Inverter device

Abstract

A wire harness unit and an inverter device including the same contribute to improvement of a noise suppression effect while achieving compactness of a structure. The wire harness unit of the present invention includes: a first wire harness for transmitting a first object; a second wire harness for transmitting a second object different from the first object; a first core portion having a through-hole through which the first wire harness passes and being composed of a magnetic material; a second core portion having a through-hole through which the second wire harness passes and being composed of a magnetic material different from the first core portion; and a retainer that retains the first core portion and the second core portion adjacent to each other.

Description

Technical Field

[0001] The present invention relates to a wiring harness unit and an inverter device including the wiring harness unit. Background Technology

[0002] Previously, there was an inverter module that, in order to suppress the influence of noise, had noise reduction sections at both the input and output ends. These noise reduction sections included multiple leads for current flow and a cylindrical ferrite core through which the multiple leads passed (see Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. JP2008-125248A

[0004] In practice, inverter devices typically include multiple wire harnesses that transmit different things, such as electricity or signals. As a result, these wire harnesses generate different noises, and external noise also has different effects on them. While passing these multiple wire harnesses through a cylindrical magnetic core can make the structure more compact, it may not be able to effectively suppress the different frequencies of noise that affect each wire harness. Summary of the Invention

[0005] The present invention was made in view of the above-mentioned problems, and aims to provide a wiring harness unit and an inverter device including the wiring harness unit, which helps to improve the noise (electrical noise) suppression effect while achieving a compact structure.

[0006] To achieve the above objectives, the present invention provides a wire harness unit comprising: a first wire harness for conveying a first object; a second wire harness for conveying a second object different from the first object; a first core having a first through hole through which the first wire harness passes and being made of a magnetic material; a second core having a second through hole through which the second wire harness passes and being made of a magnetic material different from the first core; and a retaining member holding the first core and the second core adjacent to each other.

[0007] The wire harness unit according to the present invention includes: a first core having a first through hole for a first wire harness to pass through, and being made of a magnetic material; a second core having a second through hole for a second wire harness to pass through, and being made of a different magnetic material than the first core; and a retaining member that holds the first core and the second core adjacent to each other. Therefore, the retaining member can be used to compactly hold the first wire harness and the second wire harness via the first core and the second core, which helps to achieve a compact structure. Furthermore, the first core and the second core can be constructed with suitable magnetic materials according to the different wire harnesses being transmitted, which helps to improve the noise suppression effect.

[0008] In addition, to achieve the above objectives, the present invention provides an inverter device including the above-mentioned wiring harness unit.

[0009] Furthermore, in the inverter device of the present invention, the retaining member preferably has a receiving cavity, the first core is cylindrical with its axis aligned with the extension direction of the first through hole, the second core is cylindrical with its axis aligned with the extension direction of the second through hole, and the first core and the second core are received in the receiving cavity in such a manner that the extension direction of the first through hole is aligned with the extension direction of the second through hole.

[0010] According to the inverter device of the present invention, the retainer has a housing cavity, the first core is cylindrical with its axis aligned with the extension direction of the first through hole, and the second core is cylindrical with its axis aligned with the extension direction of the second through hole. The first core and the second core are housed in the housing cavity with the extension direction of the first through hole aligned with the extension direction of the second through hole. Therefore, compared with the case where the extension direction of the first through hole and the extension direction of the second through hole are not aligned, it is easier to make the structure more compact. Furthermore, since the first core and the second core are housed in the housing cavity, it is easy to use the retainer to hold the first core and the second core.

[0011] Furthermore, in the inverter device of the present invention, a support body is preferably included, the retaining member having a main body portion, the main body portion being cylindrical with its axis aligned with the extending direction of the first through hole, and constituting the receiving cavity, and a fixing portion connected to the support body is provided on the outer surface of the retaining member.

[0012] The inverter device according to the present invention includes a support body and a retainer having a main body portion. The main body portion is cylindrical with its axis aligned with the extension direction of the first through hole and forms a receiving cavity. A fixing portion connected to the support body is provided on the outer surface of the retainer. Therefore, the first core portion and the second core portion can be conveniently supported on the support body via the retainer, thereby improving assembly efficiency.

[0013] Furthermore, in the inverter device of the present invention, the main body preferably has a support wall and a cover plate, the support wall protruding radially inward from the inner circumferential surface of the main body and supporting the first core and the second core, and the cover plate covering the first core and the second core from the side opposite to the support wall and being detachable relative to the main body.

[0014] According to the inverter device of the present invention, the main body has a support wall and a cover plate. The support wall protrudes radially inward from the inner circumferential surface of the main body and supports the first core and the second core. The cover plate covers the first core and the second core from the side opposite to the support wall and can be attached and detached relative to the main body. Therefore, the first core and the second core can be stably held by the retaining member, and the replacement of the first core and the second core can be conveniently performed.

[0015] Furthermore, in the inverter device of the present invention, it is preferable that the fixing part protrudes from the outer peripheral surface of the main body, the fixing part has a screw hole that extends along the extending direction of the main body, and the retaining member is fixed to the support body by a threaded member passing through the screw hole.

[0016] According to the inverter device of the present invention, the fixing part protrudes from the outer peripheral surface of the main body and has a screw hole that extends along the extension direction of the main body. The retaining member is fixed to the support body by a threaded member passing through the screw hole. Therefore, it is easy to perform the operation of passing the first wire harness and the second wire harness through the first core and the second core and the operation of fixing the retaining member to the support body in the same direction, thereby improving assemblability.

[0017] Furthermore, in the inverter device of the present invention, the support body preferably includes a control board, and one end of the first wiring harness and the second wiring harness are respectively electrically connected to the control board.

[0018] Furthermore, the inverter device of the present invention preferably includes: a connector electrically connected to the other end of the first wiring harness and the second wiring harness respectively; and a frame housing the support and the retainer, and having a through hole for the connector.

[0019] Furthermore, in the inverter device of the present invention, the support body preferably includes a capacitor, the control board is supported on the frame via the capacitor, and the fixing part is fixed to the housing of the capacitor.

[0020] According to the inverter device of the present invention, the support body includes a capacitor, the control board is supported on the frame via the capacitor, and the fixing part is fixed to the housing of the capacitor. Therefore, the retaining member is fixed to the housing of the heavy capacitor, which makes it easier to hold the first core and the second core more stably.

[0021] Furthermore, in the inverter device of the present invention, preferably the first wiring harness is used to transmit signals between the inverter device and an external device, the second wiring harness is used to transmit power between the inverter device and an external power source, the first core is made of a nanocrystal magnetic core, the second core is made of a ferrite magnetic core, and the retaining member is made of resin.

[0022] According to the inverter device of the present invention, the first wiring harness is used to transmit signals between the inverter device and an external device, and the second wiring harness is used to transmit power between the inverter device and an external power source. The first core is made of a nanocrystal magnetic core, the second core is made of a ferrite magnetic core, and the retaining member is made of resin. Therefore, the noise generated when the first and second wiring harnesses transmit signals and power can be effectively suppressed from affecting the surrounding components, and the external noise can be effectively suppressed from affecting the signals transmitted by the first wiring harness and the power transmitted by the second wiring harness.

[0023] (Invention Effects)

[0024] According to the present invention, the wire harness unit includes: a first core having a first through hole for a first wire harness to pass through, and being made of a magnetic material; a second core having a second through hole for a second wire harness to pass through, and being made of a different magnetic material than the first core; and a retaining member that holds the first core and the second core adjacent to each other. Therefore, the retaining member can be used to compactly hold the first wire harness and the second wire harness via the first core and the second core, which helps to achieve a compact structure. Furthermore, the first core and the second core can be constructed with appropriate magnetic materials according to the first wire harness and the second wire harness that are being transmitted, which helps to improve the noise suppression effect. Attached Figure Description

[0025] Figure 1 This is a block diagram schematically illustrating a vehicle control device including an inverter device according to an embodiment of the present invention.

[0026] Figure 2 This is a partial side sectional view schematically illustrating an inverter device according to an embodiment of the present invention.

[0027] Figure 3 This is a perspective view schematically illustrating the holding member included in the inverter device according to an embodiment of the present invention.

[0028] Figure 4 This is a perspective view schematically illustrating the retaining member included in an inverter device according to an embodiment of the present invention, wherein the cover plate is omitted.

[0029] (Symbol Explanation)

[0030] 1. Inverter unit

[0031] 11. Frame

[0032] 111 bottom wall

[0033] 1111 Through hole

[0034] 112 Zhou Bi

[0035] 12 Support body

[0036] 121 capacitor

[0037] 122 Control board

[0038] 13 Wire Harness Units

[0039] 131A First Wiring Harness

[0040] 131B Second Wiring Harness

[0041] 132A First Core

[0042] 1321A First Through Hole

[0043] 132B Second Core

[0044] 1321B Second Through Hole

[0045] 133 Retainer

[0046] 1331 Main Body

[0047] 1332 Fixing part

[0048] 1333 Support Wall

[0049] 1334 Cover Plate

[0050] 1335 Reinforcing Rib

[0051] 14 Connectors

[0052] 2 motors

[0053] 3. Vehicle-side ECU

[0054] 4. Low-voltage power supply

[0055] INV inverter circuit

[0056] UB upper bridge arm

[0057] DB lower bridge arm

[0058] SW switching element

[0059] GDR gate driver

[0060] HP High Voltage Power Supply

[0061] CT Inverter Control Unit

[0062] SP storage compartment

[0063] SP1 First Storage Chamber

[0064] SP2 Second Storage Chamber

[0065] SH screw hole

[0066] SW threaded parts Detailed Implementation

[0067] Below, in conjunction with Figures 1 to 4 The inverter device according to an embodiment of the present invention will be described, wherein, Figure 1 This is a block diagram schematically illustrating a vehicle control device including an inverter device according to an embodiment of the present invention. Figure 2 This is a partial side sectional view schematically illustrating an embodiment of the inverter device of the present invention. Figure 3 This is a perspective view schematically illustrating the holding member included in the inverter device according to an embodiment of the present invention. Figure 4 This is a perspective view schematically illustrating the retaining member included in an inverter device according to an embodiment of the present invention, wherein the cover plate is omitted.

[0068] For ease of explanation, the three mutually orthogonal directions are designated as X, Y, and Z. One side of the X direction is designated as X1, and the other side as X2. One side of the Y direction is designated as Y1, and the other side as Y2. One side of the Z direction is designated as Z1, and the other side as Z2.

[0069] (Electrical structure of the vehicle control unit)

[0070] like Figure 1 As shown, the vehicle control device includes an inverter device 1, a motor 2, a vehicle-side ECU (electronic control unit) 3, and a low-voltage power supply 4.

[0071] Here, as Figure 1 As shown, the inverter device 1 includes an inverter circuit INV, a high-voltage power supply HP, and a control board 122 with an inverter control unit CT. The inverter circuit INV includes multiple switching elements (in the illustrated example, it includes an upper bridge arm UB and a lower bridge arm DB, each of which has three switching elements SW, three diodes, and a gate driver GDR that drives the three switching elements), and supplies power to the motor 2. The high-voltage power supply HP provides a high voltage to the inverter circuit INV, and the inverter control unit CT controls the operation of the inverter circuit INV (the switching elements SW are turned on and off).

[0072] In addition, such as Figure 1 As shown, motor 2 is a three-phase motor.

[0073] In addition, such as Figure 1 As shown, the vehicle-side ECU3 sends a control signal to the inverter control unit CT via the first wiring harness 131A.

[0074] In addition, such as Figure 1As shown, the low-voltage power supply 4 provides low voltage to the inverter control unit CT via the second wiring harness 131B.

[0075] In addition, such as Figure 1 As shown, a retainer 133 is provided midway between the first wire harness 131A and the second wire harness 131B.

[0076] (Mechanical structure of the inverter unit)

[0077] like Figure 2 As shown, the inverter device 1 includes a frame 11, a support 12, and a wiring harness unit 13.

[0078] Here, as Figure 2 As shown, the frame 11 is a box-shaped structure open in the Z1 direction, and includes a bottom wall 111 with a through hole 1111 and a peripheral wall 112 rising from the bottom wall 111 toward the Z1 direction (e.g., the upper side in practice). Furthermore, the frame 11 can be integrally formed with the frame of the motor 2. The opening of the frame 11 (the end of the peripheral wall 112) can also be blocked by a cover.

[0079] In addition, such as Figure 2 As shown, the support 12 is housed in the frame 11 and includes a capacitor 121 and a control substrate 122. The capacitor 121 is supported on the bottom wall 111 of the frame 11, and the control substrate 122 is stacked on the capacitor 121 (in the illustrated example, it is stacked on the Z1 direction side of the capacitor 121) and supported on the frame 11 via the capacitor 121.

[0080] In addition, such as Figure 2 As shown, the wiring harness unit 13 includes: a first wiring harness 131A for transmitting signals; a second wiring harness 131B for transmitting power; a first core 132A having a first through hole 1321A through which the first wiring harness 131A passes, and being made of a magnetic material; a second core 132B having a second through hole 1321B through which the second wiring harness 131B passes, and being made of a different magnetic material than the first core 132A; and a retainer 133 that holds the first core 132A and the second core 132B adjacent to each other.

[0081] In addition, such as Figure 2As shown, one end of the first wiring harness 131A and the second wiring harness 131B are electrically connected to the control board 122, and the other ends of the first wiring harness 131A and the second wiring harness 131B are electrically connected to the connector 14, which engages with the through hole 1111 on the bottom wall 111 of the frame 11. One end of the first wiring harness 131A and the second wiring harness 131B can also be connected to the control board 122 via the connector. Furthermore, the first wiring harness 131A is used to transmit signals between the inverter device 1 and an external device (in the illustrated example, the vehicle-side ECU 3), and the second wiring harness 131B is used to transmit power between the inverter device 1 and an external power source (in the illustrated example, the low-voltage power source 4).

[0082] In addition, such as Figure 2 As shown, the first core 132A and the second core 132B are both cylindrical. The first core 132A is, for example, made of a nanocrystal magnetic core (suitable for suppressing noise in the 150kHz to 5MHz band), and the second core 132B is, for example, made of a ferrite magnetic core (Ni-Zn system; suitable for suppressing noise in the 1MHz to 100MHz band).

[0083] In addition, such as Figure 2 and Figure 4 As shown, the retainer 133 has a receiving cavity SP. The first core 132A is cylindrical with its axis aligned with the extension direction of the first through hole 1321A (in the example shown, it is aligned with the Z direction). The second core 132B is cylindrical with its axis aligned with the extension direction of the second through hole 1321B (in the example shown, it is aligned with the Z direction). (In the example shown, the second core 132B has the same shape as the first core 132A.) The first core 132A and the second core 132B are received in the receiving cavity SP such that the extension direction of the first through hole 1321A is aligned with the extension direction of the second through hole 1321B.

[0084] Specifically, the retainer 133 is made of resin, such as Figures 2 to 4As shown, the main body 1331 is cylindrical with its axis aligned with the extending direction of the first through hole 1321A and the second through hole 1321B, and forms a storage cavity SP (in the illustrated example, the storage cavity SP includes a cylindrical first storage cavity SP1 and a cylindrical second storage cavity SP2, the first storage cavity SP1 and the second storage cavity SP2 are separate from each other, the first storage cavity SP1 is used to store the first core 132A, and the second storage cavity SP2 is used to store the second core 132B, but the first storage cavity SP1 and the second storage cavity SP2 may also be formed to be connected to each other). A fixing part 1332 connected to the support body 12 is provided on the outer surface of the main body 1331. Furthermore, the main body 1331 has a support wall 1333 and a cover plate 1334. The support wall 1333 protrudes radially inward from the inner circumferential surface of the main body 1331 (in the illustrated example, it is integrally formed with the main body 1331) and supports the first core 132A and the second core 132B. The cover plate 1334 covers the first core 132A and the second core 132B from the side opposite to the support wall 1333 (in the illustrated example, it is the Z1 direction side) and can be attached and detached relative to the main body 1331 (in the illustrated example, the cover plate 1334 and the support wall 1333 abut against the first core 132A and the second core 132B from both sides in the Z direction, but it is not limited to this). It also has through holes through which the first wire harness 131A and the second wire harness 131B pass respectively. Furthermore, the fixing part 1332 protrudes from the outer peripheral surface of the main body 1331 (in the illustrated example, it is a plate-shaped protrusion towards the X1 direction). The fixing part 1332 has screw holes SH (in the illustrated example, two are provided separately along the Y direction, but it is not limited to this). The screw holes SH extend along the extending direction of the main body 1331. The retaining member 133 is fixed to the support body 12 by a threaded member SW passing through the screw holes SH (in the illustrated example, the fixing part 1332 is fixed to the housing of the capacitor 121). The retaining member 133 also has reinforcing ribs 1335, which connect the fixing part 1332 to the main body 1331 (in the illustrated example, the reinforcing ribs 1335 are provided between the two screw holes SH, but it is not limited to this).

[0085] (Main effects of this implementation method)

[0086] According to this embodiment, in the inverter device 1, the wiring harness unit 13 includes: a first core 132A having a first through hole 1321A through which a first wiring harness 131A passes, and being made of a magnetic material; a second core 132B having a second through hole 1321B through which a second wiring harness 131B passes, and being made of a different magnetic material than the first core 1321A; and a retaining member 133 holding the first core 1321A and the second core 1321B adjacent to each other. Therefore, the first wiring harness 131A and the second wiring harness 131B can be compactly held by the retaining member via the first core 1321A and the second core 1321B, which helps to achieve a compact structure. Furthermore, the first core 132A and the second core 132B can be constructed with appropriate magnetic materials according to the different transmission objects of the first wiring harness 131A and the second wiring harness 131B, which helps to improve the noise suppression effect.

[0087] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above embodiments.

[0088] For example, in the above embodiment, the inverter device 1 is applied to a vehicle control device, but it is not limited to this and can also be applied to other applications (e.g., an air conditioner). Similarly, in the above embodiment, the wiring harness unit 13 can also be applied to applications other than the inverter device 1.

[0089] Furthermore, in the above embodiments, the first wire harness 131A is used to transmit signals and the second wire harness 131B is used to transmit power, but it is not limited to this. For example, the first wire harness 131A is used to transmit weak current and the second wire harness 131B is used to transmit large current.

[0090] Furthermore, in the above embodiments, in addition to including the first wire harness 131A and the second wire harness 131B, more wire harnesses may be included. In this case, it is preferable to also include a core made of magnetic material corresponding to the more wire harnesses.

[0091] Furthermore, in the above embodiment, the first core 132A is made of a nanocrystal magnetic core and the second core 132V is made of a ferrite magnetic core, but it is not limited to this. The first core 132A and the second core 132V can be appropriately selected according to the noise that needs to be suppressed.

[0092] Furthermore, in the above embodiments, the second core 132B has the same shape as the first core 132A, but it is not limited to this; the second core 132B and the first core 132A may also be formed in different shapes.

[0093] Furthermore, in the above embodiment, the first core portion 132A and the second core portion 132B are held in the retainer 133 in such a way that the extending direction of the first through hole 1321A is consistent with the extending direction of the second through hole 1321B. However, this is not limited to this. For example, the first core portion 132A and the second core portion 132B may also be held in the retainer 133 in such a way that the extending direction of the first through hole 1321A is intersected with the extending direction of the second through hole 1321B.

[0094] Furthermore, in the above embodiment, the cover plate 1334 covers the first core 132A and the second core 132B from the side opposite to the support wall 1333, but it is not limited to this. The support wall 1333 may also be omitted and the cover plate 1334 may be used to cover the first core 132A and the second core 132B from both sides of the axial direction of the main body 1331.

[0095] Furthermore, in the above embodiment, the retainer 133 is made of resin and has a main body 1331, a fixing part 1332, a support wall 1333 and a cover plate 1334. The main body 1331 has a receiving cavity SP for receiving the first core 132A and the second core 132B, but it is not limited to this. The material and specific structure of the retainer 133 can be appropriately changed as needed. For example, the retainer 133 can also be formed as a plate and a through hole or groove can be provided on the retainer 133 for the first wire harness 131A and the second wire harness 131B to pass through.

[0096] It should be understood that within the scope of this invention, the various parts of the embodiments can be freely combined, or the various parts of the embodiments can be appropriately modified or omitted.

Claims

1. An inverter device characterized by comprising a harness unit and a support body, the harness unit includes: a first harness for transmitting a first object; a second harness for transmitting a second object different from the first object; a first core having a first through-hole through which the first harness passes, and composed of a magnetic material; a second core having a second through-hole through which the second harness passes, and composed of a magnetic material different from the first core; and a holder that holds the first core and the second core adjacent to each other, the holder has a receiving cavity, the first core is in a cylindrical shape with an axis coinciding with the extending direction of the first through-hole, the second core is in a cylindrical shape with an axis coinciding with the extending direction of the second through-hole, the first core and the second core are received in the receiving cavity in a manner that the extending direction of the first through-hole coincides with the extending direction of the second through-hole, the holder has a main body portion in a cylindrical shape with an axis coinciding with the extending direction of the first through-hole, and constituting the receiving cavity, a fixing portion connected to the support body is provided on the outer surface of the holder.

2. The inverter device according to claim 1, characterized in that the main body portion has a support wall and a cover plate, the support wall protrudes from the inner peripheral surface of the main body portion toward the radial inner side, and supports the first core and the second core, the cover plate covers the first core and the second core from the side opposite to the support wall, and is detachable with respect to the main body portion.

3. The inverter device according to claim 1, characterized in that the fixing portion protrudes from the outer peripheral surface of the main body portion, the fixing portion has a screw hole extending in the extending direction of the main body portion, the holder is fixed to the support body by a screw member passing through the screw hole.

4. The inverter device according to claim 1, characterized in that the support body includes a control substrate, one end of each of the first harness and the second harness is electrically connected to the control substrate. including:

5. The inverter apparatus of claim 4, wherein a connector electrically connected to the other end of each of the first harness and the second harness; and a frame body that receives the support body and the holder, and has a through-hole in which the connector is disposed.

6. The inverter device according to claim 5, characterized in that the support body includes a capacitor, the control substrate is supported on the frame body via the capacitor, the fixing portion is fixed to the housing of the capacitor.

7. The inverter device according to claim 1, characterized in that the first harness is for transmitting a signal between the inverter device and an external device, the second harness is for transmitting electric power between the inverter device and an external power supply, the first core is composed of a nanocrystalline magnetic core, the second core is composed of a ferrite magnetic core, the holder is made of resin. ​ ​

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