Motor and electrical equipment

Abstract

The invention provides a motor and electrical equipment. The motor comprises a stator, the stator comprises a stator iron core and a winding, and the stator iron core comprises a stator yoke; the plurality of stator teeth are arranged at intervals around the axis of the stator, each stator tooth comprises a main tooth, the main tooth is connected with the peripheral side wall of the stator yoke, the main tooth comprises a tooth boot, and the winding is wound on the main tooth; the at least two auxiliary teeth are arranged on the tooth boot; the rotor can rotate relative to the stator, the rotor comprises a support and a plurality of permanent magnets, the support is provided with a plurality of magnet grooves, the plurality of magnet grooves are arranged around the axis of the rotor at intervals, and one permanent magnet is arranged in each magnet groove; wherein the bracket is a non-magnetic conductive piece.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor and electrical equipment. Background Art

[0002] Permanent magnet brushless DC motors and the like mostly use surface-mounted rotors (i.e., rotors with rotor cores). The electromagnetic air gap in the surface-mounted rotor is large, and the air gap magnetic flux density is relatively low, making it difficult to further improve the output capacity of the motor.

[0003] Related technologies use an internal rotor to increase the fundamental air gap magnetic field strength, thereby improving motor efficiency. However, further increasing the fundamental magnetic field strength in this structure increases motor cost or worsens vibration and noise, thus affecting motor reliability. Furthermore, the improvement in fundamental magnetic field strength is limited, leaving little room for further performance improvement. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present application provides a motor.

[0006] A second aspect of the present application provides an electrical device.

[0007] In view of this, the first aspect of the present application proposes a motor, comprising: a stator, the stator comprising a stator core and a winding, the stator core comprising: a stator yoke; a plurality of stator teeth, the plurality of stator teeth being arranged at intervals around the axis of the stator, each stator tooth comprising: a main tooth, the main tooth being connected to the circumferential side wall of the stator yoke, the main tooth comprising a tooth shoe, the winding being wound around the main tooth; at least two auxiliary teeth being arranged on the tooth shoe; a rotor, the rotor being capable of rotating relative to the stator, the rotor comprising a bracket and a plurality of permanent magnets, the bracket being provided with a plurality of magnet slots, the plurality of magnet slots being arranged at intervals around the axis of the rotor, and a permanent magnet being arranged in each magnet slot; wherein the bracket is a non-magnetic part.

[0008] The present application provides a motor including a stator and a rotor.

[0009] The stator includes a stator core and a winding. The stator core includes a stator yoke and a plurality of stator teeth. Each stator tooth includes a main tooth and at least two auxiliary teeth. The main tooth includes a tooth shoe.

[0010] The rotor includes a bracket and a plurality of permanent magnets.

[0011] When the motor is running, the rotor can cooperate with the stator and output torque.

[0012] The main teeth are mounted on the stator yoke, with their roots connected to the circumferential sidewalls. The teeth extend radially along the stator, and tooth tips are equipped with tooth boots. Furthermore, the windings are wound around the main teeth, and the tooth boots provide a certain degree of positioning, ensuring the windings are securely mounted on the main teeth and preventing them from separating from the stator teeth.

[0013] At least two auxiliary teeth are mounted on the tooth shoe, which serves as a mounting support for the at least two auxiliary teeth, securing and securing them. In addition to providing magnetic conductivity, the auxiliary teeth also function as a modulator, modulating the magnetic field. The presence of multiple auxiliary teeth introduces a significant number of harmonic components into the air gap permeance, significantly improving motor performance. Furthermore, the motor has a simple structure, making it easy to manufacture without significantly increasing motor cost and generating significant vibration and noise.

[0014] Furthermore, the rotor of the present application includes a bracket and multiple permanent magnets, the bracket being provided with multiple magnet slots, each of which is provided with a permanent magnet. The arrangement of the multiple magnet slots can define the matching dimensions of the multiple permanent magnets, thereby ensuring the matching structure of the multiple permanent magnets and the stator. In other words, the bracket serves as a mounting carrier for the multiple permanent magnets and has the function of mounting and fixing the multiple permanent magnets. Since the bracket is a non-magnetic component, that is, the bracket does not have the ability or property of magnetic conductivity, the rotor of the present application is an iron-coreless structure compared to the related art in which a rotor core is provided in the rotor and the rotor core is used to mount and fix the multiple permanent magnets. The new harmonic magnetic field appearing in the air gap magnetic flux cannot generate iron loss on the rotor. In other words, this arrangement can prevent the working harmonics that provide torque in the air gap magnetic flux from generating iron loss in the rotor core while ensuring the assembly dimensions of the rotor and stator, thereby improving the performance of the motor, for example, it is beneficial to improve the efficiency of the motor. Moreover, this arrangement can reduce the production cost of the motor for motors with the same performance as those in the related art.

[0015] It is understandable that the bracket is provided with a magnet slot, and the slot wall of the magnet slot has the function of limiting the permanent magnet, so that the matching dimensions of multiple permanent magnets can be guaranteed, and the matching dimensions of the permanent magnets and the stator can also be guaranteed.

[0016] The motor described above in this application may also have the following additional technical features:

[0017] In some embodiments, optionally, the number of multiple permanent magnets is recorded as n, the n permanent magnets have a total of Pr pairs of permanent magnetic poles, and the number of permanent magnetic poles of each permanent magnet is recorded as Pn, where n = (2×Pr) / Pn, Pn = 1 or Pn = 2k, k is a positive integer, and n is a positive integer.

[0018] In this embodiment, the structure of the permanent magnet is further defined so that the number of the plurality of permanent magnets is denoted as n, the n permanent magnets have a total of Pr pairs of permanent magnetic poles, the number of permanent magnetic poles of each permanent magnet is denoted as Pn, and the relationship between n, Pr, and Pn is defined so as to satisfy: n = (2 × Pr) / Pn, Pn = 1 or Pn = 2k, where k is a positive integer and n is a positive integer. In other words, the number of permanent magnetic poles Pn of each permanent magnet is 1 or a positive even integer (e.g., 2, 4, 6, and 8, etc., not listed here). For example, a single permanent magnet can have one magnetic pole; for example, a single permanent magnet can have two magnetic poles; for example, a single permanent magnet can have four magnetic poles, etc., not listed here.

[0019] When a permanent magnet has an even number of poles, that is, a single permanent magnet is magnetized at multiple levels, this helps reduce the number of permanent magnets used while maintaining the motor's performance, thereby reducing the motor's production cost. Furthermore, when a single permanent magnet is magnetized at multiple levels, it simplifies the assembly of the permanent magnet and the bracket, improving the efficiency of motor assembly and disassembly, thereby reducing the motor's assembly cost.

[0020] In some embodiments, optionally, the number of pole pairs of the winding is recorded as Ps, the number of main teeth is recorded as a, and the number of auxiliary teeth on each main tooth is recorded as x, wherein Ps=|a×x±Pr|.

[0021] In this embodiment, the matching structure of the winding and stator core is further defined, such that the number of winding pole pairs is denoted as Ps, the number of main teeth is denoted as a, and the number of auxiliary teeth on each main tooth is denoted as x. Ps, a, x, and Pr satisfy the following equation: Ps = |a×x±Pr|. The new harmonic components appearing in the air gap flux density can be used as operating harmonics of the motor, providing output torque, thereby effectively improving the motor's torque density.

[0022] In other words, the present application rationally arranges the motor structure so that the tooth boots of the main teeth are provided with at least two auxiliary teeth. The auxiliary teeth then serve as modulation components to achieve magnetic field modulation, introducing a larger number of harmonic components into the air gap flux, significantly improving the motor's performance. Furthermore, Ps, a, x, and Pr satisfy: Ps = │a×x±Pr│. The new harmonic components appearing in the air gap flux density can serve as the motor's operating harmonics, providing output torque for the motor, thereby effectively improving the motor's torque density.

[0023] In some embodiments, optionally, a portion of the bracket opposite to the stator is provided with a plurality of openings, the plurality of openings are spaced apart around the axis of the rotor, and each opening is connected to a magnet slot.

[0024] In this embodiment, the rotor structure is further defined, such that the rotor is provided with multiple openings, the openings being positioned opposite the stator and spaced apart around the rotor axis, with each opening communicating with a magnet slot. In other words, after the permanent magnet is placed in the magnet slot, a portion of the permanent magnet is exposed from the bracket through the opening, ensuring a compatible fit between the permanent magnet and the stator, and providing structural support for effective coordination between the stator and rotor.

[0025] It is understood that the arrangement of the multiple openings and the arrangement of the multiple magnet slots are coordinated, with the multiple openings spaced apart around the rotor axis, the multiple magnet slots spaced apart around the rotor axis, and each opening communicating with a magnet slot. This ensures a proper fit between the multiple permanent magnets and the stator, providing effective and reliable structural support for efficient rotor rotation.

[0026] In some embodiments, optionally, the bracket further includes: an annular portion; a plurality of partitions, the plurality of partitions being arranged at intervals around the axis of the rotor, each partition being connected to the peripheral side wall of the annular portion, a magnet slot being enclosed between two adjacent partitions and the annular portion, and an opening being enclosed between two adjacent partitions.

[0027] In this embodiment, the bracket includes an annular portion and a plurality of partitions. The plurality of partitions are spaced apart and arranged around the axis of the rotor, and any one of the plurality of partitions is connected to the peripheral side wall of the annular portion.

[0028] In the radial direction of the rotor, the circumferential sidewall of the partition includes an inner circumferential wall and an outer circumferential wall, the inner circumferential wall and the outer circumferential wall being arranged opposite each other and spaced apart. When the stator is located within the interior of the rotor, any of the plurality of partitions is connected to the inner circumferential wall of the annular portion. When the rotor is located within the interior of the stator, any of the plurality of partitions is connected to the outer circumferential wall of the annular portion.

[0029] A magnet slot is formed between two adjacent partitions and the annular portion, and an opening is formed between two adjacent partitions. The opening is communicated with the magnet slot.

[0030] Each partition has the function of separating the permanent magnets located on opposite sides of the partition, thereby ensuring the matching dimensions of multiple permanent magnets.

[0031] In some embodiments, optionally, each partition includes: a main body segment connected to the circumferential side wall of the annular segment; a first connecting segment; and a second connecting segment, wherein the main body segment is connected between the first connecting segment and the second connecting segment along the circumference of the rotor, and the first connecting segment and the second connecting segment are both arranged close to the stator.

[0032] In this embodiment, the structure of the partition is further defined, such that the partition includes a main body segment, a first connecting segment, and a second connecting segment. The main body segment has a first side surface and a second side surface disposed opposite each other in the circumferential direction of the rotor. The first connecting segment is connected to the first side surface, and the second connecting segment is connected to the second side surface. That is, along the circumferential direction of the rotor, the main body segment is connected between the first connecting segment and the second connecting segment. In addition, either the first connecting segment or the second connecting segment is disposed closer to the stator, that is, closer to the stator than the annular portion.

[0033] The first and second connecting segments function to limit the displacement of the permanent magnets relative to the magnet slots. For example, along the circumference of the rotor, the spacing between the first and second connecting segments is smaller than the spacing between two adjacent main segments. Specifically, the first and second connecting segments cooperate to radially limit the permanent magnets in the rotor, preventing them from escaping from the magnet slots through the openings and ensuring a proper fit between the permanent magnets and the stator. This provides effective and reliable structural support for the rotor's relative rotation to the stator.

[0034] It can be understood that by reasonably setting the structure of the separator, the separator includes a main section, a first connecting section and a second connecting section, which can limit the permanent magnet along the radial, axial and circumferential directions of the rotor, providing effective and reliable structural support for the bracket to effectively limit the permanent magnet.

[0035] It is understood that the shape of the permanent magnet matches the shape of the partition, that is, the portion of the permanent magnet opposite to the first connecting section and the second connecting section is chamfered. This arrangement can ensure the sinusoidality of the air gap and has a noise reduction effect.

[0036] In some embodiments, optionally, the bracket is provided with a first mounting slot, the stator is provided in the first mounting slot, and the distance from the bracket to the axis of the stator is greater than or equal to the distance from the permanent magnet to the axis of the stator.

[0037] In this embodiment, the matching structure of the rotor and the stator is further defined so that the bracket is provided with a first mounting groove and the stator is provided in the first mounting groove, that is, the motor has a structure of an outer rotor and an inner stator.

[0038] The positional relationship between the axis of the bracket, the permanent magnet, and the stator is defined. Specifically, the distance from the bracket to the axis of the stator is greater than or equal to the distance from the permanent magnet to the axis of the stator. It is understandable that the maximum distance from any point on the bracket to the axis of the stator is greater than or equal to the maximum distance from any point in the permanent magnet to the axis of the stator. That is, along the radial direction of the rotor, the permanent magnet is closer to the axis of the stator than the bracket, or the distance from the permanent magnet to the axis of the stator is equal to that of the bracket. In this way, the bracket will not protrude from the permanent magnet, and the effective matching size of the stator and the rotor can be guaranteed. If a part of the bracket protrudes from the permanent magnet along the radial direction of the rotor, the radial spacing between the stator and the rotor cannot be guaranteed. During the rotation of the rotor, interference between the bracket and the stator is likely to occur, the effective operation of the motor cannot be guaranteed, and the balance of the spacing between the stator and the rotor cannot be guaranteed, which will reduce the performance of the motor.

[0039] In some embodiments, optionally, a plurality of stator teeth enclose a second mounting slot, the rotor is disposed in the second mounting slot, and the distance from the bracket to the outer peripheral wall of the stator is greater than or equal to the distance from the permanent magnet to the outer peripheral wall of the stator.

[0040] In this embodiment, the matching structure of the rotor and the stator is further defined so that a plurality of stator teeth enclose a second mounting slot, and the rotor is arranged in the second mounting slot, that is, the motor has a structure of an outer stator and an inner rotor.

[0041] The positional relationship between the bracket, permanent magnet, and stator axis is defined. Specifically, the distance from the bracket to the outer peripheral wall of the stator is greater than or equal to the distance from the permanent magnet to the outer peripheral wall of the stator. It is understood that the maximum distance from any point on the bracket to the outer peripheral wall of the stator is greater than or equal to the maximum distance from any point on the permanent magnet to the outer peripheral wall of the stator. That is, along the radial direction of the rotor, the permanent magnet is closer to the outer peripheral wall of the stator than the bracket, or the distances from the permanent magnet to the outer peripheral wall of the stator are equal. In this way, the bracket does not protrude beyond the permanent magnet, ensuring effective matching dimensions between the stator and the rotor. If a portion of the bracket protrudes beyond the permanent magnet along the radial direction of the rotor, that is, the distance from the bracket to the outer peripheral wall of the stator is less than the distance from the permanent magnet to the outer peripheral wall of the stator, the radial spacing between the stator and the rotor cannot be maintained, and interference between the bracket and the stator is likely to occur during rotor rotation. This makes it impossible to ensure the effective operation of the motor and the uniformity of the spacing between the stator and the rotor impossible, which can reduce the performance of the motor.

[0042] In some embodiments, the bracket optionally comprises a bulk molding compound piece and / or a polybutylene terephthalate piece.

[0043] In this embodiment, the type of the bracket is further defined, and the bracket includes a bulk molding compound piece and / or a polybutylene terephthalate piece, that is, the bracket includes a bulk molding compound piece, or the bracket includes a polybutylene terephthalate piece, or includes a bulk molding compound piece and a polybutylene terephthalate piece.

[0044] This setting can ensure that the bracket is non-magnetic.

[0045] In some embodiments, optionally, the winding includes a plurality of coils, each coil being wound around one main tooth.

[0046] In this embodiment, the matching structure of the winding and the stator core is further defined so that the winding includes multiple coils, each coil is wound on a main tooth, that is, a concentrated winding structure with single tooth winding is adopted. At this time, the winding end of the motor is smaller, which is conducive to reducing copper loss, and is convenient for modularization and improving production efficiency.

[0047] In some embodiments, optionally, at least two auxiliary teeth of each stator tooth are arranged at intervals along the circumference of the stator, and a groove is enclosed between two adjacent auxiliary teeth and the tooth shoe.

[0048] In this embodiment, the structure of the stator core is further defined, such that at least two auxiliary teeth of each stator tooth are spaced apart along the circumference of the stator, and a groove is enclosed between the tooth shoe and the two adjacent auxiliary teeth. This introduces a large number of harmonic components into the air gap flux. When the permanent magnet magnetomotive force and the harmonic air gap flux interact, new harmonic components appear in the air gap flux density. Based on the emergence of new harmonic components in the air gap flux density, this application further optimizes the pole pair number Ps of the winding, thereby enabling the new harmonic components in the air gap flux density to serve as the operating harmonics of the motor, providing output torque for the motor, thereby effectively improving the torque density of the motor.

[0049] In some embodiments, optionally, two adjacent main teeth and the stator yoke enclose a stator slot, two adjacent tooth shoes enclose a slot opening, and the slot opening is connected to the stator slot; the circumferential width of the slot opening is different from the circumferential width of the groove; and / or the groove is a polygonal groove or an arc-shaped groove.

[0050] In this embodiment, the structure of the stator core is further defined, wherein two adjacent main teeth and the stator yoke enclose a stator slot, and two adjacent tooth shoes enclose a slot opening. That is, the main teeth and the stator yoke of two adjacent stator teeth enclose a stator slot, and the tooth shoes of two adjacent stator teeth enclose a slot opening, and the slot opening is connected to the stator slot.

[0051] The matching structure of the notch and the groove is defined so that the circumferential width of the notch is different from the circumferential width of the groove. That is, along the circumference of the stator, the width of the notch and the width of the groove are not equal. For example, along the circumference of the stator, the width of the groove is denoted as d1, and the width of the notch is denoted as d2, where d1 is greater than d2.

[0052] This changes the uniformity of the auxiliary teeth's distribution around the stator's circumference, reducing the number of air gap permeance cycles. The pole-pair number of each operating harmonic of the air gap flux density is: |Pr±i×Zf|, where i is a natural number (i=0, 1, 2, ...) and Zf is the number of air gap permeance cycles. When the number of air gap permeance cycles decreases, the harmonic components of the flux density generated by modulation increase, generating more operating harmonics and further improving the motor's output torque.

[0053] In addition, this setting can significantly weaken harmonics and reduce the cogging torque of the motor, thereby improving the performance of the motor.

[0054] Furthermore, the groove is a polygonal groove or an arc groove, and the shape of the groove can be designed according to actual conditions. Specifically, the groove can be designed as a polygonal groove, an arc groove, etc. More specifically, the groove can be designed as a square groove, a trapezoidal groove, a triangular groove, or other polygonal grooves.

[0055] In some embodiments, optionally, between two adjacent main teeth, the auxiliary tooth of one main tooth and the auxiliary tooth of the other main tooth enclose a notch.

[0056] In this embodiment, there are at least two auxiliary teeth located at the ends of the tooth shoe. Moreover, in two adjacent main teeth, the auxiliary teeth of one main tooth and the auxiliary teeth of the other main tooth enclose a notch.

[0057] At the notch, the distance from the angle bisector of two adjacent primary teeth to the adjacent secondary teeth is equal. This places the notch midway between two adjacent secondary teeth. This design simplifies the overall structure of the primary teeth and facilitates their manufacturing, thereby improving the manufacturing efficiency of the stator and the entire motor.

[0058] In some embodiments, optionally, the permanent magnet is an arc-shaped permanent magnet, and the polarities of the permanent magnetic poles of two adjacent permanent magnets are different; the permanent magnet is magnetized by concentrated magnetic field.

[0059] In this embodiment, the shape of the permanent magnet is further limited, such that the permanent magnet is an arc-shaped permanent magnet, multiple permanent magnets form a ring structure, and the polarity of two adjacent arc-shaped permanent magnets is different. Specifically, each arc-shaped permanent magnet has 1, 2, or 4 magnetic poles, and the polarity of adjacent magnetic poles is alternately different.

[0060] In addition, the permanent magnet adopts concentrated magnetic magnetization, which can better focus the magnetic field and improve the performance of the motor.

[0061] A second aspect of the present invention provides an electrical device, comprising: the motor as in the first aspect.

[0062] The electrical device provided by the present invention includes the motor as in the first aspect, and therefore has all the beneficial effects of the above-mentioned motor, which will not be described one by one here.

[0063] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0065] Figure 1 A partial structural schematic diagram of a motor according to a first embodiment of the present application is shown;

[0066] Figure 2 A partial structural schematic diagram of a motor according to a second embodiment of the present application is shown;

[0067] Figure 3 A partial structural schematic diagram of a motor according to a third embodiment of the present application is shown;

[0068] Figure 4 A schematic structural diagram of a rotor according to an embodiment of the present application is shown;

[0069] Figure 5 A schematic structural diagram of a permanent magnet according to a first embodiment of the present application is shown;

[0070] Figure 6 FIG2 shows a schematic structural diagram of a permanent magnet according to a second embodiment of the present application;

[0071] Figure 7 FIG2 shows a schematic structural diagram of a permanent magnet according to a third embodiment of the present application;

[0072] Figure 8 A schematic structural diagram of permanent magnet magnetization according to an embodiment of the present application is shown;

[0073] Figure 9 A partial structural schematic diagram of a stator according to an embodiment of the present application is shown;

[0074] Figure 10 A schematic structural diagram of a stator core according to a first embodiment of the present application is shown;

[0075] Figure 11 A schematic structural diagram of a stator core according to a second embodiment of the present application is shown;

[0076] Figure 12 shows an exploded view of a stator core according to a third embodiment of the present application;

[0077] Figure 13 A partial structural schematic diagram of a stator core according to a third embodiment of the present application is shown;

[0078] Figure 14A partial structural schematic diagram of a stator core according to a fourth embodiment of the present application is shown;

[0079] Figure 15 A data comparison chart of iron loss of motors in the present application and related technologies is shown.

[0080] in, Figures 1 to 14 The corresponding relationship between the reference numerals and component names is as follows:

[0081] 1 Motor, 10 Stator, 100 Stator core, 110 Stator yoke, 120 Stator teeth, 122 Main teeth, 124 Tooth shoes, 126 Auxiliary teeth, 130 Second mounting slot, 140 Groove, 150 Stator slot, 160 Notch, 170 Center of stator core, 180 Stack, 182 Yoke segment, 200 Winding, 30 Rotor, 300 Bracket, 310 Magnet slot, 320 Opening, 330 Ring portion, 340 Partition, 342 Main segment, 344 First connecting segment, 346 Second connecting segment, 350 First mounting slot, 400 Permanent magnet. DETAILED DESCRIPTION

[0082] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0083] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0084] Refer to the following Figures 1 to 15 According to some embodiments of the present application, the motor 1 and the electrical equipment.

[0085] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a motor 1 according to some embodiments of the present application includes a stator 10 and a rotor 30 .

[0086] The stator 10 includes a stator core 100 and a winding 200 .

[0087] The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120 .

[0088] A plurality of stator teeth 120 are spaced apart around the axis of the stator 10 .

[0089] Each stator tooth 120 includes a main tooth 122 and at least two auxiliary teeth 126 .

[0090] The main teeth 122 are connected to the circumferential side wall of the stator yoke 110 .

[0091] The main tooth 122 includes a tooth shoe 124 .

[0092] The winding 200 is wound around the main teeth 122 .

[0093] At least two auxiliary teeth 126 are disposed on the tooth shoe 124 .

[0094] The rotor 30 is rotatable relative to the stator 10 .

[0095] The rotor 30 includes a bracket 300 and a plurality of permanent magnets 400 .

[0096] The bracket 300 is provided with a plurality of magnet slots 310 . The plurality of magnet slots 310 are arranged at intervals around the axis of the rotor 30 . A permanent magnet 400 is disposed in each magnet slot 310 .

[0097] The bracket 300 is a non-magnetic component.

[0098] In this embodiment, the motor 1 includes a stator 10 and a rotor 30 .

[0099] The stator 10 includes a stator core 100 and a winding 200 . The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120 . Each stator tooth 120 includes a main tooth 122 and at least two auxiliary teeth 126 . The main tooth 122 includes a tooth shoe 124 .

[0100] The rotor 30 includes a bracket 300 and a plurality of permanent magnets 400 .

[0101] When the motor 1 is running, the rotor 30 can cooperate with the stator 10 and output torque.

[0102] The main teeth 122 are mounted on the stator yoke 110, with their roots connected to the circumferential sidewalls of the stator yoke 110. The main teeth 122 extend radially along the stator 10, and tooth boots 124 are located at the tips of the teeth 122. Furthermore, the windings 200 are wound around the main teeth 122, and the tooth boots 124 provide a positional limit for the windings 200, ensuring they are securely mounted on the main teeth 122 and preventing them from separating from the stator teeth 120.

[0103] At least two auxiliary teeth 126 are mounted on the tooth shoe 124. The tooth shoe 124 serves as a mounting support for the at least two auxiliary teeth 126, securing and securing the at least two auxiliary teeth 126. In addition to providing magnetic conductivity, the auxiliary teeth 126 also function as a modulator, modulating the magnetic field. The presence of multiple auxiliary teeth 126 introduces a significant number of harmonic components into the air gap permeance. This significantly improves the performance of the motor 1. Furthermore, the motor 1 has a simple structure, making it easy to manufacture without significantly increasing the cost of the motor 1 and without generating significant vibration or noise.

[0104] Furthermore, the rotor 30 of the present application includes a bracket 300 and a plurality of permanent magnets 400. The bracket 300 is provided with a plurality of magnet slots 310, each of which is provided with a permanent magnet 400. The arrangement of the plurality of magnet slots 310 can define the matching dimensions of the plurality of permanent magnets 400, thereby ensuring the matching structure of the plurality of permanent magnets 400 and the stator 10. In other words, the bracket 300 serves as a mounting carrier for the plurality of permanent magnets 400, and has the function of mounting and fixing the plurality of permanent magnets 400. Since the bracket 300 is a non-magnetic component, that is, the bracket 300 does not have the ability or property of magnetic conductivity, therefore, compared with the related art in which a rotor core is provided in the rotor and a plurality of permanent magnets are installed and fixed using the rotor core, the rotor 30 of the present application is an iron-coreless structure. The new harmonic magnetic field appearing in the air gap magnetic density cannot generate iron loss on the rotor 30. In other words, this arrangement can prevent the working harmonics that provide torque in the air gap magnetic density from generating iron loss in the rotor 30 core while ensuring the assembly dimensions of the rotor 30 and the stator 10, thereby improving the performance of the motor 1, for example, it is conducive to improving the efficiency of the motor 1. Moreover, this arrangement can reduce the production cost of the motor 1 for motors with the same performance in the related art.

[0105] It is understandable that the bracket 300 is provided with a magnet slot 310, and the slot wall of the magnet slot 310 has the function of limiting the permanent magnet 400, so that the matching dimensions of multiple permanent magnets 400 can be guaranteed, and the matching dimensions of the permanent magnet 400 and the stator 10 can also be guaranteed.

[0106] The motor 1 of the present application includes a bracket 300 and a permanent magnet 400. The bracket 300 is used to support and limit the permanent magnet 400. The bracket 300 is a non-magnetic component. In the related art, the motor includes a rotor core and a permanent magnet. The rotor core is used to support and limit the permanent magnet. Figure 15 As shown, the motor 1 of the present application has greatly reduced iron loss compared with the motor in the related art, so that the performance of the motor 1 is effectively improved.

[0107] In some embodiments, optionally, the number of multiple permanent magnets 400 is recorded as n, the n permanent magnets 400 have a total of Pr pairs of permanent magnetic poles, and the number of permanent magnetic poles of each permanent magnet 400 is recorded as Pn, where n = (2×Pr) / Pn, Pn = 1 or Pn = 2k, k is a positive integer, and n is a positive integer.

[0108] In this embodiment, the structure of the permanent magnet 400 is further defined, so that the number of the plurality of permanent magnets 400 is recorded as n, the n permanent magnets 400 have a total of Pr pairs of permanent magnetic poles, and the number of permanent magnetic poles of each permanent magnet 400 is recorded as Pn. The relationship between n, Pr, and Pn is defined so as to satisfy: n = (2 × Pr) / Pn, Pn = 1 or Pn = 2k, k is a positive integer, and n is a positive integer. In other words, the number of permanent magnetic poles Pn of each permanent magnet 400 is 1 or Pn is a positive even integer (such as 2, 4, 6, and 8, etc., which are not listed here). For example, a single permanent magnet 400 can have one magnetic pole; for example, a single permanent magnet 400 can have two magnetic poles; for example, a single permanent magnet 400 can have four magnetic poles, etc., which are not listed here.

[0109] When the permanent magnet 400 has an even number of poles, that is, a single permanent magnet 400 is magnetized at multiple levels, this helps reduce the number of permanent magnets 400 used while ensuring the performance of the motor 1, thereby reducing the production cost of the motor 1. Furthermore, when a single permanent magnet 400 is magnetized at multiple levels, the assembly of the permanent magnet 400 and the bracket 300 is simplified, which helps improve the efficiency of assembly and disassembly of the motor 1, thereby reducing the assembly cost of the motor 1.

[0110] like Figure 5 As shown, a single permanent magnet 400 can punch one magnetic pole, such as Figure 6 As shown, a single permanent magnet 400 can have two magnetic poles, such as Figure 7 As shown, a single permanent magnet 400 can have four magnetic poles, etc., which are not listed here one by one.

[0111] In some embodiments, optionally, the number of pole pairs of the winding 200 is recorded as Ps, the number of main teeth 122 is recorded as a, and the number of auxiliary teeth 126 on each main tooth 122 is recorded as x, wherein Ps=|a×x±Pr|.

[0112] In this embodiment, the matching structure of the winding 200 and the stator core 100 is further defined, such that the number of pole pairs of the winding 200 is denoted as Ps, the number of main teeth 122 is denoted as a, and the number of auxiliary teeth 126 on each main tooth 122 is denoted as x. Ps, a, x, and Pr satisfy the following equation: Ps = |a×x±Pr|. The new harmonic components appearing in the air gap flux density can be used as operating harmonics of the motor 1, providing output torque for the motor 1, thereby effectively improving the torque density of the motor 1.

[0113] In other words, the present application rationally arranges the structure of motor 1, such that at least two auxiliary teeth 126 are provided on the tooth boots 124 of the primary teeth 122. Furthermore, the auxiliary teeth 126 serve as modulation components to achieve magnetic field modulation, thereby introducing a larger number of harmonic components into the air gap flux density, significantly improving the performance of motor 1. Furthermore, Ps, a, x, and Pr satisfy: Ps = |a×x±Pr|. The new harmonic components appearing in the air gap flux density can serve as operating harmonics of motor 1, providing output torque for motor 1, thereby effectively improving the torque density of motor 1.

[0114] In some embodiments, optionally, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a portion of the bracket 300 facing the stator 10 is provided with a plurality of openings 320 .

[0115] The plurality of openings 320 are spaced apart around the axis of the rotor 30 .

[0116] Each opening 320 communicates with one magnet slot 310 .

[0117] In this embodiment, the structure of the rotor 30 is further defined, such that the rotor 30 is provided with a plurality of openings 320. The plurality of openings 320 are disposed opposite the stator 10 and are spaced apart around the axis of the rotor 30. Each of the plurality of openings 320 is connected to a magnet slot 310. In other words, after the permanent magnet 400 is placed in the magnet slot 310, a portion of the permanent magnet 400 is exposed outside the bracket 300 through the opening 320. This ensures that the permanent magnet 400 and the stator 10 are properly matched, providing structural support for the effective fit between the stator 10 and the rotor 30.

[0118] It is understood that the arrangement positions of the plurality of openings 320 and the arrangement positions of the plurality of magnet slots 310 are coordinated, the plurality of openings 320 are spaced apart around the axis of the rotor 30, the plurality of magnet slots 310 are spaced apart around the axis of the rotor 30, and each opening 320 is connected to a magnet slot 310. This ensures that the plurality of permanent magnets 400 and the stator 10 are properly matched, providing effective and reliable structural support for the efficient rotation of the rotor 30.

[0119] In some embodiments, optionally, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the stent 300 includes an annular portion 330 and a plurality of partitions 340 .

[0120] The plurality of partitions 340 are arranged at intervals around the axis of the rotor 30 .

[0121] Each partition portion 340 is connected to a peripheral side wall of the annular portion 330 .

[0122] A magnet slot is formed between two adjacent partitions 340 and the annular portion 330 , and an opening 320 is formed between two adjacent partitions 340 .

[0123] In this embodiment, the bracket 300 includes an annular portion 330 and a plurality of partitions 340 . The plurality of partitions 340 are spaced apart around the axis of the rotor 30 , and any of the plurality of partitions 340 is connected to a peripheral sidewall of the annular portion 330 .

[0124] In the radial direction of the rotor 30, the circumferential sidewalls of the partitions 340 include an inner circumferential wall and an outer circumferential wall, which are arranged opposite each other and spaced apart. When the stator 10 is located inside the rotor 30, any of the plurality of partitions 340 is connected to the inner circumferential wall of the annular portion 330. When the rotor 30 is located inside the stator 10, any of the plurality of partitions 340 is connected to the outer circumferential wall of the annular portion 330.

[0125] A magnet slot 310 is formed between two adjacent partitions 340 and the annular portion 330 . An opening 320 is formed between two adjacent partitions 340 . The opening 320 is communicated with the magnet slot 310 .

[0126] Each partition 340 has the function of separating the permanent magnets 400 located on opposite sides of the partition 340. The matching dimensions of the plurality of permanent magnets 400 can be ensured.

[0127] In some embodiments, optionally, as Figure 4 As shown, each divider 340 includes a main body segment 342 , a first connecting segment 344 , and a second connecting segment 346 .

[0128] The main body section 342 is connected to the peripheral side wall of the annular portion 330 .

[0129] Along the circumference of the rotor 30 , the main body segment 342 is connected between the first connecting segment 344 and the second connecting segment 346 .

[0130] The first connecting segment 344 and the second connecting segment 346 are both arranged close to the stator 10 .

[0131] In this embodiment, the structure of the partition 340 is further defined, such that the partition 340 includes a main body section 342, a first connecting section 344, and a second connecting section 346. The main body section 342 has a first side surface and a second side surface that are oppositely disposed in the circumferential direction of the rotor 30. The first connecting section 344 is connected to the first side surface, and the second connecting section 346 is connected to the second side surface. That is, along the circumferential direction of the rotor 30, the main body section 342 is connected between the first connecting section 344 and the second connecting section 346. In addition, either the first connecting section 344 or the second connecting section 346 is disposed closer to the stator 10, that is, closer to the stator 10 than the annular portion 330.

[0132] The first connecting segment 344 and the second connecting segment 346 function to limit the displacement of the permanent magnet 400 relative to the magnet slot 310. For example, along the circumference of the rotor 30, the spacing between the first connecting segment 344 and the second connecting segment 346 is smaller than the spacing between two adjacent main segments 342. Specifically, the first connecting segment 344 and the second connecting segment 346 cooperate to radially limit the permanent magnet 400 in the rotor 30, preventing the permanent magnet 400 from escaping from the magnet slot 310 through the opening 320. This ensures a proper fit between the permanent magnet 400 and the stator 10, providing effective and reliable structural support for the rotor 30 to rotate relative to the stator 10.

[0133] It can be understood that by reasonably setting the structure of the partition part 340, the partition part 340 includes a main section 342, a first connecting section 344 and a second connecting section 346, which can limit the permanent magnet 400 in the radial, axial and circumferential directions of the rotor 30, providing effective and reliable structural support for the bracket 300 to effectively limit the permanent magnet 400.

[0134] In some embodiments, optionally, as Figure 4 As shown, the bracket 300 is provided with a first mounting slot 350 .

[0135] The stator 10 is disposed in the first mounting groove 350 .

[0136] The distance between the bracket 300 and the axis of the stator 10 is greater than or equal to the distance between the permanent magnet 400 and the axis of the stator 10 .

[0137] In this embodiment, the matching structure of the rotor 30 and the stator 10 is further defined, so that the bracket 300 is provided with a first mounting groove 350, and the stator 10 is arranged in the first mounting groove 350, that is, the motor 1 has a structure of an outer rotor and an inner stator.

[0138] The positional relationship between the bracket 300, the permanent magnet 400, and the axis of the stator 10 is defined. Specifically, the distance between the bracket 300 and the axis of the stator 10 is greater than or equal to the distance between the permanent magnet 400 and the axis of the stator 10. It is understood that the maximum distance between any point on the bracket 300 and the axis of the stator 10 is greater than or equal to the maximum distance between any point on the permanent magnet 400 and the axis of the stator 10. That is, along the radial direction of the rotor 30, the permanent magnet 400 is closer to the axis of the stator 10 than the bracket 300, or the distance between the permanent magnet 400 and the bracket 300 and the axis of the stator 10 is equal. In this way, the bracket 300 does not protrude beyond the permanent magnet 400, and the effective matching dimensions of the stator 10 and the rotor 30 can be ensured. If a portion of the bracket 300 protrudes from the permanent magnet 400 in the radial direction of the rotor 30, the radial spacing between the stator 10 and the rotor 30 cannot be guaranteed. During the rotation of the rotor 30, interference between the bracket 300 and the stator 10 is likely to occur, and the effective operation of the motor 1 cannot be guaranteed. The balance of the spacing between the stator 10 and the rotor 30 cannot be guaranteed, which will reduce the performance of the motor 1.

[0139] In some embodiments, optionally, as Figure 3 As shown, a plurality of stator teeth 120 enclose a second mounting slot 130 .

[0140] The rotor 30 is disposed in the second mounting groove 130 .

[0141] The distance from the bracket 300 to the outer peripheral wall of the stator 10 is greater than or equal to the distance from the permanent magnet 400 to the outer peripheral wall of the stator 10 .

[0142] In this embodiment, the matching structure of the rotor 30 and the stator 10 is further defined so that the plurality of stator teeth 120 enclose a second mounting slot 130 , and the rotor 30 is disposed in the second mounting slot 130 , that is, the motor 1 has a structure of an outer stator and an inner rotor.

[0143] The positional relationship between the bracket 300, the permanent magnet 400, and the axis of the stator 10 is defined. Specifically, the distance from the bracket 300 to the outer peripheral wall of the stator 10 is greater than or equal to the distance from the permanent magnet 400 to the outer peripheral wall of the stator 10. It is understandable that the maximum distance from any point on the bracket 300 to the outer peripheral wall of the stator 10 is greater than or equal to the maximum distance from any point on the permanent magnet 400 to the outer peripheral wall of the stator 10. That is, along the radial direction of the rotor 30, the permanent magnet 400 is closer to the outer peripheral wall of the stator 10 than the bracket 300, or the distances from the permanent magnet 400 and the bracket 300 to the outer peripheral wall of the stator 10 are equal. In this way, the bracket 300 does not protrude beyond the permanent magnet 400, and the effective matching dimensions of the stator 10 and the rotor 30 can be ensured. If a portion of the bracket 300 protrudes from the permanent magnet 400 in the radial direction of the rotor 30, that is, the distance from the bracket 300 to the outer peripheral wall of the stator 10 is smaller than the distance from the permanent magnet 400 to the outer peripheral wall of the stator 10, then the radial spacing between the stator 10 and the rotor 30 cannot be guaranteed. During the rotation of the rotor 30, interference between the bracket 300 and the stator 10 is likely to occur, and the effective operation of the motor 1 cannot be guaranteed. The balance of the spacing between the stator 10 and the rotor 30 cannot be guaranteed, which will reduce the performance of the motor 1.

[0144] In some embodiments, the bracket 300 optionally includes a bulk molding compound piece and / or a polybutylene terephthalate piece.

[0145] In this embodiment, the type of the bracket 300 is further defined, and the bracket 300 includes a bulk molding compound part and / or a polybutylene terephthalate part, that is, the bracket 300 includes a bulk molding compound part, or the bracket 300 includes a polybutylene terephthalate part, or includes a bulk molding compound part and a polybutylene terephthalate part.

[0146] This configuration can ensure that the bracket 300 is non-magnetic.

[0147] In some other embodiments, the bracket 300 includes a non-magnetic metal member.

[0148] In some embodiments, the winding 200 optionally includes a plurality of coils, each coil being wound around one main tooth 122 .

[0149] In this embodiment, the matching structure of the winding 200 and the stator core 100 is further defined, so that the winding 200 includes multiple coils, each coil is wound on a main tooth 122, that is, a single-tooth-wound concentrated winding 200 structure is adopted. At this time, the end of the winding 200 of the motor 1 is smaller, which is beneficial to reducing copper loss, and is convenient for modularization and improving production efficiency.

[0150] In some embodiments, optionally, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown, at least two auxiliary teeth 126 of each stator tooth 120 are spaced apart along the circumference of the stator 10 .

[0151] A groove 140 is enclosed between two adjacent auxiliary teeth 126 and the tooth shoe 124 .

[0152] In this embodiment, the structure of the stator core 100 is further defined such that at least two auxiliary teeth 126 of each stator tooth 120 are spaced apart along the circumference of the stator 10, and a groove 140 is enclosed between the tooth shoe 124 and two adjacent auxiliary teeth 126, thereby introducing a large number of harmonic components into the air gap flux. Thus, when the permanent magnet magnetomotive force and the air gap flux containing harmonics interact, new harmonic components appear in the air gap flux density. Based on the appearance of new harmonic components in the air gap flux density, the present application further optimizes the pole pair number Ps of the winding 200, thereby enabling the new harmonic components appearing in the air gap flux density to serve as operating harmonics of the motor 1, providing output torque for the motor 1, thereby effectively improving the torque density of the motor 1.

[0153] In some embodiments, optionally, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, two adjacent main teeth 122 and the stator yoke 110 enclose a stator slot 150 .

[0154] Two adjacent tooth shoes 124 enclose a slot 160 .

[0155] The slot opening 160 communicates with the stator slot 150 .

[0156] The circumferential width of the notch 160 is different from the circumferential width of the groove 140 .

[0157] And / or the groove 140 is a polygonal groove or an arc groove.

[0158] In this embodiment, the structure of the stator core 100 is further defined, wherein two adjacent main teeth 122 and the stator yoke 110 enclose a stator slot 150, and two adjacent tooth shoes 124 enclose a slot opening 160. In other words, the main teeth 122 and the stator yoke 110 of two adjacent stator teeth 120 enclose a stator slot 150, and the tooth shoes 124 of two adjacent stator teeth 120 enclose a slot opening 160, and the slot opening 160 communicates with the stator slot 150.

[0159] like Figure 10As shown, the matching structure of the notch 160 and the groove 140 is defined such that the circumferential width of the notch 160 is different from the circumferential width of the groove 140. That is, along the circumference of the stator 10, the width of the notch 160 is not equal to the width of the groove 140. For example, along the circumference of the stator 10, the width of the groove 140 is denoted as d1, and the width of the notch 160 is denoted as d2, where d1 is greater than d2.

[0160] This changes the uniformity of the distribution of the auxiliary teeth 126 in the circumferential direction of the stator 10, thereby reducing the number of air gap permeance cycles. The pole pair number of each operating harmonic of the air gap flux density is: |Pr±i×Zf|, where i is a natural number (i=0, 1, 2, ...), and Zf is the number of air gap permeance cycles. When the number of air gap permeance cycles decreases, the harmonic components of the flux density generated by modulation increase, generating more operating harmonics and further improving the output torque of the motor 1.

[0161] In addition, this configuration can significantly weaken harmonics and reduce the cogging torque of the motor 1 , thereby improving the performance of the motor 1 .

[0162] Furthermore, the groove 140 is a polygonal groove or an arc groove. The shape of the groove 140 can be designed according to actual conditions. Specifically, the groove 140 can be designed as a polygonal groove, an arc groove, etc. More specifically, the groove 140 can be designed as a square groove, a trapezoidal groove, a triangular groove, or other polygonal grooves.

[0163] In some embodiments, optionally, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12 As shown, among two adjacent main teeth 122 , the auxiliary tooth 126 of one main tooth 122 and the auxiliary tooth 126 of the other main tooth 122 enclose a notch 160 .

[0164] In this embodiment, there are at least two auxiliary teeth 126 located at the end of the tooth shoe 124. In addition, between two adjacent main teeth 122, the auxiliary teeth 126 of one main tooth 122 and the auxiliary teeth 126 of the other main tooth 122 enclose a notch 160.

[0165] At the notch 160, the distances from the angle bisectors of two adjacent primary teeth 122 to two adjacent secondary teeth 126 are equal. Thus, the notch 160 is located midway between two adjacent secondary teeth 126. This design simplifies the overall structure of the primary teeth 122 and facilitates their manufacture, thereby improving the manufacturing efficiency of the stator 10 and the entire motor 1.

[0166] In some embodiments, optionally, as Figure 5 、 Figure 6 and Figure 7 As shown, the permanent magnets 400 are arc-shaped permanent magnets, and the polarities of the permanent magnetic poles of two adjacent permanent magnets 400 are different; the permanent magnets 400 are magnetized by concentrated magnetic field.

[0167] In this embodiment, the shape of the permanent magnets 400 is further limited, such that the permanent magnets 400 are arc-shaped permanent magnets 400, multiple permanent magnets 400 form a ring structure, and the polarities of two adjacent arc-shaped permanent magnets 400 are different. Specifically, each arc-shaped permanent magnet 400 has 1, 2, or 4 magnetic poles, and the polarities of adjacent magnetic poles are alternately different.

[0168] In addition, the permanent magnet 400 adopts concentrated magnetic magnetization, which can better focus the magnetic field and improve the performance of the motor 1.

[0169] Figure 8 The arrows in FIG. 4 indicate the magnetization angle and position of the permanent magnet 400 , wherein the magnetization position has a certain distance from the center 170 of the stator core.

[0170] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, an electrical device according to some further embodiments of the present application includes: a motor 1 as in any of the above embodiments.

[0171] In this embodiment, the electrical device includes a motor 1 .

[0172] The motor 1 includes a stator 10 and a rotor 30 .

[0173] The stator 10 includes a stator core 100 and a winding 200 . The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120 . Each stator tooth 120 includes a main tooth 122 and at least two auxiliary teeth 126 . The main tooth 122 includes a tooth shoe 124 .

[0174] The rotor 30 includes a bracket 300 and a plurality of permanent magnets 400 .

[0175] When the motor 1 is running, the rotor 30 can cooperate with the stator 10 and output torque.

[0176] The main teeth 122 are mounted on the stator yoke 110, with their roots connected to the circumferential sidewalls of the stator yoke 110. The main teeth 122 extend radially along the stator 10, and tooth boots 124 are located at the tips of the teeth 122. Furthermore, the windings 200 are wound around the main teeth 122, and the tooth boots 124 provide a positional limit for the windings 200, ensuring they are securely mounted on the main teeth 122 and preventing them from separating from the stator teeth 120.

[0177] At least two auxiliary teeth 126 are mounted on the tooth shoe 124. The tooth shoe 124 serves as a mounting support for the at least two auxiliary teeth 126, securing and securing the at least two auxiliary teeth 126. In addition to providing magnetic conductivity, the auxiliary teeth 126 also function as a modulator, modulating the magnetic field. The presence of multiple auxiliary teeth 126 introduces a significant number of harmonic components into the air gap permeance. This significantly improves the performance of the motor 1. Furthermore, the motor 1 has a simple structure, making it easy to manufacture without significantly increasing the cost of the motor 1 and without generating significant vibration or noise.

[0178] Furthermore, the rotor 30 of the present application includes a bracket 300 and a plurality of permanent magnets 400. The bracket 300 is provided with a plurality of magnet slots 310, each of which is provided with a permanent magnet 400. The arrangement of the plurality of magnet slots 310 can define the matching dimensions of the plurality of permanent magnets 400, thereby ensuring the matching structure of the plurality of permanent magnets 400 and the stator 10. In other words, the bracket 300 serves as a mounting carrier for the plurality of permanent magnets 400, and has the function of mounting and fixing the plurality of permanent magnets 400. Since the bracket 300 is a non-magnetic component, that is, the bracket 300 does not have the ability or property of magnetic conductivity, therefore, compared with the related art in which a rotor core is provided in the rotor and a plurality of permanent magnets are installed and fixed using the rotor core, the rotor 30 of the present application is an iron-coreless structure. The new harmonic magnetic field appearing in the air gap magnetic density cannot generate iron loss on the rotor 30. In other words, this arrangement can prevent the working harmonics that provide torque in the air gap magnetic density from generating iron loss in the rotor 30 core while ensuring the assembly dimensions of the rotor 30 and the stator 10, thereby improving the performance of the motor 1, for example, it is conducive to improving the efficiency of the motor 1. Moreover, this arrangement can reduce the production cost of the motor 1 for motors with the same performance in the related art.

[0179] It is understandable that the bracket 300 is provided with a magnet slot 310, and the slot wall of the magnet slot 310 has the function of limiting the permanent magnet 400, so that the matching dimensions of multiple permanent magnets 400 can be guaranteed, and the matching dimensions of the permanent magnet 400 and the stator 10 can also be guaranteed.

[0180] Optionally, the rotor 30 further includes a bracket 300 , and the bracket 300 is wrapped around the outside of the permanent magnet 400 .

[0181] The bracket 300 is a non-magnetic conductive member.

[0182] Motor 1 includes a stator 10 and a rotor 30. Stator 10 includes a stator core 100 and windings 200. Rotor 30 includes multiple permanent magnets 400, with adjacent permanent magnets 400 having different polarities. During operation, rotor 30 cooperates with stator 10 to generate torque.

[0183] Alternatively, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown, two auxiliary teeth 126 are provided on the main teeth 122. A groove 140 is enclosed between two adjacent auxiliary teeth 126 and the tooth shoe 124. Two adjacent main teeth 122 and the stator yoke 110 enclose a stator slot 150. The winding 200 is located within the stator slot 150. Two adjacent tooth shoes 124 enclose a slot opening 160, which communicates with the stator slot 150. The winding 200 includes multiple coils, each wound around a main tooth 122.

[0184] Along the circumference of the stator 10, the width of the groove 140 is denoted as d1, and the width of the slot 160 is denoted as d2, where d1 is not equal to d2. The groove 140 is a polygonal groove or an arc-shaped groove.

[0185] like Figure 1 and Figure 2 As shown, the motor 1 is an outer rotor motor, and the stator 10 is located inside the rotor 30 .

[0186] like Figure 3 As shown, the motor 1 is an inner rotor motor, and the stator 10 is located outside the rotor 30 .

[0187] The bracket 300 of the rotor 30 is wrapped around the permanent magnet 400 to fix and support the permanent magnet 400. The bracket 300 is a BMC (Bulk Molding Compound) component and / or a PBT (polybutylene terephthalate) component.

[0188] like Figure 5 As shown, a single permanent magnet 400 can magnetize one pole. Figure 6 As shown, a single permanent magnet 400 has two poles. Figure 7 As shown, a single permanent magnet 400 can magnetize four poles. Pn is a positive even integer that can divide 2×Pr.

[0189] like Figure 8 As shown, the permanent magnet 400 is magnetized by concentrated magnetic field, which can better focus the magnetic field and improve the performance of the motor 1.

[0190] At the notch 160 , the distances from the angle bisectors of two adjacent main teeth 122 to two adjacent auxiliary teeth 126 are equal or unequal.

[0191] In two adjacent auxiliary teeth 126 , the angle formed between the tooth body bisector of one auxiliary tooth 126 and the tooth body bisector of the other auxiliary tooth 126 is recorded as β, where 1≤β / (2π / (a×x))<1.4, where a represents the number of main teeth 122 and x represents the number of auxiliary teeth 126 on each main tooth 122.

[0192] The stator 10 includes at least two stacks 180 . Each stack 180 includes a yoke segment 182 and main teeth 122 . The main teeth 122 are arranged on the yoke segment 182 . The yoke segments 182 of two adjacent stacks 180 are connected. The stator yoke 110 includes multiple yoke segments 182 .

[0193] The yoke sections 182 of two adjacent stacking bodies 180 are detachably connected; and / or the stator 10 further includes a fixing member, and the two adjacent stacking bodies 180 are fixed by the fixing member; and / or the two adjacent stacking bodies 180 are welded together; the two adjacent stacking bodies 180 are integrally injection molded.

[0194] The main teeth 122 are detachably connected to the stator yoke 110; and / or the tooth shoes 124 are detachably connected to the main teeth.

[0195] Along the circumference of the stator 10 , sizes of at least two auxiliary teeth 126 are different.

[0196] The tooth shoe 124 is equipped with at least two auxiliary teeth 126. These auxiliary teeth 126 not only serve as magnetic conductors but also as modulators, modulating the magnetic field. The splitting of the primary tooth 122 into at least two auxiliary teeth 126 introduces a greater number of harmonic components into the air gap permeance. This significantly improves the performance of the motor 1. Furthermore, the motor 1 has a simple structure, making it easy to manufacture without significantly increasing its cost and without generating significant vibration or noise.

[0197] The circumferential dimension of the groove 140 between two adjacent auxiliary teeth 126 of the stator 10 is larger than that of the permanent magnet motor 1 used in the related art. That is, the larger dimension of the groove 140 between two adjacent auxiliary teeth 126 of the motor 1 of the present application introduces more harmonic components into the air gap permeance. Thus, when the permanent magnet magnetomotive force and the air gap permeance containing harmonics interact, new harmonic components appear in the air gap flux density.

[0198] Based on the new harmonic components appearing in the air gap magnetic flux, this application further optimizes the pole pair number Ps of the winding 200, so that the new harmonic components appearing in the air gap magnetic flux can be used as the working harmonics of the motor 1, providing output torque for the motor 1, thereby effectively improving the torque density of the motor 1.

[0199] Two adjacent main teeth 122 and the stator yoke 110 enclose a stator slot 150, and the winding 200 is located in the stator slot 150; two adjacent tooth shoes 124 enclose a slot opening 160, and the slot opening 160 is connected to the stator slot 150; wherein, the winding 200 includes multiple coils, each coil is wound on a main tooth 122.

[0200] The winding 200 is wound around the main teeth 122 and received in the stator slots 150. In addition, a slot 160 is formed between the tooth shoes 124 of two adjacent main teeth 122. The slot 160 is connected to the stator slot 150, and the operator can wind the winding 200 around the main teeth 122 through the slot 160.

[0201] Each coil of the winding 200 is wound on only one main tooth 122, i.e., a single-tooth concentrated winding 200 structure is adopted. At this time, the end of the winding 200 of the motor 1 is smaller, which is beneficial to reduce copper loss, and is easy to realize modularization and improve production efficiency.

[0202] The shape of the groove 140 can be designed according to actual conditions. Specifically, the groove 140 can be designed as a polygonal groove, an arc groove, etc. More specifically, the groove 140 can be designed as a square groove, a trapezoidal groove, a triangular groove, or other polygonal grooves.

[0203] The distances between the tooth bisector of the main tooth 122 and the two side walls of the groove 140 are equal. Thus, along the circumference of the stator 10, the groove 140 is located in the middle of the tooth shoe 124. This arrangement simplifies the overall structure of the main tooth 122 and facilitates its processing and manufacturing, thereby improving the processing efficiency of the stator 10 and the entire motor 1.

[0204] The distances from the tooth body bisector of the main tooth 122 to the two side walls of the groove 140 are not equal. In this way, in the circumferential direction of the stator 10, the groove 140 is offset toward one end of the tooth shoe 124. This arrangement can change the air gap permeability distribution, weaken some harmonics, thereby reducing torque pulsation and improving the vibration and noise performance of the motor 1. In addition, when the permanent magnet magnetomotive force and the air gap permeability containing harmonics interact, new harmonic components will appear in the air gap magnetic flux. At this time, at least two auxiliary teeth 126 introduce more harmonic components into the air gap permeability, which significantly improves the performance of the motor 1.

[0205] In two adjacent main teeth 122 , a slot 160 is enclosed between the auxiliary teeth 126 of one main tooth 122 and the auxiliary teeth 126 of the other main tooth 122 . At the slot 160 , the distances from the angle bisector of the two adjacent main teeth 122 to the two adjacent auxiliary teeth 126 are equal or unequal.

[0206] There are at least two auxiliary teeth 126 located at the end of the tooth shoe 124. In addition, between two adjacent main teeth 122, the auxiliary teeth 126 of one main tooth 122 and the auxiliary teeth 126 of the other main tooth 122 enclose a notch 160.

[0207] At the notch 160 , the distances from the angle bisectors of two adjacent primary teeth 122 to two adjacent secondary teeth 126 are equal. Thus, the notch 160 is located midway between two adjacent secondary teeth 126 . This arrangement simplifies the overall structure of the primary teeth 122 and facilitates their manufacture, thereby improving the manufacturing efficiency of the stator 10 and the entire motor 1 .

[0208] At the slot 160, the distances from the angular bisectors of two adjacent main teeth 122 to the two adjacent auxiliary teeth 126 are not equal. In this way, the slot 160 is offset in the direction of the adjacent auxiliary teeth 126, forming an offset setting of the slot 160. This setting can change the air gap permeability distribution, weaken some harmonics, thereby reducing torque pulsation and improving the vibration and noise performance of the motor 1. In addition, more harmonic components are introduced into the air gap permeability; and when the permanent magnet magnetomotive force and the air gap permeability containing harmonics act, new harmonic components will appear in the air gap magnetic flux. At this time, at least two auxiliary teeth 126 introduce more harmonic components into the air gap permeability, so that the performance of the motor 1 is significantly improved.

[0209] Between two adjacent auxiliary teeth 126, the tooth body bisector of one auxiliary tooth 126 forms an angle β with the tooth body bisector of the other auxiliary tooth 126, and satisfies 1≤β / (2π / (ax))<1.4. This application optimizes the structure and distribution of the auxiliary teeth 126 to achieve a larger harmonic amplitude and higher torque generated by modulation of the motor 1, thereby further improving the operating efficiency of the motor 1.

[0210] The stator 10 includes at least two stacks 180, which are stacked together to form the stator 10. Thus, during the manufacturing process of the stator 10, the operator can first perform winding operations on a single stack 180. Compared to related art methods that require winding operations on a single core, the stack 180 proposed in this application provides a larger operating space, which helps reduce the winding difficulty, thereby improving winding efficiency and reducing material costs.

[0211] Furthermore, winding operations and other operations can be performed first on a single stack 180, effectively increasing the number of windings 200 wound and improving the slot fill rate of the winding 200, thereby enhancing the output performance of the applied motor 1. Furthermore, while reducing the winding difficulty, the scrap rate during the winding process can be reduced, thereby reducing waste and improving the cost of the stator 10. Furthermore, the single stack 180 has lower material requirements, which can improve the utilization rate of the core material and thus reduce the material cost of the stator 10.

[0212] The yoke sections 182 of two adjacent stacked bodies 180 are detachably connected, thereby ensuring the assembly and disassembly of the two adjacent stacked bodies 180 .

[0213] Specifically, the stator 10 further includes a first connecting portion and a second connecting portion. The first connecting portion is disposed at the first end of the yoke segment 182, and the second connecting portion is disposed at the second end of the yoke segment 182, with the first and second ends being disposed opposite each other on the yoke segment 182. Furthermore, the structures of the first and second connecting portions match, and the first and second connecting portions cooperate to achieve self-locking. Therefore, during the assembly of the stacked bodies 180, the first and second connecting portions can be used to connect two adjacent stacked bodies 180, including a detachable connection between the two adjacent stacked bodies 180.

[0214] One of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. Furthermore, the shape of the convex portion matches the shape of the concave portion, and the convex portion and the concave portion are detachably connected and self-locking. Specifically, the concave portion includes, but is not limited to, a polygonal groove, a circular groove, or an elliptical groove; the shape of the convex portion matches the shape of the concave portion.

[0215] The stator 10 also includes a fixing member. After two adjacent stacks 180 are joined, the fixing member secures the entire structure, further enhancing the structural stability of the joined stacks 180. Specifically, the fixing member can be an insulating frame, which not only ensures insulation but also secures the stacks 180, further enhancing the insulating frame's function.

[0216] Two adjacent stacked bodies 180 are connected by welding. After the two adjacent stacked bodies 180 are spliced ​​together, the entire structure is fixed by welding, thereby further improving the structural stability of the spliced ​​stacked bodies 180.

[0217] Two adjacent stacked bodies 180 are integrally injection molded. That is, after the two adjacent stacked bodies 180 are spliced ​​together, the overall structure is fixed by further integral injection molding, thereby further improving the structural stability of the spliced ​​stacked bodies 180.

[0218] The main teeth 122 are detachably connected to the stator yoke 110. During the manufacturing process of the stator 10, wire can be first wound on the single stack 180 containing the main teeth 122, and then mounted on the stator yoke 110. This not only facilitates winding and improves the slot fill rate of the motor 1, but also increases the circumferential width of the tooth shoe 124 and reduces the width of the slot 160, thereby preventing the performance of the motor 1 from being affected by an overly large slot 160.

[0219] The tooth shoe 124 is detachably connected to the main teeth 122. Thus, during the manufacturing process of the stator 10, wire winding can be performed first on the single stack 180 containing the main teeth 122, and then the tooth shoe 124 can be installed. This not only facilitates winding and improves the slot fill rate of the motor 1, but also increases the circumferential width of the tooth shoe 124 and reduces the width of the slot 160, thereby preventing the performance of the motor 1 from being affected by an overly large slot 160.

[0220] Along the circumference of the stator 10, at least two auxiliary teeth 126 of unequal sizes exist. This alters the air gap permeance distribution, weakening some harmonics, thereby reducing torque pulsation and improving the vibration and noise performance of the motor 1. Furthermore, this introduces more harmonic components into the air gap permeance. Furthermore, when the permanent magnet magnetomotive force interacts with the air gap permeance containing harmonics, new harmonic components appear in the air gap flux density. In this case, the at least two auxiliary teeth 126 introduce more harmonic components into the air gap permeance, significantly improving the performance of the motor 1.

[0221] The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120. The stator teeth 120 include primary teeth 122 and at least two secondary teeth 126. The primary teeth 122 are mounted on and connected to the stator yoke 110. The tips of the primary teeth 122 are provided with tooth boots 124. Furthermore, the windings 200 are mounted on the primary teeth 122. The tooth boots 124 provide a certain positional restraint for the windings 200, ensuring that they remain firmly on the primary teeth 122. Furthermore, the motor 1 has a simple structure, making it easy to manufacture and producing, and it is also non-vibratory and noise-resistant.

[0222] Along the circumference of the stator 10, the size of the groove 140 between two adjacent auxiliary teeth 126 is d1, and the size of the notch 160 is d2, and d1>d2. In this way, harmonics can be significantly weakened, and the cogging torque of the motor 1 can be reduced, thereby improving the performance of the motor 1.

[0223] Optionally, the electrical appliances include refrigerators, washing machines, air conditioners, etc., which are not listed here one by one.

[0224] In this application, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integrally connected; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0225] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A motor, characterized in that: include: The stator comprises a stator core and a winding, and the stator core comprises: stator yoke; A plurality of stator teeth, the plurality of stator teeth are arranged at intervals around the axis of the stator, each of the stator teeth comprising: A main tooth, wherein the main tooth is connected to a peripheral side wall of the stator yoke, the main tooth comprises a tooth shoe, and the winding is wound around the main tooth; at least two auxiliary teeth, provided on the tooth shoe; A rotor, the rotor being rotatable relative to the stator, the rotor comprising a bracket and a plurality of permanent magnets, the bracket being provided with a plurality of magnet slots, the plurality of magnet slots being arranged at intervals around the axis of the rotor, and each of the magnet slots being provided with one of the permanent magnets; Wherein, the bracket is a non-magnetic conductive part.

2. The motor according to claim 1, characterized in that The number of the multiple permanent magnets is denoted as n, the n permanent magnets have a total of Pr pairs of permanent magnetic poles, and the number of permanent magnetic poles of each permanent magnet is denoted as Pn, wherein n=(2×Pr) / Pn, Pn=1 or Pn=2k, k is a positive integer, and n is a positive integer.

3. The motor according to claim 2, characterized in that The number of pole pairs of the winding is denoted as Ps, the number of the main teeth is denoted as a, and the number of the auxiliary teeth on each main tooth is denoted as x, wherein Ps=|a×x±Pr|.

4. The motor according to any one of claims 1 to 3, characterized in that A portion of the bracket that is disposed opposite to the stator is provided with a plurality of openings, the plurality of openings are arranged at intervals around the axis of the rotor, and each of the openings is communicated with one of the magnet slots.

5. The motor according to claim 4, characterized in that The support also includes: an annular portion; and a plurality of partitions, the plurality of partitions being arranged at intervals around the axis of the rotor, each of the partitions being connected to the peripheral side wall of the annular portion, the magnet slot being enclosed between two adjacent partitions and the annular portion, and the opening being enclosed between two adjacent partitions.

6. The motor according to claim 5, characterized in that Each of the partitions comprises: A main body section connected to the peripheral side wall of the annular portion; a first connecting section; The second connecting section is arranged along the circumference of the rotor, the main section is connected between the first connecting section and the second connecting section, and both the first connecting section and the second connecting section are arranged close to the stator.

7. The electric machine according to any one of claims 1 to 3, characterized in that The bracket is provided with a first mounting groove, the stator is arranged in the first mounting groove, and the distance from the bracket to the axis of the stator is greater than or equal to the distance from the permanent magnet to the axis of the stator.

8. The electric machine according to any one of claims 1 to 3, characterized in that The plurality of stator teeth enclose a second mounting groove, the rotor is arranged in the second mounting groove, and the distance from the bracket to the outer peripheral wall of the stator is greater than or equal to the distance from the permanent magnet to the outer peripheral wall of the stator.

9. The electric machine according to any one of claims 1 to 3, characterized in that The support includes a bulk molding compound part and / or a polybutylene terephthalate part.

10. The electric machine according to any one of claims 1 to 3, characterized in that At least two auxiliary teeth of each stator tooth are arranged at intervals along the circumferential direction of the stator, and a groove is enclosed between two adjacent auxiliary teeth and the tooth shoe.

11. The motor according to claim 10, characterized in that Two adjacent main teeth and the stator yoke enclose a stator slot, and two adjacent tooth shoes enclose a notch, and the notch is connected to the stator slot; The circumferential width of the notch is different from the circumferential width of the groove; and / or The groove is a polygonal groove or an arc groove.

12. The motor according to claim 11, characterized in that In two adjacent main teeth, the auxiliary tooth of one main tooth and the auxiliary tooth of the other main tooth enclose the notch.

13. The electric machine according to any one of claims 1 to 3, characterized in that The permanent magnets are arc-shaped permanent magnets, and the polarities of the permanent magnetic poles of two adjacent permanent magnets are different; The permanent magnet is magnetized by concentrated magnetism.

14. An electrical device, characterized in that: include: An electric machine as claimed in any one of claims 1 to 13.

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