Rotor module, motor and electrical equipment

Abstract

The invention discloses a rotor module, a motor and electrical equipment, and belongs to the technical field of motors. The rotor module comprises a rotor core, first permanent magnets and second permanent magnets, the first permanent magnets and the second permanent magnets are circumferentially and uniformly distributed on the outer wall of the rotor core at intervals and connected with the outer wall of the rotor core, the first permanent magnets are rectangular in the section perpendicular to the axis of the rotor core, and the second permanent magnets are rectangular in the section perpendicular to the axis of the rotor core. The shape of the second permanent magnet in the cross section perpendicular to the axis of the rotor module is fan-shaped, the raw material cost of the permanent magnets is high, waste materials generated in the machining process of the rectangular first permanent magnet are few, and the manufacturing cost of the permanent magnets can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and particularly to a rotor module, a motor, and an electrical device. Background Art

[0002] Permanent magnet motors have many advantages such as high dynamic response ability, high power density, and high control accuracy, and thus are widely used in the industrial field.

[0003] In the related art, sector-shaped tangential permanent magnets and sector-shaped radial permanent magnets are cooperatively arranged on the outer wall of a motor rotor to increase the air-gap magnetic density of the rotor and the power density of the motor.

[0004] The material utilization rate of the sector-shaped permanent magnet is low during the processing process, generating a large amount of waste and high manufacturing costs. Summary of the Invention

[0005] Embodiments of the present disclosure provide a rotor module, a motor, and an electrical device, which can solve the above technical problems existing in the related art. The technical solutions are as follows:

[0006] In a first aspect, a rotor module is provided. The rotor module includes a rotor core, a first permanent magnet, and a second permanent magnet;

[0007] The shape of the first permanent magnet in a cross-section perpendicular to the axis of the rotor core is rectangular. The first permanent magnet is connected to the outer wall of the rotor core, and the magnetic field direction of the first permanent magnet is tangential to the rotor core;

[0008] The shape of the second permanent magnet in a cross-section perpendicular to the axis of the rotor core is sector-shaped. The second permanent magnet is connected to the outer wall of the rotor core, and the magnetic field direction of the second permanent magnet is radial to the rotor core;

[0009] The first permanent magnet and the second permanent magnet are evenly distributed at intervals in the circumferential direction on the outer wall of the rotor core.

[0010] Optionally, the magnetic poles of the adjacent end faces of two adjacent first permanent magnets are the same.

[0011] Optionally, the magnetic field direction of the second permanent magnet between two first permanent magnets with opposite magnetic field directions points along the radial direction of the rotor core towards the axis of the rotor core;

[0012] The magnetic field direction of the second permanent magnet between two first permanent magnets with opposite magnetic field directions points along the radial direction of the rotor core away from the rotor core.

[0013] Optionally, the side walls of the adjacent first permanent magnet and the second permanent magnet are in contact with each other.

[0014] Optionally, the length of the first permanent magnet in the radial direction of the rotor core is greater than the length of the second permanent magnet in the radial direction of the rotor core.

[0015] In a second aspect, the present disclosure provides a motor, which includes a stator module and the rotor module described in any one of the first aspect, and the stator module is sleeved on the periphery of the rotor module.

[0016] Optionally, the stator module includes a plurality of stator units, each stator unit includes a stator core, an insulating member and a winding. The stator core includes a stator yoke and stator teeth, the stator teeth are connected to the stator yoke, the insulating member is sleeved on the outer wall of the stator core, and the winding is wound on the outer wall of the insulating member;

[0017] The plurality of stator units are arranged in a ring, and the stator yokes in adjacent stator units are connected.

[0018] Optionally, the width of the stator teeth gradually decreases from the end away from the axis of the stator core to the end close to the axis of the stator core.

[0019] Optionally, the stator unit further includes a wire holder, the wire holder is located between the target end face of the stator core and the winding, the target end face is the end face of the stator core perpendicular to the axis of the stator module, and the wire holder is connected to the stator core.

[0020] Optionally, the stator unit further includes a connecting member, and the connecting member is connected to the wire holder and the end of the winding.

[0021] In a third aspect, the present disclosure provides an electrical equipment, which includes the motor described in any one of the second aspect.

[0022] The beneficial effects brought by the technical solutions provided in the embodiments of the present disclosure at least include:

[0023] In the embodiments of the present disclosure, in the rotor module, the first permanent magnet and the second permanent magnet are evenly distributed at intervals in the circumferential direction on the outer wall of the rotor core. Among them, the shape of the first permanent magnet in the cross-section perpendicular to the axis of the rotor core is rectangular, and the shape of the second permanent magnet in the cross-section perpendicular to the axis of the rotor module is fan-shaped. The raw material cost of the permanent magnet is relatively high. Compared with the technology that all uses fan-shaped permanent magnets, in this solution, a rectangular first permanent magnet is used, and less waste is generated during the processing process, which can reduce the manufacturing cost of the permanent magnet.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of a rotor module provided by an embodiment of the present disclosure;

[0027] Figure 2 is a schematic structural diagram of a rotor core provided by an embodiment of the present disclosure;

[0028] Figure 3 is a schematic cross-sectional view of a rotor module provided by an embodiment of the present disclosure;

[0029] Figure 4 is a schematic structural diagram of a second permanent magnet provided by an embodiment of the present disclosure;

[0030] Figure 5 is a schematic structural diagram of an electric motor provided by an embodiment of the present disclosure;

[0031] Figure 6 is a schematic structural diagram of a stator core provided by an embodiment of the present disclosure;

[0032] Figure 7 is an assembly schematic diagram of an insulating member and a stator core provided by an embodiment of the present disclosure;

[0033] Figure 8 is a schematic structural diagram of a winding provided by an embodiment of the present disclosure;

[0034] Figure 9 is an exploded schematic diagram of a stator unit provided by an embodiment of the present disclosure;

[0035] Figure 10 is a partial schematic diagram of a stator core provided by an embodiment of the present disclosure.

[0036] Reference numerals:

[0037] rotor module 1, rotor core 11, receiving groove 11a, first permanent magnet 12, second permanent magnet 13;

[0038] stator module 2, stator unit 20, stator core 21, stator yoke 211, connecting structure 211a, stator teeth 212, target end face 21a;

[0039] insulating member 22, winding 23, winding end 23a, wire holder 24, connecting member 25. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0041] I. Rotor module 1

[0042] The embodiment of the present disclosure provides a rotor module 1, and the rotor module 1 may include a rotor core 11, a first permanent magnet 12, and a second permanent magnet 13.

[0043] The number of pole pairs of a rotor refers to the total number of magnetic poles on the rotor. The number of pole pairs of the rotor determines the rotational speed and output power of the motor. In an AC motor, the number of pole pairs is inversely proportional to the rotational speed of the motor, that is, the more the number of pole pairs, the lower the rotational speed; the fewer the number of pole pairs, the higher the rotational speed. At the same time, the number of pole pairs also affects the output power of the motor. Generally, the more the number of pole pairs, the higher the output power of the motor.

[0044] In the present disclosure, the number of pole pairs of the rotor module 1 may be 8P or 10P, where P is a positive integer. The present disclosure does not specifically limit the number of pole pairs of the rotor module 1, and it can be matched and set according to factors such as the rotational speed and power of the motor.

[0045] The following will introduce each component of the rotor module 1 separately:

[0046] 1.1 Rotor core 11

[0047] In some embodiments, the rotor core 11 may include a plurality of core laminations. The plurality of core laminations may be arranged perpendicular to the axis direction of the rotor core 11 and separated by an insulating material; the plurality of core laminations may also be obliquely mounted on the shaft of the rotor core 11. This inclined core structure can increase the radial length of the rotor core 11, increase the effective cross-sectional area of the rotor core 11, improve the magnetic flux density of the magnetic circuit, and the power density of the rotor module 1.

[0048] The present disclosure does not specifically limit the material of the core lamination, and it can be matched and selected according to the design requirements and application scenarios of the motor. For example: the core lamination can be a silicon steel sheet. The silicon steel sheet has the characteristics of high resistivity and low magnetic permeability, which can effectively reduce the eddy current loss and hysteresis loss in the rotor core 11 and improve the efficiency of the motor; the core lamination can also be made of aluminum alloy. The aluminum alloy has good thermal conductivity and lightweight characteristics, and is suitable for the rotor core 11 with high-speed rotation, which can improve the power density and heat dissipation capacity of the motor.

[0049] In some embodiments, as Figure 2 shown, Figure 2FIG. 0 is a schematic structural view of a rotor core 11 provided by an embodiment of the present disclosure. The outer wall of the rotor core 11 has a receiving groove 11a, which can be connected to the first permanent magnet 12. The size of the receiving groove 11a is adapted to the size of the first permanent magnet 12. The receiving groove 11a facilitates the positioning and installation of the first permanent magnet 12 and reduces the installation difficulty of the rotor module 1.

[0050] The present disclosure does not specifically limit the number of the receiving grooves 11a, which can be matched and set according to the number of the first permanent magnets 12 selected for different rotor modules 1.

[0051] 1.2 The first permanent magnet 12

[0052] As Figure 1 shown, Figure 1 FIG. 1 is a schematic structural view of a rotor module 1 provided by an embodiment of the present disclosure. The shape of the first permanent magnet 12 in a cross-section perpendicular to the axis of the rotor core 11 is rectangular. The rectangular first permanent magnet 12 has a simple processing technology and generates less waste during the processing (such as mechanical cutting). That is, more rectangular first permanent magnets 12 can be obtained by processing the permanent magnet raw materials of the same shape and volume. Since the cost of the permanent magnet raw materials is relatively high, the use of the rectangular first permanent magnet 12 can reduce the manufacturing cost of the first permanent magnet 12. Furthermore, the overall cost of the rotor module 1 can be reduced.

[0053] As Figure 3 shown, Figure 3 FIG. 2 is a schematic cross-sectional view of a rotor module 1 provided by an embodiment of the present disclosure. The shape of the first permanent magnet 12 in a cross-section parallel to the axis of the rotor core 11 is rectangular, and the length of the first permanent magnet 12 in the direction parallel to the axis of the rotor core 11 is adapted to the length of the rotor core 11 in its axis.

[0054] The first permanent magnet 12 is connected to the outer wall of the rotor core 11. The present disclosure does not specifically limit the connection manner between the first permanent magnet 12 and the outer wall of the rotor core 11. The first permanent magnet 12 and the outer wall of the rotor core 11 can be connected by screw fastening. Specifically, the receiving groove 11a on the outer wall of the rotor core 11 has a threaded hole, and the first permanent magnet 12 has a through hole. A fastener (such as a screw, a bolt, etc.) passes through the through hole and is fastened to the threaded hole; the first permanent magnet 12 and the outer wall of the rotor core 11 can also be adhesively connected. Specifically, an adhesive (such as epoxy resin glue, etc.) is provided in the receiving groove 11a on the outer wall of the rotor core 11. The first permanent magnet 12 is inserted into the receiving groove 11a, and the receiving groove 11a, the first permanent magnet 12 and the adhesive are in full contact and adhered together through the adhesive.

[0055] The magnetic field direction of the first permanent magnet 12 is tangential to the rotor core 11. The first permanent magnet 12 can generate a magnetic field and interact with the magnetic field of the winding 23 in the stator module 2, enabling the motor to have higher efficiency and power density. This can improve the performance of the motor and reduce energy consumption to a certain extent.

[0056] In some embodiments, the magnetic poles of the adjacent end faces of two adjacent first permanent magnets 12 are the same. Taking three adjacent first permanent magnets 12 as an example, the N pole of the first permanent magnet 12 in the middle position is opposite to the N pole of the first permanent magnet 12 on one side of it, and the S pole of the first permanent magnet 12 in the middle position is opposite to the S pole of the first permanent magnet 12 on the other side of it.

[0057] The present disclosure does not specifically limit the number of the first permanent magnets 12, which can be matched and set according to factors such as the rotational speed and power of the motor. The number of the first permanent magnets 12 is preferably an even number. The even number of first permanent magnets 12 are evenly distributed on the outer wall of the rotor core 11, which can ensure that the magnetic poles of the adjacent end faces of any two adjacent first permanent magnets 12 are the same, thereby ensuring the force balance of each first permanent magnet 12. The number of poles of the motor is equal to the number of the first permanent magnets 12.

[0058] 1.3 The second permanent magnet 13

[0059] As Figure 1 shown, the shape of the second permanent magnet 13 in the cross-section perpendicular to the axis of the rotor core 11 is fan-shaped. The fan-shaped second permanent magnet 13 can better fit the outer wall of the rotor core 11, increasing the mechanical strength of the connection between the second permanent magnet 13 and the rotor core 11. At the same time, the fan-shaped second permanent magnet 13 can also occupy more area of the outer wall of the rotor core 11, avoiding waste of the outer wall area of the rotor core 11 by the permanent magnet, and thus reducing the efficiency and power density of the motor.

[0060] As Figure 3 shown, the shape of the second permanent magnet 13 in the cross-section parallel to the axis of the rotor core 11 is rectangular, and the length of the second permanent magnet 13 in the direction parallel to the axis of the rotor core 11 is adapted to the length of the rotor core 11 in its axis direction.

[0061] As Figure 4 shown, Figure 4 is a schematic structural diagram of a second permanent magnet 13 provided by an embodiment of the present disclosure. A plurality of second permanent magnets 13 are preferably concentric fan-shaped on the same concentric circle, that is, the centers of a plurality of fan-shaped second permanent magnets 13 are located on the same circumference. At this time, the adjacent end faces of two adjacent second permanent magnets 13 are parallel to each other, and a rectangular first permanent magnet 12 can be placed between two adjacent second permanent magnets 13.

[0062] The second permanent magnet 13 is connected to the outer wall of the rotor core 11. The present disclosure does not specifically limit the connection manner between the second permanent magnet 13 and the outer wall of the rotor core 11. The second permanent magnet 13 and the outer wall of the rotor core 11 can be connected by screw fastening. Specifically, there are threaded holes between the adjacent receiving grooves 11a on the outer wall of the rotor core 11. The second permanent magnet 13 has through holes, and fasteners (such as screws, bolts, etc.) pass through the through holes and are fastened to the threaded holes. The second permanent magnet 13 and the outer wall of the rotor core 11 can also be adhesively connected. Specifically, an adhesive (such as epoxy resin glue, etc.) is provided between the adjacent receiving grooves 11a on the outer wall of the rotor core 11. The second permanent magnet 13 is attached to the outer wall of the rotor core 11 provided with the adhesive, and the outer wall of the rotor core 11, the second permanent magnet 13 and the adhesive are in full contact and adhered together through the adhesive.

[0063] The magnetic field direction of the second permanent magnet 13 between the two first permanent magnets 12 with opposite magnetic field directions points along the radial direction of the rotor core 11 towards the axis of the rotor core 11. When the magnetization directions of two adjacent first permanent magnets 12 are opposite, the direct-axis magnetic density and the magnetic flux direction are along the radial direction of the rotor core 11 towards the axis of the rotor core 11. The magnetic field direction of the second permanent magnet 13 located between the two first permanent magnets 12 with opposite magnetic field directions is also along the radial direction of the rotor core 11 towards the axis of the rotor core 11, which can strengthen the magnetic density of the first permanent magnet 12, thereby increasing the air-gap magnetic density of the rotor module 1 and ultimately enhancing the working performance of the motor.

[0064] The magnetic field direction of the second permanent magnet 13 between the two first permanent magnets 12 with opposite magnetic field directions points along the radial direction of the rotor core 11 away from the rotor core 11. When the magnetization directions of two adjacent first permanent magnets 12 are opposite, the direct-axis magnetic density and the magnetic flux direction are along the radial direction of the rotor core 11 away from the rotor core 11. The magnetic field direction of the second permanent magnet 13 located between the two first permanent magnets 12 with opposite magnetic field directions is also along the radial direction of the rotor core 11 away from the rotor core 11, which can strengthen the magnetic density of the first permanent magnet 12, thereby increasing the air-gap magnetic density of the rotor module 1 and ultimately enhancing the working performance of the motor.

[0065] 1.4 Relationship between the first permanent magnet 12 and the second permanent magnet 13

[0066] As Figure 1As shown, the first permanent magnet 12 and the second permanent magnet 13 are evenly distributed at circumferential intervals on the outer wall of the rotor core 11. That is, there is a second permanent magnet 13 between two adjacent first permanent magnets 12, and there is a first permanent magnet 12 between two adjacent second permanent magnets 13. Such a setting can ensure that the magnetization direction of each second permanent magnet 13 is the same as the direct-axis magnetic density and magnetic flux direction of the two adjacent first permanent magnets 12, strengthen the magnetic density of the first permanent magnet 12, thereby increasing the air-gap magnetic density of the rotor module 1, and ultimately enhancing the working performance of the motor.

[0067] The side walls of the adjacent first permanent magnet 12 and the second permanent magnet 13 are in contact with each other. The multiple second permanent magnets 13 are concentric sector-shaped second permanent magnets 13 on the same concentric circle, that is, the centers of the multiple sector-shaped second permanent magnets 13 are all located on the same circumference. At this time, the adjacent end faces of the two adjacent second permanent magnets 13 are parallel to each other, and a rectangular first permanent magnet 12 can be placed between the two adjacent second permanent magnets 13.

[0068] The width of the first permanent magnet 12 is adapted to the distance between the adjacent end faces of the two adjacent second permanent magnets 13. The side walls of the first permanent magnet 12 and the second permanent magnet 13 are in contact with each other. Specifically: one side wall of the first permanent magnet 12 is in contact with the side wall of an adjacent second permanent magnet 13, and the other side wall of the first permanent magnet 12 is in contact with the side wall of another adjacent second permanent magnet 13. The mutually contacting first permanent magnet 12 and second permanent magnet 13 can enable the second permanent magnet 13 to better enhance the magnetic density of the first permanent magnet 12, reduce the magnetic leakage phenomenon of the rotor module 1, thereby increasing the air-gap magnetic density of the rotor module 1, and ultimately enhancing the working performance of the motor.

[0069] The length of the first permanent magnet 12 in the radial direction of the rotor core 11 is greater than the length of the second permanent magnet 13 in the radial direction of the rotor core 11. When the first permanent magnet 12 and the second permanent magnet 13 are flush on the side pointing away from the rotor core 11 along the radial direction of the rotor core 11, the side of the first permanent magnet 12 pointing towards the axis of the rotor core 11 along the radial direction of the rotor core 11 is closer to the axis of the rotor core 11 than the corresponding side of the second permanent magnet 13.

[0070] The outer wall of the rotor core 11 has a receiving groove 11a, and the size of the receiving groove 11a is adapted to the size of the first permanent magnet 12. That is, the side of the first permanent magnet 12 pointing towards the axis of the rotor core 11 along the radial direction of the rotor core 11 is connected to the bottom of the receiving groove 11a. At the same time, the first permanent magnet 12 and the second permanent magnet 13 are flush on the side pointing away from the rotor core 11 along the radial direction of the rotor core 11. The receiving groove 11a facilitates the positioning and installation of the first permanent magnet 12, and the two adjacent first permanent magnets 12 facilitate the positioning and installation of the second permanent magnet 13 located in the middle of the two, thereby reducing the installation difficulty of the rotor module 1.

[0071] II. Stator Module 2

[0072] The stator module 2 may include a plurality of stator units 20. Each stator unit 20 may include a stator core 21, an insulator 22, and a winding 23. The winding 23 of the stator module 2 may cooperate with the first permanent magnet 12 and the second permanent magnet 13 of the rotor module 1 to achieve the magnetic field interaction between the rotor module 1 and the stator module 2, generating a torque to drive the rotation of the rotor module 1. The plurality of stator units 20 are arranged in a ring, and the stator yokes 211 in adjacent stator units 20 are connected to form the ring structure of the stator module 2.

[0073] 2.1 Stator Core 21

[0074] As Figure 6 shown, Figure 6 is a schematic structural diagram of a stator core 21 provided by an embodiment of the present disclosure. The stator core 21 may include a stator yoke 211 and stator teeth 212, and the stator teeth 212 are connected to the stator yoke 211. The stator yoke 211 is a crossbeam structure connecting the stator teeth 212. The stator yoke 211 can increase the rigidity of the stator core 21 and prevent the stator teeth 212 from falling off due to vibration during high-speed operation. At the same time, the stator yoke 211 is also a support structure for the winding 23 and the insulator 22, which can fix the position of the winding 23 and keep the winding 23 stable during operation without falling off.

[0075] The stator yoke 211 has a connection structure 211a, and a plurality of stator yokes 211 can be connected through the connection structure 211a. The present disclosure does not specifically limit the specific connection method and position of the connection structure 211a. For example, the connection structure 211a can be a snap connection structure, an embedded connection structure, a welding connection structure, etc.

[0076] The stator teeth 212 are tooth-shaped protrusions formed on the stator core 21, which can cooperate with the first permanent magnet 12 and the second permanent magnet 13 of the rotor module 1 to achieve the magnetic field interaction between the rotor module 1 and the stator module 2, generating a torque to drive the rotation of the rotor module 1.

[0077] The width of the stator teeth 212 gradually decreases from the end far from the axis of the stator core 21 to the end close to the axis of the stator core 21. The cross-section of the stator teeth 212 in the direction perpendicular to the axis of the stator module 2 is trapezoidal. The trapezoidal stator teeth 212 can reduce the magnetic density at the stator teeth 212, reduce the iron loss of the stator module 2, and improve the motor efficiency. At the same time, the trapezoidal stator teeth 212 have a simple manufacturing process and a low manufacturing cost.

[0078] 2.2 Insulator 22

[0079] As Figure 7 shown, Figure 7It is an assembly schematic diagram of an insulating part 22 and a stator core 21 provided by an embodiment of the present disclosure. The insulating part 22 is sleeved on the outer wall of the stator core 21. The shape of the insulating part 22 is adapted to the shape of the stator core 21. The insulating part 22 can ensure the insulation between the stator core 21 and the winding 23, and avoid the exposed conductive wires in the winding 23 due to the damage of the insulating shell of the winding 23, directly contacting the stator teeth 212, thereby causing danger in the use of the motor.

[0080] The present disclosure does not specifically limit the material of the insulating part 22, and it can be selected according to the requirements for the insulation performance of the insulating part 22. For example: nylon material, plastic, rubber, etc.

[0081] 2.3 Winding 23

[0082] As Figure 8 shown, Figure 8 It is a structural schematic diagram of a winding 23 provided by an embodiment of the present disclosure. The winding 23 is a flat wire, and the cross-sectional shape of the flat wire is rectangular. The winding 23 is wound around the outer wall of the insulating part 22. The winding axis of the winding 23 is parallel to the radial direction of the stator module 2, and the winding 23 is in contact with the outer wall of the insulating part 22. The winding 23 has a winding end 23a, and the winding end 23a can be electrically connected to the connecting part 25. The connecting parts 25 between adjacent stator units 20 are electrically connected, thereby realizing the electrical connection between multiple windings 23.

[0083] Using flat wires for the winding 23 can reduce the structural voids formed when the winding 23 is wound on the insulating part 22 and improve the slot fill factor of the stator module 2; at the same time, the contact between flat wires is surface contact, which increases the resistance cross-section of the winding 23, can reduce the thermal resistance, and relieve the heating phenomenon of the stator module 2.

[0084] 2.4 Wire frame 24

[0085] As Figure 9 shown, Figure 9 It is an exploded schematic diagram of a stator unit 20 provided by an embodiment of the present disclosure. The stator unit 20 may further include a wire frame 24. The wire frame 24 is located between the target end face 21a of the stator core 21 and the winding 23. The target end face 21a is the end face of the stator core 21 perpendicular to the axis of the stator module 2, and the wire frame 24 is connected to the stator core 21.

[0086] The present disclosure does not specifically limit the connection method between the wire frame 24 and the stator core 21. For example: the connection method can be a snap connection structure, an embedded connection structure, a welding connection structure, etc.; the present disclosure does not specifically limit the connection position between the wire frame 24 and the stator core 21. The wire frame 24 can be connected to the stator yoke 211 of the stator core 21, and the wire frame 24 can also be connected to the stator teeth 212 of the stator core 21.

[0087] 2.5 Connecting part 25

[0088] As Figure 9 shown, the stator unit 20 may further include a connecting member 25, and the connecting member 25 is connected to the wire holder 24. The present disclosure does not specifically limit the connection manner between the connecting member 25 and the wire holder 24. The two may be detachably connected such as snap connection, embedded connection, threaded connection, etc., or may be non-detachably connected such as welded connection, integrally formed, etc.

[0089] The connection position between the connecting member 25 and the wire holder 24 is adapted to the winding end 23a of the winding 23 in the stator unit 20, and the connecting member 25 is also electrically connected to the winding end 23a. The connecting members 25 between adjacent stator units 20 may be electrically connected, thereby enabling electrical connection between multiple windings 23; the connecting member 25 may also be connected to a circuit board related to motor control, working elements, power supply, etc., and by connecting to the power supply and control circuit, the input of current and the output of control signals are achieved.

[0090] 2.6 Stator unit 20

[0091] In some embodiments, referring to Figure 10 shown, Figure 10 is a partial schematic diagram of a stator core provided by an embodiment of the present disclosure. Three adjacent stator units 20 form a coil unit, and the number of coil units in the stator module 2 is preferably 6N, where N is a positive integer.

[0092] One coil unit includes three windings 23. The winding axes of the windings 23 of adjacent stator units 20 are parallel and the winding directions are opposite. The two connecting members 25 of each stator unit 20 are respectively located on the inner and outer circumferences in the radial direction of the same side wall of the wire holder 24. Specifically: one winding end 23a of the winding 23 of the middle stator unit 20 is electrically connected to the connecting member 25 located on the outer circumference of the wire holder 24, and the connecting member 25 located on the outer circumference of the wire holder 24 of the middle stator unit 20 is electrically connected to the connecting member 25 located on the outer circumference of the wire holder 24 of the stator unit 20 on one side. The connecting member 25 located on the inner circumference of the wire holder 24 of this side of the stator unit 20 may be connected to a circuit board related to motor control, working elements, power supply, etc.; the other winding end 23a of the winding 23 of the middle stator unit 20 is electrically connected to the connecting member 25 located on the inner circumference of the wire holder 24, and the connecting member 25 located on the inner circumference of the wire holder 24 of the middle stator unit 20 is electrically connected to the connecting member 25 located on the inner circumference of the wire holder 24 of the stator unit 20 on the other side. The connecting member 25 located on the outer circumference of the wire holder 24 of this side of the stator unit 20 may be connected to a circuit board related to motor control, working elements, power supply, etc.

[0093] III. Motor

[0094] Based on the same concept, an embodiment of the present disclosure also provides a motor, as shown in FIG. 5, Figure 5 is a schematic structural diagram of a motor provided by an embodiment of the present disclosure. The motor may include a stator module 2 as described in any one of the above embodiments and a rotor module 1 as described in any one of the above embodiments. The stator module 2 is sleeved on the periphery of the rotor module 1. Exemplarily, the motor may be a permanent magnet synchronous motor, a permanent magnet direct current motor, a permanent magnet asynchronous motor, etc.

[0095] IV. Electrical Equipment

[0096] Based on the same concept, an embodiment of the present disclosure also provides an electrical equipment, which may include the motor as described in any one of the above embodiments. Exemplarily, the electrical equipment may be a washing machine, a fan, a drill, an electric bicycle, etc.

[0097] Correspondingly, the advantages of the above motor, including the electrical equipment with such a motor, also have the same advantages, which will not be elaborated here.

[0098] In the description of this specification, the descriptions referring to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure.

[0099] It can be understood that "a plurality of" in the present disclosure means two or more, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0100] Furthermore, it can be understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or importance. In fact, the expressions such as "first" and "second" can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0101] It can be further understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0102] It can be further understood that unless otherwise specified, "connection" and "being connected" include both direct connection without other components between the two, and also include indirect connection with other elements between the two.

[0103] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0104] After considering the specification and practicing the solutions disclosed herein, those skilled in the art will readily think of other embodiments of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0105] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A rotor module (1), characterized in that, The rotor module (1) includes: a rotor core (11), a first permanent magnet (12), and a second permanent magnet (13); The first permanent magnet (12) has a rectangular shape in a cross-section perpendicular to the axis of the rotor core (11). The first permanent magnet (12) is connected to the outer wall of the rotor core (11), and the magnetic field direction of the first permanent magnet (12) is tangential to the rotor core (11); The second permanent magnet (13) has a sector shape in a cross-section perpendicular to the axis of the rotor core (11). The second permanent magnet (13) is connected to the outer wall of the rotor core (11), and the magnetic field direction of the second permanent magnet (13) is radial to the rotor core (11); The first permanent magnet (12) and the second permanent magnet (13) are evenly distributed at circumferential intervals on the outer wall of the rotor core (11).

2. The rotor module (1) according to claim 1, characterized in that, The adjacent end faces of two adjacent first permanent magnets (12) have the same magnetic poles.

3. The rotor module (1) according to claim 2, characterized in that, The magnetic field direction of the second permanent magnet (13) between two first permanent magnets (12) with opposite magnetic field directions points along the radial direction of the rotor core (11) towards the axis of the rotor core (11); The magnetic field direction of the second permanent magnet (13) between two first permanent magnets (12) with opposite magnetic field directions points along the radial direction of the rotor core (11) away from the rotor core (11); 4. The rotor module (1) according to claim 1, characterized in that, The side walls of the adjacent first permanent magnet (12) and the second permanent magnet (13) are in contact.

5. The rotor module (1) according to claim 1, characterized in that, The length of the first permanent magnet (12) in the radial direction of the rotor core (11) is greater than the length of the second permanent magnet (13) in the radial direction of the rotor core (11).

6. An electric motor, characterized in that, The motor includes a stator module (2) and the rotor module (1) according to any one of claims 1 to 5. The stator module (2) is sleeved on the periphery of the rotor module (1).

7. The electric motor according to claim 6, characterized in that, The stator module (2) includes a plurality of stator units (20). Each stator unit (20) includes a stator core (21), an insulating member (22), and a winding (23). The stator core (21) includes a stator yoke (211) and stator teeth (212). The stator teeth (212) are connected to the stator yoke (211). The insulating member (22) is sleeved on the outer wall of the stator core (21), and the winding (23) is wound around the outer wall of the insulating member (22); A plurality of the stator units (20) are arranged in a ring, and the stator yokes (211) in adjacent stator units (20) are connected.

8. The electric motor according to claim 7, characterized in that, The width of the stator teeth (212) gradually decreases from the end away from the axis of the stator core (21) towards the end close to the axis of the stator core (21).

9. The electric motor according to claim 7, characterized in that, The stator unit (20) further includes a wire holder (24). The wire holder (24) is located between the target end face (21a) of the stator core (21) and the winding (23). The target end face (21a) is the end face of the stator core (21) perpendicular to the axis of the stator module (2). The wire holder (24) is connected to the stator core (21).

10. The electric motor according to claim 9, characterized in that, The stator unit (20) further includes a connecting member (25), and the connecting member (25) is connected to the end portions of the wire holder (24) and the winding (23).

11. An electrical equipment, characterized in that, The electrical device includes the motor according to any one of claims 6 to 10.

Images