Consequent pole vernier permanent magnet motor based on harmonic modification rotor and stator with magnetic barrier

By designing a harmonic-modified rotor and a stator with magnetic barriers, the magnetic permeability distribution is optimized, non-working harmonics are suppressed, and inter-pole leakage flux is reduced. This solves the problems of high cost and low torque density in alternating pole vernier permanent magnet motors, achieving efficient torque enhancement and cost reduction.

CN122419031AActive Publication Date: 2026-07-17QINGDAO UNIV
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Patent Information

Application Number
CN202610878214.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-17
Publication Date
2026-07-17
Estimated Expiration
2046-06-17

AI Technical Summary

Technical Problem

While existing alternating pole vernier permanent magnet motors improve torque density, they suffer from problems such as high permanent magnet usage and high cost. Furthermore, the simple application of Halbach permanent magnet arrays fails to effectively utilize non-working harmonics in the air gap, resulting in low torque density.

Method used

The design employs a harmonic-shaped rotor and a stator with magnetic barriers. The rotor core poles adopt a harmonic-shaped orientation design, and the stator teeth are inter-tooth embedded with magnetic barriers. By optimizing the magnetic permeability distribution and blocking non-working harmonic paths, combined with ordinary radial magnetization, the complex Halbach array is avoided.

Benefits of technology

While maintaining high torque density, the cost of the motor has been reduced, torque quality and power factor have been improved, and full utilization of permanent magnets and effective suppression of non-operating harmonics have been achieved.

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Abstract

The invention belongs to the technical field of motor design, and particularly relates to a consequent-pole vernier permanent magnet motor based on a harmonic modification rotor and a stator with a magnetic barrier. The motor specifically comprises a rotor and a stator, the rotor is coaxially arranged in the stator, a rotor iron core pole adopts a harmonic modification directional design, non-working harmonic waves are suppressed by optimizing air gap magnetic conductance distribution, meanwhile, inter-pole magnetic leakage is reduced, and the permanent magnet flux density fundamental wave amplitude is improved; and the magnetic barriers are embedded into the stator teeth and are used for blocking low-order non-working harmonic paths in the armature flux density, so that the amplitude of the armature flux density is weakened. The invention solves the problems that the current consequent-pole vernier permanent magnet motor is low in torque density and high in manufacturing cost due to the fact that a Halbach permanent magnet array is simply applied to the existing motor, only work harmonic wave enhancement is realized, non-work harmonic waves existing in an air gap are neglected, and the permanent magnet is not fully utilized.
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