In a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)system sharing a common DC bus,dual zero-sequence current(ZSC)loops are inherent,leading to increased inverter capacity usage,losses,an...In a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)system sharing a common DC bus,dual zero-sequence current(ZSC)loops are inherent,leading to increased inverter capacity usage,losses,and degraded operational performance.To mitigate ZSC,the dual zero-sequence equivalent circuit of the DTP-OW-PMSM system is established,and zero-vector combinations with significant zero-sequence voltage amplitudes are employed.Since the two sets of ZSC loops are independent,four zero-vector combinations can be determined.A ZSC suppression strategy utilizing hysteresis controllers is proposed.Compared with the PI controller,hysteresis controllers offer wider bandwidth and simplify control parameter tuning.Additionally,180-degree decoupling streamlines vector selection for multiphase open-winding topologies.Furthermore,the modulation range of the proposed strategy is investigated.Finally,experiment in a direct-drive motor is implemented,and experimental results confirming its effectiveness.展开更多
基金Supported by the National Natural Science Foundation of China(52025073).
文摘In a dual three-phase open-winding permanent magnet synchronous motor(DTP-OW-PMSM)system sharing a common DC bus,dual zero-sequence current(ZSC)loops are inherent,leading to increased inverter capacity usage,losses,and degraded operational performance.To mitigate ZSC,the dual zero-sequence equivalent circuit of the DTP-OW-PMSM system is established,and zero-vector combinations with significant zero-sequence voltage amplitudes are employed.Since the two sets of ZSC loops are independent,four zero-vector combinations can be determined.A ZSC suppression strategy utilizing hysteresis controllers is proposed.Compared with the PI controller,hysteresis controllers offer wider bandwidth and simplify control parameter tuning.Additionally,180-degree decoupling streamlines vector selection for multiphase open-winding topologies.Furthermore,the modulation range of the proposed strategy is investigated.Finally,experiment in a direct-drive motor is implemented,and experimental results confirming its effectiveness.
