Open-circuit Fault-tolerant Direct Torque Control With Low Torque Ripple for Six-phase and Three-phase PMSM Series-connected System

被引：0
|
作者：
Duan Q. [1 ]
Zhou Y. [1 ]
Qu A. [1 ]
机构：
[1] Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou University, Fuzhou, 350116, Fujian Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Direct torque control; Fault-tolerant control; Six-phase PMSM and three-phase PMSM series-connected system; Variable proportion integral separated PI;
D O I：
10.13334/j.0258-8013.pcsee.181762
中图分类号：
学科分类号：
摘要：
A direct torque control strategy with precise torque and flux control was proposed for the open-circuit fault in the drive system of six-phase permanent magnet synchronous motor (PMSM) and three-phase PMSM connected in series. Based on the relationship between torque, torque angle and the amplitude of stator flux, the stator flux increment in each digital cycle was established in two subspaces by variable proportional integral separation PI. Then, based on the stator voltage equations, the reference value of the voltage vector in two subspaces was calculated. The actual voltage of zero sequence plane was calculated by the voltage equation on zero sequence plane. In order to decouple the control of the two motors, and control the torque and flux simultaneously, the duty cycle of healthy phase was calculated according to the value of voltage on three planes. The simulation and experimental results show that the duty cycle modulation direct torque control (DCM-DTC) proposed can realize the decoupling control of the two motors, and the system can switch smoothly from fault-free condition to open-circuit fault condition. Compared with the traditional direct torque control, the torque ripple and flux amplitude ripple are greatly reduced. © 2019 Chin. Soc. for Elec. Eng.
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页码：347 / 358
页数：11
相关论文
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