Distributed winding and magnetic field modulation motor

Abstract

The present invention relates to the technical field of motors, and in particular to a distributed winding and a magnetic field modulation motor. The distributed winding comprises a stator core and a coil assembly; the stator core comprises a stator yoke and a plurality of stator teeth arranged on the periphery of the stator yoke, and a stator slot is formed between every two adjacent stator teeth; the coil assembly comprises winding groups, each winding group is wound between two adjacent stator teeth, and a winding unit is formed between the winding group and the two adjacent stator teeth. The magnetic field modulation motor uses the distributed winding and comprises a rotor housing and an array magnetic steel assembly, the rotor housing is arranged outside the stator core, the array magnetic steel assembly faces the coil assembly, and the array magnetic steel assembly is composed of a plurality of magnetic pole pairs. The distributed winding of the present invention is wound multiple times to solve the problem of an excessively long winding overhang, and the power volume and density can be improved.

Description

Distributed winding and magnetic field modulation motor

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS.

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 27, 2023, with application number 202311834954.8, and invention name “Distributed Winding and Magnetic Field Modulation Motor”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of motors, and in particular to a distributed winding and magnetic field modulation motor. Background Art

[0004] Field modulation motors utilize magnetic field modulation technology to control the motor's torque and speed. Field modulation motors typically use permanent magnets or field windings to generate a magnetic field, and control the magnetic flux to adjust the motor's torque and speed. The motor windings are a component of the motor and consist of two parts: coils and connectors. Coils are copper wire or other conductors wound around an iron core, forming the motor's circuit. Connectors connect the different coils in a specific way to form a loop, enabling the motor's function. The condition of the windings is closely related to the motor's performance, and any damage requires repair or replacement. Technical issues

[0005] Existing motor windings are generally single-winding structures, but the single-winding structure affects the power and volume of the motor due to the excessive length of the winding end, so further improvements are needed to the existing motor winding structure. Technical Solutions

[0006] To solve the above problems, the distributed winding of the present invention is wound multiple times to solve the problem of the winding end being too long, and the distributed winding and magnetic field modulation motor can be improved in terms of power volume and density.

[0007] The above purpose can be achieved by adopting the following technical solutions:

[0008] A distributed winding includes a stator core and a coil assembly, wherein the stator core includes a stator yoke and a plurality of stator teeth arranged on the outer periphery of the stator yoke, and a stator slot is provided between two adjacent stator teeth; the coil assembly includes a winding group, which is wound between two adjacent stator teeth and forms a winding unit between the two adjacent stator teeth.

[0009] The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will become apparent from the description, drawings, and claims. Beneficial effects

[0010] Compared to existing windings, the present invention uses distributed windings. The distributed winding design can optimize the magnetic field distribution of the motor and improve the magnetic flux efficiency, thereby reducing the losses inside the motor and improving the working efficiency of the motor. Compared with concentrated winding motors, distributed winding motors have lower resistance and can therefore reach full speed more quickly during startup, reducing current fluctuations and torque fluctuations during startup and improving the starting performance of the motor. The distributed winding design can make the operating current of the motor in phase with the voltage, improve the power factor, reduce reactive losses, and help reduce the operating cost of the motor. The distributed winding design can make the motor run more smoothly and improve the operating quality of the motor. Multiple windings of the distributed winding can solve the problem of excessively long winding ends and increase power volume and density.

[0011] The magnetic field modulation motor utilizes the aforementioned distributed winding. First, this distributed winding enables precise motor control, thereby optimizing motor performance. Because the coil assembly is arranged between the stator teeth, each winding unit has ample space and independence, enabling it to better respond to changes in the magnetic field and improving the motor's response speed and dynamic performance. Furthermore, the moderate distance between winding units reduces interference between adjacent windings, further enhancing the motor's efficiency. This distributed winding optimizes the motor's torque and power density. Because the windings are evenly distributed between the stator teeth, the motor achieves uniform magnetic pull distribution across the entire rotor, thereby improving the motor's torque density. Furthermore, the independence of the winding units allows for more flexible winding design, maximizing the motor's power density. Furthermore, because each winding unit has an independent magnetic field response, the motor's noise is effectively controlled. The distributed winding of the present invention, when used in a magnetic field modulation motor, enables precise motor control, optimizes performance, and improves torque and power density. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] [Corrected 24.12.2024 according to Rule 91] Figure 1 is a three-dimensional schematic diagram of the distributed winding of the present invention;

[0013] [Corrected 24.12.2024 in accordance with Rule 91] Figure 2 is a schematic structural diagram of an embodiment of the distributed winding in Figure 1;

[0014] [Corrected 24.12.2024 according to Rule 91] Figure 3 is a perspective schematic diagram of the magnetic field modulation motor of the present invention;

[0015] [Corrected 24.12.2024 in accordance with Rule 91] Figure 4 is an exploded schematic diagram of the magnetic field modulation motor in Figure 3;

[0016] [Corrected 24.12.2024 according to Rule 91] Figure 5 is a schematic diagram of part of the structure of the magnetic field modulation motor in Figure 3.

[0017] [Corrected on 24.12.2024 according to Rule 91] Explanation of the accompanying reference numerals: stator core 1, stator yoke 11, stator teeth 12, stator pole shoes 121, stator slots 13, coil assembly 2, winding group 21, A-phase winding 211, B-phase winding 212, C-phase winding 213, rotor housing 3, rotor mounting platform 31, magnet mounting platform 311, magnet mounting slot 312, array magnet assembly 4, magnet body 41, first magnet 411, second magnet 412.

[0018] [Corrected 24.12.2024 pursuant to Rule 91] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the present disclosure.

[0019] [Corrected 24.12.2024 in accordance with Rule 91] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly attached to the other element or there may be an intervening element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intervening element.

[0020] [Corrected 24.12.2024 according to Rule 91] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0021] [Corrected 24.12.2024 in accordance with Rule 91] As shown in Figures 1 and 2, one embodiment of the present invention relates to a distributed winding system comprising a stator core 1 and a coil assembly 2. The stator core 1 comprises a stator yoke 11 and a plurality of stator teeth 12 disposed on the outer periphery of the stator yoke 11, with stator slots 13 disposed between adjacent stator teeth 12. The coil assembly 2 comprises a winding group 21 wound between adjacent stator teeth 12, forming a winding unit with the adjacent stator teeth 12. This embodiment utilizes distributed winding. This distributed winding design can optimize the motor's magnetic field distribution and improve magnetic flux efficiency, thereby reducing internal losses and enhancing motor efficiency. Compared to concentrated winding motors, distributed winding motors have lower resistance, allowing them to reach full speed more quickly during startup, reducing current and torque fluctuations during startup, and improving the motor's starting performance. Distributed winding design ensures that the motor's operating current and voltage are in phase, improving the power factor, reducing reactive power losses, and helping to lower the motor's operating costs. Distributed winding design also makes the motor run more smoothly, reducing noise and vibration caused by unbalanced magnetic fields and currents, and improving the motor's operating quality.

[0022] [Corrected 24.12.2024 according to Rule 91] A stator pole shoe 121 is provided at the end of the stator tooth portion 12. The stator pole shoe 121 protrudes toward one side of the stator slot 13. In this embodiment, the stator pole shoe 121 is used to block the coil assembly 2 and prevent the coil from moving outward during winding, thereby ensuring the stability of the coil.

[0023] [Corrected on 24.12.2024 according to Rule 91] Referring to Figure 2, the winding group 21 includes an A-phase winding 211, a B-phase winding 212 and a C-phase winding 213. The A-phase winding 211, the B-phase winding 212 and the C-phase winding 213 are all arranged on the stator tooth 12. Specifically, the A-phase winding 211 includes multiple A-phase winding branches, the B-phase winding 212 includes multiple B-phase winding branches, and the C-phase winding 213 includes multiple C-phase winding branches; the A-phase winding branch, the B-phase winding branch and the C-phase winding branch are wound in sequence along the radial direction of the stator tooth 12 until they reach the position of the stator pole shoe 121; in this embodiment, the distributed winding is wound multiple times to solve the problem of excessively long winding ends and to improve the power volume density.

[0024] [Corrected 24.12.2024 according to Rule 91] In the above example:

[0025] [Corrected 24.12.2024 according to Rule 91] The A-phase winding 211 is divided into a plurality of branches A1, A2, …, An;

[0026] [Corrected 24.12.2024 according to Rule 91] The B-phase winding 212 is divided into a plurality of branches B1, B2, …, Bn; Modes for Carrying Out the Invention

[0027] [Corrected 24.12.2024 according to Rule 91] The C-phase winding 213 is divided into a plurality of branches C1, C2, …, Cn;

[0028] [Corrected 24.12.2024 according to Rule 91] Wind the A1, B1 and C1 branches to the core in sequence;

[0029] [Corrected 24.12.2024 as per Rule 91] Wind the A2, B2 and C2 branches sequentially to the core.

[0030] [Corrected 24.12.2024 according to Rule 91] Multiple A-phase winding 211 branches are connected in parallel to form A-phase winding 211. Multiple B-phase winding 212 branches are connected in parallel to form B-phase winding 212. Multiple C-phase winding 213 branches are connected in parallel to form C-phase winding 213. In this embodiment:

[0031] [Corrected 24.12.2024 according to Rule 91] Wind the An, Bn and Cn branches in sequence to the core;

[0032] [Corrected 24.12.2024 according to Rule 91] The A1, A2, …, and An branches are connected in parallel to form the A-phase winding 211;

[0033] [Corrected 24.12.2024 according to Rule 91] The branches B1, B2, …, Bn are connected in parallel to form the B-phase winding 212;

[0034] [Corrected 24.12.2024 according to Rule 91] The C1, C2, …, Cn branches are connected in parallel to form the C-phase winding 213.

[0035] [Corrected 24.12.2024 in accordance with Rule 91] Referring to Figures 1 to 5, a magnetic field modulation motor includes the aforementioned distributed winding. Specifically, the magnetic field modulation motor comprises a rotor housing 3 and an array magnetic steel assembly 4. The rotor housing 3 is disposed outside the stator core 1, and the array magnetic steel assembly 4 faces the coil assembly 2. The array magnetic steel assembly 4 comprises multiple magnetic pole pairs, each of which is composed of multiple magnetic steel bodies 41. The magnetization direction of each magnetic steel body 41 varies, and the magnetization angle of each magnetic steel body 41 in each magnetic pole pair forms a 360° angle with the first magnetic steel body 41 of the adjacent magnetic pole pair. The array magnetic steel assembly 4 comprises multiple magnetic pole pairs, each of which has a different magnetization direction angle. This enables the magnetic field to form a complex yet orderly three-dimensional structure in space. The magnetization angle of the first magnetic steel body 41 in each magnetic pole pair forms a 360° angle, enabling the entire magnetization structure to achieve a full-range magnetization effect without blind spots. This not only improves the magnetization effect but also effectively reduces the dead zones in the magnetic field, thereby improving the performance and efficiency of the device.

[0036] [Corrected 24 / 12 / 2024 according to Rule 91] The rotor housing 3 is provided with a rotor mounting platform 31 on its inner diameter. A magnet mounting platform 311 and a magnet mounting slot 312 are provided on the rotor mounting platform 31. The magnet mounting platforms 311 and magnet mounting slots 312 are spaced apart and arranged continuously on the rotor mounting platform 31. The magnet body 41 includes a first magnet 411 and a second magnet 412, spaced apart from each other. The first magnet 411 is mounted on the magnet mounting platform 311, and the second magnet 412 is mounted on the magnet mounting slot 312. The array magnet assembly 4 is a Halbach array. The magnet mounting platforms 311 and magnet mounting slots 312 on the rotor housing 3 achieve precise positioning and orderly arrangement of the magnet assemblies, improving the stability and consistency of the magnetization structure. Furthermore, the continuous arrangement of the magnet assemblies on the rotor mounting platform 31 ensures a more uniform magnetic field distribution, enhancing magnetization efficiency. Furthermore, the above embodiment improves the magnetization efficiency of the motor. By providing a rotor mounting platform 31 on the inner diameter of the rotor housing 3, and providing a magnetic steel mounting platform 311 and a magnetic steel mounting slot 312 on the rotor mounting platform 31, the array magnetic steel assembly 4 can be precisely positioned and fixed on the rotor mounting platform 31. This structure ensures a tight fit between the magnetic steel assembly and the rotor, increases magnetic flux, and thus enhances the magnetization effect of the motor.

[0037] [Corrected 24.12.2024 in accordance with Rule 91] In the above embodiment, the annular Halbach magnet adopts a ring-shaped magnet design, which allows the magnetic field to be concentrated and focused throughout the ring structure. Compared to ordinary magnets, the annular magnet can generate a higher magnetic field strength.

[0038] [Corrected 24.12.2024 in accordance with Rule 91] In the above embodiment, the annular structure of the annular Halbach magnet allows the magnetic field to circulate in a closed loop, thereby reducing the space occupied by the magnet. This makes the annular magnet more convenient to install and use in some situations.

[0039] [Corrected 24 / 12 / 2024 in accordance with Rule 91] In the above embodiment, due to the special design of the annular Halbach magnet, the magnetic field is distributed relatively evenly within the annular path. This means that when the annular magnet is used, the intensity of the magnetic field varies relatively little, which helps to improve the stability of the magnetic field.

[0040] [Corrected 24.12.2024 according to Rule 91] In the above embodiments, the design of the annular Halbach magnet can generate a multipolar magnetic field, enabling more complex magnetic field configurations in specific application scenarios. This provides greater flexibility and operability for experiments and applications with special requirements.

[0041] [Corrected 24.12.2024 in accordance with Rule 91] The magnetic field modulation motor utilizes the aforementioned distributed winding. First, this distributed winding enables precise motor control, thereby optimizing motor performance. Since the coil assembly 2 is arranged between the stator teeth 12, each winding unit has ample space and independence, enabling it to better respond to magnetic field fluctuations and improving the motor's response speed and dynamic performance. Furthermore, the moderate distance between winding units reduces interference between adjacent windings, further enhancing motor efficiency. This distributed winding optimizes the motor's torque and power density. Because the windings are evenly distributed between the stator teeth 12, the motor achieves uniform magnetic pull distribution across the entire rotor, thereby improving torque density. Furthermore, the independence of the winding units allows for more flexible winding design, maximizing the motor's power density. Furthermore, since each winding unit has an independent magnetic field response, motor noise is effectively controlled. The distributed winding system of the present invention, when used in a magnetic field modulation motor, enables precise motor control, optimizes performance, and improves torque and power density.

[0042] [Corrected 24.12.2024 in accordance with Rule 91] The above embodiments represent only a few implementations of the present invention. While their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A distributed winding, characterized in that: It includes a stator core and a coil assembly. The stator core includes a stator yoke and a plurality of stator tooth portions arranged on the outer periphery of the stator yoke. A stator slot is provided between two adjacent stator tooth portions; the coil assembly includes winding groups, and the winding groups are wound between two adjacent stator tooth portions and form a winding unit with the two adjacent stator tooth portions.

2. The distributed winding according to claim 1, wherein: A stator pole shoe is provided at the end of the stator tooth portion, and one side of the stator pole shoe facing the stator slot is convex.

3. The distributed winding according to claim 1, characterized in that: The winding groups include an A-phase winding, a B-phase winding, and a C-phase winding, and the A-phase winding, B-phase winding, and C-phase winding are all arranged on the stator tooth portions.

4. The distributed winding according to claim 3, wherein: The A-phase winding includes a plurality of A-phase winding branches, the B-phase winding includes a plurality of B-phase winding branches, and the C-phase winding includes a plurality of C-phase winding branches; the A-phase winding branches, B-phase winding branches, and C-phase winding branches are sequentially wound along the radial direction of the stator tooth portion until the position of the stator pole shoe.

5. The distributed winding according to claim 4, characterized in that: A plurality of the A-phase winding branches are connected in parallel with each other to form an A-phase winding.

6. The distributed winding according to claim 4, wherein: A plurality of the B-phase winding branches are connected in parallel with each other to form a B-phase winding.

7. The distributed winding according to claim 4, wherein: A plurality of the C-phase winding branches are connected in parallel with each other to form a C-phase winding.

8. A magnetic field modulation motor, characterized in that: It includes the distributed winding according to any one of claims 1 to 7.

9. The magnetic field modulation motor according to claim 8, wherein: It includes a rotor housing and an array magnet assembly. The rotor housing is arranged outside the stator core, the array magnet assembly faces the coil assembly, the array magnet assembly is composed of a plurality of magnetic pole pairs, each magnetic pole pair is composed of a plurality of magnet bodies, the angle of the magnetization direction of each magnet body is different, and the magnetization angle of the first magnet body of each magnetic pole pair and the adjacent magnetic pole pair forms 360°.

10. The magnetic field modulation motor according to claim 9, characterized in that: A rotor mounting platform is provided on the inner diameter of the rotor housing. A magnet mounting platform and a magnet mounting groove are provided on the rotor mounting platform. The magnet mounting platform and the magnet mounting groove are arranged at intervals on the rotor mounting platform and are continuously arranged on the rotor mounting platform; the magnet body includes a first magnet and a second magnet, the first magnet and the second magnet are arranged at intervals, the first magnet is arranged on the magnet mounting platform, and the second magnet is arranged in the magnet mounting groove; the array magnet assembly is a Halbach array.

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