Affiliation of Author(s):自动化学院
Journal:IEEE Trans Power Electron
Abstract:Owing to high driving power, good controllability, and strong fault-tolerant ability, a three-phase open-end winding permanent magnet synchronous motor driven by a dual inverter with common dc bus is considered as a competitive solution. However, a path for zero-sequence current is provided in this drive topology. Thus, the system loss would be increased, and the maximum output power is limited. In order to suppress the zero-sequence current, a novel space vector pulsewidth modulation (SVPWM) strategy based on the hysteresis controller of zero-sequence current is proposed in this paper. The voltage vectors, whose polarity of zero-sequence voltages (ZSVs) is opposite with the polarity of zero-sequence current, are selected as the basic voltage vectors of SVPWM for fundamental plane. Meanwhile, the linear modulation range is analyzed. According to the analysis results, the proposed strategy has the advantage of wide linear modulation range of ZSV under the condition of high fundamental modulation ratio. The experimental results show that the zero-sequence current is effectively suppressed by the proposed modulation strategy. Furthermore, the comparative evaluation of the proposed modulation strategy, the conventional SVPWM, the SVPWM with zero ZSVs, and the zero vector redistribution SVPWM with zero-sequence current proportional-resonant controller is conducted to demonstrate the superiority of the proposed strategy. © 1986-2012 IEEE.
ISSN No.:0885-8993
Translation or Not:no
Date of Publication:2019-04-01
Co-author:Lin, Xiaogang,Wang, Le,wl
Correspondence Author:Lin, Xiaogang,Huangwenxin
Date of Publication:2019-04-01