Flat transverse flux permanent magnet synchronous motor with double-rotor structure

Abstract

The invention belongs to the technical field of permanent magnet synchronous motors, and particularly relates to a flat transverse flux permanent magnet synchronous motor with a double-rotor structure. The inner ring rotor is arranged in the outer ring rotor, and the outer ring rotor and the inner ring rotor are coaxially arranged; the stator modules are arranged between the outer ring rotor and the inner ring rotor, the stator modules and the inner ring rotor are coaxially arranged, the stator modules are sequentially arranged at intervals in the axis direction of the inner ring rotor, and the stator modules are arranged to be flat; and the magnetic resistance supporting plate is arranged between two adjacent stator modules, and the magnetic resistance supporting plate and the stator modules are coaxially arranged. According to the motor, the inner ring rotor is coaxially arranged in the outer ring rotor, the stator module is arranged between the inner ring rotor and the outer ring rotor, the magnetic flux path of the motor is shortened by fully utilizing magnetic flux distribution of transverse flow, the power density and the torque density of the motor are further improved, meanwhile, the motor is simple in structure and convenient to machine, and the production cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of permanent magnet synchronous motors, and in particular relates to a flat transverse flux permanent magnet synchronous motor with a dual-rotor structure. Background Art

[0002] In recent years, with the rapid development of science and technology, the demand for high-efficiency motors in the electric vehicle market has continued to rise. At the same time, power generation systems for renewable energy sources such as wind and solar energy also urgently need high-efficiency motors and generators.

[0003] In the existing technology, radial flux motors are heavy and have technical bottlenecks in power density and efficiency. Axial flux motors are less technologically mature and have cooling and thermal management issues to be resolved. They have complex structures and high costs. Single-rotor transverse flux motors have complex structures and high costs, and their design optimization is slow.

[0004] To this end, a flat transverse flux permanent magnet synchronous motor with a dual rotor structure is proposed. Summary of the invention

[0005] The object of the present invention is to provide a flat transverse flux permanent magnet synchronous motor with a dual rotor structure to solve the above problems.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A flat transverse flux permanent magnet synchronous motor with a dual rotor structure, comprising:

[0008] Outer ring rotor;

[0009] An inner ring rotor is arranged inside the outer ring rotor, and the outer ring rotor is coaxially arranged with the inner ring rotor;

[0010] A plurality of stator modules are arranged between the outer ring rotor and the inner ring rotor, the stator modules are coaxially arranged with the inner ring rotor, the plurality of stator modules are sequentially arranged at intervals along the axis direction of the inner ring rotor, and the stator modules are arranged in a flat shape;

[0011] The magnetic resistance support plate is arranged between two adjacent stator modules, and the magnetic resistance support plate is coaxially arranged with the stator module.

[0012] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the outer ring rotor includes:

[0013] Outer ring SMC core;

[0014] A plurality of outer ring S poles are arranged on the outer ring SMC core at equal intervals in the circumferential direction;

[0015] A plurality of outer ring N poles are arranged at equal intervals in the circumferential direction on the outer ring SMC core, and the outer ring N poles are arranged at intervals from the outer ring S poles.

[0016] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the inner ring rotor comprises:

[0017] Inner ring SMC core;

[0018] A plurality of inner ring S poles are arranged on the inner ring SMC core at equal intervals in the circumferential direction;

[0019] A plurality of inner ring N poles are arranged at equal intervals in the circumferential direction on the inner ring SMC core, the inner ring S poles are arranged at intervals from the inner ring N poles, the inner ring N poles are arranged in one-to-one correspondence with the outer ring S poles, and the inner ring S poles are arranged in one-to-one correspondence with the outer ring N poles.

[0020] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the stator module comprises:

[0021] A first stator, coaxially arranged between the outer ring rotor and the inner ring rotor;

[0022] A second stator is coaxially arranged between the outer ring rotor and the inner ring rotor;

[0023] an annular coil winding, arranged between the first stator and the second stator, the annular coil winding being coaxially arranged with the first stator;

[0024] A plurality of guide teeth are arranged at equal intervals in the circumferential direction at the inner edge and the outer edge of the first stator and the second stator.

[0025] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the first mechanical angle between two adjacent stator modules is θ 1 .

[0026] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the first mechanical angle θ 1 The calculation formula is:

[0027]

[0028] Among them, Z∈[2,3,…,n], Z 1 is the number of phases of the motor; N t ∈[2,3,…,n],N t is the number of guide teeth.

[0029] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the second mechanical angle between the first stator and the second stator is θ 2 .

[0030] In the flat transverse flux permanent magnet synchronous motor with a dual rotor structure of the present invention, the second mechanical angle θ 2 The calculation formula is:

[0031]

[0032] Among them, N t ∈[2,3,…,n],N t is the number of guide teeth.

[0033] Compared with the prior art, the present invention has the following advantages and technical effects:

[0034] In the present invention, the inner ring rotor is coaxially arranged in the outer ring rotor, and the stator module is arranged between the inner ring rotor and the outer ring rotor, so as to make full use of the distribution of the magnetic flux flowing transversely to shorten the magnetic flux path of the motor, thereby improving the power density and torque density of the motor. At the same time, the motor of the present invention has a simple structure, is easy to process, and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0036] Figure 1 It is a front view of the present invention;

[0037] Figure 2 It is a structural schematic diagram of the present invention;

[0038] Figure 3 It is a schematic diagram of magnetic lines of force of the stator module in the present invention;

[0039] Among them, 1. outer ring rotor; 2. inner ring rotor; 3. stator module; 4. magnetic resistance support plate; 101. outer ring SMC core; 102. outer ring S pole; 103. outer ring N pole; 201. inner ring SMC core; 202. inner ring S pole; 203. inner ring N pole; 301. first stator; 303. second stator; 302. annular coil winding; 304. guide teeth. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figures 1 to 3 The present invention discloses a flat transverse flux permanent magnet synchronous motor with a dual rotor structure, comprising:

[0043] Outer ring rotor 1;

[0044] The inner ring rotor 2 is arranged inside the outer ring rotor 1, and the outer ring rotor 1 and the inner ring rotor 2 are arranged coaxially;

[0045] A plurality of stator modules 3 are arranged between the outer ring rotor 1 and the inner ring rotor 2. The stator modules 3 are coaxially arranged with the inner ring rotor 2. The plurality of stator modules 3 are sequentially arranged at intervals along the axis direction of the inner ring rotor 2. The stator modules 3 are arranged in a flat shape.

[0046] The magnetic resistance support plate 4 is disposed between two adjacent stator modules 3 , and the magnetic resistance support plate 4 is coaxially disposed with the stator module 3 .

[0047] Among them, the magnetic resistance support plate 4 includes materials such as air barrier / carbon fiber / aluminum alloy, etc., which has no effect on the magnetic flux, but can provide mechanical support and separate the magnetic lines of force between different stator modules 3.

[0048] In one feasible solution, the outer ring rotor 1 includes:

[0049] Outer ring SMC core 101;

[0050] A plurality of outer ring S poles 102 are arranged on the outer ring SMC core 101 at equal intervals in the circumferential direction;

[0051] A plurality of outer ring N poles 103 are arranged at equal intervals in the circumferential direction on the outer ring SMC core 101 , and the outer ring N poles 103 are arranged at intervals from the outer ring S poles 102 .

[0052] In one feasible solution, the inner ring rotor 2 includes:

[0053] Inner ring SMC core 201;

[0054] A plurality of inner ring S poles 202 are arranged on the inner ring SMC core 201 at equal intervals in the circumferential direction;

[0055] Multiple inner ring N poles 203 are arranged at equal intervals in the circumferential direction on the inner ring SMC core 201, the inner ring S poles 202 and the inner ring N poles 203 are arranged at intervals, the inner ring N poles 203 and the outer ring S poles 102 are arranged one by one, and the inner ring S poles 202 and the outer ring N poles 103 are arranged one by one.

[0056] The array modes of the outer ring S pole 102 and the outer ring N pole 103, the inner ring S pole 202 and the inner ring N pole 203 include but are not limited to surface mount, spoke array, and Halbach array. Figure 1-3 The middle one is a spoke array that is magnetized in the circumferential direction;

[0057] In one feasible solution, the stator module 3 includes:

[0058] The first stator 301 is coaxially arranged between the outer ring rotor 1 and the inner ring rotor 2;

[0059] The second stator 303 is coaxially arranged between the outer ring rotor 1 and the inner ring rotor 2;

[0060] The first stator 301 and the second stator 303 can be processed by using mature processing techniques such as silicon steel sheet lamination, casting, wire cutting or ordinary machining, which greatly reduces the production cost.

[0061] The annular coil winding 302 is arranged between the first stator 301 and the second stator 303, and the annular coil winding 302 is coaxially arranged with the first stator 301;

[0062] The stator module 3 includes a first stator 301, a second stator 303 and a ring-shaped coil winding 302, and the first stator 301 and the second stator 303 have the same structure, which is convenient for manufacturing and assembly.

[0063] A plurality of guide teeth 304 are arranged at equal intervals in the circumferential direction at the inner edge and the outer edge of the first stator 301 and the second stator 303 .

[0064] In a feasible solution, the first mechanical angle between two adjacent stator modules 3 is θ 1 .

[0065] In one feasible solution, the first mechanical angle θ 1 The calculation formula is:

[0066]

[0067] Among them, Z∈[2,3,…,n], Z 1 is the number of phases of the motor; N t ∈[2,3,…,n],N t is the number of guide teeth 304 .

[0068] In a specific embodiment, taking a conventional three-phase winding motor as an example, when the number of the guide teeth 304 is 12, the first mechanical angle θ 1 =360 / (3*12)=10°, the number of pole pairs of the motor is 12, and the electrical angle between each stator module 3 is 120°.

[0069] In one feasible solution, the second mechanical angle between the first stator 301 and the second stator 303 is θ 2 .

[0070] In one feasible solution, the second mechanical angle θ 2 The calculation formula is:

[0071]

[0072] Among them, N t ∈[2,3,…,n],N t is the number of guide teeth 304 .

[0073] The present invention makes full use of the lateral flow of magnetic flux distribution to shorten the magnetic flux path of the motor, thereby improving the power density and torque density of the motor;

[0074] The outer ring rotor 1 has the same structure as the inner ring rotor 2, and the number of the outer ring S poles 102 and the inner ring N poles 203 is the same, and the number of the inner ring S poles 202 and the outer ring N poles 103 is the same. By changing the rotation angle between the stator modules 3, the number of phases of the motor can be easily converted.

[0075] Reference Figure 3 , the magnetic lines of force pass through the inner ring rotor 2 from the first stator 301, pass through the second stator 303, and then return to the first stator 301 from the outer ring rotor 1, forming a loop around the annular coil winding 302, and the permanent magnet magnetomotive force and the winding electromotive force interact to realize the operation of the motor. Since the three-phase stators A, B, and C are staggered by 120 electrical degrees, when the rotor is running, phase A first reaches the maximum flux position, then phase B, then phase C, and then phase A, and this reciprocating cycle drives the rotor to rotate. The three-phase stators A, B, and C are three stator modules 3 arranged in sequence, not shown in the figure.

[0076] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure, characterized in that: include: Outer ring rotor (1); An inner ring rotor (2) is arranged inside the outer ring rotor (1), and the outer ring rotor (1) and the inner ring rotor (2) are arranged coaxially; A plurality of stator modules (3) are arranged between the outer ring rotor (1) and the inner ring rotor (2); the stator modules (3) and the inner ring rotor (2) are arranged coaxially; the plurality of stator modules (3) are arranged in sequence at intervals along the axial direction of the inner ring rotor (2); and the stator modules (3) are arranged in a flat shape; The magnetic resistance support plate (4) is arranged between two adjacent stator modules (3), and the magnetic resistance support plate (4) is coaxially arranged with the stator module (3).

2. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 1, characterized in that: The outer ring rotor (1) comprises: Outer ring SMC core (101); A plurality of outer ring S poles (102) are arranged at equal intervals in the circumferential direction on the outer ring SMC core (101); A plurality of outer ring N poles (103) are arranged at equal intervals in the circumferential direction on the outer ring SMC core (101), and the outer ring N poles (103) are arranged at intervals from the outer ring S poles (102).

3. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 2, characterized in that: The inner ring rotor (2) comprises: Inner ring SMC core (201); A plurality of inner ring S poles (202) are arranged at equal intervals in the circumferential direction on the inner ring SMC core (201); A plurality of inner ring N poles (203) are arranged at equal intervals in the circumferential direction on the inner ring SMC core (201); the inner ring S pole (202) and the inner ring N pole (203) are arranged at intervals; the inner ring N pole (203) and the outer ring S pole (102) are arranged in a one-to-one correspondence; and the inner ring S pole (202) and the outer ring N pole (103) are arranged in a one-to-one correspondence.

4. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 1, characterized in that: The stator module (3) comprises: A first stator (301) is coaxially arranged between the outer ring rotor (1) and the inner ring rotor (2); A second stator (303) is coaxially arranged between the outer ring rotor (1) and the inner ring rotor (2); An annular coil winding (302) is arranged between the first stator (301) and the second stator (303), and the annular coil winding (302) is coaxially arranged with the first stator (301); A plurality of guide teeth (304) are arranged at equal intervals in the circumferential direction at the inner edge and the outer edge of the first stator (301) and the second stator (303).

5. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 4, characterized in that: The first mechanical angle between two adjacent stator modules (3) is θ1.

6. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 5, characterized in that: The calculation formula of the first mechanical angle θ1 is: Among them, Z∈[2,3,…,n], Z1 is the number of phases of the motor; N t ∈[2,3,…,n],N t is the number of guide teeth (304).

7. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 4, characterized in that: A second mechanical angle between the first stator (301) and the second stator (303) is θ2.

8. A flat transverse flux permanent magnet synchronous motor with a dual rotor structure according to claim 7, characterized in that: The calculation formula of the second mechanical angle θ2 is: Among them, N t ∈[2,3,…,n],N t is the number of guide teeth (304).

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