Direct Torque Control of Asynchronous Motor Based on Hybrid Flux Observer
Liu Yang1, 2,Shi Li-ming1 , Zhao Lu1,Li Yao-hua1
1. Key Laboratory of Power Electronic and Electric Drive Institute of Electrical Engineering Chinese Academy of Science Beijing 100190 2. University of Chinese Academy of Science Beijing 100190
Abstract：Because of the voltage drop on asynchronous motor stator resistance, the voltage vector chosen by traditional 6-sector direct torque control (DTC) method appears to be invalid around the sector divide. Through 12-sector method, this problem was solved and control reliability was improved. Considering the features of voltage and current model flux observer, a novel hybrid model which suits for high sampling frequency was presented, and the frequency response function (FRF) was deduced. From the FRF and simulation, comparison of the voltage, current and hybrid model observer performance was implemented, while the motor parameters varied. Finally, the effectiveness of the proposed hybrid model is proved by the experimental results.
刘洋,史黎明,赵鲁,李耀华. 一种基于混合型磁链观测器的异步电机直接转矩控制[J]. 电工技术学报, 2015, 30(10): 157-163.
Liu Yang,Shi Li-ming , Zhao Lu,Li Yao-hua. Direct Torque Control of Asynchronous Motor Based on Hybrid Flux Observer. Transactions of China Electrotechnical Society, 2015, 30(10): 157-163.
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