Abstract：Field-modulated permanent magnet linear (FMPML) motors have the advantages of low cost, high thrust density, high efficiency, etc., and are suitable for long-distance applications. However, this motor suffers from lower power factor, which increases the reactive voltage of the power supply; namely, when the DC bus voltage is fixed, the speed regulation range is narrow. In this paper, a unit power factor field weakening control strategy based on flying capacitor open-end winding FMPML motor is proposed. Through the unit power factor modulation strategy, the active and reactive power required for the motor is decoupled, and the reactive voltage of the power inverter is reduced to operate at a unit power factor. Combined with the field weakening control strategy, the motor speed control range is extended to improve the system control performance. The effectiveness of the proposed control strategy is verified by simulation and experimental results.
宋鑫鑫, 赵文祥, 成瑀. 开绕组磁场调制永磁直线电机的单位功率因数弱磁控制[J]. 电工技术学报, 2021, 36(5): 893-901.
Song Xinxin, Zhao Wenxiang, Cheng Yu. Unity Power Factor Field Weakening Control of Field-Modulated Permanent Magnet Linear Modulation Motor with Open Winding. Transactions of China Electrotechnical Society, 2021, 36(5): 893-901.
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2021, Vol. 36 
