Motor and powertrain

Abstract

The present application provides a motor and a powertrain. The motor comprises a stator core, a rotor, a winding, and a shielded conductor; the stator core and the rotor are arranged relative to each other in a sleeving mode and spaced apart; the winding is arranged on the stator core; the shielded conductor is of a hollow cylindrical structure and is arranged between the winding and the rotor; the shielded conductor is spaced apart from the winding and is conductively connected to the stator core. The motor provided by the present application is conducive to reducing the electric corrosion of bearings connected to the rotor in the motor and prolonging the service life of the bearings.

Description

Motors and powertrains CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202410132813.X, filed on January 30, 2024, entitled “Motor and Powertrain,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of motor technology, and in particular to a motor and a powertrain. Background Art

[0003] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. A motor consists of a stator (the stationary part) and a rotor (the rotating part). The stator's primary function is to generate a rotating magnetic field, while the rotor's function is to convert electrical energy into mechanical energy within the rotating magnetic field according to the law of electromagnetic induction.

[0004] In the development of motors, in addition to improving the reliability of motors, the lifespan issue is also an issue that cannot be ignored. Therefore, how to improve the working life of motors is an issue of continuous improvement in motor technology. Summary of the Invention

[0005] The present application provides a motor and a power assembly, which are beneficial to improving the working life of the motor.

[0006] In the first aspect, the motor provided by the present application includes a stator core, a rotor, a winding and a shielding conductive part; the stator core and the rotor are relatively nested and spaced apart; the winding is arranged on the stator core; the shielding conductive part is hollow cylindrical and is arranged between the winding and the rotor, the shielding conductive part is spaced apart from the winding and is conductively connected to the stator core.

[0007] The motor provided in the present application, by arranging a shielding conductive member between the winding and the rotor, is beneficial to reducing the electrical corrosion of the bearings connected to the rotor in the motor and improving the life of the bearings.

[0008] In some embodiments, the shielding conductive member comprises an insulating portion and a conductive portion, the conductive portions and the insulating portions being arranged alternately. One end of the conductive portion along the axial direction is electrically connected to the stator core, while the other end is insulated from the stator core. This helps reduce eddy current losses during motor operation and further improves motor efficiency.

[0009] In some embodiments, the winding includes a main section and an end section. The main section is disposed corresponding to the stator core, and the end section is disposed at an axial end portion protruding from the stator core. At least a portion of the shielding conductive member is disposed between the end section and the rotor. This helps reduce eddy current losses generated in the shielding conductive member during motor operation.

[0010] In some embodiments, the shielding conductive member is located between the end segment and the rotor. The rotor includes a rotor body and a rotor shaft, with the rotor shaft protruding axially relative to the rotor body. Positioning the shielding conductive member between the end segment and the rotor shaft further reduces eddy current losses during motor operation, thereby improving motor efficiency.

[0011] In some embodiments, the conductive portion is strip-shaped and spirally arranged around the rotor, with an insulating portion between any two adjacent turns of the conductive portion. This arrangement reduces electrical corrosion of the bearings connected to the rotor, helps reduce eddy current losses in the conductive portion, and improves the operating efficiency of the motor.

[0012] In some embodiments, the insulating portion includes an insulating wrapping member that wraps around the outer periphery of the conductive portion. This arrangement facilitates insulation between two adjacent turns of the conductive portion and facilitates winding the strip-shaped conductive portion into a spiral shape.

[0013] In some embodiments, the dimension d of one turn of the conductive portion in the axial direction, i.e., the wire diameter, satisfies: d≤2mm. Setting d≤2mm not only reduces eddy current loss generated by the shielding conductive member, but also facilitates the preparation of the shielding conductive member.

[0014] In some embodiments, the motor further includes an insulating support member disposed between the winding and the rotor, and the shielding conductive member is supported by the insulating support member. This arrangement is conducive to improving the structural stability of the shielding conductive member.

[0015] In some embodiments, the insulating support member is connected to the inner wall of the stator core by an interference fit and is arranged to protrude axially from the end of the stator core. This connection method of the insulating support member is simple and fast, which helps reduce the processing difficulty during the motor manufacturing process. The insulating support member can also be connected to the inner wall and / or side wall of the stator core by bonding.

[0016] In some embodiments, the shielding conductive member is wound around the insulating support member, or the shielding conductive member is bonded to the insulating support member. The connection method is convenient and fast, which helps to reduce the process difficulty during the motor preparation process.

[0017] In some embodiments, the conductive portion is embedded in the insulating support. For example, the conductive portion is formed through an etching process and then deposited on the insulating support. Forming the conductive portion through deposition and etching facilitates forming the conductive portion in the desired shape, reduces eddy current losses in the shielding conductive member, and facilitates mass production of the shielding conductive member.

[0018] In some embodiments, the shielding conductive member further includes a resistor element connected to the conductive portion. In this way, the impedance of the shielding conductive member can be adjusted by the resistor element, which is beneficial for reducing eddy current loss of the shielding conductive member and thereby improving the working efficiency of the motor.

[0019] In a second aspect, the powertrain provided in the present application includes a motor according to any one of the above-mentioned embodiments.

[0020] The powertrain provided in this application has the same technical effects as the motor provided in any of the above-mentioned embodiments, and will not be described in detail here.

[0021] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] FIG1 is a schematic structural diagram of a motor according to some embodiments of the present application;

[0024] FIG2 is a schematic diagram of a partial structure of a motor according to some embodiments of the present application;

[0025] FIG3 is a schematic structural diagram of a first fixing member in some embodiments of the present application;

[0026] FIG4 is a cross-sectional schematic diagram of a first fixing member according to some embodiments of the present application;

[0027] FIG5 is a partial structural diagram of a motor according to some other embodiments of the present application;

[0028] FIG6 is a top view of a motor according to some embodiments of the present application.

[0029] Description of reference numerals:

[0030] 10. Motor; 11. Stator core; 11a. Groove; 12. Rotor; 13. Winding; 13a. Main body segment; 13b. End segment; 14. Shielding conductive part; 141. Insulating part; 142. Conductive part; 15. Insulating support member; X, axial direction. DETAILED DESCRIPTION

[0031] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0033] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0034] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] During motor operation, the stator core and rotor rotate relative to each other, converting electrical energy into mechanical energy. When the motor is powered on, electric field coupling is generated between the rotor and stator windings. The rotor shaft, which supports the rotor, typically contacts the bearings. This causes the bearings to be electrically charged during operation, generating shaft voltage between the inner and outer rings. This shaft voltage can easily cause electrical corrosion in the bearings, severely shortening their lifespan.

[0036] In light of this, the present application provides a technical solution in which a motor is provided with a shielding conductive member. The shielding conductive member is hollow, cylindrical, and disposed between the winding and the rotor. The shielding conductive member is electrically connected to the stator core. This shielding conductive member can reduce the shaft voltage of the bearing, thereby reducing the risk of electrical corrosion of the bearing and increasing the operating life of the motor.

[0037] It should be noted that the motors of the embodiments of the present application are particularly suitable for use as motors in vehicles, but are not limited to such use. If other devices utilize the motors provided by the present invention, they should also fall within the scope of protection of the present invention. For example, the motors of the embodiments of the present application can also be used in ships, aircraft, and the like. The vehicles can be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or extended-range electric vehicles.

[0038] As shown in Figures 1 to 3, a motor 10 according to an embodiment of the present application includes a stator core 11, a rotor 12, a winding 13, and a shielding conductive member 14. The stator core 11 and the rotor 12 are nested and spaced apart. The winding 13 is disposed within the stator core 11. The shielding conductive member 14 is hollow and cylindrical and is disposed between the winding 13 and the rotor 12. The shielding conductive member 14 is spaced apart from the winding 13 and is electrically connected to the stator core 11.

[0039] The rotor 12 may include a rotor body and a rotor shaft, and the rotor shaft is protruded relative to the rotor body in the axial direction X; wherein the rotor body is corresponding to the stator core 11, and at least one end of the rotor shaft along the axial direction X may protrude from the stator core 11.

[0040] The stator core 11 and the rotor 12 are relatively sleeved. According to the specific requirements of the motor 10 , the stator core 11 can be sleeved on the outer peripheral side of the rotor 12 , or the rotor 12 can be sleeved on the outer peripheral side of the stator core 11 .

[0041] The winding 13 is provided on the stator core 11 . The winding 13 can be wound around or embedded in the stator core 11 . When the winding 13 is energized, a magnetic field is generated. The rotor 12 rotates under the action of the magnetic field to convert electrical energy into mechanical energy.

[0042] The winding 13 may include a portion arranged between the opposite portions of the stator core 11 and the rotor 12, and a portion protruding from the stator core 11. The shielding conductive member 14 is arranged between the winding 13 and the rotor 12. The shielding conductive member 14 may be located between the portion where the winding 13 and the stator core 11 overlap with each other and the rotor 12, or the shielding conductive member 14 may be located between the portion of the winding 13 protruding from the stator core 11 in the axial direction X and the rotor 12 (i.e., the protruding rotor shaft portion). Of course, a shielding conductive member 14 may also be provided between the portion where the winding 13 and the stator core 11 overlap with each other and the rotor 12, and between the portion of the winding 13 protruding from the stator core 11 in the axial direction X and the rotor 12.

[0043] The rotor 12 and the stator core 11 may be coaxially arranged. The shielding conductive member 14 is in a hollow columnar shape. The shielding conductive member 14 may be coaxially arranged with the rotor 12 and spaced apart from the rotor 12 .

[0044] The shielding conductive member 14 is electrically connected to the stator core 11. Optionally, the shielding conductive member 14 and the stator core 11 can be electrically connected via a wire, or one end of the shielding conductive member 14 along the axial direction X can be in contact with and electrically connected to the stator core 11. In this way, the shielding conductive member 14 and the stator core 11 are arranged at the same potential to achieve the shielding conductive member 14's shielding effect on the winding 13 and the rotor 12. The shielding conductive member 14 can be electrically connected to the stator core 11 at only one end along the axial direction X to reduce the risk of the shielding conductive member 14 and the stator core 11 forming a loop.

[0045] The motor 10 may further include a housing and bearings. The rotor 12 is supported on the housing through the bearings and transmits mechanical energy.

[0046] The shielding conductive member 14 is arranged between the rotor 12 and the winding 13, especially between the protruding rotor shaft and the winding 13. The shielding conductive member 14 has a shielding effect, which can reduce the voltage coupled from the winding 13 to the rotor 12, thereby helping to reduce the shaft voltage of the inner and outer rings of the bearings matched with the rotor 12, thereby reducing the electrical corrosion of the bearings.

[0047] Providing an electrically connected shielding conductive member 14 to the stator core 11 can make the shielding conductive member 14 and the stator core 11 at the same potential, thereby effectively weakening the electric field coupling between the winding 13 and the rotor 12, and can greatly reduce the problem of the rotor 12 being charged due to the electric field coupling between the winding 13 and the rotor 12, that is, the problem of the rotor 12 shaft voltage, thereby greatly reducing or even eliminating the phenomenon of bearing corrosion caused by bearing discharge.

[0048] Therefore, the motor 10 provided in the embodiment of the present application, by setting a shielding conductive part 14 between the winding 13 and the rotor 12, is beneficial to reducing the electrical corrosion of the bearings connected to the rotor 12 in the motor 10, improving the life of the bearings, and thereby improving the working life of the motor 10.

[0049] As shown in Figures 1 to 3, in some embodiments, the shielding conductive member 14 has an insulating portion 141 and a conductive portion 142, and the conductive portion 142 and the insulating portion 141 are alternately arranged. One end of the conductive portion 142 along the axial direction X is electrically connected to the stator core 11, and the other end is insulated from the stator core 11.

[0050] The shielding conductive member 14 includes an insulating portion 141 and a conductive portion 142 . Optionally, the conductive portion 142 may be in a mesh shape, a winding shape, or any other shape having a spaced region extending radially through the rotor 12 .

[0051] The conductive portions 142 and the insulating portions 141 are arranged alternately. The insulating portions 141 and the conductive portions 142 can be arranged alternately along the axial direction X of the stator core 11, or alternately along the circumferential direction. Alternatively, the insulating portions 141 and the conductive portions 142 can be arranged alternately along both the axial direction X and the circumferential direction, depending on actual needs. Therefore, the conductive portions 142 can be arranged spirally around the rotor 12 in the axial direction X, or can be arranged back and forth along the axial direction X of the rotor 12.

[0052] By setting the shielding conductive part 14 to have an insulating part 141 and a conductive part 142, and the insulating part 141 and the conductive part 142 are arranged alternately, this is beneficial to reducing the eddy current loss generated by the shielding conductive part 14 while reducing the voltage of the winding 13 coupled to the rotor 12, which is beneficial to improving the efficiency of the motor 10.

[0053] Furthermore, since the conductive portion 142 of the shielding conductive member 14 is spaced apart from the insulating portion 141, the shielding conductive member 14 is connected to the stator core 11 only through one end, and the shielding conductive member 14 itself does not constitute an electrical circuit, thereby significantly reducing the eddy current loss generated by the conductive portion 142 itself, which is beneficial to further reduce the eddy current loss of the motor 10 during operation, and further beneficial to improving the working efficiency of the motor 10.

[0054] As shown in Figures 5 and 6, in some embodiments, the winding 13 includes a main section 13a and an end section 13b, the main section 13a is arranged corresponding to the stator core 11, and the end section 13b is arranged at the end of the stator core 11 along the axial direction X. At least a partial shielding conductive member 14 is arranged between the end section 13b and the rotor 12, for example, at least a partial shielding conductive member is arranged between the end section and the rotor shaft.

[0055] The body segment 13a is disposed in correspondence with the stator core 11, and the end segment 13b protrudes from the end of the stator core 11 in the axial direction X. Therefore, the body segment 13a and the end segment 13b can be disposed along the axial direction X. Since the body segment 13a is disposed in correspondence with the stator core 11, there is no portion between the body segment 13a and the rotor 12 where the shielding conductive member 14 is disposed. The stator core 11 provides a certain shielding effect between the body segment 13a and the rotor 12. Therefore, the voltage that can be coupled from the body segment 13a to the rotor 12 is relatively low. In contrast, the voltage that can be coupled from the end segment 13b to the rotor 12 is relatively high.

[0056] Alternatively, the shielding conductive member 14 may be entirely located between the end segment 13 b and the protruding rotor shaft of the rotor 12 , or a portion of the shielding conductive member 14 may be located between the end segment 13 b and the protruding rotor shaft of the rotor 12 , and another portion may be located between the body segment 13 a and the rotor 12 .

[0057] At least a portion of the shielding conductive member 14 is disposed between the end section 13 b and the rotor 12 , so that the shielding conductive member 14 can exert its shielding effect on the winding 13 and the rotor 12 to a greater extent.

[0058] In some embodiments, the rotor 12 includes a rotor body and a rotor shaft, the rotor shaft protrudes relative to the rotor body in the axial direction X, and the shielding conductive member 14 is located between the end segment 13 b and the rotor 12 .

[0059] The shielding conductive member 14 is located between the end segment 13b and the rotor shaft. Optionally, the shielding conductive member 14 can cover the entire end segment 13b, or the shielding conductive member 14 can cover part of the end segment 13b. It can be understood that the more the shielding conductive member 14 covers the end segment 13b, the more conducive it is to reducing the voltage coupled from the winding 13 to the rotor 12, and thus the more conducive it is to reducing the electrical corrosion of the bearings in the motor 10 that cooperate with the rotor 12.

[0060] As shown in FIG. 1 to FIG. 4 , in some embodiments, the conductive portion 142 is strip-shaped and spirally disposed around the rotor 12 , with an insulating portion 141 between two adjacent turns of the conductive portion 142 .

[0061] The conductive portion 142 is arranged in a spiral shape, and adjacent turns of the conductive portion 142 are arranged at intervals. The adjacent turns of the conductive portion 142 can be arranged with a gap, or an insulating component can be arranged between the adjacent turns of the conductive portion 142. Of course, both an insulating component and a gap can be arranged between the adjacent turns of the conductive portion 142.

[0062] The conductive portion 142 is spiral-shaped, which is beneficial to improving the shielding effect of the shielding conductive member 14 , reducing electrical corrosion of the bearing connected to the rotor 12 , and reducing eddy current loss of the conductive portion 142 , thereby improving the working efficiency of the motor 10 .

[0063] In some embodiments, the insulating portion 141 includes an insulating wrapping member, which is wrapped around the outer periphery of the conductive portion 142. In this way, the shielding conductive member 14 may include a conductive wire wrapped with the insulating wrapping member, and the conductive wire is spirally wound.

[0064] Therefore, the insulating portion 141 includes an insulating wrapping member, which is wrapped around the outer peripheral side of the strip-shaped conductive portion 142, which is beneficial to achieving insulation between two adjacent turns of the conductive portion 142 and facilitates winding the strip-shaped conductive portion 142 into a spiral shape.

[0065] As shown in FIG6 , in some embodiments, a dimension d of one turn of the conductive portion 142 along the axial direction X, that is, the wire diameter, satisfies: d≤2 mm.

[0066] Optionally, d can be 2mm, 1.9mm, 1.8mm, 1.7mm, 1.6mm, 1.5mm, 1.4mm, 1.3mm, 1.2mm, 1.1mm, 1mm, 0.9mm, 0.8mm, 0.7mm, 0.6mm, 0.5mm, 0.4mm, 0.3mm, 0.25mm, 0.2mm, 0.15mm or 0.1mm, etc.

[0067] It is understood that the smaller the dimension d of one turn of the conductive portion 142 along the axial direction X, the more conducive it is to reducing the eddy current loss of the shielding conductive member 14. Preferably, d is set to ≤ 2 mm. Under the premise of reducing the eddy current loss generated by the shielding conductive member 14, when the upper limit of d is 2 mm, it is also convenient to prepare the shielding conductive member 14.

[0068] As shown in FIG. 1 to FIG. 4 , in some embodiments, the motor 10 further includes an insulating support 15 . The insulating support 15 is disposed between the winding 13 and the rotor 12 , and the shielding conductive member 14 is supported by the insulating support 15 .

[0069] The insulating support member 15 can be used to support the shielding conductive member 14 so that the shielding conductive member 14 has a relatively stable structure.

[0070] The shielding conductive member 14 is supported on the insulating support member 15. Optionally, the shielding conductive member 14 can be arranged on the side of the insulating support member 15 facing the rotor 12, or the shielding conductive member 14 is arranged on the side of the insulating support member 15 facing the winding 13; or the shielding conductive member 14 is arranged inside the insulating support member 15.

[0071] The shielding conductive member 14 can be supported on the insulating support member 15 by winding, or the shielding conductive member 14 can be supported on the insulating support member 15 by bonding. Optionally, the insulating support member 15 and the shielding conductive member 14 can be integrally formed. For example, the shielding conductive member 14 can be formed on the insulating support member 15 through deposition and etching processes, such as in the form of a printed circuit board (PCB), wherein the substrate serves as the insulating support member 15, and the conductive wires in the printed circuit board serve as the conductive portion 142 of the shielding conductive member 14, and the conductive portion 142 is provided inside the insulating support member 15; or, the conductive portion 142 is clamped by the insulating support members 15 on both sides, thereby making the conductive portion 142 buried inside the insulating support member 15. Alternatively, the insulating support member 15 and the shielding conductive member 14 are formed separately and then connected together.

[0072] Therefore, providing the insulating support member 15 and providing the shielding conductive member 14 supported by the insulating support member 15 is beneficial to improving the structural stability of the shielding conductive member 14 .

[0073] As shown in Figures 1 to 3, in some embodiments, the stator core 11 is sleeved on the outside of the rotor 12, the inner wall of the stator core 11 has a groove 11a, a portion of the winding 13 is arranged in the groove 11a, and the insulating support 15 is clamped on the inner wall of the stator core 11 and is spaced apart from the winding 13.

[0074] The insulating support 15 is snap-fitted to the inner wall of the stator core 11, and the outer diameter of the insulating support 15 can be set to be greater than or equal to the inner diameter of the stator core 11. The shielding conductive member 14 is supported by the insulating support 15 and can be snap-fitted to the insulating support 15. The insulating support 15 can be hollow and cylindrical, and the shielding conductive member 14 can be located inside or outside the insulating support 15. The shielding conductive member 14 cannot contact the rotor 12 or the rotor shaft.

[0075] An insulating support member 15 is provided to be connected to the inner wall of the stator core 11 , and the stator core 11 provides support for the insulating support member 15 and the shielding conductive member 14 , which is beneficial to simplifying the structure of the motor 10 .

[0076] In some embodiments, the insulating support 15 is clamped to the inner wall of the stator core 11 by interference fit or the insulating support 15 can be connected to the inner wall of the stator core 11 by bonding and is arranged to protrude from the end of the stator core 11 along the axial direction X.

[0077] In this way, the connection between the insulating support 15 and the stator core 11 is convenient and quick, which is conducive to reducing the process difficulty during the preparation of the motor 10.

[0078] In some embodiments, the shielding conductive member 14 is wound around the insulating support member 15 .

[0079] In this way, the shielding conductive member 14 is wound around the insulating support member 15 during the winding process. The preparation and connection methods are convenient and fast, which is conducive to reducing the process difficulty during the preparation of the motor 10.

[0080] In some embodiments, the conductive portion 142 is deposited on the insulating support 15 and formed through an etching process.

[0081] The shielding conductive member 14 may be a printed circuit board and have a specific structural form. The shielding conductive member 14 may be formed into a cylindrical shape by curling a plate-shaped printed circuit board.

[0082] It can be understood that after the etching process, it is convenient to set the structural type of the conductive part 142 as needed. For example, in an embodiment in which the conductive part 142 of the shielding conductive part 14 is spiral, setting the conductive part 142 to be formed through the etching process is beneficial to reducing the size of one turn of the conductive part 142, and thus helping to reduce the eddy current loss of the shielding conductive part 14.

[0083] Therefore, the conductive portion 142 is formed through deposition and etching processes, which is beneficial for forming the conductive portion 142 of a desired shape and is beneficial for reducing the eddy current loss of the shielding conductive member 14 .

[0084] In some embodiments, the shielding conductive member 14 further includes a resistor element connected to the conductive portion 142 .

[0085] The resistance element can be connected in series or in parallel to the conductive portion 142 to adjust the impedance of the shielding conductive member 14 through the resistance element, which is beneficial to reducing the eddy current loss of the shielding conductive member 14 and thereby improving the working efficiency of the motor 10.

[0086] The powertrain provided according to the embodiment of the present application includes the motor 10 of any of the above embodiments. The powertrain may further include a reduction mechanism, and the motor is connected to the reduction mechanism.

[0087] As shown in Figures 1 to 6, in some embodiments, a motor 10 includes a stator core 11, a rotor 12, windings 13, a shielding conductive member 14, and an insulating support member 15. The stator core 11 is sleeved around the rotor 12 and spaced apart from the rotor 12. The rotor 12 includes a rotor shaft, at least one end of which protrudes from the stator core 11 along the axial direction X. The inner wall of the stator core 11 has a groove 11a. The winding 13 includes a main body section 13a and an end section 13b. The main body section 13a is accommodated in the groove 11a, and the end section 13b protrudes from the end of the stator core 11 along the axial direction X. The insulating support member 15 is secured to the inner wall of the stator core 11 via an interference fit and protrudes from the end of the stator core 11 in the axial direction X. The shielding conductive member 14 can be wound around the side of the insulating support member 15 facing the rotor 12 and positioned between the end segment 13b and the protruding rotor shaft of the rotor 12. The shielding conductive member 14 is spaced apart from the rotor 12 and electrically connected to the stator core 11. The shielding conductive member 14 includes an insulating portion 141 and a conductive portion 142, which alternate with the insulating portion 141. The conductive portion 142 is strip-shaped and spirally arranged around the rotor 12. One end of the conductive portion 142 in the axial direction X is electrically connected to the stator core 11, while the other end is insulated from the stator core 11. This maintains an open circuit state, preventing the conductive portion 142 from forming an electrical loop, thereby significantly reducing eddy current losses generated by the conductive portion 142 itself. An insulating portion 141 is located between any two adjacent turns of the conductive portion 142. The insulating portion 141 includes an insulating wrapping member, which wraps around the outer circumference of the strip-shaped conductive portion 142. Along the axial direction X, a dimension d of one turn of the conductive portion 142 satisfies: d≤2 mm.

[0088] Therefore, the motor 10 provided in the embodiment of the present application, by setting the shielding conductive part 14 to have an insulating part 141 and a conductive part 142, and arranging the insulating part 141 and the conductive part 142 alternately, is beneficial to reducing the electrical corrosion of the bearings connected to the rotor 12 in the motor 10, improving the life of the bearings, and reducing the eddy current loss of the motor 10, which is beneficial to improving the working efficiency of the motor 10.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A motor, characterized in that: include: A stator core and a rotor, wherein the stator core and the rotor are arranged opposite to each other and spaced apart; A winding is provided on the stator core; The shielding conductive member is in a hollow columnar shape and is arranged between the winding and the rotor. The shielding conductive member is spaced apart from the winding and is conductively connected to the stator core.

2. The motor according to claim 1, wherein The shielding conductive member has an insulating portion and a conductive portion, the conductive portion and the insulating portion are alternately arranged, one end of the conductive portion along the axial direction of the rotor is electrically connected to the stator core, and the other end is insulated from the stator core.

3. The motor according to claim 1 or 2, wherein: The winding includes a main body section and an end section. The main body section is arranged corresponding to the stator core. The end section protrudes from the end of the stator core along the axial direction. At least part of the shielding conductive member is arranged between the end section and the rotor.

4. The motor according to claim 3, wherein The rotor includes a rotor body and a rotor shaft. The rotor shaft protrudes relative to the rotor body in the axial direction. The shielding conductive member is located between the end segment and the protruding rotor shaft.

5. The motor according to claim 2, wherein The conductive portion is in a strip shape and is spirally arranged around the rotor. The insulating portion is located between any two adjacent turns of the conductive portion.

6. The motor according to claim 5, wherein The insulating portion includes an insulating wrapping member, and the insulating wrapping member is wrapped around the outer periphery of the conductive portion.

7. The motor according to claim 2, wherein The motor further includes an insulating support member disposed between the winding and the rotor, and the shielding conductive member is supported by the insulating support member.

8. The motor according to claim 7, wherein The insulating support is connected to the inner wall of the stator core by interference fit or bonding, and is arranged to protrude from the end of the stator core along the axial direction.

9. The motor according to claim 7 or 8, wherein: The shielding conductive member is wound around the insulating support member, or the shielding conductive member is adhered to the insulating support member; or the conductive portion is embedded in the insulating support member.

10. The motor according to claim 2, wherein The shielding conductive member further includes a resistance element connected to the conductive portion.

11. A powertrain, characterized in that: The method comprises the motor according to any one of claims 1 to 10.

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