Research on the multilevel-switching-linear hybrid scheme for PMSM drives

In the applications like aerospace, it is very important to drive the motor with high precision and high efficiency. The traditional switching inverter drives output pulse mode voltage which results in lots of harmonics and influences the stability of motor drives. A multilevel-switching-linear hybrid (MSLH) scheme is proposed in the paper for the permanent magnet synchronous motor (PMSM) drives. It combines the advantages of multilevel switching inverters and power linear amplifiers: the high efficiency and the excellent linear waveform. The topology of MSLH scheme is proposed and the simulation is carried out to verify the performance of this system.