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| Predictive Current Control for Permanent Magnet Synchronous Motor Based on Operating Time of Vector |
| Shi Tingna1, Zhang Wei1, Xiao Meng1, Geng Qiang2, Xia Changliang1, 2 |
1. School of Electrical and Information Engineering Tianjin University Tianjin 300072 China;
2. Tianjin Engineering Center of Electric Machine System Design and Control Tianjin 300387 China |
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Abstract In this paper, a predictive current control based on the operating time of vector is proposed for voltage source inverter(VSI)-permanent magnet synchronous motor(PMSM) drive system. The steady state performance of the system is improved by extending the finite control set and changing the selection method of the optimal voltage vector. Firstly, the finite control set(FCS) is extended by adding the virtual voltage vectors and optimized according to the different increasing and decreasing effects of vectors on the d-axis current in each sector. Then, in order to obtain the d,q-axis operating time of each vector, making the predictive d,q-axis current values of next time equals to their expected values. The d,q-axis operating time of each vector are used to evaluate the action effects on d, q-axis current, which replaces the predictive current part in the traditional model predictive current control. Meanwhile, depending on the operating time of vector to select the optimal voltage vector, the proposed method can solve the problem that the duty cycle doesn’t work effectively in the predictive current control with duty cycle modulation. Finally, the feasibility and effectiveness of the proposed approach are verified by experiments.
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Received: 26 June 2016
Published: 25 October 2017
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Corresponding Authors:
国家自然科学基金项目资助(51577134,51377121)
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2017, Vol. 32 
