A flat, dual-rotor transverse flux permanent magnet synchronous motor

Abstract

This invention belongs to the field of permanent magnet synchronous motor technology, and particularly relates to a flat, dual-rotor, transverse flux permanent magnet synchronous motor, comprising: an outer rotor; an inner rotor disposed within the outer rotor, coaxially arranged with the outer rotor; multiple stator modules disposed between the outer and inner rotors, coaxially arranged with the inner rotors, the stator modules being arranged sequentially at intervals along the axial direction of the inner rotor, and the stator modules being flat; and a magnetic resisting support plate disposed between two adjacent stator modules, coaxially arranged with the stator modules. In this invention, the inner rotor is coaxially disposed within the outer rotor, and the stator modules are disposed between the inner and outer rotors, fully utilizing the transversely flowing magnetic flux distribution to shorten the magnetic flux path of the motor, thereby improving the power density and torque density of the motor. Simultaneously, the motor structure of this invention is simple, easy to manufacture, and reduces production costs.

Description

Technical Field

[0001] This invention belongs to the field of permanent magnet synchronous motor technology, and particularly relates to a flat, transverse flux permanent magnet synchronous motor with a dual-rotor structure. Background Technology

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

[0003] In the existing technology, radial flux motors are heavy, and power density and efficiency have reached technical bottlenecks. Axial flux motors have low technological maturity, and cooling and thermal management issues need to be solved. They are also complex in structure and expensive. Single-rotor transverse flux motors are also complex in structure, expensive, and slow in design optimization.

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

[0005] The purpose of this invention is to provide a flat, transverse flux permanent magnet synchronous motor with a dual-rotor structure to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following solution:

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

[0008] Outer rotor;

[0009] An inner ring rotor is disposed inside the outer ring rotor, and the outer ring rotor and the inner ring rotor are coaxially arranged.

[0010] Multiple stator modules are disposed between the outer ring rotor and the inner ring rotor. The stator modules are coaxially disposed with the inner ring rotor. The multiple stator modules are arranged sequentially at intervals along the axial direction of the inner ring rotor. The stator modules are configured to be flat.

[0011] A magnetic resistive support plate is disposed between two adjacent stator modules, and the magnetic resistive support plate is coaxially disposed with the stator module.

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

[0013] Outer ring SMC iron core;

[0014] Multiple outer ring S poles are circumferentially and equally spaced on the outer ring SMC core;

[0015] Multiple outer ring N poles are circumferentially and equally spaced on the outer ring SMC core, with the outer ring N poles and the outer ring S poles spaced apart.

[0016] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the inner rotor includes:

[0017] Inner ring SMC iron core;

[0018] Multiple inner ring S poles are circumferentially spaced on the inner ring SMC core;

[0019] Multiple inner ring N poles are circumferentially spaced on the inner ring SMC core. The inner ring S poles are spaced apart from the inner ring N poles. The inner ring N poles correspond one-to-one with the outer ring S poles.

[0020] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the stator module includes:

[0021] The first stator is coaxially disposed between the outer ring rotor and the inner ring rotor;

[0022] The second stator is coaxially disposed between the outer ring rotor and the inner ring rotor;

[0023] A ring-shaped coil winding is disposed between the first stator and the second stator, and the ring-shaped coil winding is coaxially disposed with the first stator;

[0024] Multiple guide teeth are circumferentially spaced at equal intervals on the inner and outer edges of the first and second stators.

[0025] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the first mechanical angle between two adjacent stator modules is θ1.

[0026] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the formula for calculating the first mechanical angle θ1 is:

[0027] ;

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

[0029] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the second mechanical angle between the first stator and the second stator is θ2.

[0030] In the flat, dual-rotor transverse flux permanent magnet synchronous motor of the present invention, the formula for calculating the second mechanical angle θ2 is:

[0031] ;

[0032] Where, N t ∈[2,3,…,n],N t The number of guide teeth.

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

[0034] In this invention, the inner rotor is coaxially arranged inside the outer rotor, and the stator module is arranged between the inner rotor and the outer rotor. The magnetic flux distribution of the transverse flow is fully utilized 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 structure of this invention is simple, easy to process, and reduces production costs. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0037] Figure 2 This is a schematic diagram of the structure of the present invention;

[0038] Figure 3 This is a schematic diagram of the magnetic field lines of the stator module in this 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 tooth. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Reference Figures 1 to 3 This invention discloses a flat, dual-rotor transverse flux permanent magnet synchronous motor, comprising:

[0043] Outer rotor 1;

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

[0045] Multiple stator modules 3 are disposed between the outer ring rotor 1 and the inner ring rotor 2. The stator modules 3 are coaxially disposed with the inner ring rotor 2. The multiple stator modules 3 are arranged sequentially at intervals along the axial direction of the inner ring rotor 2. The stator modules 3 are configured to be flat.

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

[0047] Among them, the magnetic blocking support plate 4 is made of materials such as air barrier / carbon fiber / aluminum alloy, 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 embodiment, the outer rotor 1 includes:

[0049] Outer ring SMC iron core 101;

[0050] Multiple outer ring S poles 102 are circumferentially and equally spaced on the outer ring SMC iron core 101;

[0051] Multiple outer ring N poles 103 are circumferentially spaced on the outer ring SMC core 101, and the outer ring N poles 103 and outer ring S poles 102 are spaced apart.

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

[0053] Inner ring SMC iron core 201;

[0054] Multiple inner ring S poles 202 are circumferentially and equally spaced on the inner ring SMC core 201;

[0055] Multiple inner ring N poles 203 are circumferentially spaced on the inner ring SMC core 201. Inner ring S poles 202 and inner ring N poles 203 are spaced apart. Inner ring N poles 203 and outer ring S poles 102 are arranged in a one-to-one correspondence.

[0056] The array configurations of the outer ring S-pole 102 and the outer ring N-pole 103, and 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 element is a spoke array that is magnetized in the circumferential direction;

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

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

[0059] The second stator 303 is coaxially disposed 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 using mature processing techniques such as silicon steel sheet lamination, casting, wire cutting, or ordinary machining, which greatly reduces production costs.

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

[0062] The stator module 3 includes a first stator 301, a second stator 303, and a toroidal coil winding 302. The first stator 301 and the second stator 303 have the same structure, which facilitates manufacturing and assembly.

[0063] Multiple guide teeth 304 are circumferentially and equally spaced at the inner and outer edges of the first stator 301 and the second stator 303.

[0064] In one feasible scheme, the first mechanical angle between two adjacent stator modules 3 is θ1.

[0065] In one feasible solution, the formula for calculating the first mechanical angle θ1 is:

[0066] ;

[0067] Where Z∈[2,3,…,n], Z is the number of phases of the motor; N t ∈[2,3,…,n],N t This refers to the number of guide teeth 304.

[0068] In a specific embodiment, taking a traditional three-phase winding motor as an example, when the number of guide teeth 304 is 12, the first mechanical angle θ1 = 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 embodiment, the second mechanical angle between the first stator 301 and the second stator 303 is θ2.

[0070] In one feasible solution, the formula for calculating the second mechanical angle θ2 is:

[0071] ;

[0072] Where, N t ∈[2,3,…,n],N t This refers to the number of guide teeth 304.

[0073] In this invention, the magnetic flux distribution of lateral flow is fully utilized to shorten the magnetic flux path of the motor, thereby improving the power density and torque density of the motor.

[0074] The outer rotor 1 and the inner rotor 2 have the same structure, and the number of outer S poles 102 and inner N poles 203 is the same. The number of inner S poles 202 and outer 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 changed.

[0075] Reference Figure 3 Magnetic lines of force pass from the first stator 301 through the inner rotor 2, through the second stator 303, and then back to the first stator 301 from the outer rotor 1, forming a loop around the annular coil winding 302. The permanent magnet magnetomotive force and the winding electromotive force interact to drive the motor. Since the three-phase stators A, B, and C are staggered by 120 electrical degrees, when the rotor is running, phase A reaches its maximum magnetic flux position first, then phase B, then phase C, and then phase A again, repeating this cycle to drive 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 this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0077] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined 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 rotor (1); The inner ring rotor (2) is disposed inside the outer ring rotor (1), and the outer ring rotor (1) and the inner ring rotor (2) are coaxially disposed. Multiple stator modules (3) are disposed between the outer ring rotor (1) and the inner ring rotor (2). The stator modules (3) are coaxially disposed with the inner ring rotor (2). The multiple stator modules (3) are arranged sequentially at intervals along the axial direction of the inner ring rotor (2). The stator modules (3) are configured to be flat. A magnetic resistive support plate (4) is disposed between two adjacent stator modules (3), and the magnetic resistive support plate (4) is coaxially disposed with the stator module (3); The outer rotor (1) includes: Outer ring SMC core (101); Multiple outer ring S poles (102) are circumferentially and equally spaced on the outer ring SMC core (101); Multiple outer ring N poles (103) are circumferentially and equally spaced on the outer ring SMC core (101), and the outer ring N poles (103) and the outer ring S poles (102) are spaced apart; The inner ring rotor (2) includes: Inner ring SMC core (201); Multiple inner ring S poles (202) are circumferentially and equally spaced on the inner ring SMC core (201); Multiple inner ring N poles (203) are circumferentially spaced on the inner ring SMC core (201). The inner ring S poles (202) and the inner ring N poles (203) are spaced apart. The inner ring N poles (203) and the outer ring S poles (102) are arranged in a one-to-one correspondence. The stator module (3) includes: The first stator (301) is coaxially disposed between the outer ring rotor (1) and the inner ring rotor (2); The second stator (303) is coaxially disposed between the outer ring rotor (1) and the inner ring rotor (2); A ring coil winding (302) is disposed between the first stator (301) and the second stator (303), and the ring coil winding (302) is coaxially disposed with the first stator (301); Multiple guide teeth (304) are circumferentially and equally spaced at the inner and outer edges of the first stator (301) and the second stator (303).

2. The flat, dual-rotor transverse flux permanent magnet synchronous motor according to claim 1, characterized in that, The first mechanical angle between two adjacent stator modules (3) is θ1.

3. A flat, dual-rotor transverse flux permanent magnet synchronous motor according to claim 2, characterized in that, The formula for calculating the first mechanical angle θ1 is: ； Where Z∈[2,3,…,n], Z is the number of phases of the motor; N t ∈[2,3,…,n],N t The number of guide teeth (304).

4. A flat, dual-rotor transverse flux permanent magnet synchronous motor according to claim 1, characterized in that, The second mechanical angle between the first stator (301) and the second stator (303) is θ2.

5. A flat, transverse flux permanent magnet synchronous motor with a dual-rotor structure according to claim 4, characterized in that, The formula for calculating the second mechanical angle θ2 is: ； Where, N t ∈[2,3,…,n],N t The number of guide teeth (304).

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