中文摘要：

双逆变器供电的开放式绕组永磁同步电机（open-end winding permanent magnet synchronous motor,OEW-PMSM）系统作为一种新型电机驱动拓扑,其直流母线电压利用率高、绕组电流控制自由度大、容错能力强,在电力拖动领域具有良好的应用价值。该文建立了OEW-PMSM的数学模型及其采用双逆变器供电的矢量控制系统,结合双逆变器工作原理和输出矢量,分析系统零序电压和零序电流问题,采用不产生零序电压的电压矢量进行空间矢量脉宽调制（space vector pulse width modulation,SVPWM）来消除零序电压,并给出实现算法。在采用消除零序电压的SVPWM控制时,双逆变器供电的OEW-PMSM可以将基速提高为星接绕组时的1.7倍,降低了系统弱磁设计和控制的难度。仿真和实验验证了所提方法的正确性和可行性。

英文摘要：

Open-end winding permanent magnet synchronous motors（OEW-PMSMs） fed by dual inverters as a kind of novel drive topology have competitive application prospects in the electric drive field for their high utility of DC-link voltage, more control freedoms of currents and good fault-tolerant ability. The mathematic model and vector control system fed by the dual inverter of OEW-PMSMs were built. Based on the principle and output voltage vectors of the dual inverter, the zero-sequence voltage and current were analyzed, and a SVPWM switching strategy which employs voltage vectors that do not contribute to zero-sequence voltage was proposed to eliminate zero-sequence voltage. And, its implement algorithm was discussed. The basic speed of the OEW-PMSM fed by the dual inverter with the zero-sequence voltage eliminated SVPWM strategy can be improved to 1.7 times of the star-connected winding permanent magnet synchronous motor（SCW-PMSM）. Therefore, the difficulty of their flux-weakening design and control can be reduced greatly. The proposed method is validated by simulation and experimental results.