JP2006262627A - Insulating member, power conversion device, and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insulating member for preventing damages caused by the contact with the joining section of a bus bar. <P>SOLUTION: An reinforcing section 42 is formed in a direction, where a positive electrode bus bar 30 is extended, in the clearance between the joining section 31 of the positive bus bar 30 and an insulation section 40. More specifically, when clockwise tightening torque is applied to a screw member (not shown) for joining the positive electrode bus bar 30 to other positive electrode bus bars at the joining section 31, the joining section 31 is moved in the direction of the positive bus bar 30 being extended, and the reinforcing section 42 is partially formed near a part, where the joining section 31 can be brought into contact with the insulation section 40, by the movement of the joining section 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an insulating member, a power conversion device including the insulating member, and a vehicle equipped with the power conversion device, and more particularly to a structure of an insulating member that insulates a bus bar disposed in the power conversion device from its surroundings.

Japanese Patent Laying-Open No. 2001-251089 (Patent Document 1) discloses a terminal connection device for connecting a terminal of a shielded wire to a terminal equipped in the device. In this terminal connection device, the terminal of the core wire of the shielded wire and the connection portion of the bus bar are coupled to each other on the insulating terminal block provided in the shield case (see Patent Document 1).
JP 2001-251089 A JP-A-11-111353 JP-A-9-69603 Japan Society for Invention and Innovation Open Technical Report No. 2004-503347

  In recent years, hybrid vehicles using a DC power source, an inverter, and a motor as a power source in addition to an engine have attracted attention and have already been put into practical use against the background of energy saving problems and environmental problems.

  This hybrid vehicle has more equipment than a conventional vehicle that uses only an engine as a power source. Therefore, in hybrid vehicles, it is particularly required to reduce the size of each device including a power conversion device such as an inverter. Due to this demand for miniaturization, there may occur a case where the terminal block cannot be secured in the power conversion device as in the terminal connection device disclosed in the above Japanese Patent Laid-Open No. 2001-251089.

  When a terminal block cannot be installed in the power conversion device, the bus bar disposed in the power conversion device is directly fastened with another bus bar or the like without using the terminal block. Therefore, the position of the fastening portion of the bus bar is not constrained, and when a tightening torque is applied to the screw member at the fastening portion, the position of the fastening portion is moved by the tightening torque. Thereby, in order to insulate a bus bar from the circumference | surroundings, the fastening part of a bus bar may contact the insulating member currently formed so that a bus bar and its fastening part may be surrounded, and an insulating member may be damaged.

  Therefore, the present invention has been made to solve such a problem, and an object thereof is to provide an insulating member that prevents breakage due to contact with a fastening portion of a bus bar.

  Another object of the present invention is to provide a power conversion device including an insulating member that prevents damage due to contact with a fastening portion of a bus bar.

  Furthermore, another object of the present invention is to provide a vehicle equipped with a power conversion device including an insulating member that prevents damage due to contact with a fastening portion of a bus bar.

  According to this invention, the insulating member is an insulating member that has a fastening portion fastened to another conductive path by the screw member, and the fastening portion insulates the bus bar in an unconstrained state from its surroundings, and is fastened An insulating portion formed so as to surround the portion, and a reinforcing portion partially formed in the vicinity of a portion where the fastening portion moved by the torque applied to the screw member can come into contact with the insulating portion.

  In the present invention, the bus bar insulated from the surroundings by the insulating member is directly fastened to another conductive path (such as a bus bar) at the fastening portion without using a fastening auxiliary component such as a terminal block. For this reason, the position of the fastening portion of the bus bar is not constrained by a fastening portion such as a fastening auxiliary component, and when torque is applied to the screw member, the position of the fastening portion can be moved by the torque. Here, in this insulating member, a reinforcing portion is partially provided in the vicinity of a portion where the fastening portion can come into contact with the insulating portion by the movement of the fastening portion, and this reinforcing portion increases the strength in the vicinity of the portion.

  Therefore, according to the insulating member of the present invention, when the torque is applied to the screw member at the fastening portion, it is possible to prevent damage to the insulating portion due to interference between the fastening portion of the bus bar and the insulating portion.

  Preferably, the shape of the surface of the reinforcing portion facing the fastening portion is formed along the surface shape of the fastening portion.

  In this insulating member, the reinforcing portion is in surface contact with the fastening portion. Thereby, the force generated between the fastening portion and the reinforcing portion is dispersed in the contact surface between the fastening portion and the reinforcing portion.

  Therefore, according to this insulating member, breakage of the reinforcing portion can be prevented.

  Preferably, the reinforcing portion is partially formed only in the vicinity of a portion where the fastening portion moved by the tightening torque applied to the screw member can come into contact with the insulating portion.

  In this insulating member, assuming that the screw member once tightened is not loosened, the reinforcing portion is formed only in the vicinity of the portion where the fastening portion can contact the insulating portion when the screw member is tightened.

  Therefore, according to this insulating member, the reinforcing portion is provided only in the minimum necessary part, and the cost can be reduced and the space can be saved.

  Preferably, the insulating portion and the reinforcing portion are integrally formed of an insulating resin.

  Therefore, according to this insulating member, the number of parts can be reduced.

  Further, according to the present invention, a power conversion device includes a power converter, a casing that stores the power converter, a bus bar that is stored in the casing and transmits and receives power to and from the power converter, and a bus bar around the power converter. Insulating member that insulates each component of the disposed power converter and the housing, and the bus bar is in an unconstrained state that is fastened by a screw member and another conductive path laid outside or inside the housing. The insulating member includes a fastening part, and the insulating member is partially formed in the vicinity of an insulating part formed so as to surround the fastening part and a part where the fastening part moved by the torque applied to the screw member can come into contact with the insulating part. Including a reinforcing portion.

  In the power conversion device according to the present invention, fixed fastening auxiliary parts such as a terminal block are not provided from the viewpoint of space saving and cost reduction. Therefore, as described above, when a torque is applied to the screw member, the position of the fastening portion can be moved by the torque of the fastening portion of the bus bar. Here, in this power conversion device, in the insulating member, a reinforcing portion is partially provided in the vicinity of a portion where the fastening portion can come into contact with the insulating portion by movement of the fastening portion, and the reinforcing portion is provided in the vicinity of the portion. Increase strength.

  Therefore, according to the power conversion device of the present invention, it is possible to prevent damage to the insulating portion due to contact between the fastening portion and the insulating portion while achieving space saving and cost reduction.

  Further, according to the present invention, the vehicle receives the DC power from the DC power source, the AC motor connected to the driving wheel and driving the driving wheel, and the DC power from the DC power source, and converts the received DC power into AC power. And the above-described power converter that outputs to the AC motor.

  Since the vehicle according to the present invention includes the above-described power conversion device, damage to the insulating portion due to contact between the fastening portion of the bus bar and the insulating portion is prevented while reducing the space and cost of the power conversion device. .

  Therefore, according to the vehicle of the present invention, the reliability of the vehicle can be improved without hindering the reduction in size and cost of the vehicle.

  According to this invention, damage to the insulating member due to contact with the fastening portion of the bus bar can be prevented.

  Further, since fastening auxiliary parts such as a terminal block are not used, space saving and cost reduction of the power conversion device can be achieved.

  Furthermore, the reliability of the vehicle can be improved without hindering the downsizing and cost reduction of the vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
FIG. 1 is a schematic configuration diagram of a hybrid vehicle shown as an example of a vehicle according to Embodiment 1 of the present invention. Referring to FIG. 1, this hybrid vehicle 10 includes a battery 12, a power control unit (hereinafter referred to as "PCU") 14, a power output device 16, front wheels 18R and 18L, and rear wheels. 20R, 20L.

  The battery 12 is a chargeable / dischargeable battery, for example, a secondary battery such as nickel metal hydride or lithium ion. The battery 12 is mounted on the rear side of the vehicle. The battery 12 supplies the generated DC power to the PCU 14 and stores the DC power output from the PCU 14.

  The PCU 14 is disposed in the engine room 22 in front of the vehicle. PCU 14 converts the DC voltage received from battery 12 into an AC voltage, and outputs the converted AC voltage to a motor generator (not shown, the same applies hereinafter) included in power output device 16. PCU 14 converts the AC voltage generated by the motor generator included in power output device 16 into a DC voltage, and outputs the converted DC voltage to battery 12.

  The power output device 16 includes an engine (not shown, the same applies hereinafter) and a motor generator, and is disposed in an engine room 22 in front of the vehicle. The power output device 16 generates power by a motor generator and / or engine, and outputs the generated power to a drive shaft to drive the front wheels 18R and 18L. The power output device 16 generates electric power with a motor generator using the rotational force from the front wheels 18R and 18L and the output of the engine, and outputs the generated electric power to the PCU 14.

  The front wheels 18R and 18L are drive wheels of the hybrid vehicle 10, and the rear wheels 20R and 20L are subordinate wheels.

  FIG. 2 is a plan view of the PCU 14 shown in FIG. In FIG. 2, only a part of the PCU 14 is shown enlarged. Referring to FIG. 2, PCU 14 includes a power conversion unit 24, a casing 26, a positive bus bar 30, a negative bus bar 32, screw members 34 and 36, and an insulating member 38.

  The power conversion unit 24 generally indicates a power converter such as an inverter or a converter. The power conversion unit 24 is arranged in an efficient layout in a limited space in the housing 26. The housing 26 stores the power conversion unit 24, the positive electrode bus bar 30, the negative electrode bus bar 32, the screw members 34 and 36, and the insulating member 38.

  Each of positive electrode bus bar 30 and negative electrode bus bar 32 is made of a metal member having excellent conductivity, for example, copper. Each of the positive electrode bus bar 30 and the negative electrode bus bar 32 has a plate shape, and fastening portions 31 and 33 are formed at the ends of the positive electrode bus bar 30 and the negative electrode bus bar 32, respectively. Specifically, the positive electrode bus bar 30 and the negative electrode bus bar 32 are juxtaposed in the housing 26 so that the wide surface faces the side. A fastening portion 31 is formed at the end of the positive electrode bus bar 30 so as to protrude laterally from the wide surface of the positive electrode bus bar 30 and the fastening surface is directed downward (backward in the drawing). Also, at the end portion of the negative electrode bus bar 32, a fastening portion 33 is formed which protrudes from the wide surface of the negative electrode bus bar 32 in the same direction as the fastening portion 31 of the positive electrode bus bar 30 and the fastening surface is directed downward. . The positive electrode bus bar 30 and the negative electrode bus bar 32 are fastened at the fastening portions 31 and 33 by other positive and negative electrode bus bars (both not shown, the same applies hereinafter) and screw members 34 and 36, respectively.

  Each of the screw members 34 and 36 is a screw-type fastening member, and includes, for example, a hexagon bolt and a hexagon nut. The screw member 34 fastens the positive bus bar 30 to another positive bus bar at the fastening portion 31 of the positive bus bar 30. The screw member 36 fastens the negative electrode bus bar 32 to another negative electrode bus bar at the fastening portion 33 of the negative electrode bus bar 32.

  The insulating member 38 is made of an insulating resin such as polybutylene terephthalate (hereinafter also referred to as “PBT”) having excellent insulating characteristics and moldability, and is fixed to the housing 26. The insulating member 38 is formed along the positive electrode bus bar 30 and the negative electrode bus bar 32 so as to surround each of the positive electrode bus bar 30 and the negative electrode bus bar 32. Also, the insulating member 38 is formed so as to surround each of the fastening portions 31 and 33 from the side also in the fastening portion 31 of the positive electrode bus bar 30 and the fastening portion 33 of the negative electrode bus bar 32. The insulating member 38 insulates the positive electrode bus bar 30 and the negative electrode bus bar 32 from each other and the periphery thereof.

  The PCU 14 is not provided with a terminal block for connecting the positive bus bar 30 (negative bus bar 32) to other bus bars because of a demand for space saving. For this reason, the positive electrode bus bar 30 (negative electrode bus bar 32) is directly fastened to the other bus bars by the screw members 34 (36). That is, the position of the fastening portion 31 (33) is not restricted by the terminal block or the like, and when torque is applied to the screw member 34 (36), the position of the fastening portion 31 (33) can be moved by the torque.

  Specifically, when a clockwise tightening torque is applied to the screw member 34 (36), the fastening portion 31 (33) has a direction in which the positive electrode bus bar 30 (negative electrode bus bar 32) is extended (downward in the drawing). ) When the fastening portion 31 (33) moves, the fastening portion 31 (33) can interfere with the insulating member 38 and the insulating member 38 can be damaged. In the first embodiment, in the vicinity of the interference portion. A reinforcing part is provided.

  3 is a plan view of the insulating member 38 shown in FIG. 2, and FIG. 4 is a side view of the insulating member 38 shown in FIG. Referring to FIGS. 3 and 4, insulating member 38 includes an insulating portion 40 and reinforcing portions 42 and 44. The insulating portion 40 is formed so as to surround the positive electrode bus bar 30 and the negative electrode bus bar 32 along the shape of the positive electrode bus bar 30 and the negative electrode bus bar 32. That is, the insulating portion 40 is formed so as to surround the fastening portions 31 and 32 along the shape of the fastening portion 31 of the positive electrode bus bar 30 and the fastening portion 33 of the negative electrode bus bar 32.

  The reinforcing portion 42 is provided in the gap between the fastening portion 31 of the positive bus bar 30 and the fastening portion 47 (the same shape as the fastening portion 31) of the other positive bus bar 46 fastened to the fastening portion 31 and the insulating portion 40. Is formed in the extending direction. That is, when a clockwise tightening torque is applied to a screw member 34 (not shown) for fastening the fastening portion 31 of the positive bus bar 30 to the fastening portion 47 of another positive bus bar 46, the fastening portions 31 and 47 are When the positive electrode bus bar 30 moves in the extending direction, the reinforcing portion 42 is partially formed in the vicinity of a portion where the fastening portions 31 and 47 can come into contact with the insulating portion 40 by the movement of the fastening portions 31 and 47. Has been.

  The shape of the surface of the reinforcing portion 42 facing the fastening portions 31 and 47 is formed along the side surface shape of the fastening portions 31 and 47. Thereby, when the fastening portions 31 and 47 are in contact with the reinforcing portion 42, the fastening portions 31 and 47 are in surface contact with the reinforcing portion 42. Therefore, the force received by the reinforcing portion 42 from the fastening portions 31 and 47 is dispersed in the contact surface, and the reinforcing portion 42 is prevented from being damaged.

  The reinforcing portion 44 is provided in the gap between the fastening portion 33 of the negative electrode bus bar 32 and the fastening portion 49 (the same shape as the fastening portion 33) of the other negative electrode bus bar 48 fastened to the fastening portion 33 and the insulating portion 40. Is formed in the extending direction. That is, when a clockwise tightening torque is applied to a screw member 36 (not shown) for fastening the fastening portion 33 of the negative bus bar 32 to the fastening portion 49 of another negative bus bar 48, the fastening portions 33, 49 are When the negative electrode bus bar 32 moves in the extending direction, the reinforcing portion 44 is partially formed in the vicinity of a portion where the fastening portions 33 and 49 can contact the insulating portion 40 by the movement of the fastening portions 33 and 49. Has been.

  The shape of the surface of the reinforcing portion 44 facing the fastening portions 33 and 49 is formed along the side surface shape of the fastening portions 33 and 49. Thereby, when the fastening portions 33 and 49 are in contact with the reinforcing portion 44, the fastening portions 33 and 49 are in surface contact with the reinforcing portion 44. Accordingly, the force received by the reinforcing portion 44 from the fastening portions 33 and 49 is dispersed in the contact surface, and the reinforcing portion 44 is prevented from being damaged.

  As described above, the insulating member 38 is made of an insulating resin such as PBT, and is easily molded by pouring the insulating resin into a mold that has the shape of the insulating portion 40 and the reinforcing portions 42 and 44 and thermosetting the resin. be able to.

  FIG. 5 is an overall block diagram showing a power train of hybrid vehicle 10 shown in FIG. Referring to FIG. 5, PCU 14 includes a boost converter 52, inverters 54 and 56, and a smoothing capacitor C. Power output device 16 includes motor generators MG1 and MG2, power split mechanism 58, gear 60, and engine ENG.

  Boost converter 52 boosts the DC voltage from battery 12 and outputs the boosted DC voltage to inverters 54 and 56. Boost converter 52 steps down DC voltage received from inverters 54 and 56 to charge battery 12.

  Inverter 54 converts the DC voltage from boost converter 52 into an AC voltage to drive motor generator MG1. Inverter 54 rectifies the AC voltage generated by motor generator MG 1, and outputs the rectified DC voltage to boost converter 52.

  Inverter 56 converts the DC voltage from boost converter 52 into an AC voltage to drive motor generator MG2. Inverter 56 rectifies the AC voltage generated by motor generator MG 2, and outputs the rectified DC voltage to boost converter 52.

  Motor generator MG1 is incorporated in hybrid vehicle 10 as operating as a generator driven by engine ENG. Motor generator MG2 is incorporated in hybrid vehicle 10 as an electric motor that drives front wheels 18R and 18L, which are drive wheels of hybrid vehicle 10.

  Motor generators MG1 and MG2 are rotating electrical machines, and include, for example, a three-phase AC synchronous motor generator. Motor generator MG1 generates a three-phase AC voltage using the output of engine ENG, and outputs the generated three-phase AC voltage to inverter 54. Motor generator MG1 generates driving force by the three-phase AC voltage received from inverter 54, and also starts engine ENG. Motor generator MG <b> 2 generates drive torque of hybrid vehicle 10 by the three-phase AC voltage received from inverter 56. Motor generator MG <b> 2 generates a three-phase AC voltage and outputs it to inverter 56 during regenerative braking of hybrid vehicle 10.

  Engine ENG drives front wheels 18R, 18L via power split mechanism 58 and gear 60, and applies rotational force to motor generator MG1. Engine ENG starts upon receiving a driving force from motor generator MG1.

  The power split mechanism 58 splits the output from the engine ENG into the driving force of the front wheels 18R, 18L and the rotational force applied to the motor generator MG1. Power split device 58 transmits the driving force from motor generator MG1 to engine ENG when engine ENG is started. Gear 60 decelerates the rotational speed from motor generator MG2 and power split mechanism 58 and outputs the reduced speed to front wheels 18R, 18L.

  The insulating member 38 includes a bus bar fastening portion between the boost converter 52 and the battery 12, a bus bar fastening portion between the boost converter 52 and the inverters 54, 56, a fastening portion between the inverter 54 and the motor generator MG1, Further, it is used at a fastening portion between inverter 56 and motor generator MG2.

  As described above, according to the first embodiment, since the reinforcing portions 42 and 44 are provided on the insulating member 38, the fastening portion is provided when a tightening torque is applied to the screw members 32 and 34 in the fastening portions 31 and 33. It is possible to prevent the insulation member 38 from being damaged due to the interference between the insulation members 31 and 33 and the insulation part 40.

  Moreover, since the shape of the opposing surface with the fastening parts 31 and 33 of the reinforcement parts 42 and 44 was formed along the surface shape of the fastening parts 31 and 33, respectively, the stress in the reinforcement parts 42 and 44 was relieved, As a result, Breakage of the reinforcing portions 42 and 44 can be prevented.

  Furthermore, since the insulating member 38 is made of an insulating resin and the reinforcing portions 42 and 44 are integrally formed with the insulating portion 40, the number of parts can be reduced.

[Embodiment 2]
FIG. 6 is a plan view of an insulating member according to Embodiment 2 of the present invention. Referring to FIG. 6, this insulating member 38A further includes reinforcing portions 43 and 45 in the configuration of insulating member 38 in the first embodiment shown in FIGS.

  The reinforcing portion 43 is used when loosening a screw member (not shown, the same applies hereinafter) for fastening the fastening portion 31 of the positive bus bar 30 with a fastening portion (not shown, the same applies hereinafter) of another positive bus bar, or When the screw member is tightened from the fastening portion side of the other positive electrode bus bar, the fastening portion 31 is partially formed in the vicinity of the portion where the fastening portion 31 can come into contact with the insulating portion 40 by the movement of the fastening portion 31. Specifically, the reinforcing portion 43 is formed on the side opposite to the reinforcing portion 42 with the fastening portion 31 interposed therebetween. The shape of the reinforcing portion 43 is also formed along the side shape of the fastening portion 31, similarly to the reinforcing portion 42.

  The reinforcing portion 45 is used when loosening a screw member (not shown, the same applies hereinafter) for fastening the fastening portion 33 of the negative electrode bus bar 32 with a fastening portion (not shown, the same applies hereinafter) of another negative electrode bus bar, or When the screw member is tightened from the fastening portion side of the other negative electrode bus bar, the fastening portion 33 is partially formed near the portion where the fastening portion 33 can come into contact with the insulating portion 40 by the movement of the fastening portion 33. Specifically, the reinforcing portion 45 is formed on the opposite side of the reinforcing portion 44 with the fastening portion 33 interposed therebetween. The shape of the reinforcing portion 45 is also formed along the side surface shape of the fastening portion 33, similarly to the reinforcing portion 44.

  The overall configuration and the power train configuration of the hybrid vehicle according to the second embodiment are the same as those of hybrid vehicle 10 according to the first embodiment.

  As described above, according to the second embodiment, when the screw member is loosened, the insulating member 38A is prevented from being damaged by the torque applied when the screw member is loosened. Further, the insulating member 38A can be prevented from being damaged regardless of the tightening direction of the screw member.

  In the above, the shapes of the positive electrode bus bar 30, the negative electrode bus bar 32, and the insulating members 38, 38A are not limited to the shapes in the above-described first and second embodiments, and the technical idea of the present invention is as follows. It can be applied to other shapes.

  Further, in the above, the positive electrode bus bar 30 and the negative electrode bus bar 32 are provided side by side, and the insulating members 38 and 38A handle the positive electrode bus bar 30 and the negative electrode bus bar 32 integrally to insulate them from the surroundings. May separately insulate the positive electrode bus bar or the negative electrode bus bar from the surroundings.

  Further, in the above, the PCU 14 to which the insulating members 38 and 38A are applied is assumed to be mounted on the hybrid vehicle, but the scope of application of the present invention is not limited to that applied to the hybrid vehicle. It can also be applied to electric vehicles and fuel cell vehicles.

  In the above description, boost converter 52 and inverters 52 and 54 correspond to “power converter” in the present invention. Battery 12 corresponds to “DC power supply” in the present invention, and motor generator MG2 corresponds to “AC motor” in the present invention.

  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 meanings equivalent to the scope of claims for patent and all modifications within the scope.

1 is a schematic configuration diagram of a hybrid vehicle shown as an example of a vehicle according to Embodiment 1 of the present invention. It is a top view of PCU shown in FIG. It is a top view of the insulating member shown in FIG. FIG. 3 is a side view of the insulating member shown in FIG. 2. FIG. 2 is an overall block diagram showing a power train of the hybrid vehicle shown in FIG. 1. It is a top view of the insulating member in Embodiment 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Hybrid vehicle, 12 Battery, 14 PCU, 16 Power output device, 18R, 18L Front wheel, 20R, 20L Rear wheel, 22 Engine room, 24 Power conversion part, 26 Case, 30, 46 Positive bus bar, 31, 33, 47 , 49 Fastening part, 32, 48 Negative electrode bus bar, 34, 36 Screw member, 38 Insulating member, 40 Insulating part, 42-45 Reinforcement part, 52 Boost converter, 54, 56 Inverter, 58 Power split mechanism, 60 gear, C smooth Capacitor, MG1, MG2 Motor generator, ENG engine.

Claims (6)

An insulating member having a fastening portion fastened to another conductive path by a screw member, and the fastening portion insulating a non-restrained bus bar from its surroundings;
An insulating part formed so as to surround the fastening part;
An insulating member provided with the reinforcement part partially formed in the vicinity of the site | part which the said fastening part moved by the torque added to the said screw member can contact with the said insulating part.   The insulating member according to claim 1, wherein a shape of a surface of the reinforcing portion facing the fastening portion is formed along a surface shape of the fastening portion.   The said reinforcement part is partially formed only in the vicinity of the site | part which the said fastening part moved by the fastening torque added to the said screw member can contact with the said insulation part. Insulating member.   The insulating member according to any one of claims 1 to 3, wherein the insulating portion and the reinforcing portion are integrally formed of an insulating resin. A power converter;
A housing for storing the power converter;
A bus bar stored in the housing for transmitting and receiving power to and from the power converter;
An insulating member that insulates the bus bar from each component of the power converter and the casing disposed around the bus bar;
The bus bar includes a fastening portion in an unconstrained state that is fastened by a screw member and another conductive path laid outside or inside the housing,
The insulating member is
An insulating part formed so as to surround the fastening part;
A power conversion device, comprising: a reinforcing portion partially formed near a portion where the fastening portion moved by torque applied to the screw member can come into contact with the insulating portion. DC power supply,
An AC motor coupled to the drive wheels to drive the drive wheels;
The vehicle provided with the power converter device of Claim 5 which receives the direct-current power from the said direct-current power supply, converts the received direct-current power into alternating current power, and outputs it to the said alternating current motor.

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