Speed synchronism of permanent magnet synchronous motor with dual contra‐rotating rotors under load variation

A new control approach for speed synchronism of permanent magnet synchronous motor (PMSM) with dual contra‐rotating rotors is developed. During recent years, the PMSM with dual contra‐rotating rotors has become a hot topic in academic research due to its high efficiency and simple structure. However, it is difficult to guarantee the stability of the system when the motor runs under the condition of load variation. To make sure the stability of PMSM with dual contra‐rotating rotors in all cases, a master–slave motor control method is proposed. To improve the performance and system robustness, a sliding model control method is chosen as speed control law. The proposed control strategy is implemented on a TMS320F28335 DSP board. The test results show the effectiveness of the proposed control strategy.