Electrical transmission device, inverter, electric drive system and vehicle

Abstract

The present disclosure relates to an electrical transmission device (10) comprising a seal (100) comprising a body portion (110) comprising a first side (111), a second side (112) opposite to the first side, and a through hole (130) extending from the first side (111) to the second side (112), and a wire harness (200) comprising at least one wire (220) extending through the through hole (130) of the seal (100). The present disclosure realizes a modular electrical transmission device, which can adjust its components as needed to adapt to different working environments and has good sealing performance. The present disclosure also relates to an inverter comprising the aforementioned electrical transmission device, an electric drive system comprising the aforementioned inverter, and a vehicle comprising the aforementioned electric drive system.

Description

Technical Field

[0001] This disclosure relates to electrical transmission devices, and more particularly to electrical transmission devices for inverters in electric drive systems of motor vehicles. This disclosure also relates to inverters including said electrical transmission devices. Furthermore, this disclosure also relates to electric drive systems and vehicles. Background Technology

[0002] New energy vehicles have become widely popular and applied in recent years, which has led to increasingly higher demands on vehicle control and handling performance. Stable and efficient vehicle control and handling performance is inseparable from the electrical transmission between various vehicle components, especially signal transmission. Electrical transmission must be able to withstand relatively harsh environmental conditions to provide stable electrical transmission performance.

[0003] A typical example involves signal transmission between the inverter and the motor, core components of a vehicle. First, the low-voltage signal from the motor's resolver is transmitted to the inverter's main control chip via a signal transmission device, enabling the inverter to monitor the motor's operating status in real time. Then, the inverter provides the signal to the vehicle system, which makes a decision and sends a control signal to the inverter. Finally, the inverter sends the control signal to the motor via the signal transmission device, thereby controlling the motor's operation. Because the signal transmission device transmits electrical signals between the motor and the inverter, its structure on the motor side, such as the resolver signal acquisition structure located in the motor junction box, will be subjected to more severe environmental conditions, such as high temperatures, exposure to oil or water depending on the motor's lubrication method, susceptibility to corrosion, and susceptibility to interference—all factors that degrade the performance of the electrical transmission device. Furthermore, due to the high integration of vehicle components, the motor and inverter may be integrated into a shared housing, and these adverse factors may also affect the inverter's performance.

[0004] Furthermore, the signal transmission structure on the inverter side typically uses fixed signal transmission connectors, which often occupy a large space, hindering component miniaturization. Moreover, compared to water-cooled motors, the increasingly popular oil-cooled motors require larger transmission connectors to prevent the aforementioned adverse factors from affecting the inverter side. Therefore, installing such transmission connectors requires reserving a large space at the motor junction box. This further increases the size of the transmission device, failing to meet the industry's requirements for integration and miniaturization. Moreover, at least a large portion of the transmission connector structure often needs to be redesigned and customized for different motors and inverters, and different operating environments, resulting in high costs.

[0005] Therefore, there is a need for an electrical transmission device that is small in size, highly adaptable, has its components that can be flexibly adjusted to adapt to different working environments, and has good heat resistance, water / oil resistance, and anti-interference performance. Summary of the Invention

[0006] Therefore, this disclosure aims to provide an electrical transmission device that solves the above-mentioned problems. The electrical transmission device according to this disclosure has a highly adaptable modular structure, allowing for flexible configuration of components according to different usage environment requirements, without the need to redesign and manufacture the entire electrical transmission device, thereby saving manpower and manufacturing costs.

[0007] The electrical transmission device according to this disclosure includes: a seal, the seal including a body portion including a first side, a second side opposite to the first side, and a through hole extending from the first side to the second side; and a wire harness including at least one wire extending through the through hole of the seal.

[0008] The electrical transmission device disclosed herein achieves a flexible and highly adaptable modular structure. This modular structure includes a seal and a wiring harness with wires extending through the seal. Therefore, the required sealing material can be selected to manufacture the seal according to different operating environments, such as oil-cooled or water-cooled motors, and the wires can be selected according to the electrical transmission requirements, eliminating the need to redesign and customize the entire electrical transmission device for each motor and inverter. For example, when facing different environmental sealing requirements, the seal can be replaced to meet the needs; while when facing similar environmental sealing requirements but different electrical transmission requirements, only the wiring harness needs to be replaced. This achieves a highly adaptable and well-sealed modular electrical transmission device.

[0009] The electrical transmission apparatus according to this disclosure may also have one or more of the following features, individually or in combination.

[0010] According to one embodiment of this disclosure, the inner wall of the through hole is provided with an annular protrusion. The annular protrusion can fit tightly with the insulating sheath of the wire to form a sealing fit between the inner wall of the through hole and the wire.

[0011] According to one embodiment of this disclosure, the inner wall of the through hole is provided with a plurality of annular protrusions arranged along the extending direction of the through hole. The construction of the plurality of annular protrusions realizes a multi-layer sealing structure between the wire and the through hole.

[0012] According to one embodiment of this disclosure, the main body includes an outwardly projecting nozzle portion aligned with the through-hole. The nozzle portion serves to receive a wire, guide it during installation, and provide better support and protection. Furthermore, friction between the inner wall of the nozzle portion and the insulating sheath of the wire prevents the wire from dislodging.

[0013] According to one embodiment of this disclosure, the inner wall of the orifice portion includes an expansion section at its free end to allow for easy insertion of the wire even if the wire is not precisely aligned.

[0014] According to one embodiment of this disclosure, the seal includes a first flange that projects radially from the body portion, and the thickness of the first flange is less than the thickness of the body portion.

[0015] According to one embodiment of this disclosure, the seal further includes a second flange projecting radially from the body portion, the second flange being located between and spaced apart from the first flange and the second side. When installed in place, the first flange and the second flange are located on opposite sides of the housing, engaging the housing and positioning the seal.

[0016] According to one embodiment of this disclosure, the material of the seal includes an elastic material.

[0017] According to one embodiment of this disclosure, the electrical transmission device is a low-voltage signal transmitter.

[0018] This disclosure also relates to an inverter comprising: an inverter housing having an opening; and an electrical transmission device as described above, wherein a seal of the electrical transmission device is fitted into the opening in a sealing manner.

[0019] According to one embodiment of this disclosure, the orifice connects to the inverter cavity and the motor cavity.

[0020] According to one embodiment of this disclosure, the inverter further includes a clamping device that presses the seal against the inverter housing. In this manner, continuous pressure on the seal can be maintained during inverter operation to ensure sealing performance.

[0021] According to one embodiment of this disclosure, the clamping device is fixed to the inverter housing.

[0022] This disclosure also relates to an electric drive system that includes the inverter as described above.

[0023] Furthermore, this disclosure also relates to a vehicle including the electric drive system as described above. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The following drawings are not intentionally drawn to scale to actual size; their focus is on illustrating the main points of this disclosure.

[0025] Figure 1 This is a schematic perspective view of the electrical transmission device according to this disclosure in its installed position, showing its state as viewed from one side of the cavity;

[0026] Figure 2 This is a schematic perspective view of the electrical transmission device according to the present disclosure in its installed position, showing its state when viewed from the other side of the cavity;

[0027] Figure 3 The schematic perspective view of the electrical transmission device according to this disclosure shows the first side of the main body portion of the seal;

[0028] Figure 4 The schematic perspective view of the electrical transmission device according to this disclosure shows the second side of the main body portion of the seal;

[0029] Figure 5 This is a schematic cross-sectional view of the electrical transmission device according to this disclosure in its installation position;

[0030] Figure 6 This is a schematic perspective sectional view of an electrical transmission apparatus according to the present disclosure, excluding wiring harnesses;

[0031] Figure 7 This is a schematic cross-sectional view of an electrical transmission apparatus according to the present disclosure, without showing the wiring harness;

[0032] Figure 8 This is a schematic cross-sectional view of the electrical transmission device according to the present disclosure, showing the state in which the wire harness is assembled in the seal;

[0033] Figure 9 This is a schematic perspective view of an electrical transmission device according to this disclosure in its installation position, wherein the clamping device is not applied; and

[0034] Figure 10 It is a schematic three-dimensional diagram of the clamping device.

[0035] In all the accompanying drawings, the same or similar parts are indicated by the same number. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The use of terms such as “a,” “an,” or “the” in this patent application specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Although expressions such as “first” and “second” are used to describe the various elements of this disclosure, they are used only to distinguish one component from another and are not intended to limit the order or importance of the respective elements. Without departing from the scope of this disclosure, “first element” may be written as “second element,” and similarly, “second element” may be written as “first element.” Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0038] For ease of description, the accompanying drawings of this disclosure have correspondingly simplified or omitted components commonly used in the art, such as external connecting lines and other components unrelated to the description of this disclosure. These omitted or simplified components do not affect a person skilled in the art's understanding of the content of this disclosure.

[0039] Figure 1 and Figure 2 A schematic perspective view illustrates an electrical transmission device 10 according to an exemplary embodiment of the present disclosure. The electrical transmission device 10 is, for example, part of a vehicle inverter. The inverter, for example, is part of a vehicle electric drive system capable of converting direct current (DC) power supplied by the vehicle's power supply equipment into alternating current (AC) power to drive a motor. Figure 1The image shows an inverter housing 20, which houses the inverter's components, including circuit boards, busbars, and various electronic components, and isolates these components from the external environment to prevent them from being adversely affected or interfered with. The motor is housed within a motor cavity formed by the motor housing. Due to integration requirements, the inverter housing 20 can, for example, be integrally formed with the motor housing; that is, the inverter and motor use a shared housing, but are separated by partition walls to form the inverter cavity and the motor cavity. Since signal transmission is required between the vehicle's inverter and motor, an electrical transmission device is needed to perform this function; that is, the electrical transmission device needs to transmit signals across the inverter cavity and the motor cavity. However, due to the specific requirements of the motor cavity and the inverter cavity, higher demands are placed on the construction and performance of the electrical transmission device. For example, the motor housing can house oil cooling or water cooling systems to cool the motor. The inverter housing requires protection of its electronic components from oil and water, and also needs to be free from interference. Therefore, high sealing performance is required between the housings. Furthermore, different cooling types of motors have different sealing requirements, making it difficult to use standardized seals. The electrical transmission device 10 of this disclosure solves these technical problems. In one example of this disclosure, the electrical transmission device 10 is a low-voltage signal transmitter that transmits signals between the inverter and the motor.

[0040] like Figure 1 and 2 As shown, the electrical transmission device 10 according to this disclosure includes a seal 100 and a wiring harness 200. The electrical transmission device 10 is mounted on an inverter housing 20. For example, the inverter housing 20 may include an aperture 21 ( Figure 5 The sealing element 100 of the electrical transmission device 10 is fitted into the orifice 21 in a sealed manner. Figure 1 and Figure 2 The electrical transmission device 10 is shown from both the inverter cavity side and the motor cavity side, in conjunction with... Figure 5 As shown, the orifice 21 connects the inverter cavity and the motor cavity. For example, in the case where the inverter and motor share a housing, the orifice 21 can be formed in the partition wall between the inverter cavity and the motor cavity. Thus, the seal 100 isolates the motor cavity from the inverter cavity, providing a good seal for the inverter cavity. The installation of the electrical transmission device 10 in the inverter will be described in detail below.

[0041] The electrical transmission device 10 according to this disclosure will now be described in detail.

[0042] like Figure 3 and Figure 4As shown, the seal 100 of the electrical transmission device 10 includes a body portion 110. The body portion 110 may include a first side 111 and a second side 112 opposite to the first side 111. For example, the first side 111 and the second side 112 of the body portion 110 may have generally flat surfaces and may define a thickness of the body portion 110 between the first side 111 and the second side 112. In this document, "thickness" means length along the direction from the first side 111 to the second side 112 of the body portion 110. When the seal is installed in the inverter housing 20, the peripheral portion with thickness between the first side 111 and the second side 112 may sealably engage the inner edge of the opening 21 of the inverter housing 20 to isolate the inverter cavity from the motor cavity.

[0043] The seal 100 may be made of an elastic material, thereby enabling it to compress against and fit tightly against the housing or component it is assembled with, achieving a good seal. The elastic material included in the seal also facilitates and simplifies the installation of the electrical transmission device 10.

[0044] Also refer to Figures 5 to 7 The main body 110 includes a through hole 130 extending from a first side 111 to a second side 112. The wire harness 200 may include at least one wire 220. Interface devices are provided at both ends of the wire harness 200. Figure 3 and Figure 4 The diagram illustrates a first interface device 231 and a second interface device 232. In an example of signal transmission between a motor and an inverter, the interface devices include an interface device connected to the inverter and an interface device connected to the motor. For example, in this case, the first interface device 231 is the interface device connected to the inverter, and the second interface device 232 is the interface device connected to the motor.

[0045] The wire 220 passes through the corresponding through hole 130, and the wire 220 extends a certain length beyond the first side 111 and the second side 112 of the main body 110 to achieve a "spinning" method. Compared with the fixed connectors used in the prior art, the interface position of the electrical transmission device according to this disclosure is more flexible, thereby adapting to different interface positions on the motor side.

[0046] The electrical transmission device 10 disclosed herein achieves a flexible and highly adaptable modular structure, which includes a seal and a wiring harness with wires extending through the seal. Thus, the required sealing material (e.g., different oil resistance, water resistance, and corrosion resistance) can be selected to manufacture the seal according to different operating environments, such as oil-cooled motors or water-cooled motors, and the wires can be selected according to the needs of electrical transmission. There is no need to redesign and customize the entire electrical transmission device for each motor and inverter, thereby saving manufacturing costs and manpower.

[0047] Now for reference Figure 6 , Figure 7 and Figure 8 The seal 100 of the electrical transmission device 10 according to this disclosure will be described in detail below. Figure 6 A cross-section of the seal 100 along a plane is shown, in which the longitudinal extension direction 130L of the two through holes 130 lies in the plane, to show the internal structure of the through holes 130.

[0048] As shown in the figure, the first side 111 and the second side 112 of the main body portion 110 of the seal 100 may have principal planes that are parallel to each other. It should be understood that the principal planes of the first side 111 and the second side 112 may also not be parallel to each other. The through hole 130 in the main body portion 110 may be a through hole perpendicular to the first side 111 and the second side 112, as shown in the figure, but it may also be provided with a through hole at a certain angle or in other forms depending on the needs of the cavity in which the first side 111 and the second side 112 are located.

[0049] The number of through holes 130 matches the number of wires 220 in the wire harness 200.

[0050] exist Figures 6 to 8 In the illustrated embodiment, the inner wall of the through hole 130 may be provided with an annular protrusion 132. When the wire 220 passes through the through hole 130, the annular protrusion 132 and the insulating jacket of the wire 220 are tightly fitted together in the entire circumferential direction to form a sealing structure between the inner wall of the through hole 130 and the wire 220. Therefore, a sealing structure is formed not only between the seal 100 and the housing, but also between the seal and the wire harness, thereby ensuring the sealed isolation between the cavities on both sides of the seal 100. The "annular surface" formed by the annular protrusion 132 may be approximately perpendicular to the extension direction 130L of the through hole 130.

[0051] Furthermore, the inner wall of the through hole 130 may be provided with a plurality of annular protrusions 132, which are arranged along the extending direction 130L of the through hole 130, such as... Figures 6 to 8 As shown. This achieves a multi-layered sealing structure to enhance the sealing performance between the through-hole 130 and the wire 220. The annular protrusion 132 can apply a certain pressure to the insulating jacket of the wire 220; for example, the annular protrusion 132 can be slightly compressed and deformed to fit tightly against the insulating jacket of the wire 220. In one embodiment, these annular protrusions 132 can be parallel to each other and spaced apart along the extension direction 130L of the through-hole 130. The annular protrusions 132 can be spaced apart from each other at a uniform interval, as shown in the figure.

[0052] In one embodiment, the body portion 110 of the seal 100 includes an outwardly projecting port portion 140 aligned with a corresponding through hole 130 to allow the wire 220 to pass through the corresponding through hole 130 and the port portion 140. In the example shown, the port portion 140 protrudes outward from a first side 111 of the body portion 110 of the seal 100, has a tubular shape, and is open outward. The port portion 140 serves to receive the wire 220, guides the installation of the wire 220, and provides better support and protection for the wire 220. Friction is generated between the inner wall of the port portion 140 and the wire 220 to prevent the wire 220 from dislodging.

[0053] It should be understood that a nozzle portion may also be provided on the second side 112 of the main body 110.

[0054] When the seal does not have an opening (e.g., in...) Figure 7 and Figure 8 In the case shown, since there is no nozzle portion on the second side 112 of the main body 110, the wire harness extending from this side can occupy a smaller volume of space.

[0055] The nozzle portion 140 and the corresponding through hole 130 may have the same extension direction 130L, so that when the wire 220 is inserted from the nozzle portion 140, it can be smoothly inserted to the other side of the main body 110, which facilitates operation and installation.

[0056] In one embodiment, the wire 220 is accommodated within the nozzle portion 140 in an interference fit with the inner wall of the nozzle portion 140, for example, as shown in the figure. Figure 8 As shown, the conductor 220 can be interference-fitted with at least a portion of the inner wall of the nozzle portion 140. In this way, a sealing structure is formed between the inner wall of the nozzle portion 140 and the insulating jacket of the conductor 220, further enhancing the sealing performance of the electrical transmission device 10.

[0057] Furthermore, to facilitate wire insertion, the inner wall of the conduit portion 140 may include an expansion section 141 at its free end, such as... Figure 6 and Figure 7 As shown. An expansion section 141 is provided at the inner edge of the free end of the nozzle portion 140, tapering inwards from the free end toward the interior of the nozzle portion 140, thereby defining an expansion section from the inside out at the opening of the nozzle portion 140. The expansion section 141 may have a flared shape to allow the wire to be inserted into the nozzle portion 140 even without precise alignment.

[0058] To facilitate the assembly of the electrical transmission device 10, in one embodiment, and as... Figure 6 and 7As shown, the seal 100 includes a first flange 160 projecting radially from the body portion 110, and the thickness of the first flange 160 is less than the thickness of the body portion 110. It should be understood that the body portion 110 of the seal 110 does not necessarily have a circular overall shape; here, "radial" means an orientation outward from the central region of the body portion 110. Figure 5 Taking the illustrated embodiment as an example, when installing the electrical transmission device 10, the radial edge of the main body 110 of the seal 100 can be pressed to compress it, and then the second side 112 of the main body 110 is inserted into the corresponding orifice 21. The first flange 160 can then sit on the housing portion surrounding the orifice 21, preventing the seal 100 from falling out of the orifice as a whole. Furthermore, since the thickness of the first flange 160 is less than the thickness of the main body 110, the portion not occupied by the first flange 160 along the thickness direction either falls into the orifice 21 or protrudes through the orifice 21 from the other side of the housing 20.

[0059] In a preferred embodiment, the seal 100 further includes a second flange 170 that projects radially from the body portion 110, such as Figure 5 and Figure 6 As shown, the second flange 170 is located between and spaced apart from the first flange 160 and the second side 112. This defines a circumferential groove 180 between the first flange 160 and the second flange 170. This circumferential groove 180 is used to receive a portion of the housing surrounding the opening 21. In one example, the thickness of the circumferential groove 180 is set such that the first flange 160 and the second flange 170 engage on both sides of the housing portion, or even come into close contact, thereby ensuring the sealing capability of the electrical transmission device 10.

[0060] In one embodiment, for example, Figure 5 and Figure 6 As shown, the diameter of the second flange 170 is smaller than that of the first flange 160, which facilitates the installation of the electrical transmission device 10 from one side of the second flange 170.

[0061] Figure 9 The diagram illustrates the configuration of the electrical transmission device 10 according to this disclosure when it is installed within the inverter housing 20. To achieve better sealing of the electrical transmission device 10 to withstand more demanding environmental conditions, the inverter may further include a clamping device 30, such as... Figure 10 As shown. When the electrical transmission device 10 is installed in the orifice 21, the clamping device 30 presses the seal 100 to press the seal 100 against the inverter housing 20. For example, the clamping device 30 may have a protrusion 31 facing the first flange 160 of the seal 100, such as a circumferentially closed annular protrusion, to apply pressure to the first flange 160 through the protrusion 31, so that the surface 162 of the defining groove 180 of the first flange 160 ( Figure 7It abuts against the inverter housing 20. The first flange 160 may be deformed due to the pressure of the clamping device 30.

[0062] In one embodiment, the clamping device 30 is fixed to the inverter housing 20 to maintain continuous pressure on the seal 100 during inverter use to ensure sealing performance. For example, the clamping device 30 has a mounting lug 32 with a threaded hole, and a corresponding mounting boss 22 with a threaded hole corresponding to the threaded hole of the mounting lug 32 is provided inside the inverter housing 20. The mounting lug 32 and the mounting boss 22 are then fixed together by bolts (not shown), thereby fixing the clamping device 30 to the inverter housing.

[0063] The electrical transmission device according to this disclosure can be used as part of an inverter in the electric drive system of a vehicle. The vehicle can be an electrified vehicle, such as a battery electric vehicle (BEV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a range-extended electric vehicle (REEV), or a fuel cell electric vehicle (FCEV). The vehicle can also be a hydrogen fuel cell vehicle.

[0064] Certain features, structures, or characteristics in one or more embodiments of this disclosure may be appropriately combined.

[0065] The foregoing description is illustrative of the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the foregoing description is illustrative of the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of this disclosure.

Claims

1. An electrical transmission device (10), comprising: A sealing element (100) comprising a body portion (110) including a first side (111), a second side (112) opposite to the first side, and a through hole (130) extending from the first side (111) to the second side (112); and The wiring harness (200) includes at least one conductor (220) that extends through a through-hole (130) of the seal (100).

2. The electrical transmission device (10) as claimed in claim 1, wherein, The inner wall of the through hole (130) is provided with an annular protrusion (132).

3. The electrical transmission device (10) as claimed in claim 2, wherein, The inner wall of the through hole (130) is provided with a plurality of annular protrusions (132) arranged along the extension direction of the through hole (130).

4. The electrical transmission device (10) as claimed in claim 1, wherein, The main body (110) includes an outwardly protruding port portion (140) that is aligned with the through hole (130).

5. The electrical transmission device (10) as claimed in claim 4, wherein, The inner wall of the nozzle portion (140) includes an expansion section (141) at its free end.

6. The electrical transmission device (10) as claimed in any one of claims 1 to 5, wherein, The seal (100) includes a first flange (160) that protrudes radially from the body portion (110), and the thickness of the first flange (160) is less than the thickness of the body portion (110).

7. The electrical transmission device (10) as claimed in claim 6, wherein, The seal (100) further includes a second flange (170) that protrudes radially from the body portion (110), the second flange (170) being located between the first flange (160) and the second side (112) and spaced apart from the first flange (160).

8. The electrical transmission device (10) as claimed in any one of claims 1 to 5, wherein, The material of the seal includes an elastic material.

9. The electrical transmission device (10) as claimed in any one of claims 1 to 5, wherein, The electrical transmission device (10) is a low-voltage signal transmitter.

10. An inverter, comprising: Inverter housing (20), the inverter housing includes an opening (21); as well as The electrical transmission device (10) according to any one of claims 1 to 9, wherein the seal of the electrical transmission device (10) is fitted into the orifice (21) in a sealing manner.

11. The inverter of claim 10, wherein, The orifice (21) connects the inverter cavity and the motor cavity.

12. The inverter as claimed in claim 10 or 11, wherein, The inverter also includes a clamping device (30) that presses the seal (100) against the inverter housing (20).

13. The inverter of claim 12, wherein, The clamping device (30) is fixed to the inverter housing (20).

14. An electric drive system comprising an inverter as claimed in any one of claims 10 to 13.

15. A vehicle comprising the electric drive system as claimed in claim 14.

Images