Open Winding-Permanent Magnet/Magnet Reluctance Hybrid Rotor Double Stator Synchronous Motor SVPWM Control

Abstract

Coal mine conveyor belt and other low-speed large torque system, the torque density and torque stability of the motor requirements are higher, permanent magnet / magnet reluctance hybrid rotor double stator synchronous motor (PM/MRHRDSSM) is just adapted to this requirement, however, the traditional close winding single inverter vector control system control PM/MRHRDSSM provides large torque ripple, high speed fluctuation and large total harmonic distortion (THD) of the current, difficult to be used in actual production and life, this paper proposes a large torque open winding-permanent magnet / magnet reluctance hybrid rotor double stator synchronous motor(OW-PM/MRHRDSSM) based on SVPWM dual inverter control strategy, and analysis of open winding double inverter structure, and its voltage vector mathematical model, using the existing two-level inverter as a basis, the bilateral inverter separately discussed its role and control method, as well as the decomposition method of synthetic voltage vector and the inverter device in the small sector on-time, the end of this paper through simulation to compare the traditional close winding single inverter vector control system control PM/MRHRDSSM and the large torque OW-PM/MRHRDSSM based on SVPWM dual inverter control strategy to prove the effectiveness of the proposed method in reducing torque ripple, speed fluctuation and THD of current during motor operation.