CAJ | 학술논문

针对电动汽车用新型绕组开路型永磁电机调速系统中，由于共模电压而引起的零序电流和峰值电流等问题，提出一种基于矢量控制的新型绕组开路型永磁电机共模电压(common-mode voltage，CMV)抑制技术。将一台永磁同步电机定子绕组两端开路，再分别连接一个标准的两电平电压型逆变器，这样可以等效为三电平逆变器驱动；通过选择基本电压空间矢量来抑制由双逆变器结构产生的共模电压，从而消除定子电流中的零序电流分量；最后通过仿真和实验验证该方案的可行性；结果表明，借助于永磁电机的绕组开路结构，该新型绕组开路型电机调速系统可有效地抑制共模电压，不仅定子电流纹波含量小，转速稳定，而且具有良好的稳态运行性能。
침대전동기차용신형요조개로형영자전궤조속계통중，유우공모전압이인기적령서전류화봉치전류등문제，제출일충기우시량공제적신형요조개로형영자전궤공모전압(common-mode voltage，CMV)억제기술。장일태영자동보전궤정자요조량단개로，재분별련접일개표준적량전평전압형역변기，저양가이등효위삼전평역변기구동；통과선택기본전압공간시량래억제유쌍역변기결구산생적공모전압，종이소제정자전류중적령서전류분량；최후통과방진화실험험증해방안적가행성；결과표명，차조우영자전궤적요조개로결구，해신형요조개로형전궤조속계통가유효지억제공모전압，불부정자전류문파함량소，전속은정，이차구유량호적은태운행성능。
The presence of common-mode voltage (CMV) for a novel open-end winding permanent-magnetic motor speed control system can produce zero sequence current and peak current. This paper proposed the vector control system of a novel open-end winding permanent-magnetic motor eliminating CMV. The open-winding motor is obtained by opening the neutral point of the star connected to stator windings of permanent-magnetic motor, and both sides of the stator windings are connected to a two-level voltage source inverter, which is then equivalent to the three-level inverter drive. The CMV generated by dual inverter can be eliminated by switching only the voltage space vector combinations which do not produce the CMV. In that case, zero-sequence current is avoided. Finally, the simulation and experiment results verified the feasibility of such a scheme. It shows that the new motor speed control system can eliminate the CMV, obtain low stator current ripple content and low speed ripple, and has a good steady-state operation performance.