Review of Speed Controlling Techniques on Dual PMSM Drive Systems

Permanent Magnet Synchronous Motors (PMSMs) are AC synchronous motors that are highly efficient, reliable, high-power factor, and high-power density motor drive systems. It is industrially relevant and a better alternative for induction motors. In a dual induction motor (IM), the parallel operation is stable due to the presence of slip. But in dual PMSM with different load torque, there is an oscillation that occurs in one motor and it loses synchronism. So, the control techniques used in dual IM are not applicable for dual PMSM. However, it is also necessary to control the speed of dual PMSM. This paper aims to describe the various control strategies that can be very efficiently used in dual PMSM.