Single Resistor Sampling Reconstruction of Permanent Magnet Synchronous Motor Considering Non-Observation Area Compensation
Wei Haifeng1, 2, Lu Yanru1, 2, Jiang Tingyu1, Li Yuanjiang1, 2, Chu Jianhua2
1. School of Electronics and Information Jiangsu University of Science and Technology Zhenjiang 212000 China; 2. Jiangsu Kai Xuan Intelligent Technology Co. Ltd Suzhou 215000 China
Abstract：To further realize the low cost, small size and high performance of permanent magnet synchronous motor (PMSM) vector control, a novel three-phase current reconstruction method based on single current sensor is proposed. The principle of three-phase current reconstruction technique is studied, and the relationship between DC-bus current and phase currents of SVPWM controlled three-phase inverter is set up in different voltage vectors combined with the motor drive system. The region in which the phase current is unable to reconstruct is defined as non-observation area. Through adjusting the duty ratio of SVPWM, a novel method using the non-observation area compensation for solving the problem of reconstruct phase current in non-observation area is proposed. The comparisons of experimental results verify the validity and reliability of this method.
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2018, Vol. 33 
