Permanent magnet vernier motor with non-uniform tooth topology and its magnetic field modulation method
A topology, vernier motor technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuit shape/pattern/structure, estimation/correction of motor parameters, etc. Potential harmonics, permanent magnet vernier motor output torque and torque density improvement
Active Publication Date: 2020-10-23
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0003] One of the purposes of the present invention is to provide a permanent magnet vernier motor with non-uniform tooth topology, to solve the problem that the permanent magnet vernier motor in the prior art is difficult to fully utilize the harmonics of the winding magnetomotive force and limit the output torque of the permanent magnet vernier motor and the problem of torque density improvement
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[0073] Preferably, as a specific implementation of the magnetic field modulation method of the non-uniform tooth topology permanent magnet vernier motor provided by the present invention, the order of the winding magnetomotive force harmonic that is not utilized by the no-load air gap flux density harmonic will be selected denoted as Z c , denote the permeance order of the target permeance harmonic as Z fn , then Z fn = Z r -Z c , and the tooth unit 12 number Z f Satisfy the relation Z f =GCD(Z fn ,Z s ) or Z f = Z s -Z fn ; where GCD is the greatest common divisor.
[0074] In this step, a permanent magnet vernier motor with symmetrical three-phase armature windings with 2p winding magnetomotive force harmonics is taken as an example. Since Z s is a multiple of 3p, so Z s -3p is also a multiple of 3p, the number of 12 tooth units determined by the greatest common divisor Z f The condition of armature winding symmetry must be satisfied.
[0075] Specifically, the...
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The invention provides a non-uniform tooth topology permanent magnet vernier motor and a magnetic field modulation method thereof. According to the non-uniform tooth topology permanent magnet verniermotor, a plurality of tooth units are arranged at interval on a stator ring. The spacing between the two adjacent stator teeth in each tooth unit is not equal to the groove spacing of the tooth unit groove formed between the two adjacent tooth units, and a plurality of stator teeth in each tooth unit are symmetrical with respect to the center face of the tooth unit so that a non-uniformly distributed tooth structure is formed on that stator ring. The target magnetic conductance harmonic with a frequency corresponding to the winding magnetomotive force harmonic which is not utilized by the no-load air gap magnetic density harmonic is introduced, the no-load air gap magnetic density harmonic is modulated through the non-uniformly distributed tooth structure and the permanent magnets and theno-load air gap magnetic density harmonic is corresponding to the target magnetic conductance harmonics so that the no-load air gap magnetic density harmonics corresponding to the target magnetic conductance harmonics are modulated through the non-uniform distributed tooth structure and the permanent magnets and the magnetic motive force harmonics generated by the armature winding are fully utilized to increase the output torque and the torque density of the permanent magnet vernier motor.
Description
technical field [0001] The invention belongs to the technical field of permanent magnet motor and permanent magnet motor design, and more specifically relates to a permanent magnet vernier motor with non-uniform tooth topology and a magnetic field modulation method thereof. Background technique [0002] As a low-speed and high-torque direct-drive motor, Vernier Machine has broad application prospects in new energy fields such as electric vehicles, wind power generation, and wave power generation. The vernier motor is a kind of permanent magnet motor with unequal number of stator and rotor poles. It mainly includes stator, rotor and magnetic field modulation part. The current open-slot permanent magnet vernier motor usually has a plurality of stator slots accommodating the armature winding evenly along the circumference of the stator, and the protruding parts between the stator slots form stator teeth. Magnetic modulation (magnetic field modulation) is carried out, so that t...
Claims
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IPC IPC(8): H02K21/24H02K1/14H02K3/18H02P23/14
CPCH02K1/146H02K3/18H02K21/24H02K2201/06H02P23/14
Inventor赵飞陶恩成李立毅潘学伟
OwnerHARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL