Rotor, motor, power assembly and electric equipment

Abstract

The utility model is suitable for the technical field of motors, and provides a rotor, a motor, a power assembly and electric equipment, the electric equipment comprises the power assembly or the motor, the power assembly comprises the motor, and the motor comprises the rotor. The rotor comprises a retainer, magnetic steel and a conductive plate. The magnetic steel is arranged on the retainer; and a conductive plate is arranged on at least one side of the retainer along the axial direction of the rotor. The current-conducting plate is arranged on at least one side of the retainer along the axial direction, so that the current-conducting plate can shield a high-frequency harmonic magnetic field of the stator through the conduction characteristic of the current-conducting plate, the influence of the high-frequency harmonic magnetic field on the rotor can be reduced, the eddy-current loss is reduced, and the torque density of the motor is favorably improved.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and more specifically, relates to a rotor, a motor, a power assembly and an electric device. Background Art

[0002] In the related art, a motor may generally include a stator and a rotor. When the motor is working, the magnetic field generated by the stator may act on the rotor to realize the rotation of the rotor, thereby outputting power.

[0003] As the running speed of the rotor increases, the rotor is greatly affected by the harmonic magnetic field of the stator, which will produce greater eddy current losses and affect the improvement of the torque density of the motor. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a motor, a power assembly and an electric device, which can improve the technical problem of large eddy current loss of the motor.

[0005] In a first aspect, an embodiment of the present application provides a rotor, comprising:

[0006] Cage;

[0007] Magnetic steel, arranged on the retaining frame;

[0008] A conductive plate is provided on at least one side of the retaining frame along the axial direction of the rotor.

[0009] The rotor provided in the embodiment of the present application is provided with a conductive plate on at least one side of the retaining frame along the axial direction, so that the conductive plate can shield the high-frequency harmonic magnetic field of the stator through its conductive properties, thereby reducing the impact of the high-frequency harmonic magnetic field on the rotor, thereby reducing eddy current losses and helping to improve the torque density of the motor.

[0010] In some embodiments, along the axial direction of the rotor, one side of the rotor is the stator side, and a conductive plate is provided on a side of the retaining frame away from the stator side.

[0011] In this way, the conductive plate is arranged on the side of the retaining frame that is axially away from the stator, so that the conductive plate can be as far away from the stator as possible. In this way, the influence of the stator's spatial harmonic magnetic field on the conductive plate can be reduced, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the conductive plate.

[0012] In some embodiments, a conductive plate is provided on at least one side of the magnetic steel along the axial direction of the rotor.

[0013] In this way, the conductive plate can shield the high-frequency harmonic magnetic field of the stator to reduce the eddy current loss caused by the high-frequency harmonic magnetic field in the magnetic steel, which helps to improve the torque density of the motor.

[0014] In some embodiments, along the axial direction of the rotor, one side of the rotor is the stator side, and a conductive plate is provided on a side of the magnetic steel away from the stator side.

[0015] In this way, the influence of the space harmonic magnetic field of the stator on the conductive plate can be reduced, thereby reducing the eddy current loss caused by the space harmonic magnetic field on the conductive plate.

[0016] In some embodiments, the retaining frame is provided with a magnetic steel groove, and at least a portion of the magnetic steel is disposed in the magnetic steel groove.

[0017] In this way, the conductive plate can better shield the high-frequency harmonic magnetic field to reduce the eddy current loss caused by the high-frequency harmonic magnetic field in the rotor.

[0018] In some embodiments, a magnetic steel is provided on a side of the conductive plate away from the retaining frame along the axial direction of the rotor.

[0019] Such an arrangement enables the conductive plate to be arranged between the magnetic steel and the retaining frame, making the arrangement of the conductive plate very flexible.

[0020] In some embodiments, the rotor includes a plurality of rotor structures, and the rotor structure includes a retaining frame and a magnetic steel disposed on the retaining frame;

[0021] Along the axial direction of the rotor, a plurality of rotor structures are arranged in sequence, and a conductive plate is provided between two adjacent rotor structures.

[0022] Such arrangement enables the conductive plate to be disposed between the two rotor structures, so that the conductive plate can shield the high-frequency harmonic magnetic field of the stator to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the two rotor structures.

[0023] In some embodiments, on a projection plane perpendicular to the axial direction of the rotor, the projection of the conductive plate covers the projection of the magnetic steel and / or the projection of the retaining frame.

[0024] Such an arrangement enables the conductive plate to cover the high-frequency harmonic magnetic field, so as to better reduce the eddy current loss caused by the high-frequency harmonic magnetic field on at least one of the magnetic steel and the retaining frame.

[0025] In some embodiments, at least a portion of the conductive plate is a metal structure.

[0026] Such a configuration enables the conductive plate to have good conductive properties, thereby better shielding the high-frequency harmonic magnetic field of the stator to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the rotor. In addition, the configuration of the metal structure enables the conductive plate to also have good thermal conductivity, thereby providing an efficient heat dissipation channel for the magnetic steel, so that the heat of the magnetic steel can be dissipated through the conductive plate, thereby improving the heat dissipation effect of the magnetic steel, reducing the eddy current loss at the magnetic steel, and helping to improve the torque density of the motor.

[0027] In some embodiments, the conductive plate includes a plurality of first blocks; at least some of the first blocks are distributed in sequence along the axial direction of the rotor, and / or at least some of the first blocks are distributed in sequence along the radial direction of the rotor, and / or at least some of the first blocks are distributed in sequence along the circumferential direction of the rotor.

[0028] This arrangement makes the structural shape design of the conductive plate very flexible, so that the eddy current loss can be reduced in a targeted manner, and the heat dissipation capacity can be improved accordingly, which helps to improve the torque density of the motor.

[0029] In some embodiments, the rotor further includes a magnetic conductive plate; along the axial direction of the rotor, at least one side of the retaining frame is provided with a magnetic conductive plate.

[0030] By arranging a magnetic conductive plate on at least one side of the retaining frame, the magnetic conductive plate can shield the spatial harmonic magnetic field of the stator, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the rotor, thereby reducing the eddy current loss of the motor, and helping to improve the torque density of the motor.

[0031] In some embodiments, along the axial direction of the rotor, one side of the rotor is the stator side, and a magnetic conductive plate is provided on a side of the retaining frame close to the stator side.

[0032] Such an arrangement enables the magnetic conductive plate to be as close to the stator as possible, thereby effectively shielding the spatial harmonic magnetic field, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the rotor, and helping to improve the torque density of the motor.

[0033] In some embodiments, along the axial direction of the rotor, opposite sides of the rotor are provided with magnetic conductive plates.

[0034] Such an arrangement enables magnetic conductive plates to be provided on opposite sides of the rotor along the axial direction, thereby shielding the spatial harmonic magnetic field to a greater extent and reducing eddy current losses.

[0035] In some embodiments, the magnetic conductive plate includes multiple second blocks; at least some of the second blocks are distributed in sequence along the axial direction of the rotor, and / or at least some of the second blocks are distributed in sequence along the radial direction of the rotor, and / or at least some of the second blocks are distributed in sequence along the circumferential direction of the rotor.

[0036] Such an arrangement makes the structural shape design of the magnetic conductive plate very flexible, so that the eddy current loss can be reduced in a targeted manner. In this way, the inter-pole magnetic leakage of the magnetic steel can be reduced, which helps to improve the output torque of the motor.

[0037] In some embodiments, the magnetic steel includes multiple third blocks; at least part of the third blocks are distributed in sequence along the axial direction of the rotor, and / or, at least part of the third blocks are distributed in sequence along the radial direction of the rotor, and / or, at least part of the third blocks are distributed in sequence along the circumferential direction of the rotor.

[0038] By dividing the magnetic steel into a plurality of third blocks, the eddy current path inside the magnetic steel can be blocked, which helps to reduce the eddy current loss.

[0039] In a second aspect, an embodiment of the present application provides a motor, including a rotor.

[0040] The motor provided in the embodiment of the present application can reduce the eddy current loss of the motor by adopting the rotor involved above, which helps to improve the torque density of the motor.

[0041] In a third aspect, an embodiment of the present application provides a powertrain, including a motor.

[0042] The powertrain provided in the embodiment of the present application helps to improve the power of the powertrain by adopting the above-mentioned motor.

[0043] In a fourth aspect, an embodiment of the present application provides an electric device, including a motor or a powertrain.

[0044] The electric device provided in the embodiment of the present application helps to improve the power of the electric device by adopting the above-mentioned motor or power assembly.

[0045] 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

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0047] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0048] Figure 2 A schematic diagram of the structure of a motor provided in some embodiments of the present application;

[0049] Figure 3 A schematic diagram of the structure of a motor provided in some other embodiments of the present application;

[0050] Figure 4 A schematic diagram of the structure of a motor provided in some embodiments of the present application;

[0051] Figure 5 A schematic diagram of the structure of a motor provided in some further embodiments of the present application;

[0052] Figure 6 A three-dimensional structural diagram of a rotor provided in some embodiments of the present application;

[0053] Figure 7 for Figure 6 Schematic diagram of the decomposition of

[0054] Figure 8 for Figure 6 A cross-sectional view of

[0055] Fig. 9 A three-dimensional structural diagram of a rotor provided in some other embodiments of the present application;

[0056] Fig.10 for Fig. 9 Exploded diagram of

[0057] Fig.11 A partial cross-sectional view of a rotor provided for some other embodiments of the present application;

[0058] Fig.12 A partial cross-sectional view of a rotor provided in some further embodiments of the present application;

[0059] Fig.13 A partial cross-sectional view of a rotor provided in some embodiments of the present application;

[0060] Fig.14 A partial cross-sectional view of a rotor provided for some other embodiments of the present application;

[0061] Fig.15 A schematic diagram of a conductive plate of a rotor provided in some embodiments of the present application;

[0062] Fig.16 A schematic diagram of a magnetic conductive plate of a rotor provided in some embodiments of the present application;

[0063] Fig.17 Schematic diagram of a magnetic conductive plate of a rotor provided in some other embodiments of the present application;

[0064] Fig.18 A schematic diagram of a magnetic steel of a rotor provided in some embodiments of the present application;

[0065] Fig.19 Schematic diagram of the magnetic steel of the rotor provided in some other embodiments of the present application;

[0066] Fig. 20 Still other embodiments of the present application provide schematic diagrams of the magnetic steel of a rotor.

[0067] Among them, the reference numerals in the figure are:

[0068] 1000-powertrain; 2000-body; 100-motor; 200-battery; 300-controller; 400-gearbox; 10-rotor; 20-stator; 30-shaft; 101-stator side; 11-rotor structure; 111-holder; 1111-magnetic steel slot; 112-magnetic steel; 1121-third block; 12-conductive plate; 121-first block; 13-magnetic conductive plate; 131-second block; X-axial; Y-radial; Z-circumferential. DETAILED DESCRIPTION

[0069] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0070] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0072] In the description of the present application, "plurality" means more than two, and unless otherwise clearly and specifically defined, "more than two" includes two. Accordingly, "multiple groups" means more than two groups, including two groups.

[0073] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0075] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0076] In the related art, a motor may generally include a stator and a rotor. When the motor is working, the magnetic field generated by the stator may act on the rotor to realize the rotation of the rotor, thereby outputting power.

[0077] As the running speed of the rotor increases, the rotor is greatly affected by the harmonic magnetic field of the stator, which will produce greater eddy current losses and affect the improvement of the torque density of the motor.

[0078] As an example, the harmonic magnetic field of the stator may include a high-frequency harmonic magnetic field, which may have a greater impact on the rotor, thereby generating greater eddy current losses.

[0079] Based on the above considerations, the embodiments of the present application provide a rotor, a motor, a power assembly and an electric device. By arranging a conductive plate on at least one side of the retaining frame along the axial direction, the conductive plate can shield the high-frequency harmonic magnetic field of the stator through its conductive properties, thereby reducing the impact of the high-frequency harmonic magnetic field on the rotor, thereby reducing eddy current losses and helping to improve the torque density of the motor.

[0080] It should be noted that the motor is also called an electric motor. The motor is generally composed of two parts: the rotor and the stator. The motor is a device that converts electrical energy into mechanical energy. Specifically, the motor uses the energized coil of the stator to generate a rotating magnetic field and act on the rotor to form a magnetic electrodynamic rotation torque. The fixed part of the motor is called the stator; and the rotating part of the motor is called the rotor.

[0081] Among them, the motor can be divided into radial motor and axial motor. A radial motor is a motor in which the stator and the rotor are arranged radially. For example, the stator is located on the outer periphery of the rotor, that is, the stator is sleeved on the outer periphery of the rotor; or, the rotor is located on the outer periphery of the stator, that is, the rotor is sleeved on the outer periphery of the stator. An axial motor is a motor in which the stator and the rotor are arranged axially.

[0082] The motor mentioned in the embodiment of the present application is specifically an axial motor, which can be applied to a power assembly as a power source; it can also be applied to an electric device as a power source. The power assembly mentioned in the embodiment of the present application can also be applied to an electric device as a power source.

[0083] The electric device may be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0084] The electric equipment can also be a vehicle or a vehicle chassis. According to the power source, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. According to the driving mode, the vehicle can be a front-wheel drive vehicle, a rear-wheel drive vehicle or a four-wheel drive vehicle.

[0085] Among them, the motor can be integrated with one or more of the devices such as the battery, the controller, the gearbox, etc. to form a powertrain.

[0086] For the convenience of explanation, some embodiments of the present application are described using the electric device as a vehicle as an example.

[0087] See also Figure 1 , Figure 1 Schematic diagram of a vehicle provided for some embodiments of the present application. The above-mentioned power assembly 1000 is arranged inside the vehicle, and the power assembly 1000 can be arranged at the bottom, head or tail of the vehicle to provide power to the vehicle. Specifically, the vehicle can include a vehicle body 2000 and the power assembly 1000.

[0088] The vehicle body 2000 is the main supporting component of the vehicle, and the vehicle body has an engine room and a driver's cabin. The engine room is used to accommodate the powertrain 1000 of the vehicle, etc., and the driver's cabin is used to provide operating space and riding space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine room is arranged at the head of the vehicle body 2000, that is, the engine room is a front engine room. When the vehicle is a rear-wheel drive vehicle, the engine room is arranged at the rear of the vehicle body 2000, that is, the engine room is a rear engine room. When the vehicle is a four-wheel drive vehicle, the engine room is divided into a front engine room and a rear engine room, the front engine room is arranged at the head of the vehicle body 2000, and the rear engine room is arranged at the rear of the vehicle body 2000. The driver's cabin is arranged between the head and the rear of the vehicle body 2000.

[0089] The powertrain 1000 is the power system of the vehicle, that is, the electric drive system of the vehicle. The powertrain 1000 is used to convert electrical energy into mechanical energy to drive the vehicle to start, navigate, drive, and meet the working power requirements during driving. The powertrain 1000 is arranged on the vehicle body 2000. Specifically, a part of the powertrain 1000 can be arranged in the cabin, and another part of the powertrain 1000 can be arranged at the bottom of the vehicle body 2000.

[0090] In some embodiments, the power assembly 1000 may include a motor 100, and the motor 100 is used as a power source of the power assembly 1000. It can be understood that the power assembly 1000 is not limited to being used in vehicles, but can also be used in other electric devices that require power output.

[0091] In some embodiments, the powertrain 1000 may further include a controller 300, which is used to control the operation of the powertrain 1000. Specifically, the controller 300 is used to convert direct current into alternating current and output the alternating current to the motor 100 to control the operation of the motor 100, thereby achieving driving control of the vehicle. For example, the controller 300 can control the start, speed change and stop of the motor 100 to drive the vehicle to start, change speed and stop.

[0092] In some embodiments, the powertrain 1000 may further include a battery 200, and the controller 300 may further be used to control the battery 200 to supply power to the motor 100, such as for starting, navigating, and driving the vehicle. Specifically, the controller 300 is electrically connected to the battery 200, and the controller 300 is used to convert the direct current provided by the battery 200 into alternating current, and output the alternating current to the motor 100.

[0093] The controller 300 can also be used to convert AC power into DC power. For example, when the vehicle recovers kinetic energy, the motor 100 can convert the mechanical energy that drives it to rotate into AC power, and the controller 300 can convert the AC power into DC power and charge it back into the battery 200.

[0094] In some embodiments, the powertrain 1000 may further include a gearbox 400, which is connected to the motor 100 to achieve torque change of the motor 100. The gearbox 400, also known as a transmission, is a mechanism for changing the speed and torque from the engine, and it can change the output shaft and input shaft transmission ratio in a fixed or step-by-step manner.

[0095] In some embodiments, the controller 300 may be integrated with the motor 100 to form a powertrain 1000. The battery 200 may also be integrated with the motor 100 to form a powertrain 1000. The gearbox 400, the controller 300 and the motor 100 may also be integrated to form a powertrain 1000. The gearbox 400, the controller 300, the battery 200 and the motor 100 may also be integrated to form a powertrain 1000. Of course, in some embodiments, the powertrain 1000 may also be integrated with other structures, such as a cooling oil circuit.

[0096] Please also read Figures 2 to 5 , Figures 2 to 5 The schematic diagrams of the structures of the motor 100 provided in the embodiments of the present application are shown respectively. The motor 100 provided in the embodiments of the present application comprises a rotor 10, a stator 20 and a rotating shaft 30.

[0097] The rotating shaft 30 refers to a shaft-shaped structure used to output power in the motor 100. The rotor 10 is fixedly connected to the rotating shaft 30, so that the rotating shaft 30 can rotate under the drive of the rotor 10 to output power.

[0098] The stator 20 is sleeved on the outer circumference of the rotating shaft 30, and the stator 20 and the rotating shaft 30 can rotate relative to each other, thereby enabling the stator 20 and the rotor 10 to rotate relative to each other. For example, in some embodiments, the stator 20 can be supported on the rotating shaft 30 by bearings.

[0099] The rotor 10 and the stator 20 are sequentially distributed along the axial direction X, so that the rotor 10 is located on the side of the stator 20 along the axial direction X, so that the stator 20 drives the rotor 10 to rotate, thereby driving the rotating shaft 30 to rotate.

[0100] When the energized coil on the stator 20 is energized, a magnetic field is generated and acts on the rotor 10 to form a magneto-electrodynamic rotation torque, thereby rotating the rotor 10 and driving the shaft 30 to rotate together, so as to output power through the shaft 30 .

[0101] In some embodiments, in the motor 100 , the number of the rotor 10 may be one or more, and the number of the stator 20 may also be one or more.

[0102] The rotor 10 and the stator 20 are sequentially distributed along the axial direction X. Along the axial direction X, the side of the rotor 10 close to the stator 20 is the stator side 101 of the rotor 10 .

[0103] In some embodiments, see Figure 2 The rotor 10 may be one, and the stator 20 may be one. The stator 20 is located on one side of the rotor 10 in the axial direction X. The motor 100 has a simple structure and a small volume. The side of the rotor 10 close to the stator 20 in the axial direction X is the stator side 101.

[0104] In some embodiments, see Figure 3 The motor 100 includes two stators 20 and a rotor 10. The two stators 20 are located on opposite sides of the rotor 10 in the axial direction X, so that the two stators 20 can drive the same rotor 10 to rotate, thereby improving the output power, and the motor 100 has a more compact structure. The opposite sides of the rotor 10 in the axial direction X are both stator sides 101.

[0105] In some embodiments, see Figure 4 The motor 100 includes two rotors 10 and a stator 20. The two rotors 10 are located on opposite sides of the stator 20 in the axial direction X, and the two rotors 10 are fixedly connected to the rotating shaft 30. In this way, the two rotors 10 can be driven to rotate by one stator 20, and the same rotating shaft 30 can be driven to rotate to improve the output power. In addition, the structure of the motor 100 is more compact. Among the two rotors 10 of the motor 100, each rotor 10 close to the stator 20 along the axial direction X is the stator side 101 of the rotor 10.

[0106] In some embodiments, see Figure 5 The motor 100 includes a plurality of rotors 10 and a plurality of stators 20, which are arranged along the axial direction X. A stator 20 is disposed between two adjacent rotors 10 along the axial direction X, and a rotor 10 is disposed between two adjacent stators 20 along the axial direction X. The plurality of rotors 10 are driven to rotate by the plurality of stators 20, thereby driving the rotating shaft 30 to rotate, so as to increase the output power. The side of each rotor 10 close to the stator 20 along the axial direction X is the stator side 101 of the rotor 10.

[0107] It should be noted that the axial direction X refers to the axial direction X of the rotor 10, that is, the axial direction X of the rotating shaft 30, that is, the direction of the central axis of the rotating shaft 30. The radial direction Y refers to the radial direction Y of the rotor 10, that is, the radial direction Y of the rotating shaft 30, that is, the radial direction of the rotating shaft 30. The circumferential direction Z refers to the circumferential direction Z of the rotor 10, that is, the circumferential direction Z of the rotating shaft 30, that is, the circumferential direction of the rotating shaft 30. In the description of the rotor 10 above and below, the axial direction X, radial direction Y and circumferential direction Z involved have the same meanings as above, and unless otherwise specified, they all refer to the axial direction X, radial direction Y and circumferential direction of the rotor 10.

[0108] Please also read Figures 6 to 11 , and combined with other drawings. Among them, Figure 6 A three-dimensional structural diagram of a rotor 10 provided in some embodiments of the present application, Figure 7 for Figure 6 An exploded diagram of Figure 8 for Figure 6 Section view along AA. Fig. 9The three-dimensional structure diagram of the rotor 10 provided in some other embodiments of the present application is as follows: Fig.10 for Fig. 9 Exploded diagram of . Fig.11 The partial cross-sectional view of the rotor 10 provided in some embodiments of the present application. The rotor 10 provided in the embodiment of the present application comprises a retaining frame 111, a magnetic steel 112 and a conductive plate 12. The magnetic steel 112 is arranged on the retaining frame 111. Along the axial direction X of the rotor 10, at least one side of the retaining frame 111 is provided with a conductive plate 12.

[0109] The retaining frame 111 refers to a frame structure in the rotor 10 for fixing and supporting the magnetic steel 112 .

[0110] The holder 111 is fixedly connected to the rotating shaft 30 of the motor 100 to achieve a fixed adjacent effect between the rotor 10 and the rotating shaft 30. The holder 111 can rotate around the rotating shaft 30 to drive the rotating shaft 30 to rotate. The holder 111 and the rotating shaft 30 are coaxially arranged.

[0111] As an example, Figure 7 and Fig.10 As shown, in order to facilitate the smooth rotation of the retainer 111, the retainer 111 can be set as a disc-shaped structure. Based on this, the retainer 111 also has a circumferential direction Z, an axial direction X and a radial direction Y corresponding to the rotor 10. Among them, the axial direction X of the retainer 111 is parallel to the thickness direction of the retainer 111.

[0112] The magnetic steel 112 refers to a magnet used to provide a magnetic field in the rotor 10. The magnetic steel 112 generally refers to an aluminum-nickel-cobalt alloy, which is synthesized by several hard and strong metals. As an example, the magnetic steel 112 can be synthesized by iron and aluminum, nickel, cobalt, etc. As another example, the magnetic steel 112 can be synthesized by copper, niobium, tantalum, etc.

[0113] When the motor 100 is working, the stator 20 is energized and generates a magnetic field to act on the magnet 112 , so that the magnet 112 drives the retaining frame 111 to rotate, and then drives the rotating shaft 30 to rotate, thereby outputting power through the rotating shaft 30 .

[0114] The conductive plate 12 refers to a structure having conductive properties, wherein the conductive plate 12 can be but is not limited to a metal plate.

[0115] The holder 111 is provided with a conductive plate 12 on one side along the axial direction X; or, the holder 111 is provided with a conductive plate 12 on both opposite sides along the axial direction X. That is, the holder 111 is provided with a conductive plate 12 on at least one side along the axial direction X, so that the holder 111 and the conductive plate 12 are arranged along the axial direction X.

[0116] Based on the fact that at least one side of the retaining frame 111 along the axial direction X is provided with a conductive plate 12: in some possible designs, such as Figures 7 to 10As shown, in the axial direction X, the retaining frame 111 can be arranged adjacent to the conductive plate 12. Alternatively, in some other possible designs, such as Fig.11 As shown, in the axial direction X, an intermediate component may be provided between the holder 111 and the conductive plate 12, and the intermediate component may be, but is not limited to, a magnetic steel 112. That is, the magnetic steel 112 is provided on at least one side of the holder 111 along the axial direction X, and the conductive plate 12 is provided on the side of the magnetic steel 112 away from the holder 111 along the axial direction X, so that the magnetic steel 112 is provided between the holder 111 and the conductive plate 12 along the axial direction X.

[0117] Wherein, based on the fact that the retaining frame 111 and the conductive plate 12 are adjacently arranged along the axial direction X, the retaining frame 111 and the conductive plate 12 may contact each other along the axial direction X; or, the retaining frame 111 and the conductive plate 12 may be arranged at intervals.

[0118] Based on the fact that at least one side of the retaining frame 111 along the axial direction X is provided with a conductive plate 12: in some possible designs, such as Figures 6 to 11 As shown in FIG. 1 , the conductive plate 12 may also be located on the side of the magnetic steel 112 along the axial direction X, that is, the conductive plate 12 and the magnetic steel 112 are arranged along the axial direction X. In this way, the rotor 10 is projected on a plane perpendicular to the axial direction X, as shown in FIG. Fig. 9 and Fig.10 As shown in FIG. 1 , the projection of the conductive plate 12 may only cover the projection of the magnetic steel 112, but not cover the projection of the retaining frame 111, so that the conductive plate 12 can shield the high-frequency harmonic magnetic field to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the magnetic steel 112. Alternatively, the rotor 10 is projected on a plane perpendicular to the axial direction X, as shown in FIG. Figures 6 to 8 , Fig.11 As shown, the projection of the conductive plate 12 can also cover the projection of the magnetic steel 112 and the projection of the retaining frame 111, so that the conductive plate 12 can shield the high-frequency harmonic magnetic field to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the magnetic steel 112, and when the retaining frame 111 is a metal structure, the conductive plate 12 can also reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the retaining frame 111.

[0119] Alternatively, in some other possible designs, the conductive plate 12 may also be located on the side of the magnetic steel 112 along the radial direction Y, that is, the conductive plate 12 is not arranged along the axial direction X with the magnetic steel 112, but is arranged along the radial direction Y. In this way, on the projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 may only cover the projection of the retaining frame 111, so that when the retaining frame 111 is a metal structure, the conductive plate 12 can reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the retaining frame 111.

[0120] As described above, the conductive plate 12 shields the harmonic magnetic field of the stator 20 through its conductive property, so as to reduce the eddy current loss of the high-frequency harmonic magnetic field on at least one of the retaining frame 111 and the magnetic steel 112 .

[0121] The rotor 10 provided in the embodiment of the present application is configured with a conductive plate 12 on at least one side of the retaining frame 111 along the axial direction X, so that the conductive plate 12 can shield the high-frequency harmonic magnetic field of the stator 20 through its conductive properties, thereby reducing the impact of the high-frequency harmonic magnetic field on the rotor 10, thereby reducing eddy current losses and helping to improve the torque density of the motor 100.

[0122] In some embodiments, please refer to Figures 6 to 11 , and in combination with other drawings. The rotor 10 may include at least one rotor structure 11 , and the rotor structure 11 includes a retaining frame 111 and a magnetic steel 112 disposed on the retaining frame 111 .

[0123] In some embodiments, in the rotor 10, when the number of the rotor structures 11 is multiple, such as Figures 6 to 10 As shown, a plurality of rotor structures 11 may be arranged in sequence along the axial direction X.

[0124] In some embodiments, the rotor structure 11 includes a retaining frame 111 and at least one set of magnetic steels 112 .

[0125] In some embodiments, Figures 6 to 10 As shown, a group of magnetic steels 112 may include a plurality of magnetic steels 112 , and the plurality of magnetic steels 112 may be arranged along the circumferential direction Z on the retaining frame 111 .

[0126] In some embodiments, when the rotor structure 11 includes a set of magnetic steels 112, the set of magnetic steels 112 can be embedded in the retaining frame 111, such as Figures 6 to 10 Alternatively, the group of magnetic steel 112 is arranged on one side of the retaining frame 111 along the axial direction X, such as Fig.11 shown.

[0127] When the rotor structure 11 includes two groups of magnetic steels 112 , the two groups of magnetic steels 112 may be respectively disposed on opposite sides of the retaining frame 111 along the axial direction X.

[0128] In some embodiments, please refer to Figure 2 , Fig.11 and Fig.12 , and combined with other drawings. Among them, Fig.12 This is a partial cross-sectional view of a rotor 10 provided in some embodiments of the present application. Along the axial direction X of the rotor 10 , one side of the rotor 10 is the stator side 101 , and a conductive plate 12 is provided on the side of the retaining frame 111 away from the stator side 101 .

[0129] It can be understood that, of the two opposite sides of the rotor 10 along the axial direction X, only one side is the stator side 101. Specifically, Figure 2 , Fig.11 and Fig.12As shown, the stator 20 is disposed on one side of the rotor 10 along the axial direction X, so that the side of the rotor 10 close to the stator 20 along the axial direction X is the stator side 101 .

[0130] A conductive plate 12 is provided on a side of the retaining frame 111 away from the stator 20 along the axial direction X.

[0131] In this way, the conductive plate 12 is arranged on the side of the retaining frame 111 away from the stator 20 along the axial direction X, so that the conductive plate 12 can be as far away from the stator 20 as possible. In this way, the influence of the spatial harmonic magnetic field of the stator 20 on the conductive plate 12 can be reduced, so that the eddy current loss caused by the spatial harmonic magnetic field on the conductive plate 12 can be reduced.

[0132] In other embodiments, see Fig.13 , and combined with other drawings. Among them, Fig.13 The partial cross-sectional view of the rotor 10 provided in some embodiments of the present application. A conductive plate 12 may also be provided on one side of the retaining frame 111 close to the stator side 101 along the axial direction X.

[0133] In some embodiments, please refer to Figures 6 to 13 , and in combination with other drawings. Along the axial direction X of the rotor 10 , at least one side of the magnetic steel 112 is provided with a conductive plate 12 .

[0134] The conductive plate 12 is disposed on one side of the magnetic steel 112 along the axial direction X; or, the conductive plates 12 are disposed on two opposite sides of the magnetic steel 112 along the axial direction X, respectively.

[0135] This arrangement enables the projection of the conductive plate 12 to cover the projection of the magnetic steel 112 on the projection plane of the rotor 10 perpendicular to the axial direction X. In this way, the conductive plate 12 can shield the high-frequency harmonic magnetic field of the stator 20 to reduce the eddy current loss caused by the high-frequency harmonic magnetic field in the magnetic steel 112, which helps to improve the torque density of the motor 100.

[0136] In some embodiments, please refer to Figure 2 , Fig.11 and Fig.12 , and combined with other drawings. Along the axial direction X of the rotor 10 , one side of the rotor 10 is the stator side 101 , and a conductive plate 12 is provided on the side of the magnetic steel 112 away from the stator side 101 .

[0137] It can be understood that, of the two opposite sides of the rotor 10 along the axial direction X, only one side is the stator side 101. Specifically, Figure 2 , Fig.11 and Fig.12 As shown, the stator 20 is disposed on one side of the rotor 10 along the axial direction X, so that the side of the rotor 10 close to the stator 20 along the axial direction X is the stator side 101 .

[0138] A conductive plate 12 is provided on a side of the magnetic steel 112 away from the stator 20 along the axial direction X.

[0139] In this way, the conductive plate 12 is arranged on the side of the magnetic steel 112 away from the stator 20 along the axial direction X, so that the conductive plate 12 can be as far away from the stator 20 as possible. In this way, the influence of the spatial harmonic magnetic field of the stator 20 on the conductive plate 12 can be reduced, so that the eddy current loss caused by the spatial harmonic magnetic field on the conductive plate 12 can be reduced.

[0140] In other embodiments, see Fig.14 , and combined with other drawings. Among them, Fig.14 The partial cross-sectional view of the rotor 10 provided in some other embodiments of the present application. A conductive plate 12 may also be provided on the side of the magnetic steel 112 close to the stator side 101 along the axial direction X.

[0141] Based on the above structure, the layout of the conductive plate 12 may adopt at least one of the following solutions:

[0142] The first one, such as Fig.11 and Fig.12 As shown, the conductive plate 12 can be arranged on the side of the retaining frame 111 away from the stator side 101 along the axial direction X, and on the side of the magnetic steel 112 away from the stator side 101 along the axial direction X. The magnetic steel 112 can be embedded in the retaining frame 111, as shown in FIG. Fig.12 Alternatively, a magnetic steel 112 may be provided on the side of the retainer 111 away from the stator side 101 along the axial direction X, and the magnetic steel 112 is provided between the conductive plate 12 and the retainer 111 along the axial direction X, as shown in FIG. Fig.11 shown.

[0143] The second type, such as Fig.13 As shown, the conductive plate 12 can be provided on the side of the holder 111 close to the stator side 101 along the axial direction X, and on the side of the magnetic steel 112 away from the stator side 101 along the axial direction X. That is, the magnetic steel 112 is provided on the side of the holder 111 close to the stator side 101 along the axial direction X, and the magnetic steel 112 is provided between the holder 111 and the conductive plate 12 along the axial direction X.

[0144] The third type, such as Fig.14 As shown, the conductive plate 12 can be provided on the side of the holder 111 away from the stator side 101 along the axial direction X, and provided on the side of the magnetic steel 112 close to the stator side 101 along the axial direction X. That is, the magnetic steel 112 is provided on the side of the holder 111 away from the stator side 101 along the axial direction X, and the magnetic steel 112 is provided between the holder 111 and the conductive plate 12 along the axial direction X.

[0145] Fourthly, the conductive plate 12 may be disposed on the side of the holder 111 close to the stator side 101 along the axial direction X, and on the side of the magnetic steel 112 close to the stator side 101 along the axial direction X. The magnetic steel 112 may be embedded in the holder 111; or, the magnetic steel 112 may be disposed on the side of the holder 111 close to the stator side 101 along the axial direction X, and the magnetic steel 112 may be disposed between the conductive plate 12 and the holder 111 along the axial direction X.

[0146] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The retaining frame 111 is provided with a magnetic steel groove 1111 , and at least a portion of the magnetic steel 112 is disposed in the magnetic steel groove 1111 .

[0147] The magnetic steel slot 1111 refers to a slot on the retaining frame 111 for mounting the magnetic steel 112 . At least a portion of the magnetic steel 112 is disposed in the magnetic steel slot 1111 , so that the magnetic steel 112 is embedded in the retaining frame 111 .

[0148] In this way, on the projection plane of the rotor 10 perpendicular to the first direction, the projection of the conductive plate 12 is arranged to cover the projection of the retaining frame 111 and the projection of the magnetic steel 112. In this way, the conductive plate 12 can better shield the high-frequency harmonic magnetic field to reduce the eddy current loss caused by the high-frequency harmonic magnetic field in the rotor 10.

[0149] The conductive plate 12 may be fixed to the retaining frame 111 by bonding, welding, bolting, riveting, or the like.

[0150] The conductive plate 12 may also be fixed to the magnetic steel 112 by bonding, welding, bolting, riveting, etc.

[0151] In some embodiments, please refer to Fig.13 and Fig.14 , and in combination with other drawings. Along the axial direction X of the rotor 10 , a magnetic steel 112 is provided on the side of the conductive plate 12 away from the retaining frame 111 .

[0152] It can be understood that the retaining frame 111 , the conductive plate 12 and the magnetic steel 112 are arranged in sequence along the axial direction X. Moreover, the magnetic steel 112 is disposed on the conductive plate 12 .

[0153] As an example, Fig.13 As shown, along the axial direction X of the rotor 10, one side of the rotor 10 is the stator side 101, a conductive plate 12 is provided on the side of the retainer 111 close to the stator side 101, and a magnetic steel 112 is provided on the side of the conductive plate 12 close to the stator side 101. Based on this, on the projection plane of the rotor 10 perpendicular to the axial direction X, the magnetic steel 112 can completely cover the conductive plate 12. In this way, the magnetic steel 112 can isolate the stator 20 and the conductive plate 12 to reduce the eddy current loss caused by the spatial harmonic magnetic field on the conductive plate 12.

[0154] As another example, Fig.14 As shown, along the axial direction X of the rotor 10 , one side of the rotor 10 is the stator side 101 , a conductive plate 12 is provided on the side of the retaining frame 111 away from the stator side 101 , and a magnetic steel 112 is provided on the side of the conductive plate 12 away from the stator side 101 .

[0155] As another example, along the axial direction X of the rotor 10 , the two opposite sides of the rotor 10 are the stator sides 101 . A magnetic steel 112 is provided on at least one side of the retaining frame 111 along the axial direction X, and the magnetic conductive plate 13 is provided between the magnetic steel 112 and the retaining frame 111 along the axial direction X.

[0156] In this way, the conductive plate 12 can be arranged between the magnetic steel 112 and the retaining frame 111 , so that the arrangement of the conductive plate 12 is very flexible.

[0157] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The rotor 10 includes a plurality of rotor structures 11, and the rotor structure 11 includes a retaining frame 111 and a magnetic steel 112 disposed on the retaining frame 111. Along the axial direction X of the rotor 10, the plurality of rotor structures 11 are arranged in sequence, and a conductive plate 12 is disposed between two adjacent rotor structures 11.

[0158] Among them, on the projection surface of the rotor 10 perpendicular to the axial direction X, the conductive plate 12 can cover the magnetic steel 112 of the rotor structure 11, can also cover the retaining frame 111 of the rotor structure 11, and can also cover the magnetic steel 112 and the retaining frame 111 of the rotor structure 11.

[0159] Such arrangement enables the conductive plate 12 to be disposed between the two rotor structures 11 . In this way, the conductive plate 12 can shield the high-frequency harmonic magnetic field of the stator 20 , so as to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the two rotor structures 11 .

[0160] Specifically, if Figures 6 to 10 As shown, both opposite sides of the rotor 10 along the axial direction X are stator sides 101 . That is, along the axial direction X, the rotor 10 is disposed between the two stators 20 .

[0161] In some embodiments, please refer to Figures 6 to 10 In combination with other drawings, on a projection plane perpendicular to the axial direction X of the rotor 10 , the projection of the conductive plate 12 covers at least one of the projection of the magnetic steel 112 and the projection of the retaining frame 111 .

[0162] Among some possible designs, such as Figures 6 to 8 As shown, on the projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 covers the projection of the retaining frame 111 and the projection of the magnetic steel 112 .

[0163] In some other possible designs, such as Fig. 9 and Fig.10 On the projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 covers the projection of the magnetic steel 112 , but does not cover the projection of the retaining frame 111 .

[0164] In some other possible designs, on a projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 covers the projection of the retaining frame 111 , but does not cover the projection of the magnetic steel 112 .

[0165] Such a configuration enables the conductive plate 12 to cover the high-frequency harmonic magnetic field, so as to better reduce the eddy current loss caused by the high-frequency harmonic magnetic field on at least one of the magnetic steel 112 and the retaining frame 111 .

[0166] In some embodiments, Figures 6 to 8 As shown, on a projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 completely covers the projection of the cage 111 .

[0167] In some embodiments, Figures 6 to 11 On the projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the conductive plate 12 completely covers the projection of the magnetic steel 112 .

[0168] In some embodiments, at least a portion of the conductive plate 12 is a metal structure.

[0169] Such a configuration enables the conductive plate 12 to have good conductive properties, thereby better shielding the high-frequency harmonic magnetic field of the stator 20 to reduce the eddy current loss caused by the high-frequency harmonic magnetic field on the rotor 10. In addition, the configuration of the metal structure enables the conductive plate 12 to also have good thermal conductivity, thereby providing an efficient heat dissipation channel for the magnetic steel 112, so that the heat of the magnetic steel 112 can be dissipated through the conductive plate 12, thereby improving the heat dissipation effect of the magnetic steel 112, reducing the eddy current loss at the magnetic steel 112, and helping to improve the torque density of the motor 100.

[0170] In some examples, the conductive plate 12 may be provided as a copper plate.

[0171] In other examples, the conductive plate 12 may be provided as a copper-based alloy plate.

[0172] In some embodiments, please refer to Fig. 9 , Fig.10 and Fig.15 , and combined with other drawings. Among them, Fig.15 A schematic diagram of a conductive plate 12 of a rotor 10 provided in some embodiments of the present application. The conductive plate 12 includes a plurality of first segments 121 .

[0173] The first block 121 refers to a partial structure of the conductive plate 12 .

[0174] The plurality of first sub-blocks 121 of the conductive plate 12 may be laid out in at least one of the following three ways:

[0175] First, see Fig.10 At least part of the first blocks 121 are distributed in sequence along the axial direction X of the rotor 10 .

[0176] It can be understood that, in at least a portion of the first blocks 121 of the conductive plate 12 , the plurality of first blocks 121 of the portion are distributed in sequence along the axial direction X.

[0177] For the second one, see Fig.10 , and in combination with other drawings. At least part of the first blocks 121 are distributed in sequence along the circumferential direction Z of the rotor 10 .

[0178] It can be understood that in at least a portion of the first blocks 121 of the conductive plate 12 , the plurality of first blocks 121 of the portion are distributed in sequence along the circumferential direction Z.

[0179] As an example, the retaining frame 111 is provided with a plurality of magnetic steels 112 distributed along the circumferential direction Z. Among the plurality of first sub-blocks 121 sequentially distributed along the circumferential direction Z, each first sub-block 121 may cover the corresponding magnetic steels 112 .

[0180] For the third type, see Fig.15 At least part of the first blocks 121 are distributed in sequence along the radial direction Y of the rotor 10 .

[0181] It can be understood that in at least a portion of the first blocks 121 of the conductive plate 12 , the plurality of first blocks 121 of the portion are distributed in sequence along the radial direction Y.

[0182] Such a configuration makes the structural shape design of the conductive plate 12 very flexible, so that the eddy current loss can be reduced in a targeted manner, and the heat dissipation capacity can be improved in a targeted manner. In this way, the torque density of the motor 100 is improved.

[0183] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. The rotor 10 further includes a magnetic conductive plate 13. Along the axial direction X of the rotor 10, at least one side of the retaining frame 111 is provided with a magnetic conductive plate 13.

[0184] The magnetic conductive plate 13 is a component having magnetic conductive properties.

[0185] By arranging a magnetic conductive plate 13 on at least one side of the retaining frame 111, the magnetic conductive plate 13 can shield the spatial harmonic magnetic field of the stator 20, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the rotor 10, thereby reducing the eddy current loss of the motor 100, which helps to improve the torque density of the motor 100.

[0186] Among some possible designs, such as Figures 6 to 8 As shown, on the projection plane of the rotor 10 perpendicular to the first direction, the projection of the magnetic conductive plate 13 covers the projection of the retaining frame 111 and the projection of the magnetic steel 112. In this way, the magnetic conductive plate 13 can shield the spatial harmonic magnetic field to reduce the eddy current loss caused by the spatial harmonic magnetic field on the magnetic steel 112, and when the retaining frame 111 is set as a metal structure, the magnetic conductive plate 13 can also reduce the eddy current loss caused by the spatial harmonic magnetic field on the retaining frame 111.

[0187] Or, in some other possible designs, such as Fig. 9 and Fig.10 As shown, on the projection plane of the rotor 10 perpendicular to the first direction, the projection of the magnetic conductive plate 13 covers the projection of the magnetic steel 112, but does not cover the projection of the retaining frame 111. In this way, the magnetic conductive plate 13 can shield the spatial harmonic magnetic field to reduce the eddy current loss caused by the spatial harmonic magnetic field on the magnetic steel 112.

[0188] Alternatively, in some possible designs, on the projection plane of the rotor 10 perpendicular to the first direction, the projection of the magnetic conductive plate 13 covers the projection of the retaining frame 111, but does not cover the projection of the magnetic steel 112. In this way, the magnetic conductive plate 13 can shield the spatial harmonic magnetic field, so that when the retaining frame 111 is set as a metal structure, the eddy current loss caused by the spatial harmonic magnetic field on the retaining frame 111 can be reduced.

[0189] In some embodiments, please refer to Figures 11 to 14 , and in combination with other drawings. Along the axial direction X of the rotor 10 , one side of the rotor 10 is the stator side 101 , and a magnetic conductive plate 13 is provided on one side of the retaining frame 111 close to the stator side 101 .

[0190] Such an arrangement enables the magnetic conductive plate 13 to be as close to the stator 20 as possible, thereby effectively shielding the spatial harmonic magnetic field, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the rotor 10 , and helping to improve the torque density of the motor 100 .

[0191] In some embodiments, please refer to Figures 11 to 14 , and in combination with other drawings. Along the axial direction X of the rotor 10 , the conductive plate 12 is disposed on a side of the magnetic conductive plate 13 away from the stator side 101 .

[0192] Such an arrangement enables the magnetic conductive plate 13 to shield the spatial harmonic magnetic field, thereby reducing the eddy current loss caused by the spatial harmonic magnetic field on the conductive plate 12 .

[0193] In some embodiments, please refer to Figures 6 to 10 , and in combination with other drawings. Along the axial direction X of the rotor 10 , the rotor 10 has magnetic conductive plates 13 on both opposite sides.

[0194] It can be understood that the rotor 10 may include at least two groups of magnetic conductive plates 13, each group of magnetic conductive plates 13 includes at least one magnetic conductive plate 13. The two groups of magnetic conductive plates 13 are sequentially distributed along the axial direction X, and all the retaining frames 111 and all the magnetic steels 112 of the rotor 10 are located between the two groups of magnetic conductive plates 13.

[0195] In this way, the rotor 10 is provided with magnetic conductive plates 13 on two opposite sides along the axial direction X, so that the spatial harmonic magnetic field can be shielded to a greater extent to reduce eddy current losses.

[0196] In some embodiments, please refer to Fig. 9 , Fig.10 , Fig.16 and Fig.17 , and combined with other drawings. Among them, Fig.16 A schematic diagram of a magnetic conductive plate 13 of a rotor 10 provided in some embodiments of the present application, Fig.17 Schematic diagram of the magnetic conductive plate 13 of the rotor 10 provided in some other embodiments of the present application. The magnetic conductive plate 13 includes a plurality of second segments 131 .

[0197] The second block 131 is a partial structure of the guiding magnetic plate 13 .

[0198] The plurality of second blocks 131 of the magnetic conductive plate 13 may be arranged in at least one of the following three ways:

[0199] First, see Fig.10 At least part of the second blocks 131 are distributed in sequence along the circumferential direction Z of the rotor 10 .

[0200] It can be understood that in at least a portion of the second blocks 131 of the magnetic conductive plate 13 , the plurality of second blocks 131 of the portion are distributed in sequence along the circumferential direction Z.

[0201] As an example, the retaining frame 111 is provided with a plurality of magnetic steels 112 distributed along the circumferential direction Z. Among the plurality of second blocks 131 sequentially distributed along the circumferential direction Z, each second block 131 can cover the corresponding magnetic steels 112 .

[0202] For the second one, see Fig.16 At least part of the second blocks 131 are distributed in sequence along the axial direction X of the rotor 10 .

[0203] It can be understood that in at least a portion of the second blocks 131 of the magnetic conductive plate 13 , the plurality of second blocks 131 of the portion are distributed in sequence along the axial direction X.

[0204] For the third type, see Fig.17 At least part of the second blocks 131 are distributed in sequence along the radial direction Y of the rotor 10 .

[0205] It can be understood that in at least a portion of the second blocks 131 of the magnetic conductive plate 13 , the plurality of second blocks 131 of the portion are distributed in sequence along the radial direction Y.

[0206] Such an arrangement makes the structural shape design of the magnetic conductive plate 13 very flexible, so that the eddy current loss can be reduced in a targeted manner. In this way, the inter-pole magnetic leakage of the magnetic steel 112 can be reduced, which helps to improve the output torque of the motor 100.

[0207] In some embodiments, please refer to Figures 18 to 20 , and combined with other drawings. Among them, Fig.18 A three-dimensional structural diagram of the magnetic steel 112 of the rotor 10 provided in some embodiments of the present application, Fig.19 The three-dimensional structure diagram of the magnetic steel 112 of the rotor 10 provided in some other embodiments of the present application is shown in FIG. Fig. 20 The three-dimensional structure diagram of the magnetic steel 112 of the rotor 10 provided in some other embodiments of the present application. The magnetic steel 112 includes a plurality of third blocks 1121 .

[0208] The third block 1121 is a partial structure of the magnetic steel 112 .

[0209] The plurality of third blocks 1121 of the magnetic steel 112 may be arranged in at least one of the following three ways:

[0210] First, see Fig.18 , and in combination with other drawings. At least part of the third blocks 1121 are distributed in sequence along the radial direction Y of the rotor 10 .

[0211] It can be understood that, in at least a portion of the third blocks 1121 of the magnetic steel 112 , the plurality of third blocks 1121 of the portion are distributed in sequence along the radial direction Y.

[0212] For the second one, see Fig.19 , and in combination with other drawings. At least part of the third blocks 1121 are distributed in sequence along the axial direction X of the rotor 10 .

[0213] It can be understood that in at least a portion of the third blocks 1121 of the magnetic steel 112 , the plurality of third blocks 1121 of the portion are distributed in sequence along the axial direction X.

[0214] For the third type, see Fig. 20 , and in combination with other drawings. At least part of the third blocks 1121 are distributed in sequence along the circumferential direction Z of the rotor 10 .

[0215] It can be understood that in at least a portion of the third blocks 1121 of the magnetic steel 112 , the plurality of third blocks 1121 of the portion are distributed in sequence along the circumferential direction Z.

[0216] By dividing the magnetic steel 112 into a plurality of third blocks 1121 , the eddy current path inside the magnetic steel 112 can be blocked, which helps to reduce eddy current loss.

[0217] It should be supplemented here that, among the multiple third blocks 1121 of the magnetic steel 112, two adjacent third blocks 1121 can be arranged at intervals to achieve insulation through air; or, two adjacent third blocks 1121 can also be provided with an insulating layer to achieve mutual insulation through insulation.

[0218] Please also read Figures 2 to 5 , and in combination with other drawings, the motor 100 provided in the embodiment of the present application includes a rotor 10. The rotor 10 in this embodiment is the same as the rotor 10 in the previous embodiment. For details, please refer to the relevant description of the rotor 10 in the previous embodiment, which will not be repeated here.

[0219] The motor 100 provided in the embodiment of the present application can reduce the eddy current loss of the motor 100 by adopting the rotor 10 involved in the above embodiments, which helps to improve the torque density of the motor 100.

[0220] See also Figure 1 , and in combination with other drawings, the powertrain 1000 provided in the embodiment of the present application includes a motor 100. The motor 100 in this embodiment is the same as the motor 100 in the previous embodiment. For details, please refer to the relevant description of the motor 100 in the previous embodiment, which will not be repeated here.

[0221] The power assembly 1000 provided in the embodiment of the present application helps to improve the power of the power assembly 1000 by adopting the motor 100 involved in the above embodiments.

[0222] See also Figure 1 , and in combination with other drawings, the electric device provided in the embodiment of the present application includes a motor 100 or a power assembly 1000. Among them, the motor 100 and the power assembly 1000 in this embodiment are the same as the motor 100 and the power assembly 1000 in the previous embodiment. For details, please refer to the relevant description of the motor 100 and the power assembly 1000 in the previous embodiment, which will not be repeated here.

[0223] The electric device provided in the embodiment of the present application helps to improve the power of the electric device by adopting the motor 100 or the power assembly 1000 involved in the above embodiments.

[0224] As one of the embodiments of this application, Figures 6 to 8 As shown, the rotor 10 includes a magnetic conductive plate 13, a conductive plate 12 and two rotor structures 11. Along the axial direction X of the motor 100, the two rotor structures 11 are distributed in sequence, the conductive plate 12 is arranged between the two rotor structures 11, and a magnetic conductive plate 13 is arranged on the side of each rotor structure 11 away from the conductive plate 12. The rotor structure 11 includes a retaining frame 111 and a plurality of magnetic steels 112, and the plurality of magnetic steels 112 are distributed on the retaining frame 111 along the circumferential direction Z. Moreover, on the projection plane of the rotor 10 perpendicular to the axial direction X, the projection of the magnetic conductive plate 13 covers the projection of the magnetic steel 112, and the projection of the conductive plate 12 covers the projection of the magnetic steel 112.

[0225] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A rotor, characterized in that: include: Cage; A magnetic steel, arranged on the retaining frame; A conductive plate is provided on at least one side of the retaining frame along the axial direction of the rotor.

2. The rotor according to claim 1, characterized in that Along the axial direction of the rotor, one side of the rotor is the stator side, and the conductive plate is provided on a side of the retaining frame away from the stator side.

3. The rotor according to claim 1 or 2, characterized in that: The conductive plate is provided on at least one side of the magnetic steel along the axial direction of the rotor.

4. The rotor according to claim 3, characterized in that Along the axial direction of the rotor, one side of the rotor is the stator side, and the conductive plate is provided on a side of the magnetic steel away from the stator side.

5. The rotor according to any one of claims 1 to 4, characterized in that: The retaining frame is provided with a magnetic steel groove, and at least a portion of the magnetic steel is arranged in the magnetic steel groove.

6. The rotor according to any one of claims 1 to 5, characterized in that: The magnetic steel is provided on a side of the conductive plate away from the retaining frame along the axial direction of the rotor.

7. The rotor according to any one of claims 1 to 6, characterized in that: The rotor includes a plurality of rotor structures, and the rotor structure includes the retaining frame and the magnetic steel arranged on the retaining frame; Along the axial direction of the rotor, a plurality of the rotor structures are arranged in sequence, and the conductive plate is provided between two adjacent rotor structures.

8. The rotor according to any one of claims 1 to 7, characterized in that: On a projection plane perpendicular to the axial direction of the rotor, the projection of the conductive plate covers the projection of the magnetic steel and / or the projection of the retaining frame.

9. The rotor according to any one of claims 1 to 8, characterized in that: At least a portion of the conductive plate is a metal structure.

10. The rotor according to any one of claims 1 to 9, characterized in that: The conductive plate includes a plurality of first blocks; at least part of the first blocks are distributed sequentially along the axial direction of the rotor, and / or at least part of the first blocks are distributed sequentially along the radial direction of the rotor, and / or at least part of the first blocks are distributed sequentially along the circumferential direction of the rotor.

11. The rotor according to any one of claims 1 to 10, characterized in that: The rotor further comprises a magnetic conductive plate; along the axial direction of the rotor, at least one side of the retaining frame is provided with the magnetic conductive plate.

12. The rotor according to claim 11, characterized in that Along the axial direction of the rotor, one side of the rotor is the stator side, and the magnetic conductive plate is provided on a side of the retaining frame close to the stator side.

13. The rotor according to claim 11 or 12, characterized in that Along the axial direction of the rotor, opposite sides of the rotor are provided with the magnetic conductive plates.

14. The rotor according to any one of claims 11 to 13, characterized in that: The magnetic conductive plate includes a plurality of second blocks; at least part of the second blocks are distributed in sequence along the axial direction of the rotor, and / or at least part of the second blocks are distributed in sequence along the radial direction of the rotor, and / or at least part of the second blocks are distributed in sequence along the circumferential direction of the rotor.

15. The rotor according to any one of claims 1 to 14, characterized in that: The magnetic steel includes a plurality of third blocks; at least part of the third blocks are distributed sequentially along the axial direction of the rotor, and / or at least part of the third blocks are distributed sequentially along the radial direction of the rotor, and / or at least part of the third blocks are distributed sequentially along the circumferential direction of the rotor.

16. A motor, characterized in that: Comprising a rotor according to any one of claims 1-15.

17. A powertrain, characterized in that: Comprising an electric machine according to claim 16.

18. An electric device, characterized in that: Includes the motor according to claim 16; or includes the powertrain according to claim 17.

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