Harmonic design cooperative bilateral permanent magnet Vernier motor and torque density improvement method thereof

Abstract

The application discloses a harmonic design cooperative double-sided permanent magnet vernier motor and a torque density improving method thereof, wherein a rotor is coaxially sleeved outside a stator, a trapezoidal rotor permanent magnet is embedded in the middle of each rotor slot and is magnetized radially inward, each rotor permanent magnet is tightly connected by an outer rotor trapezoidal permanent magnet and an inner rotor linear permanent magnet, the surface of the rotor salient pole tooth and the inner side surface of the rotor linear permanent magnet are designed into harmonic injection curves according to a harmonic injection function, the inner side surface of the stator tooth is embedded with a stator trapezoidal main permanent magnet in the middle, two auxiliary trapezoidal permanent magnets which are the same in structure and position and are symmetrically arranged are arranged on the tangent sides of the trapezoidal main permanent magnet, the cross-sectional areas of the two auxiliary trapezoidal permanent magnets are equal, and the sum of the cross-sectional areas of the two auxiliary trapezoidal permanent magnets is equal to the cross-sectional area of the stator trapezoidal main permanent magnet, the three stator trapezoidal permanent magnets are all wide outside and narrow inside, are magnetized radially inward and have equal radial heights, and the torque ripple is reduced while the motor output torque is improved.

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