value of the reactor instead of the reactor required in the electric circuit.

An automobile according to the present invention includes the power feeding cable according to any one of claims 1 to 8,
The large heat capacity member in which the heat transfer path is formed with the magnetic body corresponds to the body of the automobile.

  Preferably, the automobile is provided between a DC power supply for supplying DC power, an AC motor driven by AC power, and the DC power supply and the AC motor to convert power between DC power and AC power. And a power conversion device for performing the operation, and the power supply cable is connected between the DC power supply device and the power conversion device.

  Preferably, the automobile is provided between a DC power supply that supplies DC power of a predetermined DC voltage, an AC motor that is driven by AC power, and between the DC power supply and the AC motor. The power converter further includes a converter circuit that performs voltage conversion of DC power, and power conversion between the DC power converted by the converter circuit and the voltage that drives the AC motor. The power supply cable is connected to the power converter so as to act as at least part of the reactor in the converter circuit.

  Alternatively, preferably, the automobile is provided between a DC power supply that supplies DC power, a three-phase AC motor that is driven by AC power, and the DC power supply and the AC motor. A power conversion device for performing conversion, and the power supply cable is connected between the power conversion device and the AC motor, and includes three covered cables each corresponding to three phases, and the magnetic body is annular. The three covered cables have a shape and are arranged so as to contact the inner peripheral surface of the magnetic body.

  More preferably, the AC motor is capable of driving at least one wheel.

  Therefore, according to the present invention, it is possible to increase the inductance value by the magnetic body and to form a path for radiating the heat generated by the covered cable to other members. As a result, the temperature rise of the power feeding cable can be prevented.

  In particular, by using a fixing member formed of a heat transfer material and fastening the magnetic body and the covered cable to other members, there is no need to add a special configuration for heat dissipation. The temperature rise of the power feeding cable can be prevented without causing pressure on the arrangement space of the apparatus and an increase in manufacturing cost.

  Further, the magnetic body and the covered cable are internally covered so as to be covered with the shield member, and the shield member is arranged with another member by the fixing member, so that the magnetic cable leaks as the temperature of the feeding cable rises. Further suppression is possible.

  In particular, since the filling material filled between the magnetic body and the covered cable and the shield member is used as a potting material, the heat radiation path from the magnetic body and the covered cable is formed, and impact resistance and corrosion resistance are provided. Can do.

  By making the magnetic body into an annular shape, the inner peripheral surface and the covered cable are brought into contact with each other, and a heat dissipation path is formed from the outer peripheral surface to another member, whereby the configuration for heat dissipation can be further simplified.

  Moreover, the inductance value of the power feeding cable can be efficiently increased by adopting a configuration in which the coated cable is wound around the annular magnetic body a plurality of times.

  Furthermore, by connecting the power feeding cable according to the present invention in series with the reactor in the electric circuit, the inductance value of the power feeding cable acts as a part of the reactor, so that the reactor can be downsized.

  Further, by connecting in series the number of feeding cables according to the present invention corresponding to the inductance value of the reactor in the electric circuit, the arrangement of the reactor can be omitted, and the circuit can be miniaturized.

  In the automobile according to the present invention, it is possible to form a path for radiating the heat generated by the power feeding cable whose inductance value is increased by the magnetic material to the vehicle body. As a result, the temperature rise of the power feeding cable can be prevented with a simple configuration.

  Furthermore, such a power supply cable can be used as a battery cable in a power supply system of an automobile.

  Further, such a power supply cable can be used so as to act as at least a part of a reactor provided in a converter circuit in a power supply system of an automobile. Therefore, the inductance value necessary for the reactor can be reduced, and the converter circuit can be reduced in size.

  Moreover, such a power feeding cable can be used as a three-phase cable in a power feeding system of an automobile.

  In particular, even when the power supply cable of the present invention is used for power supply to the AC motor for driving the wheel, the temperature rise of the power supply cable can be prevented even though a relatively large current passes through the power supply cable.

  Embodiments of the present invention will be described in detail with reference to the drawings. In addition, about the same or equivalent part in a figure, the same code | symbol is attached | subjected and the description is not repeated.

  FIG. 1 is a schematic block diagram of a hybrid vehicle shown as an example of a vehicle according to an embodiment of the present invention.

  Referring to FIG. 1, a hybrid vehicle 100 according to an embodiment of the present invention includes a battery 10, a PCU (Power Control Unit) 20, a power output device 30, a differential gear (DG: Differential Gear) 40, and a front wheel. 50L, 50R, rear wheels 60L, 60R, front seats 70L, 70R, and a rear seat 80 are provided.

  The battery 10 is disposed at the rear portion of the rear seat 80. The battery 10 is electrically connected to the PCU 20 by a power supply cable that will be described in detail later.

  The PCU 20 and the power output device 30 are disposed in the engine room on the front side of the dashboard 90. The PCU 20 is electrically connected to the power output device 30 by a power feeding cable. The power output device 30 is connected to the DG 40.

  The battery 10 supplies a DC voltage to the PCU 20 and is charged by the DC voltage from the PCU 20. That is, the battery 10 constitutes a “DC power supply device” in the automobile 100.

  PCU 20 boosts the DC voltage from battery 10, converts the boosted DC voltage to an AC voltage, and drives and controls two motor generators included in power output device 30. Further, the PCU 20 charges the battery 10 by converting the AC voltage generated by the motor generator included in the power output device 30 into a DC voltage. That is, PCU 20 is provided as a “power converter” that performs power conversion between AC power and DC power in the power supply system of automobile 100.

  The power output device 30 transmits power from the engine and / or motor generator to the front wheels 50L and 50R via the DG 40 to drive the front wheels 50L and 50R. Further, the power output device 30 generates power by the rotational force of the front wheels 50L and 50R, and supplies the generated power to the PCU 20.

  The DG 40 transmits the power from the power output device 30 to the front wheels 50L and 50R, and transmits the rotational force of the front wheels 50L and 50R to the power output device 30.

  FIG. 2 is a block diagram illustrating a configuration of the automobile power supply system illustrated in FIG. 1.

  Referring to FIG. 2, battery 10 and PCU 20 are electrically connected by power supply cable 200. PCU 20 includes system relays SR1 and SR2, capacitors C1 and C2, a bidirectional converter 110, and an inverter 130.

  When system relays SR1 and SR2 are turned on by a control device (not shown), DC voltage from battery 10 is supplied to capacitor C1. Capacitor C1 smoothes the DC voltage supplied from battery 10 via system relays SR1 and SR2, and supplies the smoothed DC voltage to bidirectional converter 110.

  Bidirectional converter 110 includes a reactor 111, NPN transistors 112 and 113, and diodes 114 and 115. One end of the reactor 111 is connected to a power supply line of the battery 10 by a power feeding cable 202. The other end of reactor 111 is connected between a connection node between NPN transistor 112 and NPN transistor 113, that is, between the emitter of NPN transistor 112 and the collector of NPN transistor 113.

  NPN transistors 112 and 113 are connected in series between the power supply line and the earth line. The collector of the NPN transistor 112 is connected to the power supply line, and the emitter of the NPN transistor 113 is connected to the ground line. In addition, diodes 114 and 115 for passing a current from the emitter side to the collector side are arranged between the collector and emitter of each NPN transistor 112 and 113.

  In bidirectional converter 110, NPN transistors 112 and 113 are turned on / off by a control device (not shown), boosts the DC voltage supplied from capacitor C1, and supplies the output voltage to capacitor C2. Bidirectional converter 110 reduces the DC voltage generated by AC motor M1 and converted by inverter 130 during regenerative braking of automobile 100, and supplies the voltage to capacitor C1.

  Thus, bidirectional converter 110 operates as a boost chopper capable of regenerative operation. Since the reactor 111 included in the bidirectional converter 110 needs to accumulate electromagnetic energy for the boosting operation, an inductance value corresponding to the boosting ratio is required. For this reason, the reactor 111 tends to increase in size. Therefore, the power feeding cable 202 is connected in series with the reactor 111 so as to act as at least a part of the reactor 111.

  Capacitor C <b> 2 smoothes the DC voltage supplied from bidirectional converter 110 and supplies the smoothed DC voltage to inverter 130. The power supply cable 204 connects the positive electrode of the capacitor C2, that is, the power supply line of the bidirectional converter 110 and the inverter 130.

  When a DC voltage is supplied from the capacitor C2, the inverter 130 converts the DC voltage into an AC voltage based on control from a control device (not shown) and drives the AC motor M1. Thus, AC motor M1 is driven so as to generate torque specified by the torque command value. Further, inverter 130 converts the AC voltage generated by AC motor M1 into a DC voltage based on control from the control device during regenerative braking of automobile 100, and the converted DC voltage is converted to a bidirectional converter via capacitor C2. 110.

  That is, AC motor M1 corresponds to an AC motor for driving wheels, specifically, a motor generator included in power output device 30 shown in FIG. In the present embodiment, the AC motor is typically shown as a three-phase motor. AC motor M1 and inverter 130 are electrically connected by a three-phase power supply cable 206.

  Next, the configuration of the power feeding cable according to the embodiment of the present invention will be described in detail.

  3 and 4 are diagrams for describing the configuration of power supply cable 150 according to the first configuration example according to the embodiment of the present invention.

  Referring to FIG. 3, power supply cable 150 includes one covered cable 210, at least one magnetic body 220, a filler 230, a shield member 240, and a fixing member 250. The covered cable 210 is inserted into the magnetic body 220. The shield member 240 is continuously provided in the longitudinal direction so as to cover the covered cable 210 and the magnetic body 220 in order to shield the magnetic flux from the covered cable 210. The filler 230 is filled between the covered cable 210 and the magnetic body 220 and the shield member 240. The fixing member 250 fastens the covered cable 210 and the magnetic body 220 housed in the shield member 240 to the vehicle body 300. That is, the fixing member 250 corresponds to a configuration for fixing the power supply cable 150 to the vehicle body 300.

  4 is a cross-sectional view taken along the line IV-IV in FIG. 3 for explaining the fixed configuration.

  Referring to FIG. 4, the magnetic body 220 adjacent to the covered cable 210 typically has an annular shape (donut shape). The covered cable 210 is disposed so as to contact the inner peripheral surface of the magnetic body 220. As the magnetic body 220, a general magnetic core material for inductors can be used, and the shape thereof is not limited to an annular shape.

  The magnetic body 220 forms a heat transfer path between the inner periphery and the covered cable 210. Preferably, the inner diameter of the magnetic body 220 is designed so as to be in contact with the outer diameter of the covered cable 210. Alternatively, when the inner diameter of the magnetic body 220 is larger than the outer diameter of the covered cable 210, a material having a high thermal conductivity may be filled between them. Thereby, the heat generated in the covered cable 210 is transmitted to the magnetic body 220.

  In this embodiment, the length of the magnetic body 220 in the longitudinal direction of the power feeding cable 150 matches the length of the fixing member 250, and the position of the magnetic body 220 and the position of the fixing member 250 match.

  In addition, although not shown in figure, the covered cable 210 shall be comprised by the insulator (insulating film) formed in the outer surface so that a conductive cable and a conductive cable may be covered.

  The magnetic bodies 220 are arranged close to each other so that the magnetic flux generated by the passing current of the covered cable 210 passes. Therefore, the inductance value of the power supply cable 150 can be increased by the arrangement of the magnetic body 220.

  Furthermore, the shield member 240 that houses the covered cable 210 and the magnetic body 220 is typically formed of a metal material. As the filler 230 filled between the shield member 240, the covered cable 210, and the magnetic body 220, a material having high thermal conductivity and capable of absorbing shock is applied. For example, a potting material used for sealing an electronic circuit can be applied. Specific potting materials include urethane, epoxy, silicon, etc., which are thermosetting resins.

  The covered cable 210 and the magnetic body 220 housed in the shield member 240 are fastened to the vehicle body (body) 300 of the automobile 100 via the fixing member 250 by fixing members such as bolts 270 and 271.

  The fixing member 250 has rigidity for supporting and fixing the shield material 240 in which the covered cable 210 and the magnetic body 220 are housed, and heat for forming a heat transfer path between the shield material 240 and the vehicle body 300. Conductivity is required, and it is typically formed of a metal such as aluminum. As a result, a heat transfer path can be formed between the covered cable 210 and the vehicle body 300 via the magnetic body 220, the filler 230, the shield member 240, and the fixing member 250. That is, the filler 230, the shield member 240, and the fixing member 250 act as “heat exchange means” that forms a heat transfer path between the vehicle body 300 having a larger heat capacity than the power supply cable 150 and the magnetic body 220.

  Thus, a configuration for fixing the power supply cable 150 with an increased inductance value to the vehicle body 300 can be used to form a heat transfer path for radiating heat generated by the power supply cable 150 to the vehicle body 300. That is, it is possible to avoid an increase in the temperature of the power supply cable even when a relatively large current flows through the power supply cable 150 without providing a special heat dissipation path.

  The power supply cable 150 shown in FIGS. 3 and 4 can be applied to each part of the power supply system shown in FIG. 2 as a basic power supply cable configuration example according to the present invention.

  5 and 6 are diagrams for describing the configuration of power feeding cable 160 according to the second configuration example according to the embodiment of the present invention.

  Referring to FIG. 5, a power supply cable 160 includes two covered cables 210 and 211 forming a pair, at least one magnetic body 220 into which the covered cables 210 and 211 are inserted in common, a filler 230, and the like. The shield member 240 and the fixing member 250 are included. For example, the two covered cables 210 and 211 correspond to a power supply line and an earth line, respectively. Typically, the power supply cable 160 is applicable as the power supply cable 200 shown as a battery cable in FIG.

  6 is a cross-sectional view taken along the line VI-VI in FIG. 5 for illustrating a configuration for fixing the power supply cable 160.

  As can be understood by comparing FIG. 6 with FIG. 4, in the power feeding cable 160, a heat transfer path is formed between the inner periphery of the magnetic body 220 and the two covered cables 210 and 211. The magnetic body 220 is disposed in close proximity so that the inner periphery of the magnetic body 220 is in contact with the two covered cables 210 and 211. Since the configuration and arrangement of filler 230, shield member 240, fixing member 250 and fixing portions 270 and 271 are the same as those shown in FIG. 4, detailed description will not be repeated.

  7 and 8 are diagrams for describing the configuration of power feeding cable 170 according to the third configuration example according to the embodiment of the present invention.

  Referring to FIG. 7, a power supply cable 170 includes three covered cables 210 to 212 that respectively supply power to a three-phase load, and at least one magnetic body 220 in which the covered cables 210 to 212 are inserted in common. A filler 230, a shield member 240, and a fixing member 250 are included. Typically, the feed cable 170 is applicable as the feed cable 206 shown as a three-phase cable in FIG.

  FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 6 for explaining the configuration for fixing the power supply cable 170.

  As can be understood by comparing FIG. 8 with FIG. 4, in the power feeding cable 170, a heat transfer path is formed between the inner periphery of the magnetic body 220 and the three covered cables 210 to 212. The magnetic body 220 is disposed in close proximity so that the inner periphery of the magnetic body 220 is in contact with the three covered cables 210 to 212. Other configurations and arrangements of filler 230, shield member 240, fixing member 250, and fixing portions 270 and 271 are the same as those shown in FIG. 4, and thus detailed description thereof will not be repeated.

  9 and 10 are diagrams for describing the configuration of power feeding cable 180 according to the fourth configuration example according to the embodiment of the present invention.

  Referring to FIG. 9, a power feeding cable 180 includes at least one magnetic body 220, a covered cable 210 wound around the magnetic body 220 a plurality of times, a filler 230, a shield member 240, and a fixing member 250. Including. The power supply cable 180 has a configuration effective for securing a higher inductance value, and is typically applicable as the power supply cable 202 shown in FIG.

  FIG. 10 is a cross-sectional view taken along the line XX in FIG. 9 for illustrating a configuration for fixing the power supply cable 180.

  As can be understood by comparing FIG. 10 with FIG. 4, in the power feeding cable 170, the inner and outer peripheral portions of the magnetic body 220 and the wound coated cable 210 are brought into close contact with each other. A heat transfer path is formed between them. Other configurations and arrangements of filler 230, shield member 240, fixing member 250, and fixing portions 270 and 271 are the same as those shown in FIG. 4, and thus detailed description thereof will not be repeated.

  Since the feeder cable according to the embodiment of the present invention shown in FIGS. 3 to 10 is connected in series to the reactor required in the electric circuit, the inductance value of the reactor can be suppressed. The reactor can be reduced in size. Alternatively, the arrangement of the reactor can be omitted by connecting a plurality of power supply cables according to the embodiments of the present invention in series according to the inductance value required for the reactor.

  In the above embodiment, the length of the magnetic body 220 in the longitudinal direction of the power supply cable 150 matches the length of the fixing member 250, and the position of the magnetic body 220 matches the position of the fixing member 250. Although shown, the length and position of the magnetic body 220 and the fixing member 250 can be arbitrary.

  In FIG. 2, even when the bidirectional converter 110 is configured as a step-down chopper, the feeding cable 206 is connected to the smoothing reactor so as to act as at least part of the output voltage smoothing reactor required for the step-down chopper. Can be connected in series. Alternatively, it is possible to connect a plurality of power supply cables 206 in series according to the inductance value required for the smoothing reactor, and to omit the arrangement of the reactors. That is, the power supply cable according to the present invention can be used so as to act as at least a part of a reactor in an arbitrary electric circuit.

  In addition, when the inverter 130 is configured by a current control type inverter, a higher-inductance power supply cable such as the power supply cable 180 can be provided as at least a part of the reactor for smoothing the input current.

  Further, in the above description, the PCU 20 is described as being mounted on a hybrid vehicle. However, in the present invention, the PCU 20 may be mounted on an electric vehicle or a fuel cell vehicle.

  In the above description, the example applied to the power supply system for the AC motor M1, which is a three-phase motor for driving a power supply cable wheel according to the present invention, has been described. However, the power supply cable according to the present invention is a power supply system for other loads of an automobile. In addition, the present invention can be similarly applied not only to a power supply system for automobiles but also to a power supply system for general equipment. Also in this case, the power supply cable according to the present invention can be applied to any of a battery cable, a power supply cable to a motor, or a power supply cable connected in series to an inductor in an electric circuit.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.

1 is a schematic block diagram of a hybrid vehicle shown as an example of a vehicle according to an embodiment of the present invention. It is a block diagram explaining the structure of the electric power feeding system of the motor vehicle shown in FIG. It is a 1st figure explaining the 1st structural example of the electric power feeding cable by embodiment of this invention. It is a 2nd figure explaining the 1st structural example of the electric power feeding cable by embodiment of this invention. It is a 1st figure explaining the 2nd structural example of the electric power feeding cable by embodiment of this invention. It is a 2nd figure explaining the 2nd structural example of the electric power feeding cable by embodiment of this invention. It is a 1st figure explaining the 3rd structural example of the electric power feeding cable by embodiment of this invention. It is a 2nd figure explaining the 3rd structural example of the electric power feeding cable by embodiment of this invention. It is a 1st figure explaining the 4th structural example of the electric power feeding cable by embodiment of this invention. It is a 2nd figure explaining the 4th structural example of the electric power feeding cable by embodiment of this invention.

Explanation of symbols

  10 Battery, 50L, 50R Front wheel, 60L, 60R Rear wheel, 100 Automobile, 110 Bidirectional converter, 111 Reactor, 150, 160, 170, 180, 200, 202, 204, 206 Feed cable, 210, 211, 212 Covered cable 220, magnetic body, 230 filler, 240 shield member, 250 fixing member, 270, 271 bolt, 300 vehicle body, M1 AC motor.

Claims (13)

A power supply cable for power supply,
A covered cable configured by covering the outer periphery of the conductive cable with an insulator;
A magnetic body disposed in proximity to the covered cable so as to form a heat transfer path between the covered cable;
A power supply cable comprising a heat exchange means that forms a heat transfer path between a large heat capacity member having a larger heat capacity than the power supply cable and the magnetic body.   The power supply cable according to claim 1, wherein the heat exchange means includes a fixing member made of a heat transfer material for fastening the magnetic body and the covered cable to the large heat capacity member. The heat exchange means includes
In order to shield the magnetic flux from the coated cable, a shield member provided continuously in the longitudinal direction so as to cover the magnetic body and the coated cable;
And further comprising a filler filled between the magnetic body and the covered cable and the shield member,
The filler is made of a material capable of forming a heat transfer path between the magnetic body and the covered cable and the shield member,
The power feeding cable according to claim 2, wherein the fixing member fastens the shield member to the large heat capacity member.   The power supply cable according to claim 3, wherein the filler is made of a potting material for sealing the magnetic body and the covered cable. The magnetic body has an annular shape,
The coated cable is disposed so as to contact the inner peripheral surface of the magnetic body,
The heat exchange means radiates heat generated by the covered cable to the large heat capacity member via a heat transfer path formed between an outer peripheral surface of the magnetic body and the large heat capacity member. Power supply cable. The magnetic body has an annular shape,
The power supply cable according to claim 1, wherein the covered cable is wound around the magnetic body a plurality of times.   The feed cable according to claim 1 or 6, wherein the feed cable is connected in series with a reactor in an electric circuit.   The power feeding cable according to claim 1 or 6, wherein a number of the power feeding cables are connected in series according to an inductance value of the reactor instead of a reactor required in the electric circuit. An automobile comprising the power feeding cable according to any one of claims 1 to 8,
The large heat capacity member is an automobile corresponding to a body of the automobile. A DC power supply for supplying DC power;
An AC motor driven by AC power;
A power conversion device that is provided between the DC power supply device and the AC motor and that performs power conversion between the DC power and the AC power;
The automobile according to claim 9, wherein the power supply cable is connected between the DC power supply device and the power conversion device. A DC power supply device that supplies DC power of a predetermined DC voltage;
An AC motor driven by AC power;
A power conversion device that is provided between the DC power supply device and the AC motor and that performs power conversion between the DC power and the AC power;
The power converter is
A converter circuit for performing voltage conversion of the DC power;
An inverter circuit for performing power conversion between the DC power converted by the converter circuit and a voltage for driving the AC motor,
The automobile according to claim 9, wherein the power supply cable is connected to the power converter so as to act as at least a part of a reactor in the converter circuit. A DC power supply for supplying DC power;
A three-phase AC motor driven by AC power;
A power conversion device that is provided between the DC power supply device and the AC motor and that performs power conversion between the DC power and the AC power;
The power feeding cable is connected between the power converter and the AC motor, and includes the three covered cables respectively corresponding to the three phases,
The magnetic body has an annular shape,
The automobile according to claim 9, wherein the three covered cables are arranged so as to contact an inner peripheral surface of the magnetic body.   The automobile according to any one of claims 9 to 12, wherein the AC motor is capable of driving at least one wheel.

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