Power Conversion Device

Abstract

To simplify and compact the structure of a power conversion device in which the spacing between connector terminals and the spacing between connection terminals are different.SOLUTION: A power conversion device includes a connector having a plurality of connector terminals, a power module arranged at a distance in a first direction relative to the connector and having a plurality of connection terminals corresponding to the plurality of connector terminals, a plurality of bus bars connecting each connector terminal and each connection terminal, and a current sensor having a magnetic core that detects current flowing through each bus bar. The plurality of connector terminals and the plurality of connection terminals are arranged side by side in a second direction that intersects the first direction and are arranged such that a first spacing, which is the spacing between adjacent connector terminals, is different from a second spacing, which is the spacing between adjacent connection terminals. The plurality of bus bars are arranged side by side in the second direction and extend linearly from the connector terminals to the connection terminals.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a power conversion device. [Background technology]

[0002] A power conversion device disclosed in Patent Document 1 is known.

[0003] The power conversion device disclosed in Patent Document 1 is installed between a motor and a battery, converts power supplied from the battery into three-phase AC power, and supplies it to the motor. This power conversion device includes a power module having bus bars through which current supplied to the motor flows, a current sensor having a magnetic core that detects the current flowing through the bus bars, and a connector connected to the motor. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-19485 Summary of the Invention [Problem to be solved by the invention]

[0005] For example, there is a power conversion device configured as shown in Fig. 10. This power conversion device 30 has, between a connector 40 and a power module 50, a plurality of bus bars 60 that connect a plurality of connector terminals 80 provided on the connector 40 to a plurality of connection terminals 90 provided on the power module 50, and a current sensor 70 having through holes 170 through which each bus bar 60 passes.

[0006] The multiple connector terminals 80 and the multiple connection terminals 90 are arranged side by side in a second direction X2 that is perpendicular to the first direction X1, which is the direction of separation between the connector 40 and the power module 50. Each through hole 170 passes through the current sensor 70 parallel to the first direction X1. The through holes 17 are also arranged side by side in the second direction X2.

[0007] In the power conversion device 30, if the spacing 100 between the connector terminals 80 is different from the spacing 110 between the connection terminals 90, as shown in FIG. 10, the wiring will be a bus bar 60 with a complex shape that requires many bends, and the bus bar 60 will not be able to pass through the through hole 170 of the current sensor 70.

[0008] Therefore, the bus bar 60 must be divided into a first bar 60A and a second bar 60B. Furthermore, dividing the bus bar 60 requires an intermediate terminal block 31 to support the divided portion, which complicates the structure of the power conversion device 30. Furthermore, providing the intermediate terminal block 31 increases the number of parts and takes up space.

[0009] In view of the above problems, the present invention aims to simplify and compact the structure of a power converter in which the spacing between connector terminals is different from the spacing between connection terminals. [Means for solving the problem]

[0010] A power conversion device according to one aspect of the present invention includes a connector having a plurality of connector terminals, a power module arranged spaced apart in a first direction relative to the connector and having a plurality of connection terminals corresponding to the plurality of connector terminals, a plurality of bus bars connecting each connector terminal to each connection terminal, and a current sensor having a magnetic core that detects current flowing through each bus bar, wherein the plurality of connector terminals and the plurality of connection terminals are arranged side by side in a second direction that intersects the first direction, and are arranged such that a first interval that is a distance between adjacent connector terminals is different from a second interval that is a distance between adjacent connection terminals, and the plurality of bus bars are The outer shape is formed into a rectangular shape in plan view by the plate material,The terminals are arranged side by side in the second direction and extend linearly between the connector terminal and the connection terminal.

[0011] Further, the adjacent bus bars are arranged such that a third interval, which is an interval between the bus bars, gradually narrows from the larger interval of the first interval and the second interval to the smaller interval, and the current sensor has a sensor body that houses the magnetic core and has a plurality of through holes through which the plurality of bus bars pass, and the sensor body is arranged such that a portion through which one of the adjacent bus bars is inserted is inclined toward the smaller interval of the first interval and the second interval with respect to a portion through which the other bus bar is inserted. The wires are bent between the corresponding bus bars.

[0012] The current sensor also has a mounting portion on which the bus bar is mounted, the mounting portion being disposed on the narrow side of the third interval, and the sensor main body being disposed on the wide side of the third interval.

[0013] Further, the plurality of connector terminals include a first connector terminal, a second connector terminal, and a third connector terminal arranged in order from one side to the other side in the second direction, the plurality of connection terminals include a first connection terminal, a second connection terminal, and a third connection terminal arranged in order from one side to the other side in the second direction, the plurality of bus bars include a first bus bar connecting the first connector terminal and the first connection terminal, a second bus bar connecting the second connector terminal and the second connection terminal, and a third bus bar connecting the third connector terminal and the third connection terminal, the sensor body has a first portion having the through hole through which the first bus bar passes, a second portion having the through hole through which the second bus bar passes, and a third portion having the through hole through which the third bus bar passes, and is bent between the bus bars so that the second portion is inclined toward the smaller of the first spacing and the second spacing with respect to the first portion, and the third portion is inclined toward the smaller of the first spacing and the second spacing with respect to the second portion.

[0014] The first gap is formed to be narrower than the second gap. [Effects of the Invention]

[0015] According to the above-described power conversion device, the through holes of the current sensor through which each busbar passes are formed in a penetrating shape along the extension direction of the corresponding busbar, for a plurality of busbars that extend linearly to connect a plurality of connector terminals and a plurality of connection terminals having different spacing between the connector terminals and the terminals. This makes it possible to simplify and compact the structure of a power conversion device in which the spacing between the connector terminals and the spacing between the connection terminals are different. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram of a power conversion device. [Figure 2] FIG. 1 is a plan view of an assembly diagram of a connector, a power module, a bus bar, and a current sensor. [Figure 3] FIG. 1 is a perspective view of an assembly diagram of a connector, a power module, a bus bar, and a current sensor. [Figure 4] FIG. 1 is a side view of an assembly diagram of a connector, a power module, a bus bar, and a current sensor. [Figure 5] FIG. 2 is a plan view of the current sensor. [Figure 6] FIG. 2 is a perspective view of the current sensor as seen from the power module side. [Figure 7] FIG. 2 is a perspective view of the current sensor as seen from the connector side. [Figure 8] FIG. 3 is a cross-sectional view taken along the line Z1-Z1 in FIG. 2. [Figure 9] FIG. 2 is a cross-sectional view of a bus bar penetrating portion of the current sensor. [Figure 10] 1A and 1B are diagrams for explaining the problem, in which (A) is a plan view of a power conversion device, and (B) is a side view of the power conversion device. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.

[0018] 1 shows a power conversion device 1 (vehicle-mounted power conversion device) mounted on, for example, agricultural machinery, construction machinery, etc. The power conversion device 1 is disposed between a battery 24 and a motor (three-phase AC motor) 2, and is a device (a so-called inverter) that converts DC power from the battery 24 into AC power suitable for driving the motor 2 and supplies it to the motor 2. The power conversion device 1 also controls the motor 2. Furthermore, the power conversion device 1 converts AC power generated by the motor 2 into DC power that can charge the battery 24, and sends it to the battery 24.

[0019] 1, the power conversion device 1 has a case 3, a connector (three-pole output connector) 4, a power module 5, a plurality of bus bars 6, and a current sensor 7. The case 3 can accommodate and mount a unit made up of the connector 4, the power module 5, the bus bars 6, and the current sensor 7.

[0020] As shown in FIGS. 1, 2, 3, and 4, the connector 4 and the power module 5 are arranged spaced apart in the first direction X1. The first direction X1 is, for example, a horizontal direction. In this embodiment, the connector 4 is arranged offset from the center of the power module 5 in the second direction X2 to one side 12 in the second direction X2. The second direction X2 is a direction intersecting the first direction X1. In this embodiment, the second direction X2 is, for example, a horizontal direction perpendicular to the first direction X1.

[0021] The connector 4 has a plurality of connector terminals 8 (first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C) connected to the motor 2. The first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C are arranged side by side at intervals (first intervals) 10 in the second direction X2. The first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C are arranged in order from one side 12 to the other side 13 in the second direction X2. In this embodiment, the first interval 10A between the first connector terminals 8A and the second connector terminals 8B and the first interval 10B between the second connector terminals 8B and the third connector terminals 8C are formed to be the same interval. In other words, the first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C are arranged at equal intervals (equal pitch) in the second direction X2.

[0022] The power module 5 is primarily a device that converts the power supplied to the motor 2 (an inverter main body that converts DC power to AC power) and controls the rotation speed of the motor 2 by controlling the frequency of the power supplied to the motor 2. The power module 5 has a plurality of connection terminals 9 (first connection terminal 9A, second connection terminal 9B, third connection terminal 9C) corresponding to a plurality of connector terminals 8 (first connector terminal 8A, second connector terminal 8B, third connector terminal 8C) provided on the connector 4. The first connection terminal 9A, second connection terminal 9B, and third connection terminal 9C are provided on an end of the power module 5 on the connector 4 side in the first direction X1. The first connection terminal 9A, second connection terminal 9B, and third connection terminal 9C are arranged side by side in the second direction X2 with an interval (second interval) 11 between them. The first connection terminal 9A, second connection terminal 9B, and third connection terminal 9C are arranged in order from one side 12 to the other side 13 in the second direction X2. In this embodiment, the second distance 11A between the first connection terminal 9A and the second connection terminal 9B is different from the second distance 11B between the second connection terminal 9B and the third connection terminal 9C. Specifically, the second distance 11A between the first connection terminal 9A and the second connection terminal 9B is larger than the second distance 11B between the second connection terminal 9B and the third connection terminal 9C. In other words, the first connection terminal 9A, the second connection terminal 9B, and the third connection terminal 9C are arranged at unequal intervals (unequal pitch) in the second direction X2. Note that the first connection terminal 9A, the second connection terminal 9B, and the third connection terminal 9C may also be arranged at equal intervals (equal pitch).

[0023] 2, first intervals 10, which are the mutual intervals between the multiple connector terminals 8 (first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C), and second intervals 11, which are the mutual intervals between the multiple connection terminals 9 (first connection terminals 9A, second connection terminals 9B, and third connection terminals 9C), are different from each other. In this embodiment, first intervals 10 are formed to be narrower than second intervals 11.

[0024] As shown in FIG. 4, the upper ends of the connector terminals 8 are disposed at the same height as the upper ends (upper surfaces) of the connection terminals 9. As shown in FIG.

[0025] As shown in FIGS. 1, 2, 3, and 4, the multiple bus bars 6 are members that connect the connector terminals 8 and the connection terminals 9, and are provided in a number corresponding to the multiple connector terminals 8 (first connector terminals 8A, second connector terminals 8B, and third connector terminals 8C) and the multiple connection terminals 9 (first connection terminals 9A, second connection terminals 9B, and third connection terminals 9C). In this embodiment, the multiple bus bars 6 include a first bus bar 6A, a second bus bar 6B, and a third bus bar 6C. The first bus bar 6A, the second bus bar 6B, and the third bus bar 6C are arranged side by side at intervals in the second direction X2. The first bus bar 6A, the second bus bar 6B, and the third bus bar 6C are arranged in this order from one side 12 to the other side 13 in the second direction X2. Each bus bar 6 is formed of a linear plate material (strip plate material) conductor and extends linearly between the connector terminals 8 and the connection terminals 9. One end of the bus bar 6 is placed on the upper end of a connector terminal 8 and connected to the connector terminal 8 , and the other end of the bus bar 6 is placed on the upper end of a connection terminal 9 and connected to the connection terminal 9 .

[0026] 2 , since the first interval 10 between the connector terminals 8 and the second interval 11 between the connection terminals 9 are different, the bus bars 6 are arranged so that the angle of the extension direction (longitudinal direction) 14 with respect to the first direction X1 is different. In other words, adjacent bus bars 6 are arranged so that the third interval 15, which is the interval between the bus bars 6, gradually narrows from the larger interval of the first interval 10 or the second interval 11 to the smaller interval. In this embodiment, since the first interval 10 is smaller than the second interval 11, adjacent bus bars 6 are arranged so that the third interval 15 gradually narrows from the connection terminal 9 to the connector terminal 8.

[0027] The current sensor 7 is a device that detects the magnitude of the current flowing through the bus bar 6. Based on the value detected by the current sensor 7, for example, the rotation of the motor 2 is appropriately controlled.

[0028] As shown in FIGS. 2, 3, and 5, the current sensor 7 includes a sensor body 16. The sensor body 16 is disposed between the first connector terminal 8A, the second connector terminal 8B, and the third connector terminal 8C and the first connection terminal 9A, the second connection terminal 9B, and the third connection terminal 9C. The sensor body 16 includes a through hole 17 through which the bus bar 6 passes and a magnetic core 18 that detects the current flowing through the bus bar 6. The through hole 17 is formed by passing through the sensor body 16 in the width direction. The magnetic core 18 detects the magnitude (current value) of the current flowing through the bus bar 6. More specifically, the magnitude of the current flowing through the bus bar 6 is calculated based on the detection value detected by the magnetic core 18. As shown in FIG. 8, the magnetic core 18 is formed, for example, in a cylindrical shape that covers the periphery of the through hole 17 and is embedded and housed within the sensor body 16. In other words, the sensor body 16 includes the through hole 17 through which the bus bar 6 passes and that is surrounded by the magnetic core 18.

[0029] As shown in FIGS. 5, 6, and 8, the sensor main body 16 has a first portion 16A, a second portion 16B, and a third portion 16C. The first portion 16A has a through hole 17 (first through hole 17A) through which the first bus bar 6A passes and a magnetic core 18 (first magnetic core 18A) surrounding the first through hole 17A. The second portion 16B has a through hole 17 (second through hole 17B) through which the second bus bar 6B passes and a magnetic core 18 (second magnetic core 18B) surrounding the second through hole 17B. The third portion 16C has a through hole 17 (third through hole 17C) through which the third bus bar 6C passes and a magnetic core 18 (third magnetic core 18C) surrounding the third through hole 17C.

[0030] As shown in FIG. 2 , each through hole 17 is formed so that its axial direction is parallel to the corresponding bus bar 6. In other words, each through hole 17 is formed to penetrate along the extension direction 14 of the corresponding bus bar 6. That is, the first through hole 17A is formed to penetrate along the extension direction 14A of the first bus bar 6A, the second through hole 17B is formed to penetrate along the extension direction 14B of the second bus bar 6B, and the third through hole 17C is formed to penetrate along the extension direction 14C of the third bus bar 6C. Furthermore, the first magnetic core 18A is arranged so that its axial direction is along the extension direction 14A of the first bus bar 6A, the second magnetic core 18B is arranged so that its axial direction is along the extension direction 14B of the second bus bar 6B, and the third magnetic core 18C is arranged so that its axial direction is along the extension direction 14C of the third bus bar 6C.

[0031] In this embodiment, connector terminals 8 and connection terminals 9, the spacing between which is different from the spacing between the connector terminals 8, are connected by linearly extending bus bars 6, and through holes 17 in current sensors 7, through which the bus bars 6 pass, are formed in a penetrating shape along the extension direction 14 of the corresponding bus bars 6. This simplifies the shape of the bus bars 6 and reduces costs in a power conversion device 1 in which the spacing between connector terminals 8 and the spacing between connection terminals 9 differ. Furthermore, there is no need to divide the bus bars 6, and therefore no intermediate terminal block is required. Furthermore, the reduced number of parts reduces assembly steps and allows the power conversion device 1 to be made more compact.

[0032] 2 and 5, sensor body 16 is bent between adjacent bus bars 6 such that a portion through which one of the adjacent bus bars 6 is inserted is inclined toward the smaller of first interval 10 and second interval 11 relative to a portion through which the other bus bar 6 is inserted. More specifically, width 19 of sensor body 16 is formed to be the same across first portion 16A, second portion 16B, and third portion 16C, and sensor body 16 is bent between bus bars 6 such that second portion 16B is inclined toward first interval 10 (the smaller of first interval 10 and second interval 11) relative to first portion 16A, and third portion 16C is inclined toward first interval 10 (the smaller of first interval 10 and second interval 11) relative to second portion 16B. More specifically, sensor body 16 is bent between first bus bar 6A and second bus bar 6B so that second portion 16B is inclined toward first interval 10 relative to first portion 16A, and is also bent between second bus bar 6B and third bus bar 6C so that third portion 16C is inclined toward first interval 10 relative to second portion 16B. Therefore, sensor body 16 has an arch shape in a plan view.

[0033] By forming the sensor body 16 in an arch shape, the sensor body 16 can be made compact. That is, since the axial directions of the through holes 17 are different and a magnetic core 18 is provided for each through hole 17 with a different axial direction, forming the sensor body 16 in a straight line would result in a thick width 19 of the sensor body. By forming the sensor body 16 in an arch shape, the width 19 of the sensor body can be formed to correspond to the axial length of the magnetic core 18, allowing the sensor body 16 to be made compact. This in turn allows the current sensor 7 to be made compact.

[0034] As shown in FIGS. 5, 6, 7, and 9, the current sensor 7 has a mounting portion 20 on which the bus bar 6 is mounted. The mounting portion 20 has a first mounting portion 20A on which the first bus bar 6A is mounted, a second mounting portion 20B on which the second bus bar 6B is mounted, and a third mounting portion 20C on which the third bus bar 6C is mounted. As shown in FIG. 9, the mounting portion 20 protrudes from a vertical midpoint of the sensor main body 16 toward the connector terminal 8. Specifically, the first mounting portion 20A protrudes from the first portion 16A in the extension direction 14A toward the first connector terminal 8A, the second mounting portion 20B protrudes from the second portion 16B in the extension direction 14B toward the second connector terminal 8B, and the third mounting portion 20C protrudes from the third portion 16C in the extension direction 14C toward the third connector terminal 8C.

[0035] 8 and 9, the upper surface of each mounting portion 20 serves as a mounting surface 21 on which the corresponding bus bar 6 is placed and supported. When the bus bar 6 is placed on the mounting portion 20, a gap is formed between the bus bar 6 and the inner surface of the through hole 17. In other words, the bus bar 6 is not in contact with the inner surface of the through hole 17, and the mounting portion 20 supports the bus bar 6 such that a gap is formed between the bus bar 6 and the through hole 17.

[0036] The mounting portion 20 is disposed on the narrow side of the third interval 15, and the sensor main body 16 is disposed on the wide side of the third interval 15. For example, if the mounting portion 20 is disposed on the wide side of the third interval 15 and the sensor main body 16 is disposed on the narrow side of the third interval 15, it may be difficult to secure a space to accommodate the magnetic core 18. In this embodiment, the second magnetic core 18B and the third magnetic core 18C are close to each other, making it difficult to secure a space to accommodate these magnetic cores 18. In this embodiment, by disposing the mounting portion 20 on the narrow side of the third interval 15 and disposing the sensor main body 16 on the wide side of the third interval 15, it is possible to secure a space to accommodate the magnetic core 18.

[0037] The current sensor 7 has restricting portions 22 that restrict the position of the busbars 6. The restricting portions 22 are located on both sides of each busbar 6 and protrude from the sensor body 16 toward the connector terminals 8. Specifically, the restricting portions 22 have a first restricting portion 22A located on one side 12 in the second direction X2 of the first busbar 6A, a second restricting portion 22B located between the first busbar 6A and the second busbar 6B, a third restricting portion 22C located between the second busbar 6B and the third busbar 6C, and a fourth restricting portion 22D located on the other side 13 in the second direction X2 of the third busbar 6C. The distance between the first restricting portion 22A and the second restricting portion 22B, the distance between the second restricting portion 22B and the third restricting portion 22C, and the distance between the third restricting portion 22C and the fourth restricting portion 22D are approximately the same as the width of the busbar 6 (corresponding busbar 6) and are formed to have a dimension that allows the busbar 6 to fit.

[0038] The current sensor 7 has an installation portion 23 that is attached with a bolt or the like to a mounting portion provided on the case 3. The installation portion 23 has a first installation portion 23A located on one side 12 of the sensor main body 16 in the second direction X2, and a second installation portion 23B2 located on the other side 13 of the sensor main body 16 in the second direction X2.

[0039] The sensor body 16, except for the magnetic core 18, the mounting portion 20, the restricting portion 22, and the installation portion 23 are integrally formed from, for example, resin.

[0040] The power conversion device 1 of this embodiment includes a connector 4 having a plurality of connector terminals 8, a power module 5 arranged at a distance from the connector 4 in a first direction X1 and having a plurality of connection terminals 9 corresponding to the plurality of connector terminals 8, a plurality of bus bars 6 connecting each of the connector terminals 8 to each of the connection terminals 9, and a current sensor 7 having a magnetic core 18 detecting a current flowing through each of the bus bars 6, wherein the plurality of connector terminals 8 and the plurality of connection terminals 9 are arranged side by side in a second direction X2 that intersects the first direction X1, and are arranged such that a first interval 10 between adjacent connector terminals 8 is different from a second interval 11 between adjacent connection terminals 9, and the plurality of bus bars 6 are arranged side by side in the second direction X2 and extend linearly between the connector terminals 8 and the connection terminals 9, and the current sensor 7 has a plurality of through holes 17 through which each bus bar 6 passes and which are surrounded by a magnetic core 18, and each through hole 17 is formed in a penetrating shape along the extension direction 14 of the corresponding bus bar 6.

[0041] According to this configuration, for a plurality of bus bars 6 that extend linearly to connect a plurality of connector terminals 8 and a plurality of connection terminals 9 having different spacing between the connector terminals 8 and the terminals, the through holes 17 of the current sensor 7 through which each bus bar 6 passes are formed in a penetrating shape along the extension direction 14 of the corresponding bus bar 6, thereby simplifying the structure and making the power conversion device 1 compact.

[0042] In addition, adjacent busbars 6 are arranged so that the third interval 15 between the busbars 6 gradually narrows from the larger interval of the first interval 10 and the second interval 11 to the smaller interval, and the current sensor 7 has a sensor body 16 that houses a magnetic core 18 and has a through hole 17 formed therein, and the sensor body 16 is bent between adjacent busbars 6 so that the portion through which one of the adjacent busbars 6 is inserted is inclined toward the smaller interval of the first interval 10 and the second interval 11 relative to the portion through which the other busbar 6 is inserted.

[0043] According to this configuration, the current sensor 7 can be made compact.

[0044] The current sensor 7 also has a mounting portion 20 on which the busbar 6 is placed, the mounting portion 20 being arranged on the narrow side of the third interval 15, and the sensor body 16 being arranged on the wide side of the third interval 15.

[0045] According to this configuration, a space for accommodating the magnetic core 18 can be secured.

[0046] The plurality of connector terminals 8 include a first connector terminal 8A, a second connector terminal 8B, and a third connector terminal 8C arranged in this order from one side 12 to the other side 13 in the second direction X2, the plurality of connection terminals 9 include a first connection terminal 9A, a second connection terminal 9B, and a third connection terminal 9C arranged in this order from one side 12 to the other side 13 in the second direction X2, and the plurality of bus bars 6 include a first bus bar 6A connecting the first connector terminal 8A and the first connection terminal 9A, a second bus bar 6B connecting the second connector terminal 8B and the second connection terminal 9B, and a third bus bar 6B connecting the third connector terminal 8C and the third connection terminal 9C. The sensor body 16 includes a first portion 16A having a through hole (first through hole 17A) through which the first bus bar 6A passes, a second portion 16B having a through hole (second through hole 17B) through which the second bus bar 6B passes, and a third portion 16C having a through hole (third through hole 17C) through which the third bus bar 6C passes, and is bent between the bus bars 6 such that the second portion 16B is inclined toward the smaller of the first interval 10 and the second interval 11 with respect to the first portion 16A, and the third portion 16C is inclined toward the smaller of the first interval 10 and the second interval 11 with respect to the second portion 16B.

[0047] This configuration also allows the current sensor 7 to be made compact.

[0048] Moreover, the first interval 10 may be formed to be narrower than the second interval 11.

[0049] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0050] 4 Connectors 5 Power Module 6 Busbar 6A 1st bus bar 6B Second bus bar 6C 3rd bus bar 7 Current Sensor 8 Connector terminals 8A 1st connector terminal 8B Second connector terminal 8C 3rd connector terminal 9 Connection terminal 9A First Connection Terminal 9B Second connection terminal 9C Third connection terminal 10 First Interval 11 Second Interval 12 One side 13 Other side 14 Stretching direction 15 Third Interval 16 Sensor body 16A Part 1 16B 2nd part 16C 3rd part 17 Through hole 17A 1st through hole 17B 2nd through hole 17C 3rd through hole 18 Magnetic core 20 Placement section X1 1st direction X2 2nd direction

Claims

1. a connector having a plurality of connector terminals; a power module disposed apart from the connector in a first direction and having a plurality of connection terminals corresponding to the plurality of connector terminals; a plurality of bus bars connecting the connector terminals to the connection terminals; a current sensor having a magnetic core for detecting a current flowing through each of the bus bars; Equipped with the plurality of connector terminals and the plurality of connection terminals are arranged side by side in a second direction that is a direction intersecting the first direction, and are arranged such that a first interval that is an interval between adjacent connector terminals is different from a second interval that is an interval between adjacent connection terminals, The plurality of bus bars are formed from plate material so that their outer shape is rectangular in plan view, are arranged side by side in the second direction, and extend linearly between the connector terminals and the connection terminals.

2. adjacent bus bars are arranged such that a third interval between the bus bars becomes gradually narrower from the larger interval of the first interval or the second interval toward the smaller interval, the current sensor has a sensor body in which the magnetic core is housed and in which a plurality of through holes are formed, through which the plurality of bus bars pass; 2. The power conversion device according to claim 1, wherein the sensor body is bent between the adjacent bus bars such that a portion through which one of the adjacent bus bars is inserted is inclined toward the smaller of the first spacing and the second spacing with respect to a portion through which the other bus bar is inserted.

3. the current sensor has a mounting portion on which the bus bar is mounted, the placement portion is disposed on the narrower side of the third interval, The power conversion device according to claim 2 , wherein the sensor body is disposed on the wider side of the third interval.

4. the plurality of connector terminals include a first connector terminal, a second connector terminal, and a third connector terminal arranged in order from one side to the other side in the second direction, the plurality of connection terminals include a first connection terminal, a second connection terminal, and a third connection terminal, which are arranged in order from one side to the other side in the second direction; the plurality of bus bars include a first bus bar connecting the first connector terminal and the first connection terminal, a second bus bar connecting the second connector terminal and the second connection terminal, and a third bus bar connecting the third connector terminal and the third connection terminal, 4. The power conversion device according to claim 2, wherein the sensor body has a first portion having the through hole through which the first bus bar passes, a second portion having the through hole through which the second bus bar passes, and a third portion having the through hole through which the third bus bar passes, and is bent between the bus bars such that the second portion is inclined toward the smaller of the first spacing and the second spacing relative to the first portion, and the third portion is inclined toward the smaller of the first spacing and the second spacing relative to the second portion.

5. The power conversion device according to any one of claims 1 to 4, wherein the first interval is formed to be narrower than the second interval.

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