Power converter and Y-capacitor

Abstract

To provide a power conversion device and a Y capacitor that fully demonstrate noise reduction performance.SOLUTION: A Y capacitor includes a P-side Y capacitor element 31, an N-side Y capacitor element 32, and a GND bus bar 50. The P-side Y capacitor element 31 includes a first terminal 31A electrically connected to an inverter and a second terminal 31B electrically connected to a case. The N-side Y capacitor element 32 includes a third terminal 32A electrically connected to the inverter and a fourth terminal 32B electrically connected to the case. The GND bus bar 50 is connected to the second terminal, the fourth terminal, and the case, and connects the P-side Y capacitor element and the N-side Y capacitor element to the ground. The P-side Y capacitor element and the N-side Y capacitor element do not face each other in the first direction DP in which the first terminal and the second terminal are aligned or in the second direction WD in which the third terminal and the fourth terminal are aligned.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The disclosure described in this specification relates to a power conversion device and a Y capacitor.

Background Art

[0002] Patent Document 1 discloses a power conversion device having a switching element and two Y capacitors that reduce the noise current generated in the switching element.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In Patent Document 1, two Y capacitors are arranged so as to face each other. The mutual inductance between the two Y capacitors is large. Therefore, for example, an induced voltage is likely to occur that causes a noise current in the opposite direction to the noise current flowing through one Y capacitor to flow through the other Y capacitor due to the magnetic field generated around the noise current flowing through one Y capacitor. There is a concern that the induced voltage may inhibit the flow of the noise current to the other Y capacitor. In such an arrangement, there is a possibility that the noise reduction performance of the Y capacitor may not be fully exhibited.

[0005] An object of the present disclosure is to provide a power conversion device and a Y capacitor in which the noise reduction performance is fully exhibited.

Means for Solving the Problems

[0006] A power conversion device according to an aspect of the present disclosure is an inverter that converts the power supplied from a battery, A Y-capacitor that removes noise generated by the inverter, It has an inverter and a case that houses a Y capacitor, The Y capacitor is A P-side Y capacitor element having a first terminal electrically connected to the inverter and a second terminal electrically connected to the case, An N-side Y capacitor element having a third terminal electrically connected to the inverter and a fourth terminal electrically connected to the case, It comprises a second terminal, a fourth terminal, and a GND busbar connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. With respect to the first direction where the first and second terminals are aligned, or the second direction where the third and fourth terminals are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. The first and second directions are orthogonal. A power conversion device according to one aspect of this disclosure is: An inverter that converts the power supplied from the battery, A Y-capacitor that removes noise generated by the inverter, It has an inverter and a case that houses a Y capacitor, The Y capacitor is A P-side Y capacitor element having a first terminal electrically connected to the inverter and a second terminal electrically connected to the case, An N-side Y capacitor element having a third terminal electrically connected to the inverter and a fourth terminal electrically connected to the case, It comprises a second terminal, a fourth terminal, and a GND busbar connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. With respect to the first direction where the first and second terminals are aligned, or the second direction where the third and fourth terminals are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. 1st direction in The region overlapping the P-side Y capacitor element, and the second direction inAt least a part of a GND connection member that connects the GND bus bar and the case is provided in a first overlapping region where a region overlapping with the N-side Y capacitor element overlaps.

[0007] A power conversion device according to an aspect of the present disclosure an inverter that converts power supplied from a battery; a Y capacitor that removes noise generated in the inverter; has an inverter and a case that houses the inverter and the Y capacitor, The Y capacitor has a P-side Y capacitor element having a first terminal electrically connected to the inverter and a second terminal electrically connected to the case, and an N-side Y capacitor element having a third terminal electrically connected to the inverter and a fourth terminal electrically connected to the case, and is provided with a GND bus bar that is connected to the second terminal, the fourth terminal, and the case and connects the P-side Y capacitor element and the N-side Y capacitor element to ground, The P-side Y capacitor element and the N-side Y capacitor element are non-opposed with respect to a first direction in which the first terminal and the second terminal are aligned or a second direction in which the third terminal and the fourth terminal are aligned. the law of nature, The first and second directions are orthogonal. A power conversion device according to one aspect of this disclosure is: An inverter that converts the power supplied from the battery, A Y-capacitor that removes noise generated by the inverter, It has an inverter and a case that houses a Y capacitor, The Y capacitor is A P-side Y capacitor element having a first terminal electrically connected to the inverter and a second terminal electrically connected to the case, An N-side Y capacitor element having a third terminal electrically connected to the inverter and a fourth terminal electrically connected to the case, It comprises a second terminal, a fourth terminal, and a GND busbar connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. With respect to the first direction where the first and second terminals are aligned, or the second direction where the third and fourth terminals are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. At least a portion of the GND connection member connecting the GND busbar and the case is provided in the first overlapping region where the region overlapping the P-side Y capacitor element in the first direction and the region overlapping the N-side Y capacitor element in the second direction overlap.

[0008] A Y capacitor according to an aspect of the present disclosure is a Y capacitor that removes noise generated in the inverter, A P-side Y capacitor element having a first terminal electrically connected to an inverter and a second terminal electrically connected to ground, An N-side Y capacitor element having a third terminal electrically connected to an inverter and a fourth terminal electrically connected to ground, A GND bus bar electrically connecting the second terminal, the fourth terminal, and ground, and with respect to a first direction in which the first terminal and the second terminal are aligned or a second direction in which the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are non-opposing, The first direction and the second direction are orthogonal. A Y capacitor according to an aspect of the present disclosure, is a Y capacitor housed in a case together with an inverter and removing noise generated by the inverter, and A P-side Y capacitor element having a first terminal electrically connected to an inverter and a second terminal electrically connected to ground, An N-side Y capacitor element having a third terminal electrically connected to an inverter and a fourth terminal electrically connected to ground, A GND bus bar electrically connecting the second terminal, the fourth terminal, and ground, and with respect to a first direction in which the first terminal and the second terminal are aligned or a second direction in which the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are non-opposing, The first direction in An area overlapping the P-side Y capacitor element and the second direction in An area overlapping the N-side Y capacitor element, at least a part of a GND connection member connecting the GND bus bar and the case is provided in a first overlapping area where they overlap.

[0009] A Y capacitor according to an aspect of the present disclosure, is a Y capacitor removing noise generated by an inverter, and A P-side Y capacitor element having a first terminal electrically connected to an inverter and a second terminal electrically connected to ground, An N-side Y capacitor element having a third terminal electrically connected to an inverter and a fourth terminal electrically connected to ground, It comprises a second terminal, a fourth terminal, and a GND busbar for electrically connecting to ground, With respect to the first direction in which the first and second terminals are aligned, or the second direction in which the third and fourth terminals are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. the law of nature, The first and second directions are orthogonal. A Y capacitor according to one aspect of this disclosure is A Y capacitor housed in a case together with the inverter, which removes noise generated by the inverter, A P-side Y capacitor element having a first terminal electrically connected to the inverter and a second terminal electrically connected to ground, An N-side Y capacitor element having a third terminal electrically connected to an inverter and a fourth terminal electrically connected to ground, It comprises a second terminal, a fourth terminal, and a GND busbar for electrically connecting to ground, With respect to the first direction where the first and second terminals are aligned, or the second direction where the third and fourth terminals are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. At least a portion of the GND connection member connecting the GND busbar and the case is provided in the first overlapping region where the region overlapping the P-side Y capacitor element in the first direction and the region overlapping the N-side Y capacitor element in the second direction overlap.

[0010] 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]

[0011] [Figure 1] This is an electrical circuit diagram of a power conversion device. [Figure 2] This is a plan view of the power conversion device as seen from the first storage space. [Figure 3] This is a plan view of the power conversion device, excluding the Y capacitor, as seen from the second storage space. [Figure 4] This is a cross-sectional view of a power converter. [Figure 5] This is an exploded perspective view illustrating the placement of the Y capacitor in the second storage space. [Figure 6] This is a perspective view illustrating the placement of the Y capacitor in the second storage space. [Figure 7] This is a perspective view of a Y-capacitor. [Figure 8] This is a cross-sectional view of the Y capacitor along the line VIII-VIII shown in Figure 7. [Figure 9] This is a plan view of the Y capacitor, excluding the Y capacitor case and covering resin, as seen from the exposed surface 36A side. [Figure 10] This is a plan view illustrating the placement of the Y capacitor in the case. [Modes for carrying out the invention]

[0012] The following describes several embodiments for implementing this disclosure with reference to the drawings. In each embodiment, parts corresponding to matters described in a preceding embodiment may be denoted by the same reference numerals, and redundant explanations may be omitted. If only a part of the configuration is described in each embodiment, other embodiments described in a preceding embodiment may be applied to the remaining parts of the configuration.

[0013] Furthermore, not only are combinations of parts explicitly shown as being combinable in each embodiment possible, but it is also possible to partially combine embodiments with each other, embodiments with modified versions, and modified versions with each other, even if not explicitly shown, as long as there are no particular problems with the combination.

[0014] (First Embodiment) <In-vehicle systems> Figure 1 is an electrical circuit diagram of the power converter 10 installed in the in-vehicle system 1. The in-vehicle system 1 is equipped with a high-voltage battery 2, a low-voltage battery 3, a motor generator 4, a control device 5, and the power converter 10. The vehicle on which the in-vehicle system 1 is installed is a hybrid vehicle capable of driving by switching between and / or combining the driving force of the engine and the driving force of the motor generator 4.

[0015] The power converter 10 includes high-voltage wiring 10A, 10B, an inverter 11, a control circuit board 15, a smoothing capacitor 20, a Y capacitor 30, a high-voltage connector 81, and a low-voltage connector 91. High-voltage wiring 10A is the wiring connected to the positive terminal of the high-voltage battery 2. High-voltage wiring 10A may be referred to as P-side high-voltage wiring 10A or the first high-voltage wiring. High-voltage wiring 10B is the wiring connected to the negative terminal of the high-voltage battery 2. High-voltage wiring 10B may be referred to as N-side high-voltage wiring 10B or the second high-voltage wiring.

[0016] 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.

[0017] The P-side input terminal 11A, which is connected to the high-voltage battery 2, is connected to the collector electrode of one of the two switching elements 13, which is located on the P side. The N-side input terminal 11B, which is connected to the high-voltage battery 2, is connected to the emitter of one of the two switching elements 13, which is located on the N 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.

[0018] Motor terminals 11C, which are connected to the motor generator 4, are connected to the emitter of the P-side 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.

[0019] The control circuit board 15 controls the on / off state of multiple switching elements 13 using operating power supplied from the low-voltage battery 3. 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 multiple switching elements 13 are soldered to the control circuit board 15. The connection terminals 11D of multiple switching elements 13 are electrically connected to the control circuit.

[0020] 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.

[0021] The Y capacitor 30 primarily removes noise current generated from the inverter 11. The Y capacitor 30 has two Y capacitor elements 31 and 32, two Y capacitor busbars 41 and 42, and a GND busbar 50. The two Y capacitor elements 31 and 32 are connected in series to the P-side high-voltage wiring 10A and the N-side high-voltage wiring 10B via the two Y capacitor busbars 41 and 42.

[0022] Note that one of the two Y-capacitor elements 31 and 32, located on the P-side high-voltage wiring 10A side, may be referred to as the P-side Y-capacitor element 31. One of the two Y-capacitor busbars 41 and 42, connected to the P-side Y-capacitor element 31, may be referred to as the P-side Y-capacitor busbar 41, or the P-side capacitor wiring. The P-side Y-capacitor busbar 41 has a P-side first busbar terminal 41A connected to the P-side Y-capacitor element 31 and a P-side second busbar terminal 41B connected to the P-side high-voltage wiring 10A. The P-side Y-capacitor busbar 41 extends to connect the P-side first busbar terminal 41A and the P-side second busbar terminal 41B. The P-side Y-capacitor element 31 is electrically connected to the P-side high-voltage wiring 10A via the P-side Y-capacitor busbar 41.

[0023] Similarly, one of the two Y-capacitor elements 31 and 32, located on the N-side high-voltage wiring 10B, may be referred to as the N-side Y-capacitor element 32. One of the two Y-capacitor busbars 41 and 42, connected to the N-side Y-capacitor element 32, may be referred to as the N-side Y-capacitor busbar 42, or the N-side Y-capacitor wiring. The N-side Y-capacitor busbar 42 has an N-side first busbar terminal 42A connected to the N-side Y-capacitor element 32 and an N-side second busbar terminal 42B connected to the N-side high-voltage wiring 10B. The N-side Y-capacitor busbar 42 extends to connect the N-side first busbar terminal 42A and the N-side second busbar terminal 42B. The N-side Y-capacitor element 32 is electrically connected to the N-side high-voltage wiring 10B via the N-side Y-capacitor busbar 42.

[0024] The GND busbar 50 has a P-side GND terminal 51 connected to the P-side Y capacitor element 31, an N-side GND terminal 52 connected to the N-side Y capacitor element 32, and a case connection terminal 54 connected to the case 130. The GND busbar 50 extends to connect the P-side GND terminal 51, the N-side GND terminal 52, and the case connection terminal 54. It can also be said that the GND busbar 50 has the P-side GND terminal 51, the N-side GND terminal 52, and an extension 53 connecting the P-side GND terminal 51 and the N-side GND terminal 52. It can also be said that the extension 53 has the case connection terminal 54.

[0025] The P-side Y capacitor element 31 and the N-side Y capacitor element 32 are electrically and thermally connected via a GND busbar 50. The GND busbar 50 is connected to the Y capacitor elements 31 and 32, and is also electrically and thermally connected to the case 130.

[0026] The GND busbar 50 is electrically connected to the body ground of the chassis, etc., via the case 130. The Y capacitor elements 31 and 32 remove noise current generated in the inverter 11 by directing it to the body ground via the GND busbar 50 and the case 130. In addition, the Y capacitor elements 31 and 32 can remove noise current not only generated in the inverter 11 but also flowing through the high-voltage wiring 10A and 10B.

[0027] The high-voltage connector 81 is a power supply port from which high-voltage power is supplied from the high-voltage battery 2. High-voltage wiring 10A and 10B, and Y-capacitor busbars 41 and 42 are electrically connected to the high-voltage connector 81. High-voltage power is supplied from the high-voltage battery 2 to the inverter 11, smoothing capacitor 20, and Y-capacitor 30 via the high-voltage connector 81. In addition to the high-voltage battery 2, a signal wiring 84 that transmits an interlock signal is also connected to the high-voltage connector 81. One end of the signal wiring 84 is connected to the high-voltage connector 81, and the other end is connected to the control circuit board 15. Note that high-voltage wiring 10A and 10B may be referred to as the first wiring. Y-capacitor busbars 41 and 42 may be referred to as the second wiring.

[0028] The low-voltage connector 91 is a supply port where low-voltage power is supplied from the low-voltage battery 3. The control circuit board 15 is electrically connected to the low-voltage connector 91. Low-voltage power is supplied from the low-voltage battery 3 to the control circuit board 15 via the low-voltage connector 91. In addition to the low-voltage battery 3, the control device 5, for example, which acts as a higher-level ECU, is also electrically connected to the low-voltage connector 91. The control circuit mounted on the control circuit board 15 works in cooperation with the control device 5 to control the inverter 11 and auxiliary equipment included in the vehicle.

[0029] <Mechanical configuration of a power converter> Before explaining the mechanical configuration of the power converter 10, the drawings will be described first. Figure 2 is a plan view of the power converter 10 as seen from the first storage space 141 side. Figure 3 is a view as seen from the second storage space 142 side. Excluding Y capacitor 30This is a plan view of the power converter 10. Figure 4 is, Power converter 10 This is a cross-sectional view. Figure 5 is an exploded perspective view illustrating the placement of the Y capacitor 30 in the second storage space 142. Figure 6 is a perspective view illustrating the placement of the Y capacitor 30 in the second storage space 142. Figure 7 is a perspective view of the Y capacitor 30. Figure 8 is a cross-sectional view of the Y capacitor 30 along the line VIII-VIII shown in Figure 7. Figure 9 is a plan view of the Y capacitor 30 as seen from the exposed surface 36A side. Figure 10 is a plan view illustrating the placement of the Y capacitor 30 in the case 130.

[0030] In this embodiment, as an example, in Figure 2, of the two high-voltage wires 10A and 10B that overlap the power module 120, one provided on the first opening 131B side is described as the P-side high-voltage wire 10A, and the other provided on the second opening 131C side is described as the N-side high-voltage wire 10B. However, the P-side high-voltage wire 10A and the N-side high-voltage wire 10B are not limited to these. Of the two high-voltage wires 10A and 10B, one provided on the first opening 131B side may be considered as the N-side high-voltage wire 10B, and the other provided on the second opening 131C side may be considered as the P-side high-voltage wire 10A. The configuration described below is merely an example of this embodiment.

[0031] In addition to the components described above, the power converter 10 includes a P-side connecting member 100A, an N-side connecting member 100B, a GND connecting member 100C, solder 102, a cooler 110, and a case 130. The P-side connecting member 100A, N-side connecting member 100B, GND connecting member 100C, and solder 102 will be described as appropriate in the following description. The power module 120 is composed of a plurality of semiconductor modules 12 and a cooler 110. The cooler 110 has a stacked cooling structure. The cooler 110 includes a supply pipe 111, a discharge pipe 113, and a plurality of intermediate pipes 112. The plurality of intermediate pipes 112 are arranged in a ladder-like fashion between the supply pipe 111 and the discharge pipe 113. The supply pipe 111 and the discharge pipe 113 are connected via the intermediate pipes 112 in a manner that allows refrigerant to flow.

[0032] The semiconductor modules 12 are individually housed between adjacent relay tubes 112. The semiconductor modules 12 are sandwiched between adjacent relay tubes 112. The power module 120 is formed by housing the semiconductor modules 12 in the cooler 110. The heat from the semiconductor modules 12 is efficiently dissipated to the relay tubes 112. The cooler 110 is also fixed to the case 130. The temperature of the cooler 110 is low because a coolant flows inside it. The temperature of the case 130 is also low because it is fixed to the cooler 110.

[0033] <Case> Case 130 forms a container. Case 130 is made of a metal material. For example, Case 130 is made of die-cast aluminum. Case 130 comprises a frame 131 and a partition wall 136. The frame 131 extends in one direction and forms an annular enclosed shape with respect to an axis along that direction. The frame 131 has two ends that are separated in one direction. One end of the frame 131 forms a first opening 131B that opens in one direction. The other end of the frame 131 forms a second opening 131C that opens in the width direction. As an example, the first opening 131B is located lower in the direction of gravity than the second opening 131C.

[0034] The partition wall 136 is installed inside the frame 131 and divides the storage space 140 inside the frame 131 into two. The partition wall 136 is sometimes referred to as the inner wall. The partition wall 136 has a flat shape with a thin thickness in one direction. The partition wall 136 has a surface 136A and a back surface 136B that are aligned in one direction. Surface 136A is located on the side of the second opening 131C. Back surface 136B is located on the side of the first opening 131B.

[0035] One direction is sometimes referred to as the thickness direction TD because it coincides with the thickness direction of the partition wall 136. The depth direction perpendicular to the thickness direction TD is sometimes referred to as the depth direction DP, or the first direction. The width direction perpendicular to the thickness direction TD and the depth direction DP is sometimes referred to as the width direction WD, or the second direction. The direction perpendicular to the thickness direction TD is sometimes referred to as the planar direction. The planar direction is the direction along the width direction WD and the depth direction DP.

[0036] The frame 131 has two walls spaced apart in the width direction WD and two walls spaced apart in the depth direction DP. Specifically, the frame 131 comprises a first wall section 132 and a third wall section 134 spaced apart in the width direction WD, and a second wall section 133 and a fourth wall section 135 spaced apart in the depth direction DP. The first to fourth wall sections 132 to 135 are arranged in a clockwise direction. The first to fourth wall sections 132 to 135 are integrally connected to form the frame 131.

[0037] A partition wall 136 is provided on the inner surface 131A of the frame 131, dividing the storage space 140 in the thickness direction TD. The partition wall 136 divides the storage space 140 into a first storage space 141 and a second storage space 142. The first storage space 141 is divided by the part of the frame 131 on the side of the first opening 131B and the back surface 136B of the partition wall 136. The second storage space 142 is divided by the part of the frame 131 on the side of the second opening 131C and the surface surface 136A of the partition wall 136.

[0038] The partition wall 136 is provided with a through hole 137 for passing connection terminals 11D extending from the semiconductor module 12, and a wiring hole 138 for passing signal wiring 84. In addition to passing signal wiring 84, the wiring hole 138 also serves to pass tools for mechanically connecting electrical components housed in the first storage space 141 and electrical components housed in the second storage space 142. The through hole 137 and the wiring hole 138 are holes that penetrate the partition wall 136 in the thickness direction TD. As an example, the through hole 137 is provided approximately in the center of the width direction WD in the partition wall 136. The wiring hole 138 is provided on the third wall portion 134 side of the through hole 137.

[0039] The first storage space 141 houses high-voltage wiring 10A, 10B, a smoothing capacitor 20, and a power module 120. The connection terminal 11D of the semiconductor module 12 extends from the through-hole 137 to the second storage space 142. The second storage space 142 houses a control circuit board 15 and a Y capacitor 30. The control circuit board 15 is mounted on the partition wall 136 so that a portion of it overlaps with the through-hole 137. The first storage space 141 is sometimes referred to as the high-voltage area because it houses high-voltage components supplied with high-voltage power from the high-voltage battery 2. The second storage space 142 is sometimes referred to as the low-voltage area because it houses low-voltage components supplied with low-voltage power from the low-voltage battery 3.

[0040] The Y capacitor 30 is installed in the second storage space 142 such that the Y capacitor busbars 41 and 42 pass through the wiring hole 138. The Y capacitor 30 is mounted next to the wiring hole 138 in the partition wall 136 such that the Y capacitor busbars 41 and 42 pass through the wiring hole 138. The P-side Y capacitor element 31 and the N-side Y capacitor element 32 are housed in the second storage space 142. The Y capacitor busbars 41 and 42 extend from the second storage space 142 to the first storage space 141 through the wiring hole 138.

[0041] Furthermore, a base portion 139 to which a GND busbar 50 is fastened is provided near the wiring hole 138 in the partition wall 136. The base portion 139 is adjacent to the wiring hole 138 in the width direction WD. The base portion 139 is adjacent to the second wall portion 133. The base portion 139 is a projection that protrudes from the surface 136A of the partition wall 136. A hole is formed at the tip of the projection to which the shaft portion of a bolt can be fastened. The base portion 139 is provided on the partition wall 136 so as to be adjacent to the second wall portion 133. The hole 54A of the case connection terminal 54 is fastened to the base portion 139 via the GND connection member 100C, thereby electrically connecting the Y capacitor elements 31 and 32 to the partition wall 136. The partition wall 136 and the frame 131 are electrically connected. The Y capacitor elements 31 and 32 electrically connected to the base portion 139 are electrically connected to the body ground of the chassis, etc., via the partition wall 136 and the frame 131.

[0042] Furthermore, a power module 120 is provided approximately in the center of the width direction WD in the first storage space 141. The power module 120 is located on the fourth wall 135 side in the depth direction DP. A smoothing capacitor 20 is provided on the first wall 132 side in the width direction WD from the power module 120. The smoothing capacitor 20 is provided extending from the second wall 133 to the fourth wall 135 in the depth direction DP. A high-voltage connector 81 is also provided on the third wall 134. The high-voltage connector 81 is located on the second wall 133 side in the depth direction DP from the power module 120.

[0043] The high-voltage connector 81 has a supply section 82 and a power distribution section 83. The supply section 82 is the part that receives high-voltage power from the high-voltage battery 2. The power distribution section 83 is the part that distributes power to the high-voltage wiring 10A, 10B and the Y capacitor busbars 41, 42.

[0044] In some cases, the part of the power distribution unit 83 connected to the P-side high-voltage wiring 10A and the P-side Y-capacitor bus bar 41 may be referred to as the P-side power distribution unit 83A. In some cases, the part of the power distribution unit 83 connected to the N-side high-voltage wiring 10B and the N-side Y-capacitor bus bar 42 may be referred to as the N-side power distribution unit 83B. The P-side high-voltage wiring 10A, the P-side Y-capacitor bus bar 41, and the P-side power distribution unit 83A are electrically and mechanically fastened via the P-side connection member 100A. The N-side high-voltage wiring 10B, the N-side Y-capacitor bus bar 42, and the N-side power distribution unit 83B are electrically and mechanically fastened via the N-side connection member 100B. Note that the P-side connection member 100A may be referred to as the first connection member. The N-side connection member 100B may be referred to as the second connection member.

[0045] Also, the above-described wiring hole 138 is formed in the partition wall 136 so as to be adjacent to the part of the third wall portion 134 where the high-voltage connector 81 is provided. The Y-capacitor 30 is provided in the second storage space 142 so as to cover the wiring hole 138. The Y-capacitor 30 is attached to the side of the wiring hole 138 in the partition wall 136 such that the Y-capacitor bus bars 41 and 42 pass through the wiring hole 138. The P-side connection member 100A and the N-side connection member 100B are provided at positions overlapping in the thickness direction TD with the wiring hole 138.

[0046] <Mechanical Structure of Y-Capacitor> In addition to the components described so far, the Y-capacitor 30 further includes a Y-capacitor case 33 and a coating resin 36. The Y-capacitor case 33 holds and houses the Y-capacitor elements 31 and 32, the Y-capacitor bus bars 41 and 42, and the GND bus bar 50. The Y-capacitor case 33 includes two element storage portions 34 that individually house the Y-capacitor elements 31 and 32, and a connecting portion 35 that holds the GND bus bar 50.

[0047] Each of the two element housing sections 34 has a closed-bottom box shape, opening at one end in the thickness direction TD. The two element housing sections 34 are connected via a connecting section 35. The connecting section 35 has a flat shape extending in the planar direction. The connecting section 35 is provided with a hole 35A that penetrates in the thickness direction TD. A GND bus bar 50 is provided in the connecting section 35 such that hole 54A overlaps with hole 35A. The Y capacitor 30 is further provided in the second housing space 142 such that holes 54A and 35A and the hole in the base section 139 overlap in the thickness direction TD. A GND connection member 100C is passed through the hole where the three holes overlap. The Y capacitor 30 is electrically and mechanically connected to the base section 139 by the GND connection member 100C. The Y capacitor 30 is fastened to the base section 139 so as to cover the wiring hole 138.

[0048] The element housing section 34 in which the P-side Y capacitor element 31 is housed may be referred to as the P-type element housing section 34A or the first housing section. The element housing section 34 in which the N-side Y capacitor element 32 is housed may be referred to as the N-type element housing section 34B or the second housing section. The connecting section 35 is provided to connect the wall section provided on the inside in the planar direction in the P-type element housing section 34A and the wall section provided on the inside in the planar direction in the N-type element housing section 34B. A hole 35A is provided at the corner where the two wall sections of the connecting section 35 connect.

[0049] The opening of the P-type element housing section 34A has a roughly L-shape, extending in the width direction WD and the depth direction DP when viewed from the thickness direction TD plane. A portion of the L-shape of the P-type element housing section 34A is adjacent to the hole 35A. The P-type element housing section 34A extends in the depth direction along the edge of the wiring hole 138 so as to move away from the hole 35A, and also extends in the width direction toward the wiring hole 138 from the end away from the hole 35A. The P-side Y capacitor element 31 is housed in the portion of the P-type element housing section 34A that extends in the depth direction DP.

[0050] The P-side Y capacitor element 31 has a P-side first element terminal 31A connected to the P-side first busbar terminal 41A and a P-side second element terminal 31B connected to the P-side GND terminal 51. The P-side first element terminal 31A and the P-side second element terminal 31B extend in the thickness direction TD so as to be away from the P-side Y capacitor element 31. The P-side Y capacitor element 31 is housed in a portion of the P-type element housing 34A that extends in the depth direction DP so that the P-side first element terminal 31A and the P-side second element terminal 31B are aligned in the depth direction DP. The P-side second element terminal 31B is located closer to the GND connection member 100C than the P-side first element terminal 31A. In other words, the P-side first element terminal 31A is located further away from the GND connection member 100C than the P-side second element terminal 31B. The P-side first element terminal 31A is sometimes referred to as the first terminal. The P-side second element terminal 31B is sometimes referred to as the second terminal.

[0051] The P-type element housing section 34A houses the P-side Y capacitor element 31, a portion of the P-side Y capacitor busbar 41, and a portion of the GND busbar 50. The P-side Y capacitor element 31, a portion of the P-side Y capacitor busbar 41, and a portion of the GND busbar 50 are covered by a covering resin 36. The P-side first element terminal 31A, the P-side second element terminal 31B, the P-side first busbar terminal 41A, the P-side second busbar terminal 41B, and the P-side GND terminal 51 are exposed from the exposed surface 36A of the covering resin 36.

[0052] The first P-side element terminal 31A and the first P-side busbar terminal 41A, both exposed from the exposed surface 36A, are connected via solder 102. The second P-side element terminal 31B and the P-side GND terminal 51, both exposed from the exposed surface 36A, are connected via solder 102.

[0053] The P-side Y capacitor busbar 41 has a main portion 41C that connects the P-side first busbar terminal 41A and the P-side second busbar terminal 41B. The main portion 41C has a portion that extends in the planar direction inside the P-type element housing 34A and a portion that extends in the thickness direction TD. The main portion 41C has two portions that extend in the thickness direction TD. One portion that extends in the thickness direction TD is provided at each end of the portion that extends in the planar direction inside the P-type element housing 34A. The P-side first busbar terminal 41A is provided at one end of the portion that extends in the thickness direction TD. The P-side second busbar terminal 41B is provided at the other end of the portion that extends in the thickness direction TD. The P-side second busbar terminal 41B and the P-side high-voltage wiring 10A are fastened together via the P-side connecting member 100A.

[0054] The P-side Y capacitor busbar 41 is connected to the P-side first element terminal 31A via solder 102 on the outside of the covering resin 36. The P-side Y capacitor busbar 41 is arranged so that it is covered by the covering resin 36 in the process of extending from the connection point with the P-side first element terminal 31A toward the connection point with the P-side high voltage wiring 10A. In addition, a positioning base 38 is formed on the wall of the P-type element housing section 34A that is away from the GND connection member 100C, extending away from the GND connection member 100C. A positioning part 39 protrudes from the positioning base 38 toward the partition wall 136. In the Y capacitor case 33, the length of the depth direction DP is from the end of the positioning part 39 furthest from the hole 35A.

[0055] The opening of the N-type element housing section 34B is roughly rectangular in shape, extending in the width direction WD when viewed from the thickness direction TD. A portion of the rectangle of the N-type element housing section 34B is adjacent to the hole 35A. The N-type element housing section 34B extends in the width direction along the edge of the wiring hole 138 so as to move away from the hole 35A. The N-side Y capacitor element 32 is housed in the N-type element housing section 34B.

[0056] The N-side Y capacitor element 32 has an N-side first element terminal 32A connected to the N-side first busbar terminal 42A and an N-side second element terminal 32B connected to the N-side GND terminal 52. The N-side first element terminal 32A and the N-side second element terminal 32B extend in the thickness direction TD so as to be away from the N-side Y capacitor element 32. The N-side Y capacitor element 32 is housed in the N-type element housing section 34B such that the N-side first element terminal 32A and the N-side second element terminal 32B are aligned in the width direction WD. The N-side second element terminal 32B is located closer to the GND connection member 100C than the N-side first element terminal 32A. In other words, the N-side first element terminal 32A is located further away from the GND connection member 100C than the N-side second element terminal 32B. The N-side first element terminal 32A is sometimes referred to as the third terminal. The N-side second element terminal 32B is sometimes referred to as the fourth terminal.

[0057] The N-type element housing section 34B is provided with an N-side Y capacitor element 32, a portion of the N-side Y capacitor busbar 42, and a portion of the GND busbar 50. The N-side Y capacitor element 32, a portion of the N-side Y capacitor busbar 42, and a portion of the GND busbar 50 are covered with a covering resin 36. The N-side first element terminal 32A, the N-side second element terminal 32B, the N-side first busbar terminal 42A, the N-side second busbar terminal 42B, and the N-side GND terminal 52 are exposed from the exposed surface 36A of the covering resin 36.

[0058] The N-side first element terminal 32A and the N-side first busbar terminal 42A, both exposed from the exposed surface 36A, are connected via solder 102. The N-side second element terminal 32B and the N-side GND terminal 52, both exposed from the exposed surface 36A, are connected via solder 102.

[0059] The N-side Y capacitor busbar 42 has a main section that connects the N-side first busbar terminal 42A and the N-side second busbar terminal 42B. A detailed description of the N-side Y capacitor busbar 42 is omitted. The N-side Y capacitor busbar 42 is connected to the N-side first element terminal 32A via solder 102 outside the covering resin 36. The N-side Y capacitor busbar 42 is arranged so that it is covered by the covering resin 36 in the process of extending from the connection point with the N-side first element terminal 32A toward the connection point with the N-side high-voltage wiring 10B. In the Y capacitor case 33, the long side of the width WD is from the hole 35A to the end of the N-type element housing section 34B, which is furthest away.

[0060] As described above, the P-side Y capacitor element 31 is provided in the P-type element housing 34A such that the P-side first element terminal 31A and the P-side second element terminal 31B are aligned in the depth direction DP. The N-side Y capacitor element 32 is provided in the N-type element housing 34B such that the N-side first element terminal 32A and the N-side second element terminal 32B are aligned in the width direction WD. The arrangement of the N-side Y capacitor element 32 is equivalent to the arrangement obtained by rotating the P-side Y capacitor element 31 by 90 degrees around the hole 35A. In other words, the arrangement of the P-side Y capacitor element 31 is equivalent to the arrangement obtained by rotating the N-side Y capacitor element 32 by 90 degrees around the hole 35A.

[0061] The P-side Y capacitor element 31 and the N-side Y capacitor element 32 are not facing each other in both the width direction WD and the depth direction DP. The P-side Y capacitor element 31 and the N-side Y capacitor element 32 are not overlapping in both the width direction WD and the depth direction DP. Current flows through the P-side Y capacitor element 31 from the P-side first element terminal 31A toward the P-side second element terminal 31B. The current flows through the P-side Y capacitor element 31 in the depth direction DP. A magnetic field is generated in the P-side Y capacitor element 31 in the radial direction with the depth direction DP as the central axis. Current flows through the N-side Y capacitor element 32 from the N-side first element terminal 32A toward the N-side second element terminal 32B. The current flows through the N-side Y capacitor element 32 in the width direction WD.

[0062] The direction in which current mainly flows through the P-side Y capacitor element 31 and the direction in which current mainly flows through the N-side Y capacitor element 32 are orthogonal. The mutual inductance between the P-side Y capacitor element 31 and the N-side Y capacitor element 32 is small. The generation of an induced voltage in the N-side Y capacitor element 32 due to the magnetic field generated in the P-side Y capacitor element 31 is easily suppressed. The generation of an induced voltage in the P-side Y capacitor element 31 due to the magnetic field generated in the N-side Y capacitor element 32 is also easily suppressed. In this embodiment, a configuration in which the direction in which current mainly flows through the P-side Y capacitor element 31 and the direction in which current mainly flows through the N-side Y capacitor element 32 are orthogonal has been described, but the directions of the two are not limited to orthogonal.

[0063] <Arrangement of connecting members> As described above, the Y capacitor 30 is provided in the second storage space 142 so as to cover the wiring hole 138. An extension 53 is provided on the connecting portion 35 such that hole 54A overlaps with hole 35A. The extension 53 extends along the connecting portion 35. The extension 53 has a case connection terminal 54. A hole 54A is provided in the case connection terminal 54. A GND connection member 100C is passed through the hole where the base portion 139, hole 35A, and hole 54A overlap. The Y capacitor 30 is fixed to the partition wall 136 via the GND connection member 100C. In a view from the TD plane in the thickness direction, the P-side connection member 100A and the N-side connection member 100B overlap the wiring hole 138. In a view from the TD plane in the thickness direction, the GND connection member 100C does not overlap the wiring hole 138.

[0064] Figure 9 is a plan view of the Y capacitor 30, excluding the Y capacitor case 33 and the covering resin 36, as seen from the exposed surface 36A side. A GND connection member 100C is provided in the first overlapping region 161 where the overlapping region in the depth direction DP of the P-side Y capacitor element 31 and the overlapping region in the width direction WD of the N-side Y capacitor element 32 overlap. A part of the P-side connection member 100A and the N-side connection member 100B are provided in the second overlapping region 162 where the overlapping region in the width direction WD of the P-side Y capacitor element 31 and the overlapping region in the depth direction DP of the N-side Y capacitor element 32 overlap. The P-side connection member 100A and the N-side connection member 100B are provided in a rectangle 163 of the Y capacitor case 33, which has a long side extending away from the hole 35A in the depth direction DP and a long side extending away from the hole 35A in the width direction WD.

[0065] Furthermore, as shown in Figure 10, the base portion 139 is provided closer to the side wall of the frame 131 that is closest to the P-side Y capacitor element 31 and the N-side Y capacitor element 32 than to the P-side Y capacitor element 31 and the N-side Y capacitor element 32. Specifically, in the depth direction DP, the base portion 139 is provided closer to the second wall portion 133 than to the P-side connecting member 100A and the N-side connecting member 100B. The GND connecting member 100C, N-side connecting member 100B, and P-side connecting member 100A are arranged in that order, moving away from the second wall portion 133. The GND connecting member 100C is provided between the P-side Y capacitor element 31 and the second wall portion 133. The GND connecting member 100C is provided closer to the second wall portion 133 than to the P-side Y capacitor element 31.

[0066] <Effects and Effects> In recent years, with the increase in switching speed in inverters and the tightening of EMC standards, the FM band, which was not a problem before, has become an issue, and noise reduction in this FM band is required. Therefore, it is required to install Y capacitors in power converters to remove noise in the FM band. Patent document 1 discloses a power converter equipped with two Y capacitor elements. A power converter in which two Y capacitor elements are arranged opposite each other is disclosed.

[0067] Noise current generated from the inverter flows through two Y-capacitor elements. The ends of each of the two Y-capacitor elements are connected to ground. Because the two Y-capacitor elements are positioned opposite each other, the mutual inductance between one Y-capacitor element and the other is large. As a result, for example, a magnetic field generated around the noise current flowing through one Y-capacitor element can easily induce a voltage in the other Y-capacitor element. Noise current will flow through the other Y-capacitor element in the opposite direction to the noise current flowing through the first Y-capacitor element. There is a concern that the flow of noise current to the other Y-capacitor will be hindered. In such a configuration, there was a risk that the noise reduction performance of the Y-capacitors would not be fully realized.

[0068] In this embodiment, the noise reduction performance of the Y capacitor is fully realized by devising the arrangement of the two Y capacitor elements. The power converter 10 of this embodiment has an inverter 11, a Y capacitor 30 that removes noise generated by the inverter 11, and a case 130 that houses them. The Y capacitor 30 has a P-side Y capacitor element 31, an N-side Y capacitor element 32, and a GND busbar 50. The P-side Y capacitor element 31 has a P-side first element terminal 31A and a P-side second element terminal 31B arranged in the depth direction DP. The N-side Y capacitor element 32 has an N-side first element terminal 32A and an N-side second element terminal 32B arranged in the width direction WD.

[0069] The GND busbar 50 is connected to the P-side second element terminal 31B, the N-side second element terminal 32B, and the connecting part 35. The GND busbar 50 connects the P-side Y capacitor element 31 and the N-side Y capacitor element 32 to ground. The P-side Y capacitor element 31 and the N-side Y capacitor element 32 are not facing each other in both the width direction WD and the depth direction DP. As a result, the mutual inductance between the P-side Y capacitor element 31 and the N-side Y capacitor element 32 is reduced. Therefore, it is less likely that an induced voltage will be generated in the other Y capacitor element by the magnetic field generated around the noise current flowing through one Y capacitor element. It is less likely that noise current will flow in the other Y capacitor element in the opposite direction to the noise current flowing through the first Y capacitor element. It is less likely that noise current will flow from the other Y capacitor element towards the inverter 11. This suppresses deterioration of noise rejection performance.

[0070] As explained above, the depth direction DP and the width direction WD are orthogonal. This means that the direction in which current mainly flows through the P-side Y capacitor element 31 and the direction in which current mainly flows through the N-side Y capacitor element 32 are orthogonal. This suppresses interference between the magnetic field generated around the P-side Y capacitor element 31 and the magnetic field generated around the N-side Y capacitor element 32.

[0071] A GND connection member 100C is provided in the first overlapping region 161 where the overlapping region in the depth direction DP of the P-side Y capacitor element 31 and the overlapping region in the width direction WD of the N-side Y capacitor element 32 overlap. This allows noise current to flow to ground via a short route for both the P-side Y capacitor element 31 and the N-side Y capacitor element 32. Since the route length is shortened, leakage of noise current to the outside is more easily suppressed. In addition, because space can be used efficiently, a miniaturization of the Y capacitor 30 can be expected.

[0072] The P-side second element terminal 31B of the P-side Y capacitor element 31 is located closer to the GND connection member 100C than the P-side first element terminal 31A. The N-side second element terminal 32B of the N-side Y capacitor element 32 is located closer to the GND connection member 100C than the N-side first element terminal 32A. This allows noise current to be efficiently channeled to ground for both the P-side Y capacitor element 31 and the N-side Y capacitor element 32. The shorter route length makes it easier to suppress noise current leakage to the outside.

[0073] A portion of the P-side connecting member 100A and the N-side connecting member 100B are provided in the second overlapping region 162 where the overlapping region in the width direction WD of the P-side Y capacitor element 31 and the overlapping region in the depth direction DP of the N-side Y capacitor element 32 overlap. This allows for a shorter wiring length for the P-side Y capacitor busbar 41 and the N-side Y capacitor busbar 42. As a result, it becomes easier to suppress noise current leakage from the P-side Y capacitor busbar 41 and the N-side Y capacitor busbar 42 to the outside. Furthermore, because space can be used efficiently, a reduction in the size of the Y capacitor can be expected.

[0074] The base portion 139 is positioned closer to the side wall of the frame 131 that is closest to the P-side Y-capacitor element 31 and the N-side Y-capacitor element 32 than to at least one of the P-side Y-capacitor element 31 and the N-side Y-capacitor element 32. Specifically, in the depth direction DP, the base portion 139 is positioned closer to the second wall portion 133 than to the P-side connecting member 100A and the N-side connecting member 100B. This shortens the distance between the base portion 139 and the frame 131. Since the current path between the base portion 139 and the frame 131 is shortened, it becomes easier to suppress noise current leakage to the outside.

[0075] The storage space 140 is divided into a first storage space 141 and a second storage space 142 by a partition wall 136. A wiring hole 138 is provided in the partition wall 136 that penetrates in the thickness direction TD. The wiring hole 138 connects the first storage space 141 and the second storage space 142. A Y capacitor 30 is provided in the second storage space 142 so that the Y capacitor busbars 41 and 42 pass through the wiring hole 138. A base portion 139 is provided on the part of the partition wall 136 that faces the second storage space. Because the first storage space 141 and the second storage space 142 are separated by the partition wall 136 and the Y capacitor busbars 41 and 42 pass through the hole, the transfer of radiant heat from the inverter 11 to the Y capacitor elements 31 and 32 is suppressed. The performance of the Y capacitor elements 31 and 32 is suppressed. The noise suppression performance of the Y capacitor elements 31 and 32 is suppressed.

[0076] The P-side connecting member 100A and the N-side connecting member 100B are provided at positions that overlap with the wiring hole 138 in the thickness direction TD. This eliminates the need to provide holes for fastening tools to the P-side connecting member 100A and the N-side connecting member 100B separately from the wiring hole 138. The number of wiring holes 138 can be limited. The transfer of radiant heat from the inverter 11 to the Y capacitors 31 and 32 is suppressed. The deterioration of the noise rejection performance of the Y capacitors 31 and 32 is suppressed.

[0077] This disclosure is described in accordance with the 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 equivalence. 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 concept of this disclosure.

[0078] (Second Embodiment) In the first embodiment, a configuration was described in which the P-side Y capacitor element 31 and the N-side Y capacitor element 32 are not facing each other with respect to both the width direction WD and the depth direction DP. However, the arrangement of the P-side Y capacitor element 31 and the N-side Y capacitor element 32 is not limited to this. In the second embodiment, the P-side Y capacitor element 31 and the N-side Y capacitor element 32 can be configured in which parts of them are not facing each other. This also produces the same effects as in the first embodiment.

[0079] (Third embodiment) In the first embodiment, a configuration was described in which a GND connection member 100C is provided in the first overlapping region 161, and a part of the P-side connection member 100A and a part of the N-side connection member 100B are provided in the second overlapping region 162, but the embodiment is not limited to this. In the third embodiment, a configuration can be taken in which a part of the GND connection member 100C is provided in the first overlapping region 161. A configuration can be taken in which a part of the P-side connection member 100A and a part of the N-side connection member 100B are provided in the second overlapping region 162. A configuration can be taken in which these configurations are combined. This also produces the same effects as the first embodiment.

[0080] (Disclosure of technical ideas) This specification discloses several technical concepts, as listed in the following paragraphs. Some paragraphs are written in a multiple dependent form, where subsequent paragraphs optionally refer to preceding paragraphs. Some paragraphs are written in a multiple dependent form, referring to other multiple dependent forms. These paragraphs written in multiple dependent forms define several technical concepts.

[0081] (Technical thought 1) An inverter (11) that converts the power supplied from the battery (2), A Y capacitor (30) is used to remove noise generated by the inverter, The inverter and the case (130) housing the Y capacitor are included. The aforementioned Y capacitor is A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to the case, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the case, The device comprises the second terminal, the fourth terminal, and a GND busbar (50) connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. A power converter in which the P-side Y capacitor element and the N-side Y capacitor element are not facing each other with respect to a first direction (DP) where the first terminal and the second terminal are aligned, or a second direction (WD) where the third terminal and the fourth terminal are aligned.

[0082] (Technical thought 2) The power conversion device according to technical concept 1, wherein the first direction and the second direction are orthogonal.

[0083] (Technical Thought 3) A power conversion device according to technical concept 1 or 2, wherein at least a portion of a GND connecting member (100C) connecting the GND busbar and the case is provided in a first overlapping region (161) where a region overlapping the P-side Y capacitor element with respect to the first direction and a region overlapping the N-side Y capacitor element with respect to the second direction overlap.

[0084] (Technical Thought 4) The second terminal is provided closer to the GND connection member than the first terminal. The power conversion device according to any one of technical concepts 1 to 3, wherein the fourth terminal is provided closer to the GND connection member than the third terminal.

[0085] (Technical Thought 5) The inverter and the battery are further connected by a first high-voltage wiring (10A) and a second high-voltage wiring (10B), The Y capacitor further comprises a P-side Y capacitor wiring (41) connecting the first terminal and the first high-voltage wiring, and an N-side Y capacitor wiring (42) connecting the third terminal and the second high-voltage wiring. A power conversion device according to any one of technical ideas 1 to 4, wherein at least a portion of a first connecting member (100A) that connects the P-side Y capacitor wiring and the first high-voltage wiring, and a second connecting member (100B) that connects the N-side Y capacitor wiring and the second high-voltage wiring are provided in a second overlapping region (162) where a region overlapping the P-side Y capacitor element with respect to the second direction and a region overlapping the N-side Y capacitor element with respect to the first direction overlap.

[0086] (Technical Thought 6) The case comprises a frame (131) that houses the inverter and the Y capacitor and is connected to the ground, and an inner wall (136) connected to the inner surface of the frame. A base portion (139) is provided on the inner wall to which the GND connection member is connected. A power conversion device according to any one of technical concepts 1 to 5, wherein the base portion is provided closer to the side wall (133) of the frame that is closest to the P-side Y capacitor element and the N-side Y capacitor element than to at least one of the P-side Y capacitor element and the N-side Y capacitor element.

[0087] (Technical Thought 7) The storage space (132) enclosed by the aforementioned frame is divided into two by the aforementioned inner wall. The inverter, the first high-voltage wiring, and the second high-voltage wiring are provided in the first storage space (141) enclosed by a part of the frame and the inner wall. The Y capacitor is provided in the second storage space (142) surrounded by the remainder of the frame and the inner wall. The base portion is provided on the side of the inner wall to the second storage space, A hole (138) is formed in the inner wall that connects the first storage space and the second storage space. A power conversion device according to technical concept 6, wherein the P-side Y-con wiring and the N-side Y-con wiring are passed through the aforementioned holes.

[0088] (Technical Thought 8) The power conversion device according to technical concept 7, wherein the first connecting member and the second connecting member are provided in positions that overlap the hole in the first storage space.

[0089] (Technical Thought 9) The aforementioned Y capacitor is The device further comprises a first housing section (34A) for housing the P-side Y capacitor element, a second housing section (34B) for housing the N-side Y capacitor element, and a connecting section (35) connecting the first housing section and the second housing section. A portion of the GND busbar extends along the connecting portion, A power conversion device according to any one of technical concepts 6 to 8, wherein the portion of the GND busbar extending along the connecting portion is fastened to the base portion.

[0090] (Technical Thought 10) A Y capacitor (30) that removes noise generated in the inverter (11), A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to ground, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the ground, The device comprises a GND busbar (50) that electrically connects the second terminal, the fourth terminal, and the ground, A Y capacitor in which the P-side Y capacitor element and the N-side Y capacitor element are not facing each other with respect to a first direction (DP) where the first terminal and the second terminal are aligned, or a second direction (WD) where the third terminal and the fourth terminal are aligned. [Explanation of Symbols]

[0091] 100A First connecting member, 100B Second connecting member, 100C GND connecting member, 10A First high voltage wiring, 10B Second high voltage wiring, 11 Inverter, 130 Case, 131 Frame, 132 Storage space, 133 Side wall, 136 Inner wall, 138 Hole, 139 Base, 141 First storage space, 142 Second storage space, 161 First overlapping area, 162 Second overlapping area, 2 Battery, 30 Y capacitor, 31 P-side Y capacitor element, 31A First terminal, 31B Second terminal, 32 N-side Y capacitor element, 32A Third terminal, 32B Fourth terminal, 34A First storage section, 34B Second storage section, 35 Connecting section, 41 P-side Y capacitor wiring, 42 N-side Y-con wiring, 50 GND busbar, DP first direction, WD second direction

Claims

1. An inverter (11) that converts the power supplied from the battery (2), A Y capacitor (30) for removing noise generated by the inverter, The inverter and the case (130) for housing the Y capacitor are included. The aforementioned Y capacitor is A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to the case, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the case, The device comprises the second terminal, the fourth terminal, and a GND busbar (50) connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. With respect to the first direction (DP) where the first terminal and the second terminal are aligned, or the second direction (WD) where the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. A power conversion device in which the first direction and the second direction are orthogonal.

2. An inverter (11) that converts the power supplied from the battery (2), A Y capacitor (30) for removing noise generated by the inverter, The inverter and the case (130) for housing the Y capacitor are included. The aforementioned Y capacitor is A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to the case, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the case, The device comprises the second terminal, the fourth terminal, and a GND busbar (50) connected to the case, which connects the P-side Y capacitor element and the N-side Y capacitor element to ground. With respect to the first direction (DP) where the first terminal and the second terminal are aligned, or the second direction (WD) where the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. A power converter in which at least a portion of a GND connecting member (100C) connecting the GND busbar and the case is provided in a first overlapping region (161) where a region overlapping the P-side Y capacitor element in the first direction and a region overlapping the N-side Y capacitor element in the second direction overlap.

3. The power conversion device according to claim 2, wherein the first direction and the second direction are orthogonal.

4. The second terminal is provided closer to the GND connection member than the first terminal. The power conversion device according to claim 2 or 3, wherein the fourth terminal is provided closer to the GND connection member than the third terminal.

5. The inverter and the battery are further connected by a first high-voltage wiring (10A) and a second high-voltage wiring (10B), The Y capacitor further comprises a P-side Y capacitor wiring (41) connecting the first terminal and the first high-voltage wiring, and an N-side Y capacitor wiring (42) connecting the third terminal and the second high-voltage wiring. The power conversion device according to claim 4, wherein at least a portion of a first connecting member (100A) for connecting the P-side Y capacitor wiring and the first high-voltage wiring, and a second connecting member (100B) for connecting the N-side Y capacitor wiring and the second high-voltage wiring are provided in a second overlapping region (162) where the region overlapping the P-side Y capacitor element in the second direction and the region overlapping the N-side Y capacitor element in the first direction overlap.

6. The case comprises a frame (131) that houses the inverter and the Y capacitor and is connected to the ground, and an inner wall (136) connected to the inner surface of the frame. A base portion (139) to which the GND connecting member is connected is provided on the inner wall. The power conversion device according to claim 5, wherein the base portion is provided closer to the side wall (133) of the frame that is closest to the P-side Y capacitor element and the N-side Y capacitor element than to at least one of the P-side Y capacitor element and the N-side Y capacitor element.

7. The storage space (132) enclosed by the aforementioned frame is divided into two by the aforementioned inner wall. The inverter, the first high-voltage wiring, and the second high-voltage wiring are provided in the first storage space (141) enclosed by a part of the frame and the inner wall. The Y capacitor is provided in the second storage space (142) surrounded by the remainder of the frame and the inner wall. The base portion is provided on the side of the inner wall to the second storage space, A hole (138) is formed in the inner wall that connects the first storage space and the second storage space. The power conversion device according to claim 6, wherein the P-side Y-con wiring and the N-side Y-con wiring are passed through the hole.

8. The power conversion device according to claim 7, wherein the first connecting member and the second connecting member are provided in positions that overlap the hole in the first storage space.

9. The aforementioned Y capacitor is The device further comprises a first housing section (34A) for housing the P-side Y capacitor element, a second housing section (34B) for housing the N-side Y capacitor element, and a connecting section (35) connecting the first housing section and the second housing section. A portion of the GND busbar extends along the connecting portion, The power conversion device according to claim 8, wherein the portion of the GND busbar extending along the connecting portion is fastened to the base portion.

10. A Y capacitor (30) that removes noise generated by the inverter (11), A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to ground, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the ground, The device comprises the second terminal, the fourth terminal, and a GND busbar (50) that electrically connects the ground, With respect to the first direction (DP) where the first terminal and the second terminal are aligned, or the second direction (WD) where the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. A Y-capacitor where the first and second directions are orthogonal.

11. A Y capacitor (30) is housed in a case (130) together with the inverter (11) and removes noise generated by the inverter, A P-side Y capacitor element (31) having a first terminal (31A) electrically connected to the inverter and a second terminal (31B) electrically connected to ground, An N-side Y capacitor element (32) having a third terminal (32A) electrically connected to the inverter and a fourth terminal (32B) electrically connected to the ground, The device comprises the second terminal, the fourth terminal, and a GND busbar (50) that electrically connects the ground, With respect to the first direction (DP) where the first terminal and the second terminal are aligned, or the second direction (WD) where the third terminal and the fourth terminal are aligned, the P-side Y capacitor element and the N-side Y capacitor element are not facing each other. A Y capacitor in which at least a portion of a GND connecting member (100C) connecting the GND busbar and the case is provided in a first overlapping region (161) where a region overlapping the P-side Y capacitor element in the first direction and a region overlapping the N-side Y capacitor element in the second direction overlap.

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