Fuzzy-Sliding Mode Speed Controller with Active Damping Control for Dual PMSM Drives

Mono inverter-powered dual motor drives are specially made to be smaller and less expensive than single motor drives and their performance is mainly influenced by the capability of the controller used. For high performance, the vector control technique is preferred over other approaches. Because of the dynamics non-linearity and time-varying properties, the control is a key challenge for dual Permanent Magnet Synchronous Motor (PMSM). This paper presents a fuzzy sliding mode speed controller for dual PMSM parallel operation. Here the master motor is controlled using a vector control strategy, whereas the slave motor is controlled using an open-loop strategy. But in different load torque, there is an oscillation in the slave motor speed brought on by the shift in rotor position. Therefore, oscillations are suppressed using active damping control, which also offers stable operation. The suggested controller comprises a dual PMSM speed control and damping control designed by combining the intelligence of fuzzy logic with the SMC for the steady functioning of both motors. The Fuzzy SMC performance is also compared to PI and Fuzzy logic controller. It has been observed that the Fuzzy SMC provides a better response for speed control of dual PMSM as compared to the PI and Fuzzy logic controller.