关键词: 九开关变换器, SVPWM算法, 六相永磁同步电机, 容错控制

Abstract: A fault tolerant control strategy of nine-switch converter driving a double Y-connected phase-shift 30° permanent magnet synchronous motor (PMSM) based on SVPWM algorithm was studied. Based on the working principle of the nine-switch converter, the space voltage vector after the phase break was obtained, the suitable voltage vector was selected and the SVPWM algorithm suitable for the phase break motor was proposed. According to the corresponding constraint conditions of the motor after the fault phase, the vector space decoupling method was adopted to determine the transformation matrix, and the mathematical model of the single-phase open-circuit was established. The simulation results verified the feasibility of the fault-tolerant control strategy.

Key words: nine-switch converter, , SVPWM algorithm, , six-phase permanent magnet synchronous motor (PMSM), , fault tolerant control