Electrical components

Abstract

To provide an electrical component in which excessive heat transfer to a capacitor element is suppressed.SOLUTION: An electrical component 10 includes: a Y capacitor 30; bus bars 112, 122; and a housing 100 having a first storage space 101 for storing a motor 4, a second storage space 102 for storing the Y capacitor and the bus bars, and partition walls 153, 161. The Y capacitor is disposed diagonally opposite from the motor via the partition walls. The bus bars overlap a support base in a thickness direction and have Y-capacitor connecting portions 114, 124 that are connected to capacitor elements. Of regions located on one side from the Y-capacitor connecting portions in a width direction and the other side from the Y-capacitor connecting portions in the width direction, more than half of the capacitor elements are provided in target regions 114A, 124A on a side where the motor presence ratio is lower.SELECTED DRAWING: Figure 3

Description

Technical Field

[0004] ,

[0006] , , N-side capacitor element and N-side Y capacitor busbar (42) connected to N-side busbar , , , P side , The negative terminal of the high-voltage battery and the N-side busbar (122) connected to the inverter, , , ,

[0005] , , , , P side , , P-side capacitor element and N-side , The positive electrode of the high-voltage battery (2) and , , ), P-side capacitor element and P-side Y capacitor busbar (41) connected to P-side busbar, N-side capacitor element ( , , ,

[0001] The disclosure described in this specification relates to electrical components.

Background Art

[0002] Patent Document 1 describes a configuration in which a housing that houses a power module constituting an inverter circuit is disposed on the upper part of a housing that houses a gear train and a motor.

Prior Art Documents

Patent Documents

[0007] Because more than half of the capacitor elements (31, 32) are located in the target region (114A, 124A), which is the region where the proportion of motors (4) is low, excessive heat transfer from the motor to the capacitor elements (31, 32) is suppressed.

[0008] The reference numbers in parentheses above merely indicate the correspondence with the configurations described in the embodiments below, and do not in any way limit the technical scope. [Brief explanation of the drawing]

[0009] [Figure 1] It is an electrical circuit diagram of an electrical component. [Figure 2] It is a plan view of an electrical component. [Figure 3] It is a cross-sectional view of an electrical component. [Figure 4] It is a plan view for explaining the arrangement of a Y capacitor and a bus bar. [Figure 5] It is a plan view for explaining the arrangement of a Y capacitor and a bus bar. [Figure 6] It is a cross-sectional view for explaining the arrangement of a Y capacitor and a bus bar. [Figure 7] It is a plan view for explaining the arrangement of a Y capacitor and a bus bar in the second embodiment. [Figure 8] It is a plan view for explaining the arrangement of a Y capacitor and a bus bar in the third embodiment.

Mode for Carrying Out the Invention

[0010] Hereinafter, a plurality of modes for carrying out the present disclosure will be described while referring to the drawings. In each mode, the same reference numerals may be given to the parts corresponding to those described in the preceding mode, and redundant descriptions may be omitted. When only a part of the configuration is described in each mode, other modes described previously can be applied to the other parts of the configuration.

[0011] In addition, not only combinations of parts that are clearly stated to be combinable in each embodiment, but also embodiments, embodiments and modification examples, and modification examples can be partially combined with each other as long as there is no problem with the combination.

[0012] (First Embodiment) <Vehicle-mounted System> Figure 1 is an electrical circuit diagram of an electrical component 10 mounted on the in-vehicle system 1. The electrical component 10 is sometimes referred to as a power converter. The in-vehicle system 1 is equipped with a high-voltage battery 2, a motor generator 4, and the electrical component 10. The vehicle on which the in-vehicle system 1 is installed is a hybrid vehicle capable of switching between and / or combining the driving force of the engine and the driving force of the motor generator 4. The engine and the motor generator 4 are interconnected via a gear device 5. The gear device 5 has the role of transmitting power.

[0013] The electrical component 10 includes a P-side high-voltage wiring 10A, an N-side high-voltage wiring 10B, an inverter 11, a connecting busbar 14, a control circuit board 15, a smoothing capacitor 20, a Y-capacitor 30, and a housing 100 that houses these components. The P-side high-voltage wiring 10A is wiring connected to the positive terminal of the high-voltage battery 2. The N-side high-voltage wiring 10B is wiring connected to the negative terminal of the high-voltage battery 2. The P-side high-voltage wiring 10A is made of conductive material such as a P-side busbar 110. The N-side high-voltage wiring 10B is made of conductive material such as an N-side busbar 120.

[0014] The inverter 11 is connected to the P-side high-voltage wiring 10A and the N-side high-voltage wiring 10B. The inverter 11 has multiple semiconductor modules 12. Each semiconductor module 12 has two switching elements 13 and two diodes 13A. Two switching elements 13 are connected in series between the P-side high-voltage wiring 10A and the N-side high-voltage wiring 10B.

[0015] The P-side input terminal 11A, which is connected to the P-side high-voltage wiring 10A, is connected to the collector electrode of one of the two switching elements 13, which is located on the high-potential side. The N-side input terminal 11B, which is connected to the N-side high-voltage wiring 10B, is connected to the emitter of one of the two switching elements 13, which is located on the low-potential side. The anode of diode 13A is connected to the emitter of the corresponding switching element 13. The cathode of diode 13A is connected to the collector of the corresponding switching element 13.

[0016] Motor terminals 11C, which are connected to the motor generator 4, are connected to the emitter of the high-potential switching element 13 and the collector of the N-side switching element 13. Multiple switching elements 13 convert the DC power supplied from the high-voltage battery 2 into AC power that can be driven by the motor generator 4. The converted power is supplied to the motor generator 4 via the connecting busbar 14.

[0017] The control circuit board 15 controls the on / off state of multiple switching elements 13. The control circuit board 15 has a control circuit mounted on it that controls the on / off state of multiple switching elements 13. The connection terminals 11D of the multiple switching elements 13 are soldered to the control circuit board 15. The connection terminals 11D of the multiple switching elements 13 are electrically connected to the control circuit board 15.

[0018] The smoothing capacitor 20 primarily smooths the DC voltage supplied from the high-voltage battery 2. The smoothing capacitor 20 is connected to the P-side high-voltage wiring 10A and the N-side high-voltage wiring 10B. The smoothing capacitor 20 is connected in parallel to the inverter 11. The high-voltage wirings 10A and 10B electrically connect the inverter 11, the smoothing capacitor 20, and the high-voltage battery 2.

[0019] The Y capacitor 30 primarily removes noise components leaking from the inverter 11. The Y capacitor 30 has two capacitor elements 31 and 32, two Y capacitor busbars 41 and 42, and a GND busbar 50. Of the two capacitor elements 31 and 32, the one provided on the P-side high-voltage wiring 10A side may be referred to as the P-side capacitor element 31. Of the two capacitor elements 31 and 32, the one provided on the N-side high-voltage wiring 10B side may be referred to as the N-side capacitor element 32.

[0020] Of the two Y-capacitor busbars 41 and 42, the one connected to the P-side capacitor element 31 is sometimes referred to as the P-side Y-capacitor busbar 41. The P-side Y-capacitor busbar 41 has a P-side first busbar terminal 41A connected to the P-side capacitor element 31 and a P-side second busbar terminal 41B connected to the P-side high-voltage wiring 10A. The P-side capacitor element 31 is electrically connected to the P-side high-voltage wiring 10A via the P-side Y-capacitor busbar 41.

[0021] Of the two Y-capacitor busbars 41 and 42, the one connected to the N-side capacitor element 32 is sometimes referred to as the N-side Y-capacitor busbar 42. The N-side Y-capacitor busbar 42 has an N-side first busbar terminal 42A connected to the N-side capacitor element 32 and an N-side second busbar terminal 42B connected to the N-side high-voltage wiring 10B. The N-side capacitor element 32 is electrically connected to the N-side high-voltage wiring 10B via the N-side Y-capacitor busbar 42.

[0022] The GND busbar 50 has a P-side GND terminal 51 connected to the P-side capacitor element 31, an N-side GND terminal 52 connected to the N-side capacitor element 32, and a housing connection portion 54 connected to the housing 100. The GND busbar 50 extends to connect the P-side GND terminal 51, the N-side GND terminal 52, and the housing connection portion 54. The GND busbar 50 is connected to the capacitor elements 31 and 32, and is also electrically connected to the housing 100.

[0023] The GND busbar 50 is electrically connected to the body ground of the chassis, etc., via the enclosure 100. Capacitor elements 31 and 32 remove noise components leaking from the inverter 11 by directing them to the body ground via the GND busbar 50. In addition, capacitor elements 31 and 32 can remove not only noise components leaking from the inverter 11, but also noise components flowing through the high-voltage wiring 10A and 10B.

[0024] <Mechanical configuration of electrical components> Before describing the mechanical configuration of the electrical component 10, the drawings will be explained first. Figure 2 is a plan view of the electrical component 10. Figure 3 is a cross-sectional view of the electrical component 10. Figure 4 is a plan view illustrating the arrangement of the Y capacitor 30 and busbars 110 and 120. Figure 5 is a plan view of Figure 4 with busbars 110 and 120 removed. Figure 6 is a cross-sectional view illustrating the arrangement of capacitor elements 31 and 32 and busbars 110 and 120.

[0025] The P-side busbar 110 includes a P-side power busbar 111 and a P-side relay busbar 112. The P-side power busbar 111 connects the high-voltage battery 2 and the P-side capacitor element 31. The P-side relay busbar 112 connects the smoothing capacitor 20, the P-side capacitor element 31, and the power module 140 via a relay. The P-side relay busbar 112 connects the smoothing capacitor 20, the P-side capacitor element 31, and the power module 140. The portion of the P-side relay busbar 112 connected to the P-side capacitor element 31 is sometimes referred to as the P-side Y-con connector 114. The P-side power busbar 111, the P-side Y-con connector 114, and the P-side Y-capacitor busbar 41 are fastened together by fastening members 72, etc. The P-side power busbar 111, the P-side Y-con connector 114, and the P-side Y-capacitor busbar 41 are electrically and mechanically connected.

[0026] The N-side busbar 120 includes an N-side power busbar 121 and an N-side relay busbar 122. The N-side power busbar 121 connects the high-voltage battery 2 and the N-side capacitor element 32. The N-side relay busbar 122 connects the smoothing capacitor 20, the N-side capacitor element 32, and the power module 140 via a relay. The N-side relay busbar 122 connects the smoothing capacitor 20, the N-side capacitor element 32, and the power module 140. The portion of the N-side relay busbar 122 connected to the N-side capacitor element 32 is sometimes referred to as the N-side Y-con connector 124. The N-side power busbar 121, the N-side Y-con connector 124, and the N-side Y-capacitor busbar 42 are fastened together by fastening members 73, etc. The N-side power busbar 121, the N-side Y-con connector 124, and the N-side Y-capacitor busbar 42 are electrically and mechanically connected.

[0027] In addition to the components described above, the electrical component 10 includes a cooler 130 and a terminal block 170. The cooler 130 is a device for cooling multiple semiconductor modules 12. The terminal block 170 has fixed parts for connecting the P-side power busbar 111 to the high-voltage battery 2 and for connecting the N-side power busbar 121 to the high-voltage battery 2. The terminal block 170 may also be equipped with a current sensor for measuring the current of the semiconductor modules 12. Note that the connectors connecting the power busbars 111 and 121 to the high-voltage battery 2 are omitted from the drawing.

[0028] The power module 140 is composed of multiple semiconductor modules 12 and a cooler 130. The cooler 130 has a stacked cooling structure. The cooler 130 includes a supply pipe 131, a discharge pipe 132, and multiple intermediate pipes 133. The multiple intermediate pipes 133 are arranged in a ladder-like fashion between the supply pipe 131 and the discharge pipe 132. The supply pipe 131 and the discharge pipe 132 are connected via the intermediate pipes 133 in a manner that allows refrigerant to flow through them.

[0029] The semiconductor modules 12 are individually housed between adjacent relay tubes 133. The semiconductor modules 12 are sandwiched between adjacent relay tubes 133. The power module 140 is formed by housing the semiconductor modules 12 in the cooler 130. The heat from the semiconductor modules 12 is efficiently dissipated to the relay tubes 133. The cooler 130 is also fixed to the housing 100. The temperature of the cooler 130 is low because a coolant flows inside it. The temperature of the housing 100 is also low because the housing 100 is fixed to the cooler 130.

[0030] <Enclosure> The housing 100 has a first housing 150 and a second housing 160. The first housing 150 forms a container. The first housing 150 is made of a metal material. For example, the first housing 150 is made of aluminum die casting. The first housing 150 has a first bottom wall 151, a first side wall 152, and a first top wall 153. The first storage space 101 is formed by the first bottom wall 151, the first side wall 152, and the first top wall 153. The thickness direction of the first bottom wall 151 is sometimes referred to as the thickness direction TD. The two directions perpendicular to the thickness direction TD are sometimes referred to as the width direction WD and the depth direction DP. The first bottom wall 151 and the first top wall 153 are spaced apart in the thickness direction TD. The first side wall 152 has two walls spaced apart in the width direction WD and two walls spaced apart in the depth direction DP.

[0031] The second housing 160 forms a container. The second housing 160 is made of a metal material. For example, the second housing 160 is made of aluminum die casting. The second housing 160 has a second bottom wall 161, a second side wall 162, and a second top wall 163. The second storage space 102 is formed by the second bottom wall 161, the second side wall 162, and the second top wall 163. The second bottom wall 161 and the second top wall 163 are spaced apart in the thickness direction TD. The second side wall 162 has two walls spaced apart in the width direction WD and two walls spaced apart in the depth direction DP.

[0032] The first housing 150 and the second housing 160 overlap with respect to the thickness direction TD. The second housing 160 is positioned above the first housing 150 in the thickness direction TD+. The first housing 150 is positioned below the second housing 160 in the thickness direction TD-. The second bottom wall 161 of the second housing 160 is attached to the first top wall 153 of the first housing 150. The first housing 150 and the second housing 160 are fixed together via fixing members or the like. As a result, the first housing 150 and the second housing 160 are integrated in the thickness direction TD.

[0033] In other words, the enclosure 100 has a bottom wall 151, side walls 152 and 162, a top wall 163, and partition walls 153 and 161. The first top wall 153 and the second bottom wall 161 are sometimes collectively referred to as partition walls 153 and 161. The storage space 103 is formed by the bottom wall 151, the side walls 152 and 162, and the top wall 163. The storage space 103 is divided in the thickness direction TD by the partition walls 153 and 161. The first storage space 101 is formed by the bottom wall 151, part of the side walls 152 and 162, and partition walls 153 and 161. The second storage space 102 is formed by partition walls 153 and 161, the remaining part of the side walls 152 and 162, and the top wall 163.

[0034] The motor generator 4 and gear device 5 are housed in the first storage space 101. The motor generator 4 comprises a motor section 4A including a rotor and stator (windings), and a motor shaft 4B. The motor shaft 4B is located at the other end WD+ in the width direction of the first storage space 101. The motor shaft 4B is the rotation axis of the motor section 4A. The motor shaft 4B extends along the depth direction DP. The rotor is fixed to the motor shaft 4B. The stator is electrically connected to a power module 140 or the like via a connecting busbar 14. The motor section 4A is rotationally driven by the power module 140. The motor section 4A and the motor shaft 4B rotate around the rotation axis. The motor section 4A is a heat-generating component that generates heat through rotational drive.

[0035] The gear unit 5 has a first gear 5A and a second gear 5B. The first gear 5A is a toothed gear or planetary gear that passes through the motor shaft 4B. The motor unit 4A and the first gear 5A are passed through the motor shaft 4B so that they are aligned with the motor unit 4A in the depth direction DP. The second gear 5B is a toothed gear or differential gear that passes through the drive shaft 6. The drive shaft 6 is located at one end WD+ in the width direction. The motor shaft 4B and the drive shaft 6 are aligned in the width direction WD and housed in the first storage space 101. Power is transmitted from the motor unit 4A to the engine by the meshing of the first gear 5A and the second gear 5B.

[0036] The second storage space 102 contains a control circuit board 15, a smoothing capacitor 20, a power module 140, a Y capacitor 30, a P-side busbar 110, and an N-side busbar 120. Figure 2 shows a plan view of the second storage space 102 as seen from below in the thickness direction TD-. The power module 140 is located on the other side WD+ of the width direction WD. The Y capacitor 30 is located on one side WD- of the width direction WD. The P-side relay busbar 112 and the N-side relay busbar 122 are provided to connect the power module 140 and the Y capacitor 30.

[0037] A terminal block 170 is provided on the other side DP+ of the depth direction DP. A smoothing capacitor 20 is provided on the one side DP- in the depth direction. A Y capacitor 30 and a power module 140 are provided between the smoothing capacitor 20 and the terminal block 170. A P-side power busbar 111 and an N-side power busbar 121 are provided to connect the Y capacitor 30 and the terminal block 170.

[0038] Furthermore, as shown in Figure 3, the power module 140 and the motor generator 4 overlap in the thickness direction TD. A first through-hole 155 penetrating in the thickness direction TD is provided within the projection area of ​​the power module 140 on the first top wall 153. A second through-hole 165 penetrating in the thickness direction TD is provided within the projection area of ​​the power module 140 on the second bottom wall 161. The first through-hole 155 and the second through-hole 165 overlap to form a communication hole 175 through which the connecting busbar 14 can pass. The connecting busbar 14 passes through the communication hole 175. The power module 140 and the motor generator 4 are electrically connected via the connecting busbar 14. The size of the communication hole 175 is sufficient for the connecting busbar 14 to pass through.

[0039] As described above, a Y capacitor 30 is provided on one side WD- in the width direction of the second storage space 102. In the width direction WD, the Y capacitor 30 is provided diagonally opposite the motor generator 4 via the first top wall 153 and the second bottom wall 161. Note that the Y capacitor 30 and the motor generator 4 may partially overlap in the thickness direction TD. Alternatively, the Y capacitor 30 and the motor generator 4 may not overlap at all in the thickness direction TD. Because the first top wall 153 and the second bottom wall 161 are provided between the Y capacitor 30 and the motor generator 4, the radiant heat of the motor generator 4 is easily shielded by the first top wall 153 and the second bottom wall 161.

[0040] The second housing 160 also has a mounting wall 164 in addition to the second bottom wall 161, second side walls 162 and 163. With respect to the thickness direction TD, the mounting wall 164 is provided between the second bottom wall 161 and the second top wall 163. The mounting wall 164 is provided in the second storage space 102. The mounting wall 164 has a thin, flat shape in the thickness direction TD. The mounting wall 164 extends along a planar direction perpendicular to the thickness direction TD. As an example, the mounting wall 164 is separate from the second side wall 162. The mounting wall 164 is fixed to the second side wall 162 via fastening members or the like. Note that the mounting wall 164 and the second side wall 162 may be a single continuous unit.

[0041] A Y capacitor 30, a P-side busbar 110, and an N-side busbar 120 are provided in the region on the second bottom wall 161 side of the mounting wall 164. A control circuit board 15 is provided in the region on the second top wall 163 side of the mounting wall 164. The mounting wall 164 is provided with a third through-hole 166 for passing the power module 140 through. The third through-hole 166 is a hole that penetrates the mounting wall 164 in the thickness direction TD. The power module 140 is provided via the third through-hole 166, extending across both the region on the second bottom wall 161 side of the mounting wall 164 and the region on the second top wall 163 side of the mounting wall 164.

[0042] The control circuit board 15 is fixed to the surface 164A of the mounting wall 164, which is on the side of the second top wall 163. The connection terminal 11D of the power module 140 extends towards the control circuit board 15 through the third through hole 166. The connection terminal 11D and the control circuit board 15 are electrically connected. The Y capacitor 30 is fixed to the back surface 164B of the mounting wall 164, which is on the side of the second bottom wall 161.

[0043] <Yコンデンサ> In addition to the components described above, the Y capacitor 30 has a support base 60 and adhesive 64. The support base 60 supports the capacitor elements 31 and 32 and various busbars. The various busbars are the P-side power busbar 111, the P-side Y capacitor connection part 114, the N-side power busbar 121, the N-side Y capacitor connection part 124, the P-side Y capacitor busbar 41, the N-side Y capacitor busbar 42, and the GND busbar 50.

[0044] The support base 60 has a first support portion 61, a second support portion 62, a capacitor support portion 63, and an adhesive 64. The support base 60 is formed primarily of resin as an example. The first support portion 61, the second support portion 62, and the capacitor support portion 63 are arranged in the order of first support portion 61, capacitor support portion 63, and second support portion 62 from one side DP- in the depth direction to the other side DP+ in the depth direction. The first support portion 61, the capacitor support portion 63, and the second support portion 62 are integrated using the same material. The first support portion 61, the capacitor support portion 63, and the second support portion 62 are continuous in the depth direction DP.

[0045] First, let's describe the capacitor support portion 63. The capacitor support portion 63 is the part that supports the capacitor elements 31 and 32. Adhesive 64 is provided on the capacitor support portion 63. The capacitor elements 31 and 32 are fixed to the capacitor support portion 63 via the adhesive 64. The capacitor support portion 63 forms a single container. The capacitor support portion 63 has a support bottom wall 65, a support side wall 66, and a support partition wall 67.

[0046] A support bottom wall 65 is fixed to the back surface 164B of the mounting wall 164. The support side wall 66 extends toward the second bottom wall 161 so as to move away from the support bottom wall 65. The support bottom wall 65 and the support side wall 66 partition the element storage spaces 68 and 69 for housing the capacitor elements 31 and 32. A support partition wall 67 is connected to the support bottom wall 65 and the support side wall 66 so as to divide the element storage spaces 68 and 69 in the width direction WD.

[0047] The height of the support partition wall 67 is lower than the height of the support side wall 66. In other words, the tip of the support side wall 66 is further from the mounting wall 164 than the tip of the support partition wall 67. Also, the height of the support side wall 66 is lower than the height of the capacitor elements 31 and 32. In other words, the tips of the capacitor elements 31 and 32 are further from the mounting wall 164 than the tip of the support side wall 66.

[0048] The first element housing space 68 is partitioned by the portion of the support bottom wall 65 on one side in the width direction WD-, the portion of the support side wall 66 on one side in the width direction WD-, and the support partition wall 67. The P-side capacitor element 31 is housed in the first element housing space 68. Adhesive 64 is also provided on the support bottom wall 65 of the first element housing space 68. The bottom of the P-side capacitor element 31 is fixed to the support bottom wall 65 of the first element housing space 68 via the adhesive 64. The height of the P-side capacitor element 31 is greater than the height of the support side wall 66 and the height of the support partition wall 67. The height refers to the distance to the tip when the mounting wall 164 is used as a reference. The portion of the P-side capacitor element 31 other than the bottom is exposed to the outside air.

[0049] The P-side capacitor element 31 extends in the thickness direction TD and has a P-side first element terminal 31A and a P-side second element terminal 31B. The P-side first element terminal 31A and the P-side second element terminal 31B are spaced apart in the depth direction DP. The P-side first element terminal 31A is located at the other end in the depth direction DP+. The P-side second element terminal 31B is located at one end in the depth direction DP-. A P-side Y-capacitor busbar 41 is connected to the P-side first element terminal 31A. The P-side first element terminal 31A is electrically connected to the P-side power busbar 111 and the P-side Y-capacitor connection part 114 via the P-side Y-capacitor busbar 41. A GND busbar 50 is connected to the P-side second element terminal 31B.

[0050] The second element housing space 69 is partitioned by the portion of the support bottom wall 65 on the other side WD+ in the width direction, the portion of the support side wall 66 on the other side WD+ in the width direction, and the support partition wall 67. The N-side capacitor element 32 is housed in the second element housing space 69. Adhesive 64 is also provided on the support bottom wall 65 of the second element housing space 69. The bottom of the N-side capacitor element 32 is fixed to the support bottom wall 65 of the second element housing space 69 via the adhesive 64. The height of the N-side capacitor element 32 is greater than the height of the support side wall 66 and the height of the support partition wall 67. The height refers to the distance to the tip when the mounting wall 164 is used as the reference point. The portion of the N-side capacitor element 32 other than the bottom is exposed to the outside air.

[0051] The N-side capacitor element 32 extends in the thickness direction TD and has an N-side first element terminal 32A and an N-side second element terminal 32B. The N-side first element terminal 32A is located on the other end DP+ in the depth direction. The N-side second element terminal 32B is located on one end DP- in the depth direction. An N-side Y-capacitor busbar 42 is connected to the N-side first element terminal 32A. The N-side first element terminal 32A is electrically connected to the N-side power busbar 121 and the N-side Y-capacitor connection part 124 via the N-side Y-capacitor busbar 42. A GND busbar 50 is connected to the N-side second element terminal 32B.

[0052] The first support portion 61 is the part that supports the GND busbar 50. The GND busbar 50 has a P-side GND terminal 51 connected to the P-side second element terminal 31B, an N-side GND terminal 52 connected to the N-side second element terminal 32B, and a connecting portion 53 that is connected to the P-side GND terminal 51 and the N-side GND terminal 52 and is supported by the first support portion 61. The connecting portion 53 is fixed to the first support portion 61 and the mounting wall 164 via a first fastening member 71. The connecting portion 53 is electrically connected to the mounting wall 164 via the first fastening member 71.

[0053] A conductive collar is provided around the first fastening member 71 to electrically connect the first fastening member 71 to the mounting wall 164. The current flowing through the GND busbar 50 flows to the mounting wall 164 via the first fastening member 71 and the collar. The current flowing through the GND busbar 50 flows to the body ground via the first fastening member 71, the collar, and the mounting wall 164.

[0054] The second support section 62 is the part that supports the Y-con connectors 114 and 124, the capacitor busbars 41 and 42, and the power busbars 111 and 121. The Y-con connectors 114 and 124, the capacitor busbars 41 and 42, and the power busbars 111 and 121 are fixed to the second support section 62 via fastening members 72 and 73. The Y-con connectors 114 and 124, the capacitor busbars 41 and 42, and the power busbars 111 and 121 are fastened together by the fastening members 72 and 73 and are electrically connected to each other.

[0055] More specifically, the portion of the second support 62 on one side in the width direction WD- supports the P-side Y-con connector 114, the P-side Y-capacitor busbar 41, and the P-side power supply busbar 111. The P-side Y-con connector 114, the P-side Y-capacitor busbar 41, and the P-side power supply busbar 111 are fixed to the second support 62 via the second fastening member 72. The P-side Y-con connector 114, the P-side Y-capacitor busbar 41, and the P-side power supply busbar 111 are fastened together by the second fastening member 72 and are electrically connected to each other.

[0056] The portion on the other end side WD+ in the width direction in the second support portion 62 supports the N-side Y-connector connection portion 124, the N-side Y-capacitor bus bar 42, and the N-side power bus bar 121. The N-side Y-connector connection portion 124, the N-side Y-capacitor bus bar 42, and the N-side power bus bar 121 are fixed to the second support portion 62 via the third fastening member 73. The N-side Y-connector connection portion 124, the N-side Y-capacitor bus bar 42, and the N-side power bus bar 121 are fastened together by the third fastening member 73 and are electrically connected to each other.

[0057] Regarding the P-side capacitor element 31, in the direction from one side DP- in the depth direction to the other end side DP+ in the depth direction, the first fastening member 71, the P-side capacitor element 31, and the second fastening member 72 are arranged in this order. Although it will be described in detail later, the P-side Y-connector connection portion 114 extends in the depth direction DP so as to straddle the first support portion 61 and the second support portion 62 in the lower side TD- in the thickness direction of the first element storage space 68. The longitudinal direction of the P-side Y-connector connection portion 114 coincides with the depth direction DP. It can also be said that the first fastening member 71, the P-side capacitor element 31, and the second fastening member 72 are arranged in this order along the longitudinal direction of the P-side Y-connector connection portion 114.

[0058] Regarding the N-side capacitor element 32, in the direction from one side DP- in the depth direction to the other end side DP+ in the depth direction, the first fastening member 71, the N-side capacitor element 32, and the third fastening member 73 are arranged in this order. Although it will be described in detail later, the N-side Y-connector connection portion 124 extends in the depth direction DP so as to straddle the first support portion 61 and the second support portion 62 in the lower side TD- in the thickness direction of the second element storage space 69. The longitudinal direction of the N-side Y-connector connection portion 124 coincides with the depth direction DP. It can also be said that the first fastening member 71, the N-side capacitor element 32, and the third fastening member 73 are arranged in this order along the longitudinal direction of the N-side Y-connector connection portion 124. Note that the first fastening member 71 may be referred to as a GND-side fastening member. The second fastening member 72 and the third fastening member 73 may be referred to as connection portion-side fastening members.

[0059] <P-side Y-capacitor element and P-side Y-connector connection portion> As described above, the P-side relay busbar 112 connects the smoothing capacitor 20, the Y-capacitor 30, and the power module 140. The part of the P-side relay busbar 112 connected to the smoothing capacitor 20 is sometimes referred to as the P-side capacitor connection part 113. The part of the P-side relay busbar 112 connected to the power module 140 is sometimes referred to as the P-side power module connection part 115. A P-side Y-capacitor connection part 114 is provided on one side WD- in the width direction of the P-side capacitor connection part 113. A P-side power module connection part 115 is provided on the other end WD+ in the width direction of the P-side capacitor connection part 113.

[0060] The P-side capacitor connection portion 113 is provided so as to overlap the smoothing capacitor 20. The P-side Y-con connection portion 114 extends in the depth direction toward the other end DP+ so as to move away from the P-side capacitor connection portion 113. The P-side Y-con connection portion 114 extends in the depth direction toward the other end DP+ so as to overlap the Y-capacitor 30 in the thickness direction TD on the second bottom wall 161 side. The P-side Y-con connection portion 114 extends in the depth direction toward the other end DP+ so as to overlap the support bottom wall 65 and the support side wall 66 that define the first element storage space 68 in the thickness direction TD. The P-side capacitor element 31 and the P-side Y-con connection portion 114 are separated in the thickness direction TD.

[0061] The P-side capacitor element 31 is provided in the first element storage space 68 such that more than half of the P-side capacitor element 31 is located on one side WD- in the width direction WD relative to the P-side Y-con connection part 114. The P-side first element terminal 31A and the P-side second element terminal 31B are provided approximately in the center of the P-side capacitor element 31 in the width direction WD. The P-side first element terminal 31A and the P-side second element terminal 31B are arranged side by side along the depth direction DP.

[0062] It can also be said that the P-side capacitor element 31 is provided in the first element housing space 68 such that the P-side first element terminal 31A and the P-side second element terminal 31B are located one side WD- in the width direction WD from the P-side Y-con connection part 114. It can also be said that the connection part between the P-side first element terminal 31A and the P-side Y-capacitor busbar 41, and the connection part between the P-side second element terminal 31B and the GND busbar 50 are provided one side WD- in the width direction from the P-side Y-con connection part 114.

[0063] As described above, the motor generator 4 is provided on the other side of the width direction WD. In this embodiment, as an example, the P-side Y-connector connection 114 and the motor generator 4 do not overlap with respect to the thickness direction TD. The entirety of the motor generator 4 is provided on the other side of the width direction WD+ from the P-side Y-connector connection 114. The motor generator 4 is not provided on the one side of the width direction WD- from the P-side Y-connector connection 114.

[0064] The side WD- in the width direction from the P-side Y-con connection 114 is the side where the proportion of motor generator 4 is smaller than the other side WD+ in the width direction. The region where the proportion of motor generator 4 is smaller than from the P-side Y-con connection 114 is sometimes referred to as the P-side target region 114A. It can also be said that the P-side capacitor element 31 is provided in the first element housing space 68 such that more than half of the P-side capacitor element 31 is located in the P-side target region 114A.

[0065] With respect to the width direction WD, the connection point between the P-side first element terminal 31A and the P-side Y capacitor busbar 41, and the connection point between the P-side second element terminal 31B and the GND busbar 50 are located adjacent to the P-side Y capacitor connection part 114. It can also be said that the P-side capacitor element 31 is provided in the first element housing space 68 such that the connection point between the P-side first element terminal 31A and the P-side Y capacitor busbar 41, and the connection point between the P-side second element terminal 31B and the GND busbar 50 are located in the P-side target area 114A.

[0066] Also, as described above, one end of the P-side Y-capacitor bus bar 41 is connected to the P-side first element terminal 31A, and the other end is connected to the P-side power supply bus bar 111 and the P-side Y-con connection part 114. The P-side intermediate part between one end and the other end in the P-side Y-capacitor bus bar 41 is provided in the P-side target area 114A. The P-side intermediate part extends in the depth direction DP along the P-side Y-con connection part 114 in the P-side target area 114A. In the thickness direction TD, the P-side intermediate part and the P-side Y-con connection part 114 do not overlap.

[0067] Note that not all of the motor generator 4 may be provided on the other side WD+ in the width direction than the P-side Y-con connection part 114. For example, a part of the motor generator 4 may be provided on one side WD- in the width direction than the P-side Y-con connection part 114, and more than half of the motor generator 4 may be provided on the other side WD+ in the width direction than the P-side Y-con connection part 114. Even in that case, one side WD- in the width direction than the P-side Y-con connection part 114 corresponds to the side where the occupancy ratio of the motor generator 4 is small.

[0068] Also, in the present embodiment, the part on the other end side WD+ in the width direction than the P-side element terminals 31A and 31B in the P-side capacitor element ۳۱ overlaps with the P-side Y-con connection part 114 in the thickness direction TD. However, the form is not limited to the part on the other end side WD+ in the width direction than the P-side element terminals 31A and 31B in the P-side capacitor element 31 overlapping with the P-side Y-con connection part 114 in the thickness direction TD. All of the P-side capacitor element 31 may not overlap with the P-side Y-con connection part 114 in the thickness direction TD.

[0069] <N-side Y-capacitor element and N-side Y-con connection part> The portion of the N-side relay busbar 122 connected to the Y capacitor 30 is sometimes referred to as the N-side Y capacitor connection portion 124. The portion of the N-side relay busbar 122 connected to the power module 140 is sometimes referred to as the N-side power module connection portion 125. The N-side Y capacitor connection portion 124 is provided on one side WD- in the width direction of the N-side capacitor connection portion 123. The N-side power module connection portion 125 is provided on the other end WD+ in the width direction of the N-side capacitor connection portion 123.

[0070] The N-side capacitor connection portion 123 is provided so as to overlap the smoothing capacitor 20. The N-side Y-con connection portion 124 extends in the depth direction to the other side DP+ so as to move away from the N-side capacitor connection portion 123. The N-side Y-con connection portion 124 extends in the depth direction to the other side DP+ so as to overlap the Y-capacitor 30 in the thickness direction TD on the second bottom wall 161 side. The N-side Y-con connection portion 124 extends in the depth direction DP so as to overlap the support bottom wall 65 and the support side wall 66 that define the second element storage space 77 in the thickness direction TD. The N-side capacitor element 32 and the N-side Y-con connection portion 124 are separated with respect to the thickness direction TD.

[0071] The N-side capacitor element 32 is provided in the second element storage space 77 such that more than half of the N-side capacitor element 32 is located on one side WD- in the width direction relative to the N-side Y-con connection part 124. The N-side first element terminal 32A and the N-side second element terminal 32B are provided approximately in the center of the N-side capacitor element 32 with respect to the width direction WD. The N-side first element terminal 32A and the N-side second element terminal 32B are arranged side by side along the depth direction DP.

[0072] To that end, it can be said that the N-side capacitor element 32 is provided in the second element housing space 77 such that the N-side first element terminal 32A and the N-side second element terminal 32B are located on one side WD- in the width direction from the N-side Y-con connection part 124. It can also be said that the connection point between the N-side first element terminal 32A and the N-side Y-capacitor busbar 42, and the connection point between the N-side second element terminal 32B and the GND busbar 50 are provided on one side WD- in the width direction from the N-side Y-con connection part 124.

[0073] As described above, the motor generator 4 is provided on the other side WD+ in the width direction. The side WD- in the width direction from the N side Y connector connection 124 corresponds to the side with a smaller proportion of motor generator 4. In this embodiment, as an example, the N side Y connector connection 124 and the motor generator 4 do not overlap with respect to the thickness direction TD. All of the motor generator 4 is provided on the other side WD in the width direction from the N side Y connector connection 124. The motor generator 4 is not provided on the side WD- in the width direction from the N side Y connector connection 124.

[0074] Thus, the side WD- in the width direction from the N-side Y-con connection 124 is the side where the proportion of the motor generator 4 is smaller than that of the N-side Y-con connection 124 and the other side WD+ in the width direction. The side where the proportion of the motor generator 4 is smaller than that of the N-side Y-con connection 124 is sometimes referred to as the N-side target region 124A. It can also be said that the N-side capacitor element 32 is provided in the second element housing space 77 such that more than half of the N-side capacitor element 32 is located in the N-side target region 124A.

[0075] With respect to the width direction WD, the connection point between the N-side first element terminal 32A and the N-side Y capacitor busbar 42, and the connection point between the N-side second element terminal 32B and the GND busbar 50 are located adjacent to the N-side Y capacitor connection section 124. It can also be said that the N-side capacitor element 32 is provided in the second element housing space 69 such that the connection point between the N-side first element terminal 32A and the N-side Y capacitor busbar 42, and the connection point between the N-side second element terminal 32B and the GND busbar 50 are located in the N-side target area 124A.

[0076] As described above, one end of the N-side Y capacitor busbar 42 is connected to the N-side first element terminal 32A, and the other end is connected to the N-side power busbar 121 and the N-side Y capacitor connection section 124. The N-side intermediate portion of the N-side Y capacitor busbar 42, between the one end and the other, is provided in the N-side target region 124A. The N-side intermediate portion extends in the depth direction DP along the N-side Y capacitor connection section 124 in the N-side target region 124A. With respect to the thickness direction TD, the N-side intermediate portion and the N-side Y capacitor connection section 124 do not overlap.

[0077] Furthermore, it is not necessary for the entire motor generator 4 to be located on the other side WD+ in the width direction from the N-side Y-con connection 124. For example, a portion of the motor generator 4 may be located on the one side WD- in the width direction from the N-side Y-con connection 124, and more than half of the motor generator 4 may be located on the other side WD+ in the width direction from the N-side Y-con connection 124. Even in this case, the one side WD- in the width direction from the N-side Y-con connection 124 corresponds to the side with a smaller proportion of the motor generator 4.

[0078] Furthermore, in this embodiment, the portion of the N-side capacitor element 32 on the other end in the width direction WD+, relative to the N-side element terminals 32A and 32B, overlaps with the N-side Y-con connection portion 124 with respect to the thickness direction TD. However, the embodiment is not limited to the configuration in which the portion of the N-side capacitor element 32 on the other end in the width direction WD+, relative to the N-side element terminals 32A and 32B, overlaps with the N-side Y-con connection portion 124 with respect to the thickness direction TD. The entire N-side capacitor element 32 may not overlap with the N-side Y-con connection portion 124 with respect to the thickness direction TD.

[0079] <Effects and Effects> In recent years, with the increase in switching speeds in inverters and the tightening of EMC standards, bandwidths that were not previously problematic have become an issue, and noise reduction in these bandwidths is required. Therefore, it is necessary to install Y-capacitors in electrical components such as power converters to remove noise. Generally, capacitors are required to be used below their heat rating, taking into account self-heating and heat dissipation. Y-capacitors are also required to be used below their heat rating. Among the components installed in electrical equipment such as power converters, Y-capacitors have the lowest heat rating. For this reason, it has been necessary to devise ways to arrange and install Y-capacitors.

[0080] The electrical component 10 includes a Y capacitor 30, a P-side busbar 110, an N-side busbar 120, and a housing 100. The Y capacitor 30 includes capacitor elements 31 and 32, and a support base 60 that supports the capacitor elements 31 and 32. The P-side busbar 110 is electrically connected to the P-side capacitor element 31 and the inverter 11. The N-side busbar 120 is electrically connected to the N-side capacitor element 32 and the inverter 11.

[0081] The housing 100 has a first storage space 101, a second storage space 102, and partition walls 153 and 161 that separate the first storage space 101 and the second storage space 102. The motor generator 4 connected to the inverter 11 is housed in the first storage space 101. The Y capacitor 30, the P-side busbar 110, and the N-side busbar 120 are housed in the second storage space 102. The P-side busbar 110 has a P-side Y-con connector 114 that overlaps with the support base 60 and is connected to the P-side capacitor element 31 with respect to the thickness direction TD. The N-side busbar 120 has an N-side Y-con connector 124 that overlaps with the support base 60 and is connected to the N-side capacitor element 32 with respect to the thickness direction TD.

[0082] The Y capacitor 30 and the motor generator 4 are arranged diagonally opposite each other in the width direction WD of the housing 100. With respect to the thickness direction TD, the Y capacitor connection parts 114, 124 and the motor generator 4 may or may not overlap. In the first embodiment, as an example, the Y capacitor connection parts 114, 124 and the motor generator 4 do not overlap. More than half of the P-side capacitor element 31 is provided in the region 114A, which is the region located WD- on one side of the width direction from the P-side Y capacitor connection part 114 and the region located WD+ on the other side of the width direction, on the side where the motor generator 4 has a lower presence ratio. More than half of the N-side capacitor element 32 is provided in the region 124A, which is the region located WD- on one side of the width direction from the N-side Y capacitor connection part 124 and the region located WD+ on the other side of the width direction, on the side where the motor generator 4 has a lower presence ratio.

[0083] According to this, excessive heat transfer from the motor generator 4 to the capacitor elements 31 and 32 is suppressed. Excessive heat transfer from the P-side Y-con connection 114 to the P-side capacitor element 31 is suppressed. Excessive heat transfer from the N-side Y-con connection 124 to the N-side capacitor element 32 is suppressed. A decrease in the performance of the P-side capacitor element 31 and the N-side capacitor element 32 is suppressed.

[0084] The Y capacitor 30 has a P-side Y capacitor busbar 41 connected to the P-side first element terminal 31A of the P-side capacitor element 31, and an N-side Y capacitor busbar 42 connected to the N-side first element terminal 32A of the N-side capacitor element 32. The connection point between the P-side first element terminal 31A and the P-side Y capacitor busbar 41 is provided in the P-side target region 114A, which is the region where the proportion of the motor generator 4 is low. This suppresses excessive heat transfer from the motor generator 4 and the P-side Y capacitor connection part 114 to the connection point between the P-side first element terminal 31A and the P-side Y capacitor busbar 41. This suppresses the connection point, which tends to get hot, from becoming too hot. This makes it easier to efficiently suppress a decrease in the performance of the P-side capacitor element 31. The same can be said for the N-side target region 124A.

[0085] The P-side intermediate portion of the P-side Y capacitor busbar 41 extends in the depth direction DP along the P-side Y capacitor connection portion 114 in the P-side target region 114A. The N-side intermediate portion of the N-side Y capacitor busbar 42 extends in the depth direction DP along the N-side Y capacitor connection portion 124 in the N-side target region 124A. This suppresses excessive heat transfer from the motor generator 4 and the P-side Y capacitor connection portion 114 to the P-side intermediate portion and the N-side intermediate portion. It suppresses the P-side capacitor element 31 from becoming hot via the P-side intermediate portion. It suppresses the N-side capacitor element 32 from becoming hot via the N-side capacitor element 32.

[0086] The Y capacitor 30 further has a GND busbar 50 that connects the capacitor elements 31 and 32 to the housing 100. The housing 100 is electrically connected to the body ground, such as the chassis. The capacitor elements 31 and 32 remove noise components leaking from the inverter 11 by directing them to the body ground via the GND busbar 50, thereby removing noise components from the inverter 11.

[0087] The P-side capacitor element 31 has a P-side first element terminal 31A connected to the P-side Y capacitor busbar 41 and a P-side second element terminal 31B connected to the GND busbar 50. The P-side first element terminal 31A and the P-side second element terminal 31B are arranged side by side along the depth direction DP. With respect to the depth direction DP, the second fastening member 72 that fastens the P-side Y capacitor busbar 41 and the P-side Y capacitor connection part 114 are arranged in the order of the P-side capacitor element 31 and the first fastening member 71 that fastens the GND busbar 50 and the housing 100. As a result, the current path from the first fastening member 71 to the second fastening member 72 is shortened. The impedance from the first fastening member 71 to the second fastening member 72 can be suppressed. The same can be said for the N-side. With respect to the N-side, the current path from the first fastening member 71 to the third fastening member 73 is shortened. The impedance from the first fastening member 71 to the third fastening member 73 can be suppressed.

[0088] The support base 60 has a capacitor support section 63 that supports capacitor elements 31 and 32, a first support section 61 that supports the first fastening member 71, and a second support section 62 that supports the second fastening member 72 and the third fastening member 73. With respect to the depth direction DP, the first support section 61, the capacitor support section 63, and the second support section 62 are connected by the same material. This eliminates the need for gaps between adjacent support sections compared to when the first support section 61, the second support section 62, and the capacitor support section 63 are arranged separately. The current path from the first fastening member 71 to the second fastening member 72, and the current path from the first fastening member 71 to the third fastening member 73 can be shortened. The impedance from the first fastening member 71 to the second fastening member 72, and the impedance from the first fastening member 71 to the third fastening member 73 can be suppressed.

[0089] The Y capacitor 30 further has an adhesive 64. The support base 60 has a first support part 61, a second support part 62, a capacitor support part 63, and the adhesive 64. The capacitor support part 63 is the part that supports the capacitor elements 31 and 32. The adhesive 64 is provided on the support bottom wall 65 of the capacitor support part 63. The bottoms of the capacitor elements 31 and 32 are fixed to the support bottom wall 65 via the adhesive 64. The parts of the capacitor elements 31 and 32 other than the bottoms are exposed to the outside air. When fixing the capacitor elements 31 and 32, the heat dissipation of the capacitor elements 31 and 32 can be improved by not covering them with resin.

[0090] The portion of the P-side capacitor element 31 on the other side in the width direction WD+ from the P-side element terminals 31A and 31B overlaps with the P-side Y-converter connection portion 114 with respect to the thickness direction TD. The portion of the P-side capacitor element 31 including the P-side element terminals 31A and 31B is located in the P-side target region 114A on the other side in the width direction WD- from the P-side Y-converter connection portion 114. This suppresses the P-side capacitor element 31 from becoming too hot while also suppressing an increase in the size of the Y-converter 30 with respect to the width direction WD. Alternatively, the entire P-side capacitor element 31 may not overlap with the P-side Y-converter connection portion 114 with respect to the thickness direction TD. In this case, the P-side capacitor element 31 is moved away from the P-side Y-converter connection portion 114 and the motor generator 4 in the width direction WD, thus efficiently suppressing the P-side capacitor element 31 from becoming too hot. The same applies to the N-side capacitor element 32.

[0091] The Y capacitor 30 includes a P-side capacitor element 31, an N-side capacitor element 32, a P-side Y capacitor busbar 41, and an N-side Y capacitor busbar 42. The P-side relay busbar 112 has a P-side Y capacitor connection section 114. The N-side relay busbar 122 has an N-side Y capacitor connection section 124. The P-side capacitor element 31 and the P-side Y capacitor connection section 114 are connected via the P-side Y capacitor busbar 41. A first connection section, which is the connection point between the P-side capacitor element 31 and the P-side Y capacitor busbar 41, is provided in the P-side target region 114A.

[0092] The N-side capacitor element 32 and the N-side Y-con connector 124 are connected via the N-side Y-con connector busbar 42. A second connection point, which is the connection point between the N-side capacitor element 32 and the N-side Y-con connector busbar 42, is provided in the N-side target region 124A. With respect to the width direction WD, the two connection points and the two Y-con connectors 114 and 124 are arranged in the order of the first connection point, the P-side Y-con connector 114, the second connection point, and the N-side Y-con connector 124, from the one end WD- in the width direction to the other end WD+ in the width direction. This simple arrangement can suppress the P-side capacitor element 31 and the N-side capacitor element 32 from becoming overheated.

[0093] The Y capacitor 30 has a GND busbar 50 that connects the P-side capacitor element 31, the N-side capacitor element 32, and the housing 100. The GND busbar 50 is connected to the housing 100 between the two capacitor elements 31 and 32 in the width direction WD. This allows noise current passing through the P-side capacitor element 31 and the N-side capacitor element 32 to be directed to ground with a short wiring length.

[0094] (Second Embodiment) Figure 7 is a plan view illustrating the arrangement of capacitor elements 31 and 32 and Y-connector connections 114 and 124 in the second embodiment. In the second embodiment, the P-side capacitor element 31 and the N-side capacitor element 32 are arranged such that the P-side element terminals 31A and 31B and the N-side element terminals 32A and 32B are provided in the P-side target region 114A. In the P-side target region 114A, the P-side capacitor element 31 and the N-side capacitor element 32 are arranged side by side in the depth direction DP.

[0095] As an example of wiring, the N-side Y capacitor busbar 42 is connected to the N-side Y capacitor connection 124 and the P-side Y capacitor connection 114. The P-side Y capacitor busbar 41 is connected to the P-side Y capacitor connection 114 and the P-side first element terminal 31A. The P-side second element terminal 31B and the N-side first element terminal 32A are connected via busbars, etc. The GND busbar 50 is connected to the N-side second element terminal 32B and the housing 100. This also produces the same effects as in the first embodiment.

[0096] (Third embodiment) Figure 8 is a plan view illustrating the arrangement of the capacitor element 31 and the Y-con connection parts 114 and 124 in the third embodiment. In the third embodiment, the P-side capacitor element 31 is arranged such that the P-side element terminals 31A and 31B are provided in the P-side target region 114A.

[0097] As an example of wiring, the N-side Y capacitor busbar 42 is connected to the N-side Y capacitor connection 124 and the P-side Y capacitor connection 114. The P-side Y capacitor busbar 41 is connected to the P-side Y capacitor connection 114 and the P-side first element terminal 31A. The GND busbar 50 is connected to the P-side second element terminal 31B and the housing 100. This also produces the same effect as in the first embodiment.

[0098] This disclosure is described in accordance with embodiments, but it is understood that this disclosure is not limited to such embodiments or structures. This disclosure also includes various modifications and variations within the scope of equivalents. In addition, while various combinations and forms are shown in this disclosure, other combinations and forms that include one, more, or fewer of those elements also fall within the scope and idea of ​​this disclosure. [Explanation of Symbols]

[0099] 100 Enclosure, 101 First storage space, 102 Second storage space, 11 Inverter, 112 Busbar, 114 Y-con connector, 114 P-side Y-con connector, 114A Target area, 114A P-side target area, 122 Busbar, 124 Y-con connector, 124 N-side Y-con connector, 124A Target area, 124A N-side target area, 153, 161 Partition wall, 30 Y-capacitor, 31 Capacitor element, 31 P-side capacitor element, 31A, 31B First element terminal, 31B Second element terminal, 32 Capacitor element, 32 N-side capacitor element, 32B Second element terminal, 4 Motor, 41 Y-capacitor busbar, 41 P-side Y-capacitor busbar, 42 Y-capacitor busbar, 42 N-side Y-capacitor busbar, 50 GND busbar, 60 support base, 61 first support part, 62 second support part, 63 capacitor support part, 64 adhesive, 71 GND side fastening member, 72, 73 connection part side fastening members, TD thickness direction, WD width direction, DP depth direction

Claims

1. A positive terminal of a high-voltage battery (2) and a P-side busbar (112) connected to an inverter (11), The negative terminal of the high-voltage battery and the N-side busbar (122) connected to the inverter, A Y capacitor (30) having a P-side capacitor element (31), a P-side Y capacitor busbar (41) connected to the P-side capacitor element and the P-side busbar, an N-side capacitor element (32), an N-side Y capacitor busbar (42) connected to the N-side capacitor element and the N-side busbar, and a support base (60) including a support surface for supporting the P-side capacitor element and the N-side capacitor element, The system comprises the Y capacitor, the P-side busbar, the N-side busbar, and a housing (100) that houses the motor (4) connected to the inverter. The housing has a first housing space (101) for housing the motor, a second housing space (102) for housing the Y capacitor, the P-side busbar, and the N-side busbar, and partition walls (153, 161) that separate the first housing space and the second housing space in the thickness direction (TD), The P-side busbar overlaps the support surface with respect to the thickness direction and has a P-side Y-con connector portion (114) that is connected to the P-side Y-con connector busbar. The N-side busbar overlaps the support surface with respect to the thickness direction and has an N-side Y capacitor connection portion (124) that is connected to the N-side Y capacitor busbar. With respect to the width direction (WD) in which the P-side Y-con connection portion and the N-side Y-con connection portion are aligned when viewed from the thickness direction, the Y-capacitor is positioned diagonally opposite the motor via the partition wall. The P-side Y-connector and the N-side Y-connector, and the motor are non-overlapping with respect to the thickness direction. More than half of the P-side capacitor element is provided at the first portion, which is a part of the support surface located on the side furthest from the motor than the end of the P-side Y-connection portion furthest from the motor in the width direction. An electrical component in which more than half of the N-side capacitor element is provided at a second portion, which is a portion of the support surface, located on the side further from the motor than the end of the N-side Y-con connection portion that is furthest from the motor in the width direction.

2. The Y capacitor comprises a P-side Y capacitor busbar connecting the P-side capacitor element and the P-side Y capacitor connection, and an N-side Y capacitor busbar connecting the N-side capacitor element and the N-side Y capacitor connection. The first portion is provided with a connection portion between the P-side capacitor element and the P-side Y capacitor busbar. The electrical component according to claim 1, wherein the second portion is provided with a connection portion between the N-side capacitor element and the N-side Y-capacitor busbar.

3. The P-side Y-connector and the N-side Y-connector have an elongated length in the depth direction (DP) which is different from the thickness direction and the width direction. In the first portion, at least a part of the P-side Y capacitor busbar extends in the depth direction along the P-side Y capacitor connection portion, The electrical component according to claim 2, wherein in the second portion, at least a portion of the N-side Y capacitor busbar extends in the depth direction along the N-side Y capacitor connection portion.

4. The enclosure is electrically connected to ground. The Y capacitor further comprises a GND busbar (50) connecting the P-side capacitor element and the N-side capacitor element to the housing. The P-side capacitor element has a P-side first element terminal (31A) connected to the P-side Y capacitor busbar and a P-side second element terminal (31B) connected to the GND busbar. The N-side capacitor element has an N-side first element terminal (32A) connected to the N-side Y capacitor busbar and an N-side second element terminal (32B) connected to the GND busbar. The first element terminal on the P side and the second element terminal on the P side are arranged in the depth direction, The N-side first element terminal and the N-side second element terminal are arranged in the depth direction, The first fastening member (71) that fastens the GND busbar and the housing, the P-side capacitor element, and the second fastening member (72) that fastens the P-side Y capacitor busbar and the P-side Y capacitor connection part are arranged in the order of the first fastening member, the P-side capacitor element, and the second fastening member with respect to the depth direction. The electrical component according to claim 3, wherein the first fastening member, the N-side capacitor element, and the third fastening member (73) that fastens the N-side Y capacitor busbar and the N-side Y capacitor connection portion are arranged in the order of the first fastening member, the N-side capacitor element, and the third fastening member with respect to the depth direction.

5. The support base further includes an adhesive (64) for fixing the bottoms of the P-side capacitor element and the N-side capacitor element. The electrical component according to claim 4, wherein the portions of the P-side capacitor element and the N-side capacitor element, excluding the bottom portion, are exposed from the adhesive.

6. The support base has a capacitor support portion (63) that supports the P-side capacitor element and the N-side capacitor element, a first support portion (61) that supports the GND busbar, and a second support portion (62) that supports the P-side Y capacitor busbar and the P-side Y capacitor connection portion, as well as the N-side Y capacitor busbar and the N-side Y capacitor connection portion. The electrical component according to claim 5, wherein the first support portion, the capacitor support portion, and the second support portion are connected by the same material in the depth direction.

7. With respect to the thickness direction, the P-side Y-con connection portion overlaps with a part of the P-side capacitor element. The electrical component according to any one of claims 1 to 6, wherein, with respect to the thickness direction, the N-side Y-con connection portion overlaps with a part of the N-side capacitor element.

8. With respect to the thickness direction, the P-side Y-con connection portion does not overlap with the P-side capacitor element. The electrical component according to any one of claims 1 to 6, wherein, with respect to the thickness direction, the N-side Y-con connection portion does not overlap with the N-side capacitor element.

9. The first portion is provided with the P-side capacitor element, the P-side Y capacitor busbar, and a first connection portion between the P-side capacitor element and the P-side Y capacitor busbar. The second portion is provided with the N-side capacitor element, the N-side Y capacitor busbar, and a second connection portion between the N-side capacitor element and the N-side Y capacitor busbar. The electrical component according to claim 2, wherein, with respect to the width direction, the first connection portion, the second connection portion, the P-side Y-connector connection portion, and the N-side Y-connector connection portion are arranged in the order of the first connection portion, the P-side Y-connector connection portion, the second connection portion, and the N-side Y-connector connection portion.

10. The Y capacitor further comprises a GND busbar (50) connecting the P-side capacitor element and the N-side capacitor element to the housing. The electrical component according to claim 9, wherein the GND busbar is connected to the housing between the P-side capacitor element and the N-side capacitor element with respect to the width direction.

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