A Direct Torque Control Strategy of Induction Motor Drives with Simple Duty Ratio Regulator
Li Zhengxue1, Zhang Yongchang2, Li Zhengxi2, Ban Xiaojuan1, Yang Haitao2
1. University of Science & Technology Beijing Beijing 100083 China; 2. Power Electronics & Motor Drivers Engineering Research Center of Beijing North China University of Technology Beijing 100144 China
Abstract:In order to solve the problems of high torque ripple and variable switching frequency in conventional direct torque controlled(DTC) induction motor drives, the existing literature have proposed some methods to reduce torque ripple by optimizing the duty ratio of the active vector. However, these methods are usually complicated and parameter dependent. After comparing three typical kinds of duty determination methods, this paper proposes a very simple but effective method to obtain the duty ratio. The proposed scheme is able to reduce the torque and flux ripples significantly while maintaining the simplicity and robustness of the conventional DTC at the most. Simulations and presented experimental results validate the effectiveness of the proposed schemes in this paper.
李政学, 张永昌, 李正熙, 班晓娟, 杨海涛. 基于简单占空比调节的异步电机直接转矩控制[J]. 电工技术学报, 2015, 30(1): 72-80.
Li Zhengxue, Zhang Yongchang, Li Zhengxi, Ban Xiaojuan, Yang Haitao. A Direct Torque Control Strategy of Induction Motor Drives with Simple Duty Ratio Regulator. Transactions of China Electrotechnical Society, 2015, 30(1): 72-80.
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