Analysis and Control of the Permanent Magnet Synchronous Motor with Auxiliary Modular Design

U-shape core permanent magnet synchronous motor (PMSM) has the features of small size, simple and robust construction, generally working in the low power and low cost industry applications [1], [2]. Due to the simple structure and the self-starting ability, single-phase PMSM with U-shape core got more attentions in early research and application, however, its development was limited by motor large torque ripple and low efficiency. As one effective way to solve the problem, the PMSM with auxiliary modular design comes out [2], which can obtain a smooth operation feature with shifted magnets array and supply the opportunity for fault tolerant control. Based on the two-phase PMSM with auxiliary modular design, the motor mathematical model and the fault tolerant control configuration are presented in this paper to illustrate motor characteristics and achieve the fault-tolerant ability. Finally, the motor prototype is tested and the experimental results are used to verify the proposed steady operation and the fault-tolerant strategy.