Conductor unit, inverter device, motor unit and vehicle

Abstract

To provide a conductor unit which enables a shield wire to be grounded even in a narrow space, and to provide an inverter device, a motor unit, and a vehicle.SOLUTION: A conductor unit 20 is mounted on an inverter device of a vehicle and supplies electric power of a low voltage battery located outside the inverter device to an inverter control circuit board in the inverter device. The conductor unit 20 includes: a center wire 21; a shield member 23; and a cover member 24. The shield member 23 covers a periphery of the center wire 21 in a range of at least a part as seen in a length direction of the center wire 21. The cover member 24 covers a periphery of the shield member 23 in a range of at least a part as seen in a length direction of the shield member 23 and is disposed that a part of the shield member 23, which is not covered with the cover member 24, contacts with the housing.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a conductor unit, an inverter device, a motor unit, and a vehicle. [Background technology]

[0002] With the recent shift to electric vehicles (EVs), there is a demand for smaller inverter housings. In addition, in EVs, large currents are input to the drive motor, which increases electromagnetic noise in the inverter. This makes it necessary to apply noise suppression materials. As an EMC (Electro Magnetic Compatibility) measure, for example, Patent Document 1 discloses a structure in which a harness side connector shell is locked and electrically connected to an equipment side connector shell, thereby realizing grounding of the housing to the ground. Patent Document 2 discloses a structure in which a shielded wire electrically connects the equipment on the motor side and the equipment on the inverter side, and resistors are provided in both the equipment on the motor side and the equipment on the inverter side, and grounding to the earth on the motor side or the inverter side is achieved via the resistors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-35383 A [Patent Document 2] JP 2012-104352 A Summary of the Invention [Problem to be solved by the invention]

[0004] As inverter housings become smaller, the location of the shielded wire may be limited. Even in such cases, it is necessary to ground the shielded wire.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a conductor unit, an inverter device, a motor unit, and a vehicle that enable a shield to be grounded even when the location for placing the shielded electric wire is limited. [Means for solving the problem]

[0006] A conductor unit according to one aspect of the present invention is a conductor unit that inputs electric power from an external power supply to a power conversion device, the power conversion device having a housing made of a metal plate, the conductor unit having a central electric wire, a shielding member, and a covering member, the shielding member covering the periphery of the central electric wire over at least a portion of the longitudinal direction of the central electric wire, and the covering member covering the periphery of the shielding member over at least a portion of the longitudinal direction of the shielding member. At the exposed portion of the shielding member, the covering member does not cover the shielding member, and the conductive unit is configured such that the shielding member is It is placed so that it touches the housing. At the exposed portion, the shield member is pressed and fixed in a state in which the shape of the radial cross section is deformed, and the extending direction of the central electric wire is changed at the exposed portion. Conductor unit. Effect of the Invention

[0007] According to the present invention, it is possible to provide a conductor unit, an inverter device, a motor unit, and a vehicle that are capable of grounding a shield even when the location for disposing a shielded electric wire is limited. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of a vehicle equipped with an inverter device according to the present invention; [Diagram 2] FIG. 2 is an exploded view of the inverter device shown in FIG. [Diagram 3] FIG. 2 is a schematic diagram of a conductor unit according to the first embodiment. [Figure 4] FIG. 4 is an explanatory diagram of the arrangement of the conductor unit in the inverter housing according to the present invention. [Diagram 5] 4A and 4B are explanatory diagrams of the arrangement of a housing grounding member according to the present invention. [Figure 6] FIG. 11 is a schematic diagram of a conductor unit according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, a conductor unit 20, an inverter control device 10, and a vehicle 1 according to an embodiment of the present invention will be described with reference to the drawings. In the following drawings, the scale and number of each structure may differ from the actual structure in order to make each configuration easier to understand. Also, in Fig. 3 and Fig. 6, the covering member 24 is shown transparently so that the positional relationship between the central electric wire 21, the shielding member 23, and the covering member 24 in the conductor unit 20 can be seen.

[0010] First Embodiment <Motor unit> In Fig. 1, a motor unit 2 is mounted on a vehicle 1. The motor unit 2 includes an electric motor 15 and an inverter control device 10. The electric motor 15 is, for example, a three-phase AC motor, and is a driving force source for the vehicle 1. A rotating shaft of the electric motor 15 is connected to a reduction gear 6 and a differential gear 7. As a result, the driving force (torque) of the electric motor 15 is transmitted to a pair of wheels 5a, 5b via the reduction gear 6, the differential gear 7, and a drive shaft (drive shaft) 8.

[0011] <Inverter control device> The inverter control device 10 includes a power module unit 13 that supplies drive power to the electric motor 15, a power module control circuit board (first circuit board) 12 that outputs a drive signal to the power module unit 13, an inverter control circuit board (second circuit board) 11 that outputs a control signal to the power module control circuit board 12 using power from a low-voltage battery LV, and a capacitor unit (electronic component unit) 14 that smoothes the voltage from the high-voltage battery HV. The inverter control device 10 is controlled by a control signal from a control unit 3 that is responsible for controlling the entire vehicle 1, and drives the electric motor 15.

[0012] The power module unit 13 has six power switching elements in total, two for each of the U, V, and W phases (the upper arm power switching element and the lower arm power switching element). The power converter has a bridge circuit (power conversion circuit) in which the above power switching elements are connected. Examples of power switching elements include IGBTs (Insulated Gate Bipolar Transistors), MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), and bipolar junction transistors, which use compounds such as silicon carbide (SiC) and gallium nitride (GaN).

[0013] The power module unit 13 uses the power of the low-voltage battery LV to switch the power switching elements on and off according to a drive signal (PWM control signal) generated by the power module control circuit board 12. As a result, the power module unit 13 converts DC power supplied from the high-voltage battery (power source) HV via the capacitor unit 14 into AC power (three-phase AC power), supplies it to the electric motor 15, and drives the electric motor 15.

[0014] The high-voltage battery HV is provided outside the inverter control device 10 and is installed in the vehicle 1. The high-voltage battery HV is a supplier of electric energy that is the power source of the vehicle 1, and is, for example, a battery of 100 V or more that is composed of multiple secondary batteries. In the inverter control device 10, a capacitor unit 14 is disposed at a connection between the high-voltage battery HV and the power module unit 13. The capacitor unit 14 is connected between a high-potential line (positive electrode potential B+) and a low-potential line (negative electrode potential B- (GND)). This capacitor unit 14 has a function of smoothing the input voltage from the high-voltage battery HV, and includes a large-capacity smoothing capacitor (film capacitor).

[0015] In FIG. 2, the inverter housing 100 is provided with a low-voltage battery LV as a separate component on the outside. The converter housing 100 is made of metal such as aluminum, and is molded by die casting. The low voltage battery LV is a supply source of electric energy to the inverter control circuit board 11, and is, for example, a battery of 30 V or less that is composed of a plurality of secondary batteries. The inverter housing 100 includes a peripheral wall 102 provided around a bottom wall 101 (not shown), and an opening 103 formed by an end edge of the peripheral wall 102. When the surface on which the bottom wall 103 is disposed is a surface extending in the X-axis direction and the Y-axis direction perpendicular to the X-axis direction, the peripheral wall 102 extends along the Z-axis direction perpendicular to the XY plane. The opening 103 includes an area defined by the end edges of the peripheral wall 102 and the end edges of the peripheral wall 102. Peripheral wall 102 of the inverter housing has connecting portion 105, which is a recess into which a rod-shaped member is inserted and fixed when connecting opening 103 to a cover portion (not shown) that covers opening 103. Connecting portion 105 is a recess that is recessed in the Z-axis direction, for example. The cover portion is, for example, an open housing that houses the motor 15, the reducer 6, the differential gear 7, and the drive shaft 8 shown in FIG. 1, and the housing of the motor unit 2 is assembled by connecting the opening 103 on the inverter housing 100 side with the opening on the motor unit 2 side.

[0016] The inverter control circuit board 11, the conductor unit 20, and the capacitor unit 14 are provided inside the inverter housing 100. The capacitor unit 14 and the inverter control circuit board 11 are arranged to overlap in the Z-axis direction. The peripheral wall 102 of the inverter housing 100 is provided with a connection hole 104 penetrating the peripheral wall 102 in the X-axis direction. The battery side connector 20A is inserted into the connection hole 104. The board side connector 20B is inserted into the male or female connector on the control circuit board 11 and fixed.

[0017] <Conductor unit> As shown in Fig. 3, the conductor unit 20 has a battery-side connector 20A at one end in the longitudinal direction and a board-side connector 20B at the other end. Power supplied from the low-voltage battery LV is transmitted to the inverter control circuit board 11 via the conductor unit 20. Furthermore, as shown in Fig. 2, the conductor unit 20 is arranged in a bent state. This allows the conductor unit 20 to be arranged in the inverter housing 100 so as to avoid electronic components such as the capacitor unit 14.

[0018] As shown in FIG. 3, the conductor unit 20 is made up of a battery-side connector 20A, a board-side connector 20B, a central wire 21, a ground member 22, a shield member 23, and a covering member 24.

[0019] The central electric wire 21 is an electric wire that transmits power supplied from the low-voltage battery LV to the inverter control circuit board 11, and is, for example, a harness including a conductor covered with a coating. The central electric wire 21 may be a single harness or a bundle of multiple harnesses.

[0020] The shielding member 23 is a conductive member that covers at least a portion of the periphery of the central wire 21, and examples thereof include a tin-plated copper wire and a thin sheet-like metal member formed by weaving PET monofilaments.

[0021] The covering member 24 is an insulating member that covers at least a portion of the periphery of the shielding member 23. Since the shielding member 23 covers the central conductor 21, the covering member 24 is arranged so as to indirectly cover the central conductor 21 with the shielding member 23 sandwiched therebetween. The covering member 24 is an insulating member, and examples thereof include a member formed into a cylindrical shape by wrapping a strip of polyvinyl chloride tape around the shielding member 23 several times, and an elastic tube containing polyurethane, a silicon compound, a fluoride, etc. The covering member 24 covers the shielding member 23 in a state where pressure is applied to the shielding member 23 from the outer surface of the shielding member 23 toward the central electric wire 21. Therefore, the density of the shielding member 23 is configured to be higher by being covered with the covering member 24 than when not covered with the covering member 24. The covering member 24 is composed of a first covering member 241 and a second covering member 242, and the first covering member 241 and the second covering member 242 are arranged with a space between them from the side closer to the battery side connector 20A. The range of the shielding member 23 that is between the first covering member 241 and the second covering member 242 and is not covered by the covering member 24 (i.e., the range where the shielding member 23 is exposed) will be described as an exposed portion 25.

[0022] <Exposed part> The exposed portion 25 is configured by the central electric wire 21 and the shielding member 23 that covers the periphery thereof, whereas the exposed portion 25 and its adjacent portion in the longitudinal direction are configured by covering the periphery of the central electric wire 21 and the shielding member 23 with the covering member 24. Thus, compared to the portion adjacent to the exposed portion 25 and the central electric wire 21 in the longitudinal direction, the exposed portion 25 is easier to bend and the shape of the radial cross section is easier to deform since there is no covering member 24. In other words, it has high flexibility. As described later, the conductor unit 20 is disposed in the inverter housing 100 by bending the highly flexible exposed portion 25 and without bending the portion covered with the less flexible covering member 24 more than the exposed portion 25 .

[0023] <Positional Relationship Between Exposed Part and Housing 100> As shown in Figures 4a and 4b, housing 100 accommodates conductor unit 20, inverter control circuit board 11, and capacitor unit 14. In Figures 4a and 4b, one in-plane direction of bottom wall 101 is defined as the X direction, a direction perpendicular to the X direction is defined as the Y direction, and a direction perpendicular to bottom wall 101 is defined as the Z direction. Opening 103 is located in the Z direction of bottom wall 101, and control circuit board 11 is disposed overlapping and above capacitor unit 14 in the Z direction.

[0024] As shown in FIG. 4a, first, the central electric wire 21 extends from the battery side connector 20A inserted into the connection hole 104 along the X-axis direction. Next, the extending direction of the central electric wire 21 is changed to the Z-axis direction just before the first covering member 241. Then, the central electric wire 21 covered with the first covering member 241 extends along the Z-axis direction. Next, the extending direction is changed to the X-axis direction at the highly flexible exposed portion 25. Then, the central electric wire 21 covered with the second covering member 242 extends along the X-axis direction. The board side connector 20B is connected to the inverter control circuit board 11. That is, the conductor unit 20 changes the extending direction twice, once at the exposed portion 25.

[0025] As shown in FIG. 4b, the housing 100 has an opening 103 and a connecting portion 105. The opening 103 is formed by the Z-direction end of the peripheral wall 102, and is covered with a cover (not shown). The connecting portion 105 is a recess through which a rod for connecting the opening 103 and the cover is inserted. The exposed portion 25 is disposed so as to pass between the connecting portion 105 and the capacitor unit 14. Furthermore, when viewed from above in the Z direction, the distance between the capacitor unit 14 and the connecting portion 105 is smaller than the diameter of the exposed portion 25, and the exposed portion 25 is pressed by the capacitor unit 14 and the connecting portion 105, and is fixed in a state in which the shape of the radial cross section of the exposed portion 25 is deformed.

[0026] <Harness> The grounding member 22 shown in Fig. 3 is disposed so as to electrically connect the conductor unit 20 and the inverter housing 100 shown in Fig. 2. The grounding member 22 includes a grounding wire 221, a shield connection part 222, and a housing grounding part 223. The grounding wire 221 includes the shield connection part 222 at one end and the housing grounding part 223 at the other end. For example, a harness including a conductor covered with a coating can be mentioned. The shield grounding member 222 and the housing grounding part 223 are both conductive metal members and are electrically connected to the grounding wire 221. The grounding wire 221 is flexible and thinner than the central electric wire 21.

[0027] 3, the ground wire 221 is divided into an extending portion 22A, a bent portion 22B, and an extending portion 22C. In other words, the extending portion 22A, the bent portion 22B, and the extending portion 22C are electrically connected to each other. The extension portion 22A is electrically connected to the shield connection portion 222, and the extension portion 22C and the housing ground portion 223 are electrically connected to each other.

[0028] The extension portion 22A is disposed on the outer surface of the shield member 23 along the extension direction of the conductor unit 20, and changes the extension direction via the bent portion 22B. The extension portion 22C extends toward the peripheral wall 102 of the inverter housing 100 shown in Fig. 2 or toward the bottom wall 101 shown in Fig. 4a. The shield connection portion 222 and a part of the extension portion 22A are sandwiched between the shield member 23 and the covering member 24 in the radial direction of the central electric wire 21.

[0029] The shield connection portion 222 is electrically connected to the shield member 23. The housing ground portion 223 is electrically connected to the peripheral wall 102 or the bottom wall 101 (not shown in FIG. 3) of the inverter housing 100. As shown in Fig. 3, the housing grounding part 223 is an annular member. Furthermore, as shown in Fig. 5, a fixing member such as a bolt 224 is passed through the annular housing grounding part 223 to fix it to the inverter housing 100 and to pass electricity therethrough. The bolt 224 is a conductive member, and electricity is passed between the housing grounding part 223 and the inverter housing 100 via the bolt 224. To summarize the above-mentioned configuration, the configuration is such that noise flowing through the shield member 23 is transmitted to the inverter housing 100 via the grounding member 22.

[0030] <Action and effect> As described above, the conductor unit 20 of this embodiment is a conductor unit 20 to be mounted on the vehicle 1. The conductor unit 20 has at least an exposed portion 25 whose outer surface is configured with a shielding member 23 and a portion whose outer surface is configured with a covering member 24, and the exposed portion 25 is in contact with the inverter housing 100. According to this configuration, even when the location for placing the conductor unit 20 is limited, it is possible to adjust and place the exposed portion 25 by adjusting the bending angle, the radial length of the exposed portion 25, and the length of the exposed portion 25 in the longitudinal direction of the central electric wire 21. This further contributes to both miniaturization of the inverter and noise countermeasures.

[0031] In this embodiment, the exposed portion 25 is disposed in a space narrower than the radial length of the exposed portion 25 and part of the space is formed by the peripheral wall 102 or the bottom wall 101 of the inverter housing 100 . According to this configuration, exposed portion 25 can be pressed and reliably brought into contact with peripheral wall 102 or 103 of the inverter housing, enabling current to flow. Furthermore, since shielding member 23 of exposed portion 25 is pressed, the metal density of shielding member 23 is improved compared to a portion not pressed, and the noise shielding effect of conductor unit 20 is improved.

[0032] In this embodiment, a part of the outer surface of the conductor unit 20 is formed of the covering member 24, and the covering member 24 covers the outer surface of the central electric wire 21 covered by the shielding member 23. The covering member 24 applies pressure to the shielding member 23 from the radial outside of the central electric wire 21. In other words, the covering member 24 tightens the shielding member 23. According to this configuration, the shielding member 23 is tightened, so that the metal density of the shielding member 23 is improved compared to a case in which the covering member 24 does not apply pressure to the shielding member 23, and the noise shielding effect of the conductor unit 20 is improved.

[0033] In this embodiment, the shield connection portion 222 and a portion of the extension portion 22A of the ground member 22 in the longitudinal direction are covered by a covering member 24. According to this configuration, the shield connecting portion 222 and the shield member 23 are connected more firmly than when the shield connecting portion 222 is not covered by the covering member 24, and the possibility of the connection being disconnected due to vibration of the vehicle 1 or the like can be reduced. Furthermore, since at least a part of the extension portion 22A is covered by the covering member 24, the extension portion 22A and the shield member 23 are integrated, and it is possible to reduce the amount of play that may easily cause the ground member 22 to come off from the conductor unit 20. Therefore, it becomes possible to assemble the conductor unit 20 to the inverter housing 100 without damaging the extension portion 22A.

[0034] In this embodiment, the conductor unit 20 has a grounding member 22, and the grounding member 22 is configured to electrically connect the shielding member 23 and the inverter housing 100 by contacting the housing grounding portion 223 with the peripheral wall 102 or the bottom wall 101 of the inverter housing 100. According to this configuration, the conductor unit 20 can achieve two-point grounding by grounding at the exposed portion 25 and at the housing grounding portion 223 .

[0035] In this embodiment, the grounding member 22 has a ring-shaped housing grounding portion 223 at the end of the extension portion 22C connected to the bent portion 22B. Thus, the extension portion 22A of the grounding member 22 is disposed along the extension direction of the central electric wire 21, and the extension direction of the grounding wire 221 is changed starting from the bent portion 22B, so that the extension portion 22C is extended in the direction in which the space inside the inverter housing 100 is open, and is grounded to the peripheral wall 102 or the bottom wall 101 of the inverter housing 100 via the housing grounding portion 223. According to this configuration, even when the arrangement space for the conductor unit 20 is limited, the ground wire 221 has flexibility and can be easily arranged in any available space.

[0036] In this embodiment, the difference between exposed portion 25 in conductor unit 20 and the portion whose outer surface is formed of covering member 24 is whether or not covering member 24 is present on the surface. In other words, excluding covering member 24 from the portion whose outer surface is formed of covering member, it becomes exposed portion 25. According to this configuration, the exposed portion 25 is formed simply by removing the covering member 24, and the absence of the covering member 24 increases flexibility compared to a state in which the covering member 24 is present, making it possible to ground the inverter housing 100. In other words, this leads to lower costs and fewer assembly steps than when grounding is achieved by adding a separate member.

[0037] 2, board-side connector 20B is disposed on inverter control circuit board 11 at a position close to connection hole 104. That is, conductor unit 20 is configured such that central wire 21 constituting conductor unit 20 is shorter than when board-side connector 20B is disposed farther from connection hole 104. With this configuration, the conductor unit 20 can be made less susceptible to the effects of surrounding noise than if the central wire 21 were longer.

[0038] Second Embodiment In the above-described first embodiment, an example has been described in which the covering member 24 covers a part of the shielding member 23, the exposed portion 25 not covered by the covering member 24 is disposed so as to contact the inverter housing 100, and a part of the ground wire 221 is sandwiched between the covering member 24 and the shielding member 23, but this is not limiting. For example, the conductor unit 20 may have a core portion 27 between the shielding member 23 and the covering member 24. In the second embodiment, the same components as those in the above-described first embodiment are denoted by the same reference numerals, and detailed descriptions thereof will be omitted.

[0039] <Core> 6, the conductor unit 20 has a core portion 27. The core portion 27 is cylindrical with one through hole, and the central electric wire 21 covered with the shielding member 23 passes through the inside of the through hole of the cylinder. In the longitudinal direction of the central electric wire 21, the length of the core portion 27 (height of the tube) is shorter than the length of the first covering member 241, and in the radial direction of the central electric wire 21, the length of the core portion 27 (outer diameter of the tube) is shorter than the first covering member 241. For example, core portion 27 may be a core made of a magnetic material such as ceramics whose main component is iron oxide, and the core may be housed in a resin core case, or the core may be a standalone core without a core case. Here, the cylindrical shape includes a cylindrical shape, an elliptical cylindrical shape, a rectangular cylindrical shape (for example, a square rectangular cylindrical shape, a triangular cylindrical shape, a pentagonal cylindrical shape, a hexagonal cylindrical shape, etc.), and an irregular cylindrical shape.

[0040] A groove 271 is provided on the radially outer surface of the cylindrical core portion 27, recessed along the extension direction of the cylinder. That is, the groove 271 is provided on the radially outer surface of either the core containing a magnetic material or the resin core case. The groove 271 opens to the radially outer side of the cylinder of the core portion 27. For example, when a separate member is completely placed in the groove 271 from the radially outer side, the separate member and the core portion 27 can be combined without changing the outer diameter including the thickness of the core portion 27.

[0041] The width of groove 271 in the circumferential direction of cylindrical core portion 27 is larger than the thickness of extension portion 22A of ground wire 221, and at least a part of extension portion 22A is disposed to be contained in groove 271. The extension direction of core portion 27, central wire 21, and extension portion 22A are disposed along the extension direction of conductor unit 20. More specifically, the central electric wire 21 passes through the through hole of the core portion 27 while being covered with the shielding member 23, and the extension portion 22A is accommodated in the groove portion 271 of the core portion 27. When the central electric wire 21 has passed through and been accommodated in the core portion 27, the periphery of the core portion 27 is covered with the first covering member 241. That is, by covering the core portion 27 with the first covering member 241, a part of the central electric wire 21, a part of the shielding member 23, and a part of the extension portion 22A are arranged so as to be covered and integrated with the first covering member 241.

[0042] The above configuration also includes a configuration in which the central electric wire 21 covered with the covering member 24 with the shielding member 23 sandwiched therebetween passes through the through hole of the core portion 27. A configuration in which the shielding member 23 and the central electric wire 21 pass through the through hole of the core portion 27 in a state where they are fastened by the covering member 24, the extension portion 22A is accommodated in the groove portion 271 of the core portion 27, and the periphery of the core portion 27 is covered with the covering member 24 in a state where the passing and accommodation are completed may also be adopted.

[0043] In the electrical conductor unit 20, the core portion 27 is covered from above with a first covering member 241, for example.

[0044] <Action and effect> In this embodiment, the conductor unit 20 energizes the shielding member and the inverter casing 100 at two points, the exposed portion 25 and the casing ground portion 223, while a portion of the conductor unit 20 passes through the through hole of the cylindrical core portion 27. According to this configuration, high-frequency (e.g., 30-100 MHz) noise can be reduced by grounding the exposed portion 25 and the housing grounding portion 225 of the conductor unit 20 to the inverter housing 100, while low-frequency (e.g., 5-20 MHz) noise can be reduced by the core portion 27, thereby reducing the effects of noise over a wider range compared to when the core portion 27 is not provided.

[0045] In this embodiment, the core portion 27 has a groove portion 271, and is arranged so that the extension portion 22A of the ground member 22 fits into the groove portion 271. In this state, the periphery of the core portion 27 is covered with a first covering member 241. According to this configuration, extension portion 22A can be kept fixed in groove portion 271 between the first covering member and core portion 27. Therefore, extension portion 22A does not move in the circumferential direction of core portion 27, which reduces friction between covering member 24 and ground member 22 and prevents damage to extension portion 22A caused by contact with members other than conductor unit 20. Furthermore, since the first covering member 24 covers the entire outer surface of the core portion 27 and part of the shielding member 23 while applying pressure radially inwardly to the central electric wire 21, the core portion 27 can be prevented from moving in the extension direction of the central electric wire 21.

[0046] <Modification> The shapes and combinations of the components shown in the above examples are merely examples and can be modified in various ways based on design requirements, etc. In the above embodiment, the conductor unit is described as being mounted on an inverter, a motor unit, and a vehicle, but is not limited thereto. For example, the conductor unit may be mounted on an electronic component other than an inverter, such as a converter, or on a moving body other than a vehicle, such as a ship or an aircraft.

[0047] In the above embodiment, the conductor unit 20 is configured to include the covering member 24, but the covering member 24 may be omitted. As long as the shielding member 23 is electrically connected to the inverter housing 100, the central electric wire 21 may simply be covered with the shielding member 23. In other words, the entire area covered with the shielding member 23 may be the exposed portion 25.

[0048] In the above embodiment, the cover portion is an open housing of the motor unit 2 (not shown), and the housing of the motor unit 2 is assembled by connecting the opening 103 on the inverter housing 100 side to the opening on the motor unit 2 side, but this is not limited to the above. The cover portion may have any configuration as long as it can cover the entire opening 103 on the inverter housing 100 side. For example, the cover portion may be a plate-shaped cover portion, and the inverter housing 100 covered by the cover portion may be connected to the motor housing to form the housing of the motor unit 2.

[0049] In the above embodiment, the inverter housing 100 has the bottom wall 101, but the bottom wall 101 may be disposed in any direction when mounted on the vehicle 1. For example, the bottom wall 101 may be disposed above the opening 103 in the direction of gravity or along the direction of gravity.

[0050] In the above embodiment, the first covering member 241 and the second covering member 242 are given as an example of the covering member 24, but the number of covering members is not limited to this. In the conductor unit 20, any configuration is possible as long as the shielding member 23 covered with the covering member 24 and the uncovered shielding member 23 (exposed portion 25) are mixed.

[0051] In the above embodiment, the outer circumferential surface of the core portion 27 is covered with the first covering member 241, but the present invention is not limited to this. As long as the central electric wire 21 passes through the through hole of the core portion 27, the core portion may be disposed anywhere in the conductor unit 20.

[0052] In the above embodiment, a part of the extension portion 22A and the shield connection portion 222 constituting the grounding member 22 are described as being covered by the covering member 24, but this is not limited thereto. As long as the electrical continuity between the shielding member 23 and the inverter housing 100 is maintained by the grounding member 22, the grounding member 22 may be fixed anywhere in the conductor unit 20.

[0053] In the above embodiment, the embodiment has been described by taking as an example the central electric wire 21 alone that is connected to the battery side connector 20A, but this is not limiting. For example, in addition to the central electric wire 21, an electric wire different from the central electric wire 21 may be connected to the battery side connector 20A, and the power of the low voltage battery LV may be output to electronic components other than the inverter control circuit board 11. Furthermore, the grounding member 22, shielding member 23, covering member 24, and core portion 27 of the present invention may be applied to the electric wire different from the central electric wire 21.

[0054] In the above embodiment, the exposed portion 25 is disposed between the connecting portion 105 and the capacitor unit 14 inside the inverter housing 100, but this is not limited thereto. The exposed portion 25 may be disposed anywhere inside the inverter housing 100 as long as electrical continuity between the inverter housing 100 and the exposed portion 25 is maintained. Furthermore, the conductor unit 20 may be provided with a second harness different from the grounding member 22, and electrical continuity between the exposed portion 25 and the inverter housing 100 may be achieved via the second harness.

[0055] Although the preferred embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to such an example. The shapes and combinations of the components shown in the above example are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention. The components described above as the embodiment or its modified examples can be appropriately combined without departing from the spirit of the present invention, and some of the combined components can be omitted as appropriate. [Explanation of symbols]

[0056] REFERENCE SIGNS LIST 1 vehicle, 2 motor unit, 3 control unit, 5a, 5b wheels, 6 speed reducer, 7 differential gear, 8 drive shaft (drive shaft), 10 inverter control device, 11 inverter control circuit board, 12 power module control circuit board, 13 power module unit, 14 capacitor unit, 15 electric motor, LV low voltage battery, HV high voltage battery, 100 inverter housing, 101 bottom wall, 102 peripheral wall, 103 Opening, 104 connection hole, 105 connection portion, 20 conductor unit, 20A battery side connector, 20B board side connector, 21 central wire, 22 grounding member, 221 grounding wire, 222 shield connection portion, 223 housing grounding portion, 224 bolt, 22A, 22C extension portion, 22B bent portion, 23 shielding member, 24 covering member, 241 first covering member, 242 second covering member, 25 exposed portion, 27 core portion, 271 groove portion

Claims

1. A conductor unit that inputs power from an external power supply to a power conversion device, The power conversion device includes a housing made of a metal plate, The conductor unit includes a central wire, a shielding member, and a covering member. the shielding member covers the periphery of the central electric wire in at least a portion of a longitudinal direction of the central electric wire, the covering member covers the periphery of the shielding member in at least a portion of the range in the longitudinal direction of the shielding member, and the covering member does not cover the shielding member in an exposed portion of the shielding member, the conductor unit is disposed such that the shielding member is in contact with the housing at the exposed portion, The shield member is pressed at the exposed portion, and fixed in a state in which the shape of the radial cross section is deformed, and the extending direction of the central electric wire is changed at the exposed portion. Conductor unit.

2. 2. The conductor unit according to claim 1, wherein the covering member comprises a first covering member covering one side in the longitudinal direction of the shielding member, and a second covering member covering the other side.

3. The conductor unit according to claim 1 or 2, further comprising a harness that electrically connects the shielding member and the housing.

4. The conductor unit according to claim 3 , wherein a portion of the harness in the longitudinal direction is disposed between the covering member and the shielding member in the radial direction of the central wire.

5. The housing includes a bottom wall portion and a peripheral wall portion connected to the bottom wall portion and provided around the bottom wall portion, At least a portion of the shielding member is housed in the housing, The power converter includes a capacitor.

5. The conductor unit according to claim 1, wherein when the bottom wall portion is viewed from above, a distance from the peripheral wall portion to the capacitor has a point that is shorter than a radial length of the central wire covered by the shielding member.

6. The housing has an opening formed by an end side of the peripheral wall portion, A cover portion that covers the opening from above, The peripheral wall portion has a connecting portion that connects to the cover portion, The conductor unit according to claim 5 , wherein when the housing is viewed from above, a distance from the connecting portion to the capacitor has a portion that is shorter than a radial length of the central wire covered by the shielding member.

7. the conductor unit has a first connector and a second connector at both ends of the central wire, The housing has a connection hole penetrating the peripheral wall in a thickness direction, The power converter has a control circuit board, The first connector is inserted into the connection hole, the second connector is disposed on the control circuit board; The connection hole is provided below the control circuit board when viewed from above the opening. The conductor unit according to claim 6 .

8. The housing includes a bottom wall portion and a peripheral wall portion connected to the bottom wall portion and provided around the bottom wall portion, At least a portion of the shielding member is housed in the housing, The power converter includes a capacitor. when the bottom wall portion is viewed from above, a distance from the peripheral wall portion to the capacitor is shorter than a radial length of the central electric wire covered by the shielding member at a portion thereof, The housing has an opening formed by an end side of the peripheral wall portion, A cover portion that covers the opening from above, The peripheral wall portion has a connecting portion that connects to the cover portion, When the housing is viewed from above, a distance from the coupling portion to the capacitor is shorter than a radial length of the central electric wire covered with the shielding member at a portion thereof, the conductor unit has a first connector and a second connector at both ends of the central wire, The housing has a connection hole penetrating the peripheral wall in a thickness direction, The power converter has a control circuit board, The first connector is inserted into the connection hole, the second connector is disposed on the control circuit board; the connection hole is provided below the control circuit board when viewed from above the opening, the first covering member is disposed closer to the first connector than the second covering member; the central electric wire between the first connector and the first covering member extends in a thickness direction of the peripheral wall portion, the central wire covered with the first covering member extends in a height direction of the housing, The shield member that is not covered by the covering member is bent, The electric conductor unit according to claim 2 , wherein the extending direction of the electric conductor unit is changed to an in-plane direction of the control circuit board.

9. Further comprising a cylindrical core portion containing a magnetic material, The electric conductor unit according to claim 1 , wherein the central electric wire passes through a through hole of the cylindrical core portion.

10. Further comprising a cylindrical core portion containing a magnetic material, The central electric wire is configured to pass through a through hole of the cylindrical core portion, A groove portion is provided on an outer peripheral surface of the core portion, the groove portion being recessed in a radial direction. The groove portion has a band shape extending in the axial direction of the cylindrical core portion, The harness is received in the groove, The central electric wire covered with the shielding member passes through a through hole of the cylindrical core portion, The electric conductor unit according to claim 3 , wherein the covering member is configured to cover the periphery of the core portion.

11. An inverter device comprising the conductor unit according to any one of claims 1 to 10.

12. A motor unit comprising the inverter device according to claim 11.

13. A vehicle equipped with the motor unit according to claim 12.

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