Terminal structure of electrical device

Abstract

The invention provides a terminal structure of an electrical device, which is provided with a plurality of terminals for electrically connecting with an external device in a frame body and can reduce the size of the frame body. A power conversion device (100) is provided with bus bars (152-154) and a case (101). The housing (101) has an opening (101c) for insertion of a tool. Each of the connection parts (152a, 153a, 154a) of the bus bars (152-154) has a through hole (152b, 153b, 154b) through which a bolt for connection passes. The connecting sections (152a, 153a, 154a) are disposed so that, when viewed from one side in the left-right direction, the normal lines (Ax152, Ax153, Ax154) pass through the sites (P12-P14) and pass through the tool insertion opening (101c). When the distance between the point of intersection between the normal line (Ax152) in the vertical direction and the connecting surface of the connecting part (152a) and the focal point of the normal line (Ax153) and the connecting surface of the connecting part (153a) is set as L7, the distance L11 between the part (P12) and the part (P13) is shorter than the distance L7.

Description

Technical Field

[0001] The present invention relates to a terminal structure of an electric device. Background Art

[0002] In recent years, the number of vehicles equipped with electric motors as driving sources for traveling has been increasing. Such vehicles are equipped with high-voltage batteries for supplying electric power to the electric motors. In addition, the vehicles are also equipped with power conversion devices for converting direct current supplied from the batteries into alternating current.

[0003] The power converter, the motor, and the battery form a mutual power supply path by connecting wiring extending from the motor and the battery to the terminals of the power converter. Patent Documents 1 and 2 disclose connection structures between the power converter and the motor.

[0004] Patent Document 1 discloses a structure in which a power conversion device is placed on a motor case and wiring of the power conversion device is connected to motor wiring via a connector assembly. The connector assembly of Patent Document 1 has three terminals arranged along the peripheral surface of the motor case.

[0005] Patent document 2 discloses a structure in which a power conversion device is also accommodated in a housing that accommodates the stator and rotor of the motor. In the housing of patent document 2, a large opening is provided on one side that accommodates the power conversion device. The opening is used to insert a tool when accommodating the power conversion device in the housing and connecting the wiring of the power conversion device to the terminal of the motor. The large opening of the housing is closed by a cover.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application No. 2022-519384

[0009] Patent Document 2: Japanese Patent Application Publication No. 2021-52499

[0010] However, although Patent Document 1 does not explicitly describe the wiring extending from the power conversion device and the motor, the housing and the cover covering the connector assembly, the wiring is covered with a housing or the like to prevent objects from contacting the wiring from the outside. Fig.15 As shown, the terminals of the connector assembly Since the motor housing 900 is disposed along the outer peripheral surface, it is necessary to cover each terminal. The housing 905 has a large opening 905a and a cover 906. That is, when the wiring of the motor is to be connected to each terminal 902 to 904, it is considered to use a tool 910 to fasten them together with bolts BLT. In this case, each terminal The terminals 905 are arranged along the peripheral surface of the motor housing 900. Therefore, when the imaginary planes L902, L903, and L904 are drawn along the connecting portions 902a, 903a, and 904a, the angles between the adjacent imaginary planes L902, L903, and L904 are greater than 180°. Therefore, the center lines that are orthogonal to the imaginary planes L902, L903, and L904 and pass through the centers of the fastening holes 902b, 903b, and 904b are radially divergent from the inside of the housing 905 toward one side of the opening 905a. Therefore, the opening 905a that is required to be larger when the wiring of the motor is connected to each terminal 902 to 904 in advance.

[0011] When a large opening 905a is required for inserting a tool as described above, the size of the housing 905 and the cover 906 must be increased. This is contrary to the potential demand for reducing the occupied space of various electrical devices represented by power conversion devices.

[0012] Furthermore, in the above description, the power conversion device in the vehicle is taken as an example of the electric device, but the same problem is pointed out in other electric devices. Summary of the invention

[0013] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a terminal structure of an electric device in which a plurality of terminals for electrical connection with an external device are provided in a housing and the size of the housing can be reduced.

[0014] The terminal structure of an electrical device according to one embodiment of the present invention comprises a plurality of terminals and a frame as components. The plurality of terminals include at least a first terminal and a second terminal adjacent to each other, and the plurality of terminals are electrically connected to an external device respectively, and each of the plurality of terminals has a connection portion, and the connection portion is arranged to extend from a predetermined reference plane to a direction orthogonal to the reference plane. The frame accommodates the plurality of terminals, and has a tool insertion opening in a part of the outer wall, and the tool insertion opening can be inserted with a tool for electrically connecting to the plurality of terminals.

[0015] In the terminal structure of the electrical device involved in this embodiment, the connection portion of each of the plurality of terminals has a connection surface as a plane and a through hole for inserting a bolt for the electrical connection. Here, the following first normal and second normal are assumed. The first normal is an imaginary line that passes through the radial center of the through hole in the connection portion of the first terminal and extends along the normal direction of the connection surface in the connection portion of the first terminal. The second normal is an imaginary line that passes through the radial center of the through hole in the connection portion of the second terminal and extends along the normal direction of the connection surface in the connection portion of the second terminal.

[0016] In the above case, when viewed from a direction orthogonal to the reference plane, the connecting portion of the first terminal and the connecting portion of the second terminal are configured such that a distance between a portion where the first normal passes through the tool insertion opening and a distance between a portion where the second normal passes through the tool insertion opening is shorter than a distance between a portion where the connecting surface in the connecting portion of the first terminal and the first normal intersects and a portion where the connecting surface in the connecting portion of the second terminal and the second normal intersects.

[0017] In the terminal structure of the electrical device involved in the above-mentioned method, the connection part of the first terminal and the connection part of the second terminal are arranged so that the distance between the first normal line and the second normal line passing through the tool insertion opening is shorter than the distance between the intersections of the normal lines (first normal line, second normal line) corresponding to the connection surfaces of the first terminal and the second terminal. Fig.15 Compared with the case where the opening portion for inserting the tool in the frame body can be reduced in size, the frame body can be reduced in size.

[0018] In the terminal structure of the electrical device involved in the above-mentioned method, the following first imaginary plane and second imaginary plane are assumed. The first imaginary plane is an imaginary plane along the connection surface of the connection portion of the first terminal. The second imaginary plane is an imaginary plane along the connection surface of the connection portion of the second terminal. Here, the shortest distance from the position where the first imaginary plane intersects with the first normal to a part of the outer wall is set as the first distance, and the shortest distance from the position where the second imaginary plane intersects with the second normal to a part of the outer wall is set as the second distance.

[0019] In the above case, the first imaginary plane intersects with the second imaginary plane, and the reference plane can also be specified in a direction orthogonal to the intersection line of the first imaginary plane and the second imaginary plane. In addition, the connecting portion of the first terminal and the connecting portion of the second terminal can also be configured so that the first imaginary plane intersects with the second imaginary plane at an obtuse angle, and the first normal line and the second normal line pass through the tool insertion opening when viewed from a direction orthogonal to the reference plane. Moreover, the connecting portion of the first terminal and the connecting portion of the second terminal can also be distributed so that the first normal line and the second normal line intersect on the side opposite to the side where the connecting portions of the first terminal and the second terminal are configured, relative to a position that is half of the shorter distance between the first distance and the second distance.

[0020] In the terminal structure of the electrical device involved in the above-mentioned method, the connection part (first connection part) of the first terminal and the connection part (second connection part) of the second terminal are arranged so that the imaginary planes (first imaginary plane, second imaginary plane) along the connection surfaces of each other intersect each other at an obtuse angle, so that compared with the case where the connection parts of all the terminals are arranged in a manner parallel to each other with the imaginary planes, the space occupied by the connection parts of the plurality of terminals can be reduced by an amount corresponding to the inclination of at least one of the first connection part and the second connection part. Therefore, in the terminal structure of the electrical device involved in the above-mentioned method, the size of the frame that accommodates the plurality of terminals is further effectively miniaturized.

[0021] In addition, in the terminal structure of the electrical device involved in the above-mentioned aspect, when viewed from a direction perpendicular to the reference plane, the first connection portion and the second connection portion are arranged so that their normal lines intersect each other at the position of the half on the side opposite to the side where the connection portions of the first terminal and the second terminal are arranged, so that all normal lines of the connection portions of the plurality of terminals are parallel to each other, such as Fig.15 Compared with the case where the opening for inserting the tool in the frame body is radially spread outward in this way, the size of the opening for inserting the tool in the frame body can be reduced in size. Therefore, the size of the frame body can be further effectively reduced in size.

[0022] In the terminal structure of the electrical device involved in the above-mentioned embodiment, the connecting portion of the first terminal and the connecting portion of the second terminal may be arranged so that the first normal line and the second normal line intersect outside the frame when viewed from a direction perpendicular to the reference plane.

[0023] In the terminal structure of the electrical device involved in the above-mentioned method, the intersection of the first normal and the second normal when viewed from a direction perpendicular to the reference plane is located on the outside of the frame (outside of the tool insertion opening). Therefore, compared with the case where the intersection is located on the inside of the frame, the distance between the first terminal and the second terminal and the tool insertion opening can be shortened, and the size of the tool insertion opening in the frame can be miniaturized.

[0024] In the terminal structure of the electric device according to the above aspect, the plurality of terminals may be arranged so that a gap between adjacent connection portions is equal to or larger than an insulation distance.

[0025] In the terminal structure of the electrical device involved in the above-mentioned aspect, the gap between adjacent connecting parts is set to be greater than the insulation distance, so that the insulator such as the rib does not need to be inserted between the connecting parts. Therefore, even if the first imaginary plane and the second imaginary plane intersect at a concave obtuse angle when viewed from the tool insertion opening side, the tool can be easily inserted into each connecting part, and the increase in manufacturing cost can be suppressed.

[0026] In the terminal structure of the electrical device involved in the above-mentioned method, it can also be that the tool insertion opening is formed in a direction orthogonal to the direction of specifying the first distance and the second distance within the reference plane, and the opening length of the tool insertion opening is shorter than the arrangement length of the connecting parts among the multiple terminals.

[0027] In the terminal structure of the electrical device involved in the above-mentioned method, the opening length of the tool insertion opening in the frame is set to be shorter than the arrangement length of the connection parts in the plurality of terminals in the same direction (a direction orthogonal to the direction defining the first distance and the second distance), so that the opening for inserting the tool can be provided in a narrow area. Therefore, it is effective to suppress the outer dimensions of the electrical device to be small.

[0028] In the terminal structure of the electrical device involved in the above-mentioned method, the electrical device can also be a power conversion device that converts direct current into alternating current, and the external device can also be a three-phase AC motor that receives a supply of three-phase AC power and rotates. In this case, the multiple terminals can also be arranged in a power supply path for supplying power to the three-phase AC motor, and are composed of the first terminal, the second terminal, and a third terminal that is arranged in a manner adjacent to the connecting portion of the second terminal. In addition, the following third imaginary plane and third normal are assumed. The third imaginary plane is an imaginary plane along the connecting surface of the connecting portion of the third terminal. The third normal is an imaginary line that passes through the radial center of the through hole in the connecting portion of the third terminal and extends along the normal direction of the connecting surface in the connecting portion of the third terminal. Here, the shortest distance from the location where the third imaginary plane intersects with the third normal to a portion of the outer wall is set as the third distance.

[0029] In the above case, the connection portion of the third terminal may be configured such that the second imaginary plane intersects the third imaginary plane at an obtuse angle, and the second normal line and the third normal line pass through the tool insertion opening when viewed from a direction orthogonal to the reference plane. In addition, the connection portion of the third terminal may be configured such that the second normal line and the third normal line intersect each other at a position that is half of the shorter distance between the second distance and the third distance, on a side opposite to a side where the connection portions of the second terminal and the third terminal are arranged.

[0030] In the terminal structure of the electrical device involved in the above-mentioned method, a power conversion device is applied as an example of the electrical device, and a three-phase AC motor is applied as an example of the external device. Moreover, in this case, regarding the third terminal, the connecting portion is also arranged in the above-mentioned manner relative to the second connecting portion. Therefore, even when the three connecting portions are accommodated in the frame, the outer dimensions of the frame can be miniaturized.

[0031] In the terminal structure of the electrical device involved in the above-mentioned method, the connecting portion of the second terminal and the connecting portion of the third terminal may be arranged in the following posture: when viewed from a direction orthogonal to the reference plane, the second normal line and the third normal line intersect on the outside of the frame.

[0032] In the terminal structure of the electrical device involved in the above-mentioned method, the intersection of the second normal and the third normal when viewed from a direction perpendicular to the reference plane is located on the outside of the frame (outside of the tool insertion opening). Therefore, compared with the case where the intersection is located on the inside of the frame, the distance between the third terminal and the tool insertion opening can be shortened, and the size of the tool insertion opening can be miniaturized.

[0033] In the terminal structure of the electrical device involved in the above-mentioned method, when viewed from a direction perpendicular to the reference plane, the direction connecting the part through which the first normal line passes and the part through which the second normal line passes in the tool insertion opening is set as the first direction, and the direction perpendicular to the first direction on the reference plane is set as the second direction. In addition, the following first imaginary line and second imaginary line are assumed. The first imaginary line is an imaginary line that passes through the radial center of the through hole in the connecting part of the first terminal and extends along the second direction. The second imaginary line is an imaginary line that passes through the radial center of the through hole in the connecting part of the second terminal and extends along the second direction.

[0034] In the above case, the portion where the first normal line passes through the tool insertion opening and the portion where the second normal line passes through the tool insertion opening may be located in a region between the first imaginary line and the second imaginary line in the first direction.

[0035] In the terminal structure of the electrical device of the above-mentioned embodiment, the connection parts of the first terminal and the second terminal are arranged so that the first normal line and the second normal line respectively pass through the opening for inserting the tool and are located in the area between the first imaginary line and the second imaginary line in the first direction. Fig.15 Compared with the case where the light spreads radially outward in this way, the size of the opening for inserting the tool in the frame can be reduced, and the size of the frame can also be reduced.

[0036] In the terminal structure of the electrical device involved in the above-mentioned method, the electric motor may also be a driving electric motor of the vehicle mounted in the powertrain chamber of the vehicle, and has a motor housing as a shell. In addition, a transmission may be mounted in the powertrain chamber, the transmission is arranged adjacent to the electric motor, and has a bridge housing as a shell. In this case, the frame may be configured so that, on the housing of at least one of the motor housing and the bridge housing, the tool insertion opening faces the input direction side of the collision load assumed in the vehicle, and the end of the frame on the input direction side is coplanar with the motor housing or the bridge housing or is located on the side opposite to the input direction compared with them.

[0037] In the terminal structure of the electric device involved in the above-mentioned method, the power conversion device as the electric device is mounted in the powertrain room of the vehicle, and the power conversion device is arranged in such a way that the opening for inserting a tool faces the input direction of the load assumed for the vehicle. In addition, the frame of the power conversion device is arranged in such a way that the end in the above-mentioned input direction is coplanar with the motor housing or the bridge housing or is set back from it.

[0038] Therefore, in the terminal structure of the electric device according to the above aspect, even if a collision load is input to the vehicle, the load is not input intensively to the power conversion device, and high safety can be ensured.

[0039] Effects of the Invention

[0040] In the terminal structure of the electric device according to each of the above-mentioned aspects, a plurality of terminals for electrical connection with external devices are provided in the housing, and the size of the housing can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram showing the structure of a vehicle to which the terminal structure of the electric device according to the first embodiment of the present invention is applied.

[0042] Figure 2 This is a front view showing the arrangement of the power conversion device.

[0043] Figure 3 It is a side view showing the arrangement of the power conversion device.

[0044] Figure 4 It is a plan view showing the external appearance structure of the power conversion device.

[0045] Figure 5 It is a perspective view showing the internal structure of the AC connector part.

[0046] Figure 6 It is an expanded perspective view showing the internal structure of the AC connector part.

[0047] Figure 7 Yes means Figure 5 and Figure 6 The cross-sectional view taken along the line VII-VII of is a cross-sectional view showing the arrangement of the connection portions of the busbars in the AC busbars.

[0048] Figure 8 It is a perspective view showing the internal structure of an AC connector portion in the terminal structure of an electric device according to the second embodiment of the present invention.

[0049] Fig. 9 Yes means Figure 8 The cross-sectional view taken along the line IX-IX is a cross-sectional view showing the arrangement structure of the connection portion of each busbar.

[0050] Fig.10 It is a perspective view showing the internal structure of an AC connector portion in a terminal structure of an electric device according to a third embodiment of the present invention.

[0051] Fig.11 Yes means Fig.10 The cross-sectional view taken along the line XI-XI of FIG. 1 is a cross-sectional view showing the arrangement structure of the connection portion of each busbar.

[0052] Fig.12 It is a schematic diagram showing the arrangement of the connection parts in the first embodiment.

[0053] Fig.13 It is a schematic diagram showing the arrangement of the connection part in the second embodiment.

[0054] Fig.14 It is a cross-sectional view showing the arrangement of the connection portion of each bus bar in the AC connector unit according to the comparative example.

[0055] Fig.15 It is a cross-sectional view showing the arrangement structure of the connection portion of each busbar in the electric device according to the conventional technology.

[0056] Explanation of symbols

[0057] 100, 160, 170 Power conversion devices (electrical equipment)

[0058] 101, 201, 301, 401, 402 housing (frame)

[0059] 101c, 201c, 301c, 401c, 402c tool insertion opening

[0060] 150, 250, 350AC connector

[0061] 151, 251, 351AC busbar

[0062] 152, 252U phase busbar (terminal)

[0063] 152a, 252a connection part

[0064] 153, 253V phase busbar (terminal)

[0065] 153a, 253a connection part

[0066] 154, 254W phase busbar (terminal)

[0067] 154a, 254a connection part

[0068] 155, 255, 355 caps

[0069] 352, 353, 452, 453, 462, 463 busbars (terminals)

[0070] 352a, 353a, 552a, 453a, 462a, 463a connecting parts. DETAILED DESCRIPTION

[0071] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the embodiments described below are merely illustrative of the present invention, and the present invention is not limited to the embodiments described below except for its essential configuration.

[0072] [First embodiment]

[0073] 1. Structure of vehicle V

[0074] use Figure 1 The structure of a vehicle V to which the terminal structure of the electric device according to the first embodiment of the present invention is applied is described. In addition, hereinafter, the front-rear direction of the vehicle V is simply described as the "front-rear direction", the left-right direction (vehicle width direction) of the vehicle V is simply described as the "left-right direction", and the up-down direction of the vehicle V is simply described as the "up-down direction".

[0075] like Figure 1 As shown, the vehicle V is equipped with a powertrain PT, a power conversion device 100 , a high voltage battery 200 , and a low voltage battery 300 .

[0076] The vehicle V is a so-called hybrid electric vehicle (HEV), and is equipped with an engine E and a motor M that function as driving sources for traveling, that is, driving sources of the vehicle V (wheels W). The powertrain PT includes the engine E and the motor M. In addition to the engine E and the motor M, the powertrain PT also includes a transmission TM and a differential gear DF.

[0077] The motor M is a three-phase AC motor that rotates by receiving a three-phase AC power supply, and includes: an output shaft; a rotor having a permanent magnet disposed around the output shaft; and a stator, which is disposed on the outer periphery of the rotor and is formed by winding coils around a plurality of teeth. The plurality of coils are composed of a U-phase coil, a V-phase coil, and a W-phase coil, and different currents are supplied to the coils of each phase.

[0078] The transmission TM is connected to the motor M, and changes the speed of the rotation input from the motor M and outputs it. The differential gear DF ​​transmits the rotation output from the transmission TM to the wheels W via the drive shaft S and the like.

[0079] In the present embodiment, as an example, a parallel hybrid electric vehicle is used as a vehicle V, and it is possible to travel based on the driving force of the motor M alone, based on the driving force of both the motor M and the engine E, and based on the driving force of the engine E alone. In addition, the vehicle V can perform deceleration regeneration, and the motor M generates electricity through the transmission force from the wheels W when the vehicle V is decelerated.

[0080] The high voltage battery 200 is a battery that exchanges electric power with the electric motor M. When the electric motor M is driven as a driving source for traveling, the high voltage battery 200 supplies electric power to the electric motor M. On the other hand, when the electric motor M is driven as a generator when the vehicle V is decelerating, the high voltage battery 200 stores the electric power generated by the electric motor M.

[0081] The power conversion device 100 converts direct current power from the high-voltage battery 200 into alternating current power and supplies the alternating current to the motor M. Specifically, the power conversion device 100 converts direct current power into three-phase alternating current power.

[0082] Furthermore, when the motor M is driven as a generator during deceleration of the vehicle V, the power conversion device 100 converts the AC power generated by the motor M into DC power and supplies the DC power to the high voltage battery 200 .

[0083] The low voltage battery 300 is a battery for supplying electric power to electrical components provided in various parts of the vehicle V. The low voltage battery 300 is a battery having a lower nominal voltage than the high voltage battery 200 .

[0084] The high voltage battery 200 is, for example, a lithium ion battery or a nickel metal hydride battery having a nominal voltage of 24V or more, whereas the low voltage battery 300 is, for example, a lead battery or a lithium ion battery having a nominal voltage of 12V or 24V.

[0085] In this embodiment, the powertrain PT, the power conversion device 100 and the low voltage battery 300 are housed in a powertrain room R1 defined in the front of the vehicle V. The high voltage battery 200 is mounted under the floor of a vehicle room R2 defined behind the powertrain room R1.

[0086] Furthermore, the vehicle V is also equipped with a PCM (powertrain control module) 400 which is a controller that performs overall control of a powertrain PT including the electric motor M and the engine E.

[0087] 2. Configuration of the Power Converter 100

[0088] use Figure 2 and Figure 3 The arrangement of the power conversion device 100 in the powertrain room R1 will be described. Figure 2 This is a front view of the power conversion device 100 and its peripheral devices as viewed from the front side of the vehicle V. Figure 3 This is a side view of the power conversion device 100 and the motor M as viewed from the left side of the vehicle V.

[0089] like Figure 2 As shown, in the powertrain room R1, the engine E, the motor M, and the transmission TM are arranged in order from the right. The engine E has an engine lower portion 501 and an engine upper portion 502 arranged above the engine lower portion 501. The motor M is arranged adjacent to the engine lower portion 501 of the engine E on the left.

[0090] The motor M has a first motor case 511 and a second motor case 521 as housings. The first motor case 511 is joined to the left outer surface of the engine lower portion 501 , and the second motor case 521 is connected to the left side of the first motor case 511 without a gap.

[0091] The transmission TM has an axle housing 531 as a housing. The axle housing 531 has a conical shape in which the cross-sectional size gradually decreases from the right to the left.

[0092] The power conversion device 100 is arranged in a portion from above the second motor housing 521 to above the bridge housing 531 in the left-right direction of the vehicle V. Figure 3 As shown, when the motor M and the power converter 100 are viewed from the left, a portion of the lower surface 101d of the housing (frame) 101 of the power converter 100 abuts against the second motor housing 521, and the remaining portion is separated upward from the second motor housing 521.

[0093] The power conversion device 100 has an AC connector 150 at the front in the front-rear direction of the vehicle V. The AC connector 150 has a bus bar (terminal) for connecting to the motor M, and is formed so that the lower surface 101d of the housing 101 is located below the other parts of the power conversion device 100. In addition, a cover 155 is attached to the front side of the housing 101. The cover 155 closes the tool insertion opening provided at the front of the housing 101. The tool insertion opening will be described later.

[0094] Here, assuming an imaginary plane L that abuts against the front end portion 511a of the first motor housing 511 of the motor M and extends in the up and down directions, the front end portion 150a (the front surface of the cover 155) of the AC connector portion 150 in the power conversion device 100 is consistent with the imaginary plane L or is located on the rear side compared to the imaginary plane L.

[0095] The housing 101 includes a housing body 101a with an opening at the top and a housing cover 101b that closes the opening of the housing body 101a. The PCM connector 141 protrudes upward from the upper surface 101e of the housing 101. Figure 1 ) is connected to the power conversion device 100 via the PCM connector 141.

[0096] 3. Structure of the Power Converter 100

[0097] use Figure 4 The structure of the power conversion device 100 will be described. Figure 4 This is a plan view of the power conversion device 100 as viewed from above the vehicle V.

[0098] like Figure 4 As shown, the power conversion device 100 includes a DC connector unit 110, a noise removal unit 120, a smoothing unit 130, a power module unit 140, and an AC connector unit 150, which are housed inside a housing body 101a in a housing 101. The DC connector unit 110, the noise removal unit 120, the smoothing unit 130, the power module unit 140, and the AC connector unit 150 are arranged in order from the rear side to the front side in the front-rear direction of the vehicle V.

[0099] Here, the center line CL2 of the AC connector unit 150 in the left-right direction is offset to the right relative to the center line CL1 of the other parts of the power conversion device 100 except the AC connector unit 150 (arrow A1). Figure 2 As shown, the AC connector portion 150 is arranged with the center line CL2 offset to the right so that the right outer surface 150 b thereof abuts against the first motor case 511 of the motor M without a gap.

[0100] The DC connector 110 has a plurality of terminals for connection with the high voltage battery 200. The noise removal unit 120 is a functional unit for preventing high frequency noise from leaking from the power conversion device 100, and is configured to include a ferrite core, for example. The noise removal unit 120 is inserted into the power flow path provided between the DC connector 110 and the smoothing unit 130.

[0101] The smoothing unit 130 is a functional unit for smoothing direct current, and is configured to include a smoothing capacitor (a film capacitor as an example). The smoothing unit 130 is inserted into a power flow path provided between the noise removal unit 120 and the power module unit 140 .

[0102] The power module unit 140 includes: a module body having a plurality of IGBTs (Insulated Gate Bipolar Transistors); and a control circuit substrate connected to the module body and electrically controlling the IGBTs in the module body. The PCM connector 141 is connected to the control circuit substrate. The control unit formed on the control circuit substrate receives instructions from the PCM 400 to control the circuit including the IGBTs of the module body, thereby changing the conversion amount between direct current and alternating current, etc.

[0103] In the power module unit 140 , the IGBT of the module body is a power semiconductor and is provided to correspond to the U phase, the V phase, and the W phase, respectively.

[0104] Here, in this embodiment, the module body includes a plurality of IGBTs, but the power module is not limited to IGBTs, and for example, a known power module such as MOSFET (Metal Oxide Semiconductor Field Effect Transistor) can be adopted.

[0105] The module body of the power module part 140 is inserted into the power flow path provided between the smoothing part 130 and the AC connector part 150 .

[0106] The AC connector unit 150 has wiring (busbars) for electrically connecting to the motor M. The power conversion device 100 sends AC power to the motor M via the AC connector unit 150. When the motor M functions as a generator when the vehicle V is decelerating, the power conversion device 100 receives AC power from the motor M via the AC connector unit 150.

[0107] When AC power for driving is supplied to the motor M, DC power output from the high voltage battery 200 is input to the noise removal unit 120 via the DC connector unit 110, and high frequency component noise is removed in the noise removal unit 120. The DC power that has passed through the noise removal unit 120 is smoothed in the smoothing unit 130 and sent to the power module unit 140.

[0108] In the power module unit 140 , the three-phase AC power is converted into a three-phase AC power according to a command from the PCM 400 . Then, the converted three-phase AC power is sent to the motor M via the AC connector unit 150 .

[0109] On the contrary, when the motor M functions as a generator when the vehicle V is decelerating, the three-phase AC power generated by the motor M is input to the power module unit 140 via the AC connector unit 150. Then, the input AC power is converted into DC power in the power module unit 140. The converted DC power is sent to the high voltage battery 200 via the smoothing unit 130, the noise removal unit 120, and the DC connector unit 110. Thus, the high voltage battery 200 is charged.

[0110] Furthermore, a DC-DC converter is interposed in a power flow path between the power conversion device 100 and the high voltage battery 200 .

[0111] 4. Internal structure of AC connector unit 150

[0112] use Figures 5 to 7 The internal structure of the AC connector unit 150 will be described. Figure 5 is a perspective view showing the internal structure of the AC connector unit 150. Figure 6 is its expanded stereogram. In addition, Figure 7 It means busbar A schematic cross-sectional view of the configuration of the connecting parts 152a, 153a, 154a and the housing 101.

[0113] like Figure 5 and Figure 6 As shown, the AC connector unit 150 has an AC bus bar 151. The AC bus bar 151 is composed of a combination of a U-phase bus bar (first terminal) 152, a V-phase bus bar (second terminal) 153, and a W-phase bus bar (third terminal) 154. The terminal is formed of a metal plate and has connection parts 152a, 153a, and 154a at its end. Figure 6 As shown, each of the connection portions 152a, 153a, 154a is provided with a through hole 152b, 153b, 154b that allows the bolt BLT to be inserted therethrough.

[0114] The U-phase bus bar 152 , the V-phase bus bar 153 , and the W-phase bus bar 154 are connected to the U-phase wire 602 , the V-phase wire 603 , and the W-phase wire 604 in the connector portion 601 of the terminal block 600 by bolts BLT, respectively.

[0115] The terminal block 600 includes a plate-shaped base portion 621 and a protruding portion 622 protruding from one main surface of the base portion 621. The protruding portion 622 of the terminal block 600 is inserted into the inside through a window portion opened in the case 101 of the power conversion device 100.

[0116] The U-phase wiring 602, the V-phase wiring 603, and the W-phase wiring 604 are wired on one main surface of the protrusion 622 with an insulation distance between them. The insulation distance is "the distance that can ensure the insulation state". If explained in accordance with the IEC standard, the insulation distance includes: the clearance distance and the creeper distance. The clearance distance refers to the shortest distance in space between the two conductors to be insulated that can ensure the insulation state, and the creeper distance refers to the shortest distance along the surface of the insulator set between the two conductors that can ensure the insulation state. In addition, in each wiring A through hole for allowing the bolt BLT to be inserted is opened at the top end portion, and fastening holes (internal thread holes) 602a, 603a, and 604a for screwing the bolt BLT are formed at corresponding portions of the protruding portion 622.

[0117] Furthermore, the terminal block 600 is also connected to a motor-side wiring 611 extending from the motor coil of the motor M. The motor-side wiring 611 is composed of a combination of a U-phase connection wiring 612 electrically connected to the U-phase wiring 602 of the protruding portion 622, a V-phase connection wiring 613 electrically connected to the V-phase wiring 603 of the protruding portion 622, and a W-phase connection wiring 614 electrically connected to the W-phase wiring 604 of the protruding portion 622.

[0118] Then, if Figure 7 As shown, when viewing each busbar from the left side of the vehicle V In the case of the connecting parts 152a, 153a, and 154a in FIG. 1 , the connecting parts 152a, 153a, and 154a are not located on the same plane. Specifically, Figure 5 and Figure 7 As shown, an imaginary surface (first imaginary surface) L152 along the connection surface of the connection part 152a, an imaginary surface (second imaginary surface) L153 along the connection surface of the connection part 153a, and an imaginary surface (third imaginary surface) L154 along the connection surface of the connection part 154a are assumed respectively.

[0119] Here, the connection surfaces of the connection parts 152a, 153a, and 154a are Figure 7 When the side section shown is used as the reference plane, Figure 7 A plane extending in the depth direction orthogonal to the paper surface and toward the cover 155 side.

[0120] like Figure 5 and Figure 7 As shown, the imaginary plane L152 and the imaginary plane L153 intersect at the intersection line IL1, and the imaginary plane L153 and the imaginary plane L154 intersect at the intersection line IL2. The reference plane is a plane orthogonal to the intersection lines IL1 and IL2.

[0121] In addition, as for the reference plane, if it passes through the first and second connection parts and the tool insertion opening and is orthogonal to the connection surface of the first and second connection parts, it is not limited to Figure 7 The cross-section shown as viewed from the side can be set in any direction.

[0122] like Figure 7 As shown, the connection parts 152a, 153a, and 154a are arranged so that the imaginary plane L152 intersects the imaginary plane L153 at an angle θ1, and the imaginary plane L153 intersects the imaginary plane L154 at an angle θ2. Moreover, both the angle θ1 and the angle θ2 are obtuse angles (angles greater than 90° and less than 180°).

[0123] In addition, a normal line (first normal line) Ax152 as a normal line of the connection surface of the connection portion 152a and passing through the center of the through hole (hole for inserting the bolt BLT) 152b, a normal line (second normal line) Ax153 as a normal line of the connection surface of the connection portion 153a and passing through the center of the through hole (hole for inserting the bolt BLT) 153b, and a normal line (third normal line) Ax154 as a normal line of the connection surface of the connection portion 154a and passing through the center of the through hole (hole for inserting the bolt BLT) 154b are drawn. In this case, the normal lines Ax152, Ax153, and Ax154 intersect on the outside of the front side relative to the housing 101 (intersection point P1). The housing 101 of the power conversion device 100 includes: a housing body 101a that accommodates the busbars 152 to 154, etc.; a housing cover 101b that closes the upper opening of the housing body 101a; and a cover 155 that closes the tool insertion opening 101c provided in front of the housing body 101a. The tool insertion opening 101c of the housing body 101a is provided in a part of the outer wall of the housing body 101a, and is used to insert the wiring for connecting the connecting parts 152a, 153a, 154a to the terminal block 600. (Refer to Figure 5 , 6 ) is connected to the opening of the tool for tightening the bolt BLT.

[0124] Normal lines Ax152, Ax153, and Ax154 pass through the tool insertion opening 101c of the housing body 101a at points (positions) P12, P13, and P14. The positions P12, P13, and P14 are located on the opening surface of the tool insertion opening 101c along the outer side surface of the housing body 101a.

[0125] The connection portion 152a and the connection portion 153a are arranged so as to have a gap G1 therebetween, and the connection portion 153a and the connection portion 154a are arranged so as to have a gap G2 therebetween. The gaps G1 and G2 are set to be the minimum distance while ensuring the insulation distance.

[0126] Here, the distance between the intersection of the imaginary plane L152 and the normal line Ax152 and the intersection of the imaginary plane L153 and the normal line Ax153 is L7. In addition, the distance between the intersection of the imaginary plane L153 and the normal line Ax153 and the intersection of the imaginary plane L154 and the normal line Ax154 is L8. The distances L7 and L8 are set so as to ensure the insulation distance between the connection portion 152a and the connection portion 153a, and between the connection portion 153a and the connection portion 154a, and converge to the minimum distance.

[0127] Furthermore, the connection portions 152a, 153a, and 154a are arranged so that in the up-down direction, a distance L11 between the portion P12 and the portion P13 is shorter than the distance L7, and a distance L12 between the portion P13 and the portion P14 is shorter than the distance L8.

[0128] In addition, in this embodiment, the gap dimension between the portion P12 of the tool insertion opening 101c where the normal line Ax152 passes and the upper edge of the tool insertion opening 101c is L5, and the gap dimension between the portion P14 of the tool insertion opening 101c where the normal line Ax154 passes and the lower edge of the tool insertion opening 101c is L6. The distances L5 and L6 are set to allow for the wiring 602 to 604 (see Figure 6 A tool for tightening the bolts BLT connected to the connecting parts 152a, 153a, and 154a (such as the like) can be inserted through the opening 101c for tool insertion, and the size (height size in this embodiment) L1 of the opening 101c for tool insertion can be suppressed to the minimum.

[0129] Furthermore, for the connection portion closest to the tool insertion opening 101c (in the present embodiment, the connection portion 152a and the connection portion 154a), a virtual plane VL1 is assumed which passes through the intersection of the virtual plane L152 and the normal line Ax152 and the intersection of the virtual plane L154 and the normal line Ax154 and is parallel to the tool insertion opening 101c. Furthermore, the shortest distance from the outer side surface in the outer wall of the housing body 101a where the tool insertion opening 101c is provided to the virtual plane VL1 is set to L9. Furthermore, a virtual plane VL2 is assumed which passes through a portion half (1 / 2×L9) of the distance L9 and is parallel to the tool insertion opening 101c. In this case, the intersection point P1 is arranged on the side opposite to the side where the connection portions 152a and 154a are arranged with respect to the virtual plane VL2.

[0130] 5. Effect

[0131] In the power conversion device 100 of the present embodiment, the connection portion 152a of the U-phase busbar 152 and the connection portion 153a of the V-phase busbar 153 are arranged so that the distance L11 between the points (positions) P12 and P13 at which the normal line (first normal line) Ax152 of the U-phase busbar 152 and the normal line (second normal line) of the V-phase busbar 153 respectively pass through the tool insertion opening 101c is shorter than the distance L7 between the intersection of the normal line Ax152 in the U-phase busbar 152 and the connection surface and the intersection of the normal line Ax153 in the V-phase busbar 153 and the connection surface.

[0132] In addition, in the power conversion device 100, the connecting portion 153a of the V-phase busbar 153 and the connecting portion 154a of the W-phase busbar 154 are arranged so that the distance L12 between the points (positions) P13 and P14 at which the normal line (second normal line) Ax153 of the V-phase busbar 153 and the normal line (third normal line) of the W-phase busbar 154 respectively pass through the tool insertion opening 101c is shorter than the distance L8 between the intersection of the normal line Ax153 in the V-phase busbar 153 and the connecting surface and the intersection of the normal line Ax154 in the W-phase busbar 154 and the connecting surface.

[0133] Therefore, in the power conversion device 100, Fig.15 Compared with the case where the opening 101 c for inserting a tool in the housing 101 is radially spread outward in this way, the size (particularly the size in the vertical direction in the present embodiment) of the opening 101 c can be reduced, and the size of the housing 101 itself can be reduced.

[0134] In the power conversion device 100 according to the present embodiment, the connection portion 152a of the U-phase busbar 152 and the connection portion 153a of the V-phase busbar 153 are arranged so that the imaginary planes L152 and L153 along the connection planes intersect each other at an obtuse angle (angle θ1). Therefore, compared with the case where the connection portions of all the busbars are arranged so that the imaginary planes are parallel to each other, the space occupied by the connection portions 152a, 153a, and 154a of the three busbars 152 to 154 can be reduced. Figure 7 The height dimension L4) is reduced by an amount corresponding to the amount by which the connection portion 152a of the U-phase busbar 152 and the connection portion 154a of the W-phase busbar 154 are inclined relative to the connection portion 153a of the V-phase busbar 153. Fig.14 As shown in the comparative example, three busbars When the connection parts 952a, 953a, 954a are arranged to be located on the same imaginary plane L951, when the gaps between the connection parts 952a, 953a, 954a are made equal, the space occupied by the three busbars 952, 953, 954 ( Fig.14 The height dimension L94) is larger than the height dimension L4.

[0135] On the other hand, in the power conversion device 100 according to the present embodiment, the space occupied by the connection portions 152a, 153a, and 154a of the three bus bars 152 to 154 can be made larger. Figure 7 The height dimension L4) is reduced by an amount corresponding to the inclination of the connection portion 152a of the U-phase busbar 152 and the connection portion 154a of the W-phase busbar 154 relative to the connection portion 153a of the V-phase busbar 153, respectively.

[0136] Thus, in the power conversion device 100 according to the present embodiment, it is possible to accommodate three bus bars. The size of the housing 101 is miniaturized.

[0137] In the power conversion device 100, the normal lines Ax152, Ax153, and Ax154 are arranged so as to pass through the tool insertion opening 101c of the housing body 101a and intersect at a point P1 on the outside of the housing 101 (outside the tool insertion opening 101c). Fig.14 As in the comparative example shown in FIG. 1 , the three normal lines Ax952, Ax953, and Ax954 are parallel to each other. Fig.15 Compared with the case where the tool is radially spread outward, the size (height) L1 of the tool insertion opening 101c in the housing body 101a can be miniaturized. Therefore, the size (height) L2 of the cover 155 and the size (height) L3 of the housing 101 can be miniaturized.

[0138] In addition, in the power conversion device 100, the gaps G1 and G2 between the adjacent connecting parts 152a, 153a, and 154a are set to be greater than the insulation distance, so it is not necessary to insert an insulator such as a rib between the connecting parts 152a, 153a, and 154a. Therefore, even if the imaginary planes L152, L153, ​​and L154 intersect at a concave obtuse angle, it is easy to insert a tool into each connecting part 152a, 153a, and 154a, and the increase in manufacturing cost can be suppressed. In addition, if the gaps G1 and G2 between the adjacent connecting parts 152a, 153a, and 154a are set to the minimum distance greater than the insulation distance, it is advantageous in achieving miniaturization of the external dimensions of the power conversion device 100.

[0139] In addition, if Figure 7 As shown in the figure, in the power conversion device 100, the dimension (height dimension) L1 of the tool insertion opening 101c in the housing body 101a is set to be larger than the three bus bars. Since the height dimension L4 of the arrangement of the connection parts 152a, 153a, and 154a in the vertical direction is short, the tool insertion opening 101c for inserting a tool can be provided in a narrow area. Therefore, it is more advantageous in suppressing the size (height dimension) L2 of the cover 155 and the size (height dimension) L3 of the housing 101 in the power conversion device 100 to be small.

[0140] In addition, Fig.14 In the comparative example shown, the connection surfaces (planes facing the cover 955 side) of the connection parts 952a, 953a, 954a are arranged along the same imaginary plane L951, so the arrangement height (height dimension) L94 of the connection parts 952a, 953a, 954a in the vertical direction is longer than the height dimension L4 involved in the arrangement of the present embodiment. In addition, in the comparative example, the connection parts 952a, 953a, 954a are arranged in a manner that the normal lines Ax952, Ax953, Ax954 are parallel to each other, so the size (height dimension) L91 of the tool insertion opening 951c of the shell body 951a has to be longer than the size L1 of the present embodiment, and the size (height dimension) L93 of the shell 951 composed of the cover 955, the shell body 951a and the shell cover 951b also needs to be larger than the shell size of the present embodiment.

[0141] In addition, assuming that Fig.14 The gap size L95 between the normal line Ax952 and the upper edge of the tool insertion opening 951c, the gap size L96 between the normal line Ax954 and the lower edge of the tool insertion opening 951c and Figure 7 When the distance L5 and the distance L6 are the same, Figure 7Compared with the present embodiment shown in the figure, it is also necessary to increase the dimension (height dimension) L91 of the tool insertion opening 951c, the dimension (height dimension) L92 of the cover 955, and the dimension (height dimension) L93 of the housing 951 by an amount corresponding to the normal lines Ax952 and Ax954 not being inclined as in the present embodiment.

[0142] In this embodiment, the power conversion device 100 is mounted in the powertrain room R1 of the vehicle V, and Figure 3 As shown in the figure, the tool insertion opening 101c of the housing body 101a is arranged to face the front of the vehicle V (the direction of the load assumed to be input to the vehicle V). In addition, the housing 101 of the power conversion device 100 is arranged so that the end in the front-rear direction of the vehicle V (the front end 150a of the AC connector part 150) is coplanar with the front end 511a of the first motor housing 511. Therefore, in the power conversion device 100, even if a collision load is input to the vehicle V from the front, the load is not concentratedly input to the power conversion device 100, and a high safety can be ensured.

[0143] In the present embodiment, the front end portion 150a of the housing 101 in the power conversion device 100 is arranged to be aligned with the front end portion 511a (relative to the front end portion 511a of the first motor housing 511). Figure 3 Although the imaginary plane L) is coplanar, higher safety can be ensured by configuring the front end portion 150a of the housing 101 in the power conversion device 100 to be located rearward compared to the front end portion 511a of the first motor housing 511.

[0144] As described above, in the power conversion device 100 according to the present embodiment, three bus bars for electrically connecting to the motor M are also provided in the casing 101 as external devices. Furthermore, the outer dimensions of the housing 101 can be miniaturized.

[0145] [Second embodiment]

[0146] use Figure 8 and Fig. 9 The power conversion device 160 according to the second embodiment of the present invention will be described. The power conversion device 160 according to this embodiment is also an example of an electrical device, and only the busbars (wiring) constituting the AC busbar 251 in the AC connector unit 250 are connected. The configuration of the connecting parts 252a, 253a, and 254a is different from that of the first embodiment, and the other structures are the same as those of the first embodiment. Figure 8 and Fig. 9 Pull out the busbar The connecting parts 252a, 253a, 254a and their surrounding parts are shown in the figure. In addition, the description of the parts overlapping with the first embodiment is omitted below.

[0147] like Figure 8 As shown, the AC connector unit 250 of the power conversion device 160 of this embodiment has an AC busbar 251. The AC busbar 251 is composed of a combination of a U-phase busbar (terminal) 252, a V-phase busbar (terminal) 253, and a W-phase busbar (terminal) 254. Each busbar 252 to 254 is also a terminal formed of a metal material, and has a connecting portion 252a, 253a, 254a at the end. Figure 8 As shown, each busbar 252 to 254 is connected to the wiring 632 to 634 in the connector portion 631 of the terminal block 630 at the connection portion 252a, 253a, 254a using bolts BLT. Fig. 9 As shown, through holes 252b, 253b, 254b for allowing the bolts BLT to be inserted are provided in the respective connection portions 252a, 253a, 254a.

[0148] Furthermore, a motor-side wiring 641 (connection wirings 642 to 644 ) extending from a motor coil of the motor M is also connected to the terminal block 630 .

[0149] like Fig. 9 As shown, when viewing each busbar from the left side of the vehicle V In the case of the connection parts 252a, 253a, and 254a, the connection part 252a and the connection part 253a are not located on the same plane, and the connection part 253a and the connection part 254a are located on the same plane. Figure 8 and 9 As shown, a virtual surface (first virtual surface) L252 along the connection surface of the connection portion 252a and a virtual surface (second virtual surface) L253 along the connection surface of the connection portion 253a and the connection portion 254a are assumed.

[0150] In addition, the connection surfaces of the connection parts 252a, 253a, and 254a are the same as those of the first embodiment. Fig. 9 When the side section shown is used as the reference plane, Fig. 9 A plane extending in a depth direction orthogonal to the paper surface and toward the cover 255 side.

[0151] like Figure 8 and Fig. 9 As shown, the imaginary plane L252 and the imaginary plane L253 intersect at the intersection line IL3. The above-mentioned reference plane is a plane orthogonal to the intersection line IL3.

[0152] In addition, as in the first embodiment, the reference plane is not limited to being formed from the first and second connection parts, as long as it passes through the first and second connection parts and the tool insertion opening and is orthogonal to the connection surface of the first and second connection parts. Fig. 9 The cross-section shown as viewed from the side can be set in any direction.

[0153] like Fig. 9 As shown, the connection portion 252a and the connection portion 253a are arranged so that the virtual plane L252 and the virtual plane L253 intersect at an angle θ21. The angle θ21 is an obtuse angle (an angle exceeding 90° and less than 180°).

[0154] On the other hand, the connection surface of the connection part 254a (the plane facing the tool insertion opening 201c side) is arranged along the virtual plane L253. That is, in this embodiment, the connection surface of the connection part 253a and the connection surface of the connection part 254a are arranged along one virtual plane L253.

[0155] A normal line (first normal line) Ax252 as a normal line of the connection surface of the connection portion 252a and passing through the center of the through hole 252b, a normal line (second normal line) Ax253 as a normal line of the connection surface of the connection portion 253a and passing through the center of the through hole 253b, and a normal line (third normal line) Ax254 as a normal line of the connection surface of the connection portion 254a and passing through the center of the through hole 254b are drawn respectively. In this case, the normal line Ax252 and the normal line Ax253 intersect on the outside of the front side relative to the housing 201 (intersection point P2).

[0156] On the other hand, the connection portion 253a and the connection portion 254a are arranged so that the normal line Ax253 and the normal line Ax254 are substantially parallel.

[0157] The housing 201 of the power conversion device 160 also includes a housing body 201a having an opening at the top and accommodating the busbars. and a housing cover 201b that closes the opening of the housing body 201a. In addition, a tool insertion opening 201c is formed in a portion of the outer wall of the housing body 201a on the front side. The tool insertion opening 201c is used to insert the connection parts 252a, 253a, 254a and the wiring 602 to 604 (see Figure 5 , Figure 6 ) is connected and tightened with the bolt BLT. In addition, the power conversion device 160 further includes a cover 255 for closing the tool insertion opening 201c.

[0158] Normal lines Ax252, Ax253, Ax254 pass through the tool insertion opening 201c of the housing body 201a at points (positions) P22, P23, P24. Points P22, P23, P24 are located on the opening surface of the tool insertion opening 201c along the outer side surface of the housing body 201a.

[0159] The connection portion 252a and the connection portion 253a are configured to open a gap G3 therebetween, and the connection portion 253a and the connection portion 254a are configured to leave a gap G4 therebetween. The gaps G3 and G4 are set to be the minimum distances while ensuring the insulation distance. Here, the distance between the intersection of the imaginary plane L252 and the normal line Ax252 and the intersection of the imaginary plane L253 and the normal line Ax253 is L27. In addition, the distance between the intersection of the imaginary plane L253 and the normal line Ax253 and the intersection of the imaginary plane L253 and the normal line Ax254 is L28. The distances L27 and L28 are set to ensure the insulation distances between the connection portion 252a and the connection portion 253a and between the connection portion 253a and the connection portion 254a, and to be the minimum distances.

[0160] Furthermore, the connection portion 252a and the connection portion 253a are arranged so that a distance L35 between the point P22 and the point P23 in the up-down direction is shorter than a distance L27.

[0161] In addition, in this embodiment, the distance (gap size) between the point (part) P22 of the tool insertion opening 201c and the upper edge of the tool insertion opening 201c is L25, and the distance (gap size) between the point (part) P24 of the tool insertion opening 201c and the lower edge of the tool insertion opening 201c is L26. The distances L25 and L26 are set to allow the wiring 602 to 604 (see FIG. 6 ) for inserting the terminal block 600. Figure 6 ) A tool for tightening the bolts BLT connected to the connecting parts 252a, 253a, and 254a can be inserted, and the size (height dimension) L21 of the opening 201c for tool insertion can be suppressed to a minimum.

[0162] Furthermore, for the connection portion (the connection portion 252a in this embodiment) closest to the tool insertion opening 201c, a virtual plane VL3 is assumed that passes through the intersection of the virtual plane L252 and the normal line Ax252 (the intersection of the reference plane and the intersection line IL3) and is parallel to the tool insertion opening 201c. Furthermore, the shortest distance from the outer side surface of the outer wall of the housing body 201a where the tool insertion opening 201c is provided to the virtual plane VL3 is set to L29. Furthermore, a virtual plane VL4 is assumed that passes through a portion half (1 / 2×L29) of the distance L29 and is parallel to the tool insertion opening 201c. In this case, the intersection point P2 is arranged on the side opposite to the side where the connection portion 252a is arranged with respect to the virtual plane VL4.

[0163] In the power conversion device 160 according to the present embodiment, the connection portion 152a of the U-phase busbar 252 and the connection portion 253a of the V-phase busbar 253 are arranged so that the imaginary planes L252 and L253 along the connecting planes intersect each other at an obtuse angle (angle θ21), thus, compared with the comparative example (refer to FIG. 1 ) in which the connection portions of all the busbars are arranged in parallel with the imaginary planes. Fig.14 ) compared to the space occupied by the connection parts 252a, 253a, and 254a of the three bus bars 252 to 254 ( Fig. 9 The height dimension L24) is reduced by an amount corresponding to the relative inclination of the connection portion 252a of the U-phase busbar 252 with respect to the connection portion 253a of the V-phase busbar 253. Fig.14 As shown in the comparative example, three busbars When the connection parts 952a, 953a, 954a are arranged to be located on the same imaginary plane L951, when the gaps between the connection parts 952a, 953a, 954a are made equal, the space occupied by the three busbars 952, 953, 954 ( Fig.14 The height dimension L94) is larger than dimension L24.

[0164] On the other hand, in the power conversion device 160 according to the present embodiment, the space occupied by the connection portions 252a, 253a, and 254a of the three bus bars 252 to 254 can be made larger. Fig. 9 The height dimension L24) is reduced by an amount corresponding to the relative inclination of the connection portion 252a of the U-phase busbar 252 with respect to the connection portion 253a of the V-phase busbar 253.

[0165] In the power conversion device 160, the normal lines Ax252 and Ax253 are arranged so as to pass through the tool insertion opening 201c of the cover 255 and intersect at a point P2 on the outside of the housing 201 (outside the tool insertion opening 201c). Fig.14As in the comparative example shown in FIG. 1 , the three normal lines Ax952, Ax953, and Ax954 are parallel to each other. Fig.15 Compared with the case where the tool inserting opening 201c in the housing body 201a is radially spread outward, the size (height dimension L21) of the tool inserting opening 201c can be miniaturized. Therefore, the size (height dimension L22) of the cover 255 closing the tool inserting opening 201c can be miniaturized, and the size (height dimension) L23 of the housing 201 composed of the housing body 201a and the housing cover 201b can be miniaturized.

[0166] In addition, in the power conversion device 160, since the gaps G3 and G4 between the adjacent connecting portions 252a, 253a, and 254a are also set to be greater than the insulation distance, the same effect as in the first embodiment can be obtained. In addition, in this embodiment, if the gaps G3 and G4 between the adjacent connecting portions 252a, 253a, and 254a are set to be the minimum distance greater than the insulation distance, it is also advantageous in miniaturizing the outer dimensions of the power conversion device 160.

[0167] [Third Embodiment]

[0168] use Fig.10 and Fig.11 The power conversion device 170 according to the third embodiment of the present invention is described. In addition, the power conversion device 170 according to this embodiment is also an example of an electrical device. Only the configuration of the connection parts 352a and 353a in the busbars (wiring) 352 and 353 is different from that in the first embodiment and the second embodiment, and the other structures are the same as those in the first embodiment and the second embodiment. Fig.11 In the figure, the connection parts 352a and 353a and the surrounding parts of the busbars 352 and 353 are extracted and shown. In addition, the description of the parts overlapping with the first embodiment and the second embodiment is omitted below.

[0169] like Fig.10 As shown, the AC connector part 350 of the power conversion device 170 involved in this embodiment has an AC bus 351. The AC bus 351 is composed of two busbars 352 and 353. That is, the power conversion device 170 involved in this embodiment inputs and outputs AC power to external devices (such as motors) in a single-phase two-wire system. In addition, one of the busbars 352 and 353 is a voltage line, and the other is a neutral line. Each busbar 352 and 353 is also a terminal formed using a metal material, and has a connection part 352a, 353a at the end.

[0170] like Fig.10 and Fig.11As shown, each bus bar 352, 353 is connected to the wiring 652, 653 in the connector part 651 of the terminal block 650 at the connection part 352a, 353a using a bolt BLT. Each connection part 352a, 353a is provided with a through hole 352b, 353b that allows the bolt BLT to be inserted.

[0171] In the power conversion device 170 according to the present embodiment, when the connection portions 352a and 353a of the busbars 352 and 353 are viewed from the left side of the vehicle V, the connection portion 352a and the connection portion 353a are not located on the same plane. Fig.10 and Fig.11 As shown, a virtual surface (first virtual surface) L352 along the connection surface of the connection portion 352a and a virtual surface (second virtual surface) L353 along the connection surface of the connection portion 353a are assumed.

[0172] Here, the connection surfaces of the connection parts 352a and 353a are Fig.11 When the side section shown is used as the reference plane, Fig.11 The plane extends in the depth direction orthogonal to the paper surface and toward the cover 355 side.

[0173] like Fig.10 and Fig.11 As shown, the imaginary plane L352 and the imaginary plane L353 intersect at the intersection line IL4. The above-mentioned reference plane is a plane orthogonal to the intersection line IL4.

[0174] In addition, the reference plane is not limited to the reference plane extending from the first connection portion to the second connection portion, as long as it passes through the first connection portion and the second connection portion and is perpendicular to the connection surface of the first connection portion. Fig.11 The cross-section shown as viewed from the side can be set in any direction.

[0175] The connection parts 352a and 353a are arranged so that the virtual planes L352 and L353 intersect at an angle θ31. The angle θ31 formed by the virtual planes L352 and L353 is an obtuse angle (an angle greater than 90° and less than 180°) similarly to the first and second embodiments.

[0176] In addition, a normal line (first normal line) Ax352 is drawn as a normal line of the connection surface of the connection portion 352a and passes through the center of the through hole 352b, and a normal line (second normal line) Ax353 is drawn as a normal line of the connection surface of the connection portion 353a and passes through the center of the through hole 353b. In this case, the normal line Ax352 and the normal line Ax353 intersect at a point P3 on the inner side of the housing 301 relative to the tool insertion opening 301c provided in the housing body 301a.

[0177] The housing 301 of the power conversion device 170 also includes: a housing body 301a having an opening at the top and accommodating the busbars 352, 353, etc.; and a housing cover 301b, which closes the opening of the housing body 301a. In addition, a tool insertion opening 301c is formed in a part of the outer wall of the housing body 301a on the front side. The tool insertion opening 301c is used to insert the connection parts 352a, 353a and the wiring 652, 653 of the terminal block 650 (see Fig.10 ) is a tool for tightening bolts BLT.

[0178] Normal lines Ax352 and Ax353 pass through the tool insertion opening 301c of the housing body 301a at points (positions) P5 and P6. Points P5 and P6 are arranged on the opening surface of the tool insertion opening 301c along the outer side surface of the housing body 301a.

[0179] Furthermore, the connection portion 352a and the connection portion 353a are arranged so as to open a gap G5 therebetween. The gap G5 is set to be the minimum distance while ensuring the insulation distance.

[0180] For the connection portion closest to the tool insertion opening 301c (in the present embodiment, the connection portion 352a and the connection portion 353a), an imaginary plane VL5 is assumed to pass through the intersection of the imaginary plane L352 and the normal line Ax352 and the intersection of the imaginary plane L353 and the normal line Ax353, and is parallel to the tool insertion opening 301c. Furthermore, the shortest distance from the outer side surface in the outer wall of the housing body 301a where the tool insertion opening 301c is provided to the imaginary plane VL5 is set to L39. Furthermore, an imaginary plane VL6 is assumed to pass through a portion half (1 / 2×L39) of the distance L39 and is parallel to the tool insertion opening 301c. In this case, the intersection point P3 is arranged on the side opposite to the side where the connection portions 352a and 353a are arranged with respect to the imaginary plane VL6.

[0181] In the power conversion device 170 according to the present embodiment, since the connection portion 352a of the busbar 352 and the connection portion 353a of the busbar 353 are arranged so that the imaginary planes L352 and L353 along the connection planes intersect each other at an obtuse angle (angle θ31), compared with the comparative example (refer to FIG. 1 ) in which all the connection portions of the busbars are arranged in parallel with the imaginary planes, Fig.14 . ) can also make the space occupied by the connecting parts 352a and 353a of the busbars 352 and 353 smaller ( Fig.11 The height L34) in the busbar 352 is reduced by an amount corresponding to the relative inclination of the connection portion 352a of the busbar 352 with respect to the connection portion 353a of the busbar 353.

[0182] In the power conversion device 170, the normal lines Ax352 and Ax353 are arranged to intersect at a point (position) P3 on the inner side of the housing body 301a relative to the tool insertion opening 301c, but Fig.14 As in the comparative example shown in FIG. 1 , the three normal lines Ax952, Ax953, and Ax954 are parallel to each other. Fig.15 Compared with the case where the tool is radially spread outward, the dimension (height dimension) L31 of the tool insertion opening 301c in the housing body 301a can be reduced in size. This is based on the following reason.

[0183] like Fig.11 As shown, the part where the normal line Ax352 passes through the tool insertion opening 301c is set as point P4, and the part where the normal line Ax353 passes through the tool insertion opening 301c is set as point P5. In addition, an imaginary line (first imaginary line) L354 passing through the center of the through hole 352b of the connecting portion 352a and extending in the horizontal direction (second direction) and an imaginary line (second imaginary line) L355 passing through the center of the through hole 353b of the connecting portion 353a and extending in the horizontal direction (second direction) are drawn. In this case, point P3 and points (parts) P4 and P5 are set so that both points (parts) P4 and P5 are located in the area between the imaginary line L354 and the imaginary line L355 in the up-down direction (first direction).

[0184] The connection parts 352 and 353 are arranged so that the distance L52 between the parts P4 and P5 in the up and down directions is shorter than the distance L51 between the imaginary line L354 and the imaginary line L355 (the distance between the intersection of the connection surface of the connection part 352a and the normal line Ax352 and the intersection of the connection surface of the connection part 353a and the normal line Ax353).

[0185] By setting the point (position) P3 as described above, unlike the first embodiment and the second embodiment, even if the intersection (intersecting position) P3 of the normal line Ax352 and the normal line Ax353 is located inside the housing body 301a, the size (height dimension) L31 of the tool insertion opening 301c can be limited to a minimum size that allows the tool to be inserted. As a result, the size (height dimension) L32 of the cover 355 that closes the tool insertion opening 301c can be miniaturized, and the size (height dimension in this embodiment) L33 of the housing 301 composed of the housing body 301a and the housing cover 301b can be miniaturized.

[0186] In addition, in the power conversion device 170, the gap G5 between the connecting parts 352a and 353a is also set to be greater than the insulation distance, so the same effect as the first embodiment and the second embodiment can be obtained. In addition, in this embodiment, if the gap G5 between the connecting parts 352a and 353a is set to the minimum distance greater than the insulation distance, it is also advantageous in miniaturizing the outer dimensions of the housing 301 of the power conversion device 170.

[0187] [Summary of the connection arrangement]

[0188] use Fig.12 and Fig.13 The following describes how the connection section is arranged. Fig.12 and Fig.13 In the embodiment, the AC bus bar includes two bus bars 452, 453, 462, and 463 as an example, but the AC bus bar may be configured to include three or more bus bars as in the first embodiment and the second embodiment.

[0189] 1. First Embodiment

[0190] like Fig.12 As shown, in the first embodiment, the AC connector part has two bus bars 452, 453. The bus bars 452, 453 have connection parts 452a, 453a at their ends, respectively. The connection parts 452a, 453a are parts for connecting to the connector part of the terminal block, and have through holes 452b, 453b that allow bolts to be inserted.

[0191] The bus bars 452 and 453 are accommodated in the housing 401. The housing 401 has an opening (tool insertion opening) 401c through which a tool for bolt tightening is inserted when the connection portions 452a and 453a of the bus bars 452 and 453 are connected to the connector portion of the terminal block.

[0192] Here, in this embodiment, Fig.12 That is, it is assumed that the imaginary line along the connection surface of the connection portion 452a (the surface facing the tool insertion opening portion 401c side) and the imaginary surface along the connection surface of the connection portion 453a (the surface facing the tool insertion opening portion 401c side) are perpendicular to the intersection line of the two imaginary lines ( Fig.12 The paper surface is taken as the reference surface.

[0193] In the present embodiment, the one connection portion 453 a is arranged at a position farther from the tool insertion opening 401 c than the other connection portion 452 a .

[0194] A normal line Ax452 is drawn that passes through the radial center of the through hole 452b and is perpendicular to the connection surface of the connection portion 452a, and a normal line Ax453 is drawn that passes through the radial center of the through hole 453b and is perpendicular to the connection surface of the connection portion 453a. In this case, the normal line Ax452 and the normal line Ax453 pass through the points (parts) P45 and P46 and pass through the tool insertion opening 401c, and intersect each other (intersection point P44) outside the housing 401. In addition, in this embodiment, the above-mentioned parts P45 and P46 are also points located in the opening 401c for tool insertion along the opening surface of the outer side surface 401f of the housing 401.

[0195] Furthermore, for the connection portion 453a on the side close to the tool insertion opening 401c, a virtual plane VL41 is assumed that passes through the intersection point P41 of the virtual plane along the connection surface of the connection portion 453a and the normal line Ax453 and is parallel to the tool insertion opening 401c. Furthermore, the shortest distance from the outer side surface 401f in the outer wall of the housing 401 provided with the tool insertion opening 401c to the virtual plane VL41 is assumed to be L44, and a virtual plane VL42 is assumed that passes through a portion half (1 / 2×L44) of the distance L44 and is parallel to the tool insertion opening 401c. In addition, the intersection point of the virtual plane VL41 and the normal line Ax452 is assumed to be point P43, and the intersection point of the virtual plane along the connection surface of the connection portion 452a and the normal line Ax452 is assumed to be point P42.

[0196] In the present embodiment, since the connection portion 452a is arranged at a position farther from the tool insertion opening 401c than the connection portion 453a, the point P42 is arranged at a position farther from the point P43.

[0197] exist Fig.12 On the reference plane shown, the triangle defined by point P44, point P43 and point P41 and the triangle defined by point P44, point P45 and point P46 have a similar figure relationship. In addition, when the distance between point P41 and point P43 in the direction along the tool insertion opening 401c is set to L43 and the distance between point P45 and point P46 is set to L42, in this embodiment, the relationship of L43>L42 is satisfied.

[0198] Therefore, by applying the configuration of this embodiment, the size L41 of the tool insertion opening 401c can be set to be smaller than Fig.14In other words, in this embodiment, the distance L45 between the point P44 and the imaginary plane VL41 is longer than the distance (1 / 2×L44) between the imaginary plane VL41 and the imaginary plane VL42, that is, with respect to the imaginary plane VL42 passing through the opening surface of the tool insertion opening 401c and the position of half (1 / 2×L44) of the distance L44 between the imaginary plane VL41, the connection parts 452a and 453a are arranged in a manner such that the relationship between the intersection of the two normal lines Ax452 and Ax453 is established on the side opposite to the side where the connection parts 452a and 453a are arranged, so that the size L41 of the tool insertion opening 401c can be suppressed to be smaller than Fig.14 The case of the comparative example shown is small.

[0199] 2. Second Embodiment

[0200] like Fig.13 As shown, in the second embodiment, the AC connector part has two bus bars 462, 463. The bus bars 462, 463 have connection parts 462a, 463a at their ends, respectively. The connection parts 462a, 463a are parts for connecting to the connector part of the terminal block, and have through holes 462b, 463b that allow bolts to be inserted.

[0201] The bus bars 462 and 463 are accommodated in the housing 402. The housing 402 has an opening (tool insertion opening) 402c through which a tool for bolt tightening is inserted when connecting the connector of the terminal block to the respective connection parts 462a and 463a of the bus bars 462 and 463.

[0202] Here, in this embodiment, Fig.13 That is, it is assumed that the imaginary line along the connection surface of the connection portion 462a (the surface facing the tool insertion opening portion 402c side) and the imaginary surface along the connection surface of the connection portion 463a (the surface facing the tool insertion opening portion 402c side) are perpendicular to the intersection line of the two imaginary lines ( Fig.13 The paper surface is taken as the reference surface.

[0203] In the present embodiment, the one connection portion 463 a is arranged at a position farther from the tool insertion opening 402 c than the other connection portion 462 a .

[0204] A normal line Ax462 is drawn that passes through the radial center of the through hole 462b and is orthogonal to the connection surface of the connection portion 462a, and a normal line Ax463 is drawn that passes through the radial center of the through hole 463b and is orthogonal to the connection surface of the connection portion 463a. In this case, the normal line Ax462 and the normal line Ax463 pass through the parts P55 and P56 and pass through the tool insertion opening 401c. In addition, the normal line Ax462 and the normal line Ax463 intersect each other on the inner side of the housing 402 (intersection point P54). In addition, in this embodiment, the above-mentioned parts P55 and P56 are also points located in the opening surface of the tool insertion opening 402c along the outer side surface 402f of the housing 402.

[0205] Moreover, for the connection portion 463a on the side close to the tool insertion opening 402c, a virtual surface VL43 is assumed to pass through the intersection point P51 of the virtual surface along the connection surface of the connection portion 463a and the normal line Ax463 and to be parallel to the tool insertion opening 402c. Furthermore, the shortest distance from the outer side surface 402f in the outer wall of the housing 402 provided with the tool insertion opening 402c to the virtual surface VL43 is assumed to be L49, and a virtual surface VL44 is assumed to pass through a portion half (1 / 2×L49) of the distance L49 and to be parallel to the tool insertion opening 402c. In addition, the intersection point of the virtual surface VL43 and the normal line Ax462 is assumed to be point P53, and the intersection point of the virtual surface along the connection surface of the connection portion 462a and the normal line Ax462 is assumed to be point P52.

[0206] In the present embodiment, since the connection portion 462a is arranged at a position farther from the tool insertion opening 402c than the connection portion 463a, the point P52 is arranged at a position farther from the point P53.

[0207] exist Fig.13 On the reference plane shown, the triangle defined by point P54, point P53 and point P51 and the triangle defined by point P54, point P56 and point P55 have a similar figure relationship. In addition, when the distance between point P51 and point P53 in the direction along the tool insertion opening 402c is set to L48, and the distance between point P55 and point P56 is set to L47, in this embodiment, the relationship of L48>L47 is satisfied.

[0208] Therefore, by applying the configuration of this embodiment, the size L46 of the tool insertion opening 402c can be set to be smaller than Fig.14In other words, in this embodiment, the distance L50 between the point P54 and the imaginary plane VL43 is longer than the distance (1 / 2×L49) between the imaginary plane VL43 and the imaginary plane VL44, that is, with respect to the imaginary plane VL44 passing through the position of half (1 / 2×L49) of the distance L49 between the opening surface of the tool insertion opening 402c and the imaginary plane VL43, the connection parts 462a and 463a are arranged in a manner such that the relationship of the intersection of the two normal lines Ax462 and Ax463 is established on the side opposite to the side where the connection parts 462a and 463a are arranged, so that the size L46 of the tool insertion opening 402c can be suppressed to be smaller than Fig.14 The case of the comparative example shown is small.

[0209] [Other Modifications]

[0210] In the first to third embodiments, the power conversion devices 100, 160, and 170 are used as an example of electrical equipment, but the present invention is not limited thereto. For example, the terminal structure of the present invention can also be applied to a distribution board, a DC-DC converter, an AC transformer, a motor, etc.

[0211] Furthermore, when a power conversion device is used as an electric device, the terminal structure of the present invention can be applied not only to a power conversion device mounted on a vehicle but also to a power conversion device used in industrial equipment and the like.

[0212] In the first to third embodiments and the first and second embodiments, busbars 152 to 154, 252 to 254, 352, 353, 452, 453, 462, 463 are used as an example of wiring, but the type of wiring of the present invention is not limited to this. For example, it can also be a wire harness. In this case, the terminal structure involved in the present invention can be applied by connecting a terminal having a planar connection surface as a connecting portion to the wire harness.

[0213] In the above-mentioned first to third embodiments, no insulator is sandwiched between the connecting parts 152a, 153a, 154a, 252a, 253a, 254a, 352a, 353a, and the gaps G1 to G5 are greater than the insulation distance (the spatial distance that can ensure the insulation state), but the present invention is not limited to this. For example, an insulator such as a rib may be sandwiched between adjacent connecting parts so that the distance of the gap connecting the connecting parts in a straight line is smaller than the insulation distance (the insulation distance referred to here is the insulation distance when the above-mentioned insulator is not sandwiched. It does not include the spatial distance when the insulator is sandwiched (the insulation distance of the path bypassing the insulator in the space between the two terminals) and the surface distance (the insulation distance of the path along the surface of the insulator between the two terminals)).

[0214] In the first to third embodiments, the tool insertion openings 101c, 201c, 301c are provided in the housing bodies 101a, 201a, 301a of the housings 101, 201, 301. However, the present invention may also provide the housing cover with a tool insertion opening.

[0215] The tool insertion opening may be not only a window-shaped hole but also an opening formed so as to be recessed from an edge of the housing body, the housing cover, or the like.

[0216] In the above-mentioned first embodiment to the third embodiment, a structure in which two or three connecting parts 152a, 153a, 154a, 252a, 253a, 254a, 352a, 353a are provided on the inner side of the shell 101, 201, 301, but in the present invention, a structure in which more than four connecting parts are accommodated in the shell can also be adopted.

[0217] In the first embodiment and the second embodiment, a structure is adopted in which three connecting parts 152a, 153a, 154a, 252a, 253a, and 254a are arranged in a manner arranged in the up-down direction of the vehicle V, but the present invention is not limited to this. For example, a plurality of connecting parts may also be dispersedly arranged in the left-right direction. In addition, the connecting parts of a plurality of terminals may also be dispersedly arranged in two directions, the up-down direction and the left-right direction, two directions, the front-back direction and the left-right direction, and three directions, the up-down direction and the front-back direction and the left-right direction. In this case, a plurality of connecting parts are two-dimensionally arranged or three-dimensionally arranged in the frame.

Claims

1. A terminal structure of an electrical device, characterized in that: have: A plurality of terminals, the plurality of terminals including at least a first terminal and a second terminal adjacent to each other, the plurality of terminals being electrically connected to an external device respectively, and each of the plurality of terminals having a connection portion, the connection portion being arranged to extend from a predetermined reference plane to a direction orthogonal to the reference plane; as well as a frame body, the frame body accommodating the plurality of terminals, and having a tool insertion opening in a part of the outer wall area, the tool insertion opening being capable of being inserted with a tool for electrically connecting to the plurality of terminals, The connection portion of each of the plurality of terminals has a connection surface and a through hole, wherein the connection surface is a plane and the through hole is for a bolt for the electrical connection to pass through. Draw a first normal line passing through the radial center of the through hole in the connecting portion of the first terminal and extending along the normal direction of the connecting surface in the connecting portion of the first terminal, and a second normal line passing through the radial center of the through hole in the connecting portion of the second terminal and extending along the normal direction of the connecting surface in the connecting portion of the second terminal. In this case, When viewed from a direction orthogonal to the reference plane, the connecting portion of the first terminal and the connecting portion of the second terminal are configured such that a distance between a portion where the first normal passes through the tool insertion opening and a distance between a portion where the second normal passes through the tool insertion opening is shorter than a distance between a portion where the connecting surface in the connecting portion of the first terminal and the first normal intersects and a portion where the connecting surface in the connecting portion of the second terminal and the second normal intersects.

2. The terminal structure of the electrical device according to claim 1, characterized in that: Assuming a first imaginary plane along the connection surface of the connection portion of the first terminal and a second imaginary plane along the connection surface of the connection portion of the second terminal, The shortest distance from the intersection of the first imaginary surface and the first normal line to a portion of the outer wall is set as a first distance, and the shortest distance from the intersection of the second imaginary surface and the second normal line to a portion of the outer wall is set as a second distance. In this case, The first imaginary plane intersects with the second imaginary plane, and the reference plane is defined in a direction orthogonal to an intersection line of the first imaginary plane and the second imaginary plane. The connecting portion of the first terminal and the connecting portion of the second terminal are arranged so that the first imaginary plane intersects the second imaginary plane at an obtuse angle, and, when viewed from a direction orthogonal to the reference plane, the first normal line and the second normal line pass through the tool insertion opening, and the first normal line and the second normal line intersect on the side opposite to the side on which the connecting portions of the first terminal and the second terminal are arranged, relative to a position that is half of the shorter distance between the first distance and the second distance.

3. The terminal structure of the electrical device according to claim 2, characterized in that: The connection portion of the first terminal and the connection portion of the second terminal are arranged so that the first normal line and the second normal line intersect outside the frame body when viewed from a direction perpendicular to the reference plane.

4. The terminal structure of the electrical device according to claim 2, characterized in that: The plurality of terminals are arranged such that a gap between adjacent connection portions is equal to or larger than an insulation distance.

5. The terminal structure of the electrical device according to claim 2, characterized in that: The tool insertion opening is formed such that an opening length thereof is shorter than an arrangement length of the connection portions of the plurality of terminals in a direction perpendicular to a direction defining the first distance and the second distance within the reference plane.

6. The terminal structure of the electrical device according to any one of claims 2 to 5, characterized in that: The electrical device is a power conversion device that converts direct current into alternating current. The external device is a three-phase AC motor that rotates when supplied with three-phase AC power. The plurality of terminals are arranged in a power supply path for supplying power to the three-phase AC motor, and are composed of the first terminal, the second terminal, and a third terminal, wherein the connection portion of the third terminal is arranged adjacent to the connection portion of the second terminal. Draw a third imaginary plane along the connection surface of the connection portion of the third terminal and a third normal line passing through the radial center of the through hole in the connection portion of the third terminal and extending along the normal direction of the connection surface in the connection portion of the third terminal, The shortest distance from the point where the third imaginary surface intersects the third normal line to a portion of the outer wall is defined as a third distance. In this case, The connecting portion of the third terminal is configured so that the second imaginary plane intersects the third imaginary plane at an obtuse angle, and, when viewed from a direction orthogonal to the reference plane, the second normal and the third normal pass through the tool insertion opening, and the second normal and the third normal intersect each other on the side opposite to the side on which the connecting portions of the second terminal and the third terminal are arranged, relative to a position that is half of the shorter distance between the second distance and the third distance.

7. The terminal structure of the electric device according to claim 6, characterized in that: The connection portion of the second terminal and the connection portion of the third terminal are arranged so that the second normal line and the third normal line intersect outside the frame body when viewed from a direction perpendicular to the reference plane.

8. The terminal structure of the electric device according to claim 1, characterized in that: When viewed from a direction perpendicular to the reference plane, a direction connecting a portion through which the first normal line passes and a portion through which the second normal line passes in the tool insertion opening is set as a first direction, and a direction perpendicular to the first direction on the reference plane is set as a second direction. In this case, When a first imaginary line passing through the radial center of the through hole in the connecting portion of the first terminal and extending along the second direction and a second imaginary line passing through the radial center of the through hole in the connecting portion of the second terminal and extending along the second direction are drawn, a portion where the first normal line passes through the opening for tool insertion and a portion where the second normal line passes through the opening for tool insertion are located in an area between the first imaginary line and the second imaginary line in the first direction.

9. The terminal structure of the electric device according to claim 6, characterized in that: The three-phase AC motor is a driving motor of the vehicle mounted in a powertrain compartment of the vehicle and has a motor case as a housing. A transmission is mounted in the powertrain chamber, the transmission is arranged adjacent to the electric motor and has a bridge housing as a housing. The frame is configured so that, on the housing of at least one of the motor housing and the bridge housing, the opening for inserting the tool faces the input direction side of the collision load assumed in the vehicle, and the end of the frame on the input direction side is coplanar with the motor housing or the bridge housing, or is located on the side opposite to the input direction compared to the motor housing or the bridge housing.

Images