Electric drive components and vehicles

Abstract

An embodiment of the present invention provides an electric drive assembly and a vehicle, wherein the electric drive assembly includes a motor, a controller and a connector, wherein the motor is provided with a first connecting portion, the controller is electrically connected to the motor, the controller is provided with a second connecting portion, and the connector is connected to the first connecting portion and the second connecting portion. At least one of the first connecting portion and the second connecting portion is provided with an insulating layer, and the connector abuts against the insulating layer. In this way, the insulating layer helps to block the circuit of the common mode current between the motor and the controller, helps to prevent the common mode current from circulating in the loop between the motor and the controller, helps to prevent the shaft current from flowing inside the bearing of the motor, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor, and helps to increase the service life of the bearing of the motor. In addition, the way in which the motor and the controller block the shaft current is simple, which facilitates manufacturing while helping to improve the reliability of the operation of the electric drive assembly.

Description

Technical Field

[0001] The present invention relates to the field of electric drive technology, and in particular to an electric drive component and a vehicle. Background Art

[0002] With the rapid development of electric vehicles, the application of motor controllers has developed rapidly and gradually tended to be integrated, high-voltage, and high-power designs. With the promotion of the application of silicon carbide (SiC) power modules, the switching frequency of pulse width modulation inverters (PWM) and the bus voltage have gradually increased, and the common-mode noise generated by the inverter has continued to increase. The common-mode current generated by the inverter when it is working will induce shaft voltage on the motor shaft through the coupling capacitor formed inside the motor. When the drive system is running, once the amplitude of the shaft voltage is greater than the threshold voltage that the bearing oil film can withstand, the oil film will break down, and a shaft current will be formed in the loop formed by parasitic capacitance inside the motor, causing electrical discharge machining (EDM) or high-frequency loop current in the bearing, resulting in severe electrical corrosion of the bearing, abnormal noise, and even safety problems.

[0003] Therefore, how to reduce shaft current and avoid EDM breakdown of motor bearings has become a focus of more and more attention. Summary of the invention

[0004] The embodiments of the present invention provide an electric drive assembly or a vehicle to improve at least one of the above technical problems.

[0005] The embodiments of the present invention achieve the above-mentioned purpose through the following technical solutions.

[0006] In a first aspect, an embodiment of the present invention provides an electric drive assembly, the electric drive assembly comprising a motor, a controller and a connector, the motor is provided with a first connector, the controller is electrically connected to the motor, and the controller is provided with a second connector. The connector is connected to the first connector and the second connector, at least one of the first connector and the second connector is provided with an insulating layer, and the connector abuts against the insulating layer.

[0007] In some embodiments, the connecting member includes a motor connecting portion and a controller connecting portion that are opposite to each other, the motor connecting portion is interference fit with the first connecting portion, and the controller connecting portion is interference fit with the second connecting portion.

[0008] In some embodiments, the first connection part is provided with an insulating layer, the motor connection part abuts against the insulating layer, the controller connection part is connected to the second connection part, and the dimension of the insulating layer along the height direction of the connector is greater than the dimension of the first connection part along the height direction.

[0009] In some embodiments, the insulating layer includes a first insulating layer and a second insulating layer connected to each other, the first insulating layer extends in the height direction and is located between the first connecting part and the motor connecting part, the second insulating layer is located on the side of the first connecting part facing the second connecting part, and the second insulating layer extends in the length direction of the connecting member and connects the first connecting part and the motor connecting part respectively.

[0010] In some embodiments, the second connection part is provided with an insulating layer, the controller connection part abuts against the insulating layer, the motor connection part is connected to the first connection part, and the dimension of the insulating layer along the height direction of the connection piece is larger than the dimension of the first connection part along the height direction.

[0011] In some embodiments, the controller connecting part includes a head and a connecting part connected to each other, the insulating layer includes a third insulating layer and a fourth insulating layer connected to each other, the third insulating layer extends in the height direction and is located between the second connecting part and the connecting part, and the fourth insulating layer extends in the length direction of the connector and is located between the second connecting part and the head.

[0012] In some embodiments, the insulating layer further includes a fifth insulating layer, which is connected to a side of the third insulating layer facing away from the fourth insulating layer, and the fifth insulating layer extends along a length direction and is respectively connected to the second connecting portion and the connecting portion.

[0013] In some embodiments, both the first connection portion and the second connection portion are provided with an insulating layer, and both the motor connection portion and the controller connection portion are in contact with the insulating layer.

[0014] In some embodiments, the insulating layer is insulating glue.

[0015] In a second aspect, an embodiment of the present invention provides a vehicle, the vehicle comprising a vehicle body and an electric drive assembly provided by any one of the above embodiments, wherein the electric drive assembly is mounted on the vehicle body.

[0016] The electric drive assembly and vehicle provided by the embodiment of the present invention include a motor, a controller and a connector, and the controller is electrically connected to the motor. The motor is provided with a first connecting portion, the controller is provided with a second connecting portion, and the connector is connected to the first connecting portion and the second connecting portion, so that the connector helps to ensure the stability of the connection between the motor and the controller, and helps to improve the compactness of the structure of the electric drive assembly. At least one of the first connecting portion and the second connecting portion is provided with an insulating layer, and the connector abuts against the insulating layer. In this way, the insulating layer helps to block the circuit of the common mode current between the motor and the controller, helps to avoid the common mode current circulating in the loop between the motor and the controller, and helps to avoid the shaft current flowing inside the bearing of the motor, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor, and helping to improve the service life and mechanical durability of the bearing of the motor. And because the insulating layer blocks the circuit of the common mode current between the motor and the controller, the motor and the controller will not form a common mode current closed loop, which helps to avoid heating of the electric drive assembly and helps to improve the reliability of the operation of the electric drive assembly. In addition, the way in which the motor and the controller block the shaft current is simple and convenient to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic structural diagram of an electric drive assembly provided in an embodiment of the present invention is shown.

[0019] Figure 2 Shows Figure 1 A schematic structural diagram of the connection between the first connecting part, the second connecting part and the connecting piece of the electric drive system.

[0020] Figure 3 An equivalent circuit diagram of an electric drive assembly of the related art is shown.

[0021] Figure 4 Shows Figure 1 Equivalent circuit diagram of the electric drive components.

[0022] Figure 5 Shows Figure 2 A schematic longitudinal cross-sectional view of the connection between the first connection part, the second connection part and the connection piece of the electric drive system.

[0023] Figure 6 A schematic structural diagram of a vehicle provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the electric drive system of related technology, the reduction of shaft current generally starts from the excitation source of the shaft current, and measures are taken from the control strategy to minimize the common-mode voltage. For example, EDM damage can be alleviated by adding conductive brushes. However, the conductive brush only provides a discharge path and cannot form an oil film inside the bearing. It also cannot reduce the common-mode current from the source. The shaft current still exists, so the bearings of the electric drive assembly are still damaged.

[0027] Another way is to start from the path through which the shaft current flows, change the impedance on the shaft current path, and block the shaft current path. For example, the impedance on the shaft current path can be changed by adding active filters and passive filters. The problem is that the parameters of the active filter are difficult to design. When there are problems with the design parameters, new noise may be introduced and power loss may occur. The passive filter parameter design is relatively simple, but it will also cause heating problems. For example, the impedance on the shaft current path can be changed by changing the bearing to a ceramic ball bearing, but the cost of ceramic balls is much greater than that of steel balls, and the stiffness of ceramic balls is also lower than that of steel balls.

[0028] Please also read Figure 1 and Figure 2 An embodiment of the present invention provides an electric drive component 10, which includes a motor 11, a controller 12 and a connector 13. The controller 12 is electrically connected to the motor 11. For example, the three-phase output line of the controller 12 can be connected to the stator winding of the motor 11, which helps to maintain the normal operation of the electric drive component 10.

[0029] The motor 11 is provided with a first connecting portion 111, the controller 12 is provided with a second connecting portion 121, and the connecting member 13 is connected to the first connecting portion 111 and the second connecting portion 121. For example, the first connecting portion 111 and the second connecting portion 121 are both provided with connecting through holes, and the connecting member 13 respectively penetrates the through holes of the first connecting portion 111 and the through holes of the second connecting portion 121 to connect the motor 11 and the controller 12. The connecting member 13 helps to ensure the stability of the connection between the motor 11 and the controller 12, and helps to improve the compactness of the structure of the electric drive component 10.

[0030] In some embodiments, at least one of the first connection portion 111 and the second connection portion 121 is provided with an insulating layer 14, and the connector 13 abuts against the insulating layer 14. For example, the first connection portion 111 may be provided with an insulating layer 14, and the connector 13 abuts against the insulating layer 14 of the first connection portion 111, and in this case, the connector 13 is insulated from the first connection portion 111; for another example, the second connection portion 121 may be provided with an insulating layer 14, and the connector 13 abuts against the insulating layer 14 of the second connection portion 121, and in this case, the connector 13 is insulated from the second connection portion 121; for another example, both the first connection portion 111 and the second connection portion 121 may be provided with an insulating layer 14, and the connector 13 abuts against the insulating layer 14 of the first connection portion 111 and the insulating layer 14 of the second connection portion 121 at the same time, and in this case, the connector 13 is insulated from the first connection portion 111 and the second connection portion 121.

[0031] In this way, the insulating layer 14 helps to block the circuit of the coaxial current between the motor 11 and the controller 12, helps to prevent the coaxial current from circulating in the loop between the motor 11 and the controller 12, and helps to prevent the shaft current from flowing inside the bearing of the motor 11, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor 11 and helping to improve the service life and mechanical durability of the bearing of the motor 11. And because the motor 11 and the controller 12 do not form a common mode current closed loop, it helps to prevent the electric drive component 10 from heating up and helps to improve the reliability of the operation of the electric drive component 10.

[0032] In addition, the motor 11 and the controller 12 block the shaft current in a simple manner and are easy to manufacture.

[0033] To facilitate understanding of the function of the insulating layer 14 in the present embodiment, refer to Figure 3 and Figure 4 .in, Figure 3 is an equivalent circuit diagram between the motor 11 and the controller 12 when the insulating layer 14 is not provided, Figure 4 FIG. 1 is an equivalent circuit diagram between the motor 11 and the controller 12 when an insulating layer 14 is provided.

[0034] The common mode current generated when the power device is switched induces a bearing voltage u on the shaft of the motor 11. b , bearing voltage u b This results in a current loop being formed between the inner and outer rings of the bearing of the motor 11, in which the shaft current flows, and the common mode current has the following three loops.

[0035] like Figure 3 As shown, the power device switches instantly generate a common-mode voltage U CMV , the common mode current passes through the coupling capacitor C between the stator winding and the stator wf The common mode current flows to the housing of the motor 11 to form a first loop; the common mode current passes through the coupling capacitor C between the stator winding and the rotorwr , and then through the coupling capacitor C between the rotor and the stator core sr Returning to the housing of the motor 11, a second loop is formed; the common mode current passes through the coupling capacitor C between the stator winding and the rotor wr , and then through the equivalent capacitance C of the bearing of motor 11 b The current flows to the housing of the motor 11 to form a third loop, and at this time the shaft current flows through the bearing of the motor 11. Wherein, R is the resistance of the equivalent circuit, and L is the inductance of the equivalent circuit.

[0036] The bearings of motor 11 have three equivalent models in different states due to the different internal oil film forms, namely the resistance state when the oil film is not established, the resistance-capacitance state when the oil film is unstable, and the capacitance state under the stable oil film state. Since the shaft current is not conducive to the formation of the oil film, when the shaft current is large, the oil film is not well established, resulting in dry grinding of the bearings of motor 11, which will accelerate the rate of damage to the bearings of motor 11, and when the bearing voltage is too large, the oil film will be broken down, resulting in EDM phenomenon in the bearings, causing serious electrical corrosion of the bearings of motor 11, and reducing the service life of the bearings of motor 11.

[0037] like Figure 4 As shown, when the electric drive assembly 10 is provided with an insulating layer 14, the circuit of the common mode current between the first connection portion 111 and the second connection portion 121 is blocked, so that the common mode current cannot flow between the first connection portion 111 and the second connection portion 121, and the shaft current cannot circulate in the circuit. This helps to avoid the shaft current flowing inside the bearing of the motor 11, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor 11 and helping to increase the service life of the bearing of the motor 11.

[0038] See also Figure 5 In some embodiments, the connector 13 includes a motor connector 131 and a controller connector 132 that are opposite to each other, the motor connector 131 is interference fit with the first connector 111, and the controller connector 132 is interference fit with the second connector 121. In this way, elastic pressure is generated when the motor connector 131 is connected to the first connector 111, and the controller connector 132 is connected to the second connector 121, which helps to improve the tightness of the motor connector 131 connected to the first connector 111, and helps to improve the tightness of the controller connector 132 connected to the second connector 121.

[0039] In some embodiments, when the first connection portion 111 is provided with an insulating layer 14, the motor connection portion 131 abuts against the insulating layer 14, the controller connection portion 132 is connected to the second connection portion 121, and the dimension of the insulating layer 14 along the height direction of the connector 13 is larger than the dimension of the first connection portion 111 along the height direction of the connector 13. This helps to ensure that the insulating layer 14 has a sufficient size area along the height direction of the connector 13 to cover the first connection portion 111, helps to avoid contact between the first connection portion 111 and the motor connection portion 131, and thus helps to avoid circuit conduction of common mode current.

[0040] In this way, the insulating layer 14 of the first connecting portion 111 helps to simplify the structure of the electric drive assembly 10 and save manufacturing costs while ensuring the insulation effect of the first connecting portion 111 and the motor connecting portion 131.

[0041] In some embodiments, the insulating layer 14 includes a first insulating layer 141 and a second insulating layer 142 connected to each other, the first insulating layer 141 extends along the height direction and is located between the first connecting portion 111 and the motor connecting portion 131, and the second insulating layer 142 extends along the length direction of the connector 13 and connects the first connecting portion 111 and the motor connecting portion 131, respectively.

[0042] For example, the first insulating layer 141 and the second insulating layer 142 can be distributed at an angle of approximately 90 degrees, the first insulating layer 141 is located between the first connecting portion 111 and the motor connecting portion 131, and the second insulating layer 142 is located on the side of the first connecting portion 111 facing the second connecting portion 121. In this way, the second insulating layer 142 helps to increase the insulating area of ​​the insulating layer 14, and helps to prevent external conductive media such as acids, alkalis, and saline solutions from scattering on the surface of the first connecting portion 111 facing the second connecting portion 121, thereby conducting a common-mode current circuit.

[0043] In this way, the first insulating layer 141 and the second insulating layer 142 help to ensure that the insulating layer 14 has sufficient insulating area. The first insulating layer 141 and the second insulating layer 142 can jointly insulate the first connection part 111 and the motor connection part 131, which helps to improve the insulation effect between the motor connection part 131 and the first connection part 111, and helps to better block the circuit of the common mode current between the first connection part 111 and the motor connection part 131.

[0044] In some embodiments, when the second connection portion 121 is provided with an insulating layer 14, the controller connection portion 132 abuts against the insulating layer 14, the motor connection portion 131 is connected to the first connection portion 111, and the dimension of the insulating layer 14 along the height direction of the connector 13 is larger than the dimension of the second connection portion 121 along the height direction of the connector 13. This helps to ensure that the insulating layer 14 has a sufficient size area along the height direction of the connector 13 to cover the second connection portion 121, helps to avoid contact between the second connection portion 121 and the controller connection portion 132, and thus helps to avoid circuit conduction of common mode current.

[0045] In this way, the insulating layer 14 of the second connecting portion 121 helps to simplify the structure of the electric drive assembly 10 and save manufacturing costs while ensuring the insulation effect between the second connecting portion 121 and the controller connecting portion 132 .

[0046] In some embodiments, the controller connecting portion 132 includes a head 1321 and a connecting portion 1322 connected to each other, the insulating layer 14 includes a third insulating layer 143 and a fourth insulating layer 144 connected to each other, the third insulating layer 143 extends along the height direction of the connecting member 13 and is located between the second connecting portion 121 and the connecting portion 1322, and the fourth insulating layer 144 extends along the length direction of the connecting member 13 and is located between the second connecting portion 121 and the head 1321.

[0047] For example, the third insulating layer 143 and the fourth insulating layer 144 may be distributed at an angle of approximately 90 degrees, the third insulating layer 143 is located between the second connection portion 121 and the controller connection portion 132, and the fourth insulating layer 144 is located on the side of the second connection portion 121 away from the first connection portion 111 and connected to the head 1321. In this way, the fourth insulating layer 144 helps to prevent the head 1321 from contacting the second connection portion 121, and helps to prevent the conduction of the common mode current circuit.

[0048] In this way, the third insulating layer 143 and the fourth insulating layer 144 help to ensure that the insulating layer 14 has sufficient insulating area. The third insulating layer 143 and the fourth insulating layer 144 can jointly insulate the second connection part 121 and the controller connection part 132, which helps to improve the insulation effect between the controller connection part 132 and the second connection part 121, and helps to better block the circuit of the common mode current between the second connection part 121 and the controller connection part 132.

[0049] In some embodiments, the insulating layer 14 may further include a fifth insulating layer 145 , which is connected to a side of the third insulating layer 143 away from the fourth insulating layer 144 , and extends along the length direction of the connector 13 and connects the second connecting portion 121 and the connecting portion 1322 , respectively.

[0050] For example, the fifth insulating layer 145 and the fourth insulating layer 144 may be distributed at an angle of approximately 90 degrees, and the fifth insulating layer 145 is located on the side of the second connection portion 121 facing the first connection portion 111. In this way, the fifth insulating layer 145 helps to increase the insulating area of ​​the insulating layer 14, and helps to prevent external conductive media such as acid, alkali, and saline solution from scattering on the surface of the second connection portion 121 facing the first connection portion 111, thereby conducting a circuit of common mode current.

[0051] In this way, the third insulating layer 143 , the fourth insulating layer 144 and the fifth insulating layer 145 help to ensure that the insulating layer 14 has a sufficient insulating area, which helps to better block the circuit of the common mode current between the second connecting portion 121 and the controller connecting portion 132 .

[0052] In some embodiments, the first connection part 111 and the second connection part 121 may be provided with an insulating layer 14, and the motor connection part 131 and the controller connection part 132 may be insulated against the insulating layer 14. In this way, the insulating layer 14 of the first connection part 111 can insulate the first connection part 111 and the motor connection part 131, and the insulating layer 14 of the second connection part 121 can insulate the second connection part 121 and the controller connection part 132, which helps to achieve double insulation between the connector 13 and the first connection part 111 and the second connection part 121. The insulating layer 14 of the first connection part 111 and the insulating layer 14 of the second connection part 121 help to better block the circulation circuit of the common mode current between the motor 11 and the controller 12, help to avoid the shaft current flowing inside the bearing of the motor 11, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor 11, and help to improve the service life and mechanical durability of the bearing of the motor 11.

[0053] In addition, when the insulation effect of the insulating layer 14 of the first connection part 111 is reduced, the electric drive component 10 can also be insulated by the insulating layer 14 of the second connection part 121; when the insulation effect of the insulating layer 14 of the second connection part 121 is reduced, the electric drive component 10 can also be insulated by the insulating layer 14 of the first connection part 111.

[0054] In some embodiments, the insulating layer 14 is insulating glue. For example, the insulating layer 14 can be made of industrial glue such as structural glue, instant glue, hot melt glue, adhesive glue, etc. In other embodiments, the insulating glue can also be other.

[0055] When the first connection part 111 is provided with an insulating layer 14, the insulating layer 14 can be coated on the surface of the first connection part 111 facing the motor connection part 131; when the second connection part 121 is provided with an insulating layer 14, the insulating layer 14 can be coated on the surface of the second connection part 121 facing the controller connection part 132; when the first connection part 111 and the second connection part 121 are both provided with an insulating layer 14, the insulating layer 14 can be coated on the surface of the first connection part 111 facing the motor connection part 131 and the surface of the second connection part 121 facing the controller connection part 132.

[0056] In this way, the insulating glue helps to save manufacturing costs, and the way the insulating glue is connected to the first connecting part 111 and / or the second connecting part 121 is simple, which helps to simplify the process of connecting the insulating layer 14 to the first connecting part 111 and / or the second connecting part 121, and helps to facilitate manufacturing.

[0057] In other embodiments, the insulating layer 14 may also be an insulating structure such as an insulating tape, which may be specifically configured according to actual conditions.

[0058] See also Figure 6 The embodiment of the present invention provides a vehicle 100, which may be a hybrid vehicle, a pure electric vehicle, a fuel cell vehicle or other new energy vehicle. In other embodiments, the vehicle 100 may also be other types of vehicles.

[0059] The vehicle 100 includes a body 20 and an electric drive assembly 10, and the electric drive assembly 10 is installed on the body 20. In this way, the electric drive assembly 10 can provide power for the vehicle 100, and the electric drive assembly 10 can convert the electrical energy of the system into mechanical energy to drive the vehicle 100 to move, which helps to meet the movement requirements of the vehicle 100.

[0060] In summary, the electric drive assembly 10 and the vehicle 100 provided by the embodiment of the present invention include a motor 11, a controller 12 and a connector 13, and the controller 12 is electrically connected to the motor 11. The motor 11 is provided with a first connecting portion 111, and the controller 12 is provided with a second connecting portion 121. The connector 13 is connected to the first connecting portion 111 and the second connecting portion 121, and the connector 13 helps to ensure the stability of the connection between the motor 11 and the controller 12, and helps to improve the compactness of the structure of the electric drive assembly 10. At least one of the first connecting portion 111 and the second connecting portion 121 is provided with an insulating layer 14, and the connector 13 abuts against the insulating layer 14, so that the insulating layer 14 helps to block the circuit of the common mode current between the motor 11 and the controller 12, helps to avoid the common mode current circulating in the loop between the motor 11 and the controller 12, and helps to avoid the shaft current flowing inside the bearing of the motor 11, thereby helping to reduce the risk of electrical corrosion of the bearing of the motor 11, and helping to improve the service life and mechanical durability of the bearing of the motor 11. Furthermore, since the insulating layer blocks the common mode current circuit between the motor 11 and the controller 12, the motor 11 and the controller 12 do not form a common mode current closed loop, which helps to prevent the electric drive assembly 10 from heating up and helps to improve the reliability of the electric drive assembly 10. In addition, the method of blocking the shaft current by the motor 11 and the controller 12 is simple and convenient to manufacture.

[0061] In the present invention, unless otherwise clearly specified or limited, the term "assembly" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, it can be only surface contact, or it can be connected through surface contact of an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as a specific reference or special structure. The description of the term "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present invention and the features of the different embodiments or examples without contradiction.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An electric drive assembly, characterized in that: include: A motor, the motor comprising a housing, a stator, a stator winding, a rotor, a rotating shaft and a bearing, the stator, the stator winding and the rotor are all located in the housing, the rotor is arranged on the rotating shaft, the rotating shaft is arranged on the housing through the bearing, and the housing is provided with a first connecting portion; A controller, wherein the rotating shaft is located outside the controller, a three-phase output line of the controller is electrically connected to the stator winding, and the controller is provided with a second connecting portion; and A connector, the connector comprising a motor connector and a controller connector facing each other, the motor connector being connected to the first connector, the motor connector and the first connector being interference fit, the controller connector being connected to the second connector, the controller connector and the second connector being interference fit, the first connector and the second connector being respectively provided with an insulating layer, the insulating layer being insulating glue, the connector abutting against the insulating layer to block a common mode current generated when a power device is switched from flowing from the first connector to the second connector, so as to prevent an axial current from flowing through the interior of the bearing; Wherein, in the case where the first connecting portion is provided with the insulating layer, the motor connecting portion abuts against the insulating layer, and the dimension of the insulating layer along the height direction of the connecting member is larger than the dimension of the first connecting portion along the height direction so as to cover the first connecting portion; When the second connection portion is provided with the insulating layer, the controller connection portion abuts against the insulating layer, and a dimension of the insulating layer along a height direction of the connector is larger than a dimension of the second connection portion along the height direction so as to cover the second connection portion.

2. The electric drive assembly according to claim 1, characterized in that: The insulating layer includes a first insulating layer and a second insulating layer connected to each other, the first insulating layer extends along the height direction and is located between the first connecting part and the motor connecting part, the second insulating layer is located on the side of the first connecting part facing the second connecting part, and the second insulating layer extends along the length direction of the connecting piece and connects the first connecting part and the motor connecting part respectively.

3. The electric drive assembly according to claim 1, characterized in that: The controller connecting part includes a head and a connecting part connected to each other, the insulating layer includes a third insulating layer and a fourth insulating layer connected to each other, the third insulating layer extends along the height direction and is located between the second connecting part and the connecting part, and the fourth insulating layer extends along the length direction of the connector and is located between the second connecting part and the head.

4. The electric drive assembly according to claim 3, characterized in that: The insulating layer further includes a fifth insulating layer, the fifth insulating layer is connected to a side of the third insulating layer away from the fourth insulating layer, the fifth insulating layer extends along the length direction and is respectively connected to the second connecting portion and the connecting portion.

5. A vehicle, characterized in that: include: Car body; as well as According to any one of claims 1 to 4, the electric drive assembly is mounted on the vehicle body.

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