Transverse magnetic circuit module complementary magnetic flux reverse motor

Abstract

The invention relates to a transverse magnetic circuit module complementary magnetic flux reverse motor, comprising: a stator assembly comprising a plurality of U-shaped stator cores arranged circumferentially, a front module permanent magnet, a rear module permanent magnet, a front module armature winding and a rear module armature winding; and the rotor assembly comprises a front rotor module and a rear rotor module which are axially distributed and have the same structure, rotor salient pole teeth are respectively arranged on the inner side surfaces of the front rotor module and the rear rotor module along the circumferential direction, and the rotor salient pole teeth on the front rotor module and the rotor salient pole teeth on the rear rotor module are arranged in a staggered manner along the circumferential angle. The electromagnetic torque density is remarkably improved through magnetic circuit topology optimization, more excellent power output characteristics are achieved, meanwhile, armature winding turn chain magnetic flux directions of the front module and the rear module are opposite, the phase difference is 180 deg electrical angle, magnetic linkages of the two modules are complementary, even harmonics of the magnetic linkages are counteracted after synthesis, in addition, the unique stator structure improves the air gap magnetic density of the motor, and the motor efficiency is improved. And the motor power density is improved, and the application and popularization value is extremely high.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and particularly to a flux-reversal motor with complementary transverse magnetic circuit modules. Background Art

[0002] In the context of the rapid development of the global economy and the continuous growth of the population, the shortage of traditional energy and the deterioration of the ecological environment have become major challenges faced by the development of human society. As an energy-saving and environment-friendly means of transportation, the rapid development of electric vehicles provides a feasible path to solve this problem.

[0003] To meet the requirements of the electric vehicle power system, the drive motor needs to have characteristics such as high reliability, excellent heat dissipation performance, and high-speed operation adaptability. In the current mainstream technical solutions: Although permanent magnet motors have advantages such as high efficiency, high power factor, low temperature rise, and compact structure, they have the risks of irreversible demagnetization and the technical bottleneck of field-weakening control; The flux-reversal permanent magnet motor integrates the permanent magnet and the armature winding on the stator side, significantly improving the heat dissipation performance. Its simplified rotor structure (composed of pure silicon steel sheets) is particularly suitable for the drive system of new energy vehicles, but it faces technical problems such as low torque density and large torque ripple; The transverse flux permanent magnet motor performs outstandingly in terms of low-speed performance and torque density, but its application range is limited due to defects such as excessive cogging torque, insufficient utilization rate of permanent magnets, high leakage magnetic rate, and complex production processes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a flux-reversal motor with complementary transverse magnetic circuit modules.

[0005] The present invention is realized by the following technical solutions:

[0006] A flux-reversal motor with complementary transverse magnetic circuit modules, comprising:

[0007] A stator assembly, including a plurality of U-shaped stator cores arranged circumferentially, a front-module permanent magnet, a rear-module permanent magnet, a front-module armature winding, and a rear-module armature winding. Each of the stator cores encloses an annular structure. Each U-shaped stator core includes 2 stator salient poles. The front-module permanent magnet and the rear-module permanent magnet are respectively located at the ends of the two stator salient poles. The front-module armature winding and the rear-module armature winding are respectively wound outside the two stator salient poles;

[0008] A rotor assembly, coaxially arranged outside the stator assembly and having an air gap with the stator assembly, including two sets of front rotor modules and rear rotor modules that are axially distributed and have the same structure. The inner sides of the front rotor modules and the rear rotor modules are respectively arranged with rotor salient poles along the circumferential direction. The rotor salient poles on the front rotor modules and the rotor salient poles on the rear rotor modules are arranged with a circumferential angle offset.

[0009] According to the above technical solution, preferably, two front module permanent magnets and two rear module permanent magnets with opposite magnetization directions are respectively attached to the two stator salient pole teeth of each U-shaped stator core. The two front module permanent magnets or the two rear module permanent magnets located on each stator salient pole tooth have the same structure, and the front module permanent magnets and the rear module permanent magnets at the same position on the two stator salient pole teeth of the U-shaped stator core have the same magnetization direction.

[0010] According to the above technical solution, preferably, the front module permanent magnet and the rear module permanent magnet are radially magnetized permanent magnets made of neodymium iron boron, ferrite or samarium cobalt materials.

[0011] According to the above technical solution, preferably, by designing the circumferential dislocation of the rotor salient pole teeth of the front rotor module and the rear rotor module and the opposite winding directions of the front module armature winding and the rear module armature winding, the even harmonics of the synthesized magnetic flux linkage are cancelled.

[0012] According to the above technical solution, preferably, Nr rotor salient pole teeth are respectively arranged along the circumferential direction in the front rotor module and the rear rotor module, and the rotor salient pole teeth on the front rotor module are offset by π / Nr degrees along the circumferential direction from the rotor salient pole teeth on the rear rotor module.

[0013] According to the above technical solution, preferably, the magnetic flux linkage directions of the front module armature winding and the rear module armature winding are opposite, and the phase difference is 180° electrical angle.

[0014] According to the above technical solution, preferably, the U-shaped stator core and the rotor assembly are made of silicon steel sheet materials.

[0015] The beneficial effects of the present invention are as follows:

[0016] The present invention provides a flux-reversal motor with complementary transverse magnetic circuit modules, which realizes a number of breakthrough innovations in terms of technical performance and structural design. First, through the optimization of the magnetic circuit topology, the electromagnetic torque density is significantly improved, and it has better power output characteristics compared with traditional permanent magnet motors. Second, the armature windings and permanent magnets are both located on the stator. The rotor core has neither permanent magnets nor windings and is only made of magnetic conductive material silicon steel sheet, with a simple and reliable structure, reduced manufacturing cost, high mechanical strength, and is suitable for high-speed operation. At the same time, the magnetic flux linkage directions of the front and rear module armature windings are opposite, and the phase difference is 180° electrical angle. The magnetic flux linkages of the two modules are complementary, and the even harmonics of the synthesized magnetic flux linkage are cancelled. In addition, the unique stator structure improves the air-gap magnetic flux density of the motor, improves the power density of the motor, and has extremely high application and promotion value. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention Figure 1 。

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the U-shaped stator core of the present invention.

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the armature windings of the front module and the rear module of the present invention.

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the permanent magnets of the front module and the rear module of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the rotor assembly of the present invention.

[0022] Figure 6 It is a schematic diagram of the transverse magnetic circuit of the U-shaped stator core of the present invention.

[0023] Figure 7 It is a schematic of the three-dimensional structure of the present invention Figure 2 .

[0024] In the figure: 1. Rotor assembly; 2. Front rotor salient pole teeth; 3. Rear rotor salient pole teeth; 4. Stator assembly; 5. U-shaped stator core; 6. Front module permanent magnet; 7. Rear module permanent magnet; 8. Front module armature winding; 9. Rear module armature winding. Detailed implementation manners

[0025] In order to enable those skilled in the art of the present technology to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the invention without creative efforts shall fall within the scope of protection of the invention.

[0026] In the description of the invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] AsFigures 1-7 As shown in the figure, the present invention includes a stator assembly 4 and a rotor assembly 1 coaxially disposed outside the stator assembly 4. There is an air gap between the rotor assembly 1 and the stator assembly 4. The stator assembly 4 includes a plurality of U-shaped stator cores 5 arranged circumferentially, a front module permanent magnet 6, a rear module permanent magnet 7, a front module armature winding 8, and a rear module armature winding 9. Each of the stator cores encloses an annular structure. Each U-shaped stator core 5 includes two stator salient poles. The front module permanent magnet 6 and the rear module permanent magnet 7 are respectively located at the ends of the two stator salient poles. The front module armature winding 8 and the rear module armature winding 9 are respectively wound outside the two stator salient poles.

[0029] Among them, the front module permanent magnet 6 and the rear module permanent magnet 7 are radially magnetized permanent magnets made of neodymium iron boron, ferrite or samarium cobalt materials. Two front module permanent magnets 6 and rear module permanent magnets 7 with opposite magnetization directions are respectively attached to the two stator salient poles of each U-shaped stator core 5. The two front module permanent magnets 6 or rear module permanent magnets 7 located on each stator salient pole have the same structure. The axial lengths of the front module permanent magnet 6 and the rear module permanent magnet 7 are equal to the axial length of the stator salient pole of the U-shaped stator core 5. And the front module permanent magnet 6 and the rear module permanent magnet 7 at the same position on the two stator salient poles of the U-shaped stator core 5 have the same magnetization direction.

[0030] As Figure 6 shown, two permanent magnets with opposite magnetization directions are surface-mounted on each stator salient pole of the U-shaped stator core 5 along the circumferential direction. When the rotor salient pole enters the left permanent magnet region, a positive magnetic flux path is generated. When the rotor salient pole enters the right permanent magnet region, a reverse magnetic flux path is generated. Thus, an alternating polarity magnetic flux is formed to achieve magnetic flux reversal.

[0031] The rotor assembly 1 includes two sets of front rotor modules and rear rotor modules axially distributed and having the same structure. The inner sides of the front rotor module and the rear rotor module are respectively arranged with rotor salient poles (front rotor salient poles 2 and rear rotor salient poles 3) along the circumferential direction. The rotor salient poles (front rotor salient poles 2) on the front rotor module and the rotor salient poles (rear rotor salient poles 3) on the rear rotor module are arranged with a circumferential angle offset. Among them, the U-shaped stator core 5 and the rotor assembly 1 are preferably made of silicon steel sheet materials. Through the circumferential offset of the rotor salient poles of the front rotor module and the rear rotor module and the design of opposite winding directions of the front module armature winding 8 and the rear module armature winding 9, the even harmonics of the synthesized magnetic chain are cancelled.

[0032] Specifically, Nr rotor salient poles are respectively arranged circumferentially in the front rotor module and the rear rotor module. The rotor salient poles on the front rotor module are circumferentially offset by π / Nr degrees from the rotor salient poles on the rear rotor module. This setting constructs a complete closed-loop magnetic circuit through an accurate circumferential angle misalignment layout. In addition, the front rotor salient pole 2, the corresponding front-module permanent magnet 6, the U-shaped stator core 5, the corresponding rear-module permanent magnet 7, and the rear rotor salient pole 3 form a transverse magnetic circuit. The magnetic fluxes linked by the front-module armature winding 8 and the rear-module armature winding 9 are in opposite directions, and the phase difference is 180° electrical angle. The magnetic fluxes of the two modules are complementary, and the even harmonics of the synthesized magnetic flux are cancelled out.

[0033] In summary, the present application provides a flux-reversal motor with complementary transverse magnetic circuits. The flux-reversal motor with complementary transverse magnetic circuits generates a changing magnetic field in the front-module armature winding and the rear-module armature winding by rotation, thereby inducing a changing electromotive force to realize the operation of the motor. A number of breakthrough innovations have been achieved in terms of technical performance and structural design:

[0034] First, through magnetic circuit topology optimization, a radial-transverse composite magnetic flux path is constructed based on the U-shaped stator core. The motor movement direction is perpendicular to the plane where the magnetic force lines are closed, realizing the decoupling of electric load and magnetic load, avoiding the mutual competition of the tooth-slot cross-sections of traditional motors, significantly improving the electromagnetic torque density, and having more excellent power output characteristics compared with traditional motors.

[0035] Second, both the armature winding and the permanent magnet are located on the stator. The rotor core has neither permanent magnet nor winding and is only made of magnetic conductive material silicon steel sheet. The structure is simple and reliable, the manufacturing cost is reduced, it has high mechanical strength, and is suitable for high-speed operation.

[0036] At the same time, through the circumferential misalignment of the salient poles of the front and rear rotor modules (mechanical misalignment of π / Nr degrees) and the opposite winding directions design, the magnetic fluxes linked by the armature windings of the front and rear modules are in opposite directions, and the even harmonics of the two modules have a phase difference of 180° electrical angle. The even harmonics are cancelled out during synthesis.

[0037] In addition, with the unique stator mechanism, through the transverse magnetic circuit design (the U-shaped stator core makes the magnetic force lines close transversely, reducing magnetic leakage) combined with the double permanent magnet superposition magnetomotive force, the air-gap magnetic density of the motor is increased, the power density of the motor is improved, and it has extremely high application and promotion value.

[0038] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A flux-reversal machine with complementary transverse magnetic circuits, characterized in that include: The stator assembly (4) includes a plurality of U-shaped stator cores (5) arranged circumferentially, a front module permanent magnet (6), a rear module permanent magnet (7), a front module armature winding (8), and a rear module armature winding (9). Each of the stator cores forms an annular structure, each of the U-shaped stator cores (5) includes two stator salient pole teeth, the front module permanent magnet (6) and the rear module permanent magnet (7) are respectively located at the ends of the two stator salient pole teeth, and the front module armature winding (8) and the rear module armature winding (9) are respectively wound outside the two stator salient pole teeth; The rotor assembly (1) is coaxially arranged outside the stator assembly (4) and has an air gap between the stator assembly (4), and includes two groups of front rotor modules and rear rotor modules that are axially distributed and have the same structure. The inner sides of the front rotor module and the rear rotor module are respectively arranged with rotor salient pole teeth along the circumferential direction, and the rotor salient pole teeth on the front rotor module and the rotor salient pole teeth on the rear rotor module are arranged in a staggered manner along the circumferential angle.

2. The flux-reversal machine with complementary transverse magnetic circuits module according to claim 1, characterized in that, Two stator salient pole teeth of each U-shaped stator core (5) are respectively attached with two front module permanent magnets (6) and two rear module permanent magnets (7) with opposite magnetization directions. The two front module permanent magnets (6) or rear module permanent magnets (7) located on each of the stator salient pole teeth have the same structure, and the front module permanent magnets (6) and rear module permanent magnets (7) at the same position on the two stator salient pole teeth of the U-shaped stator core (5) have the same magnetization direction.

3. The flux-reversal machine with complementary transverse magnetic circuit modules according to claim 2, wherein The front module permanent magnet (6) and the rear module permanent magnet (7) are radially magnetized permanent magnets made of neodymium iron boron, ferrite or samarium cobalt materials.

4. The transverse magnetic circuit module complementary flux reversal motor according to claim 1, characterized in that, By circumferentially staggering the rotor salient pole teeth of the front rotor module and the rear rotor module and designing the front module armature winding (8) and the rear module armature winding (9) to be wound in opposite directions, the synthesized rear magnetic flux even harmonics are canceled out.

5. The flux-reversal machine with complementary transverse magnetic circuit modules according to claim 4, characterized in that, Nr rotor salient pole teeth are respectively arranged in the front rotor module and the rear rotor module along the circumferential direction, and the rotor salient pole teeth located on the front rotor module and the rotor salient pole teeth located on the rear rotor module are staggered by π / Nr degrees along the circumferential direction.

6. The flux-reversal machine with complementary transverse magnetic circuit modules according to claim 4, characterized in that, The turns of the front module armature winding (8) and the rear module armature winding (9) have opposite directions of magnetic flux, and the phase difference is 180 degrees electrical angle.

7. The flux-reversal machine with complementary lateral magnetic circuits according to any one of claims 1-6, characterized in that The U-shaped stator core (5) and the rotor assembly (1) are made of silicon steel sheet material.

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