Abstract：This paper proposes a vector control strategy of brushless DC motor (BLDCM) based on rotor field orientation considering the non-sinusoidal field distribution, which can not only suppress the torque ripple without the detection of commutation zone, but also solve the problems of magnetization and demagnetization caused by d-axis armature reaction. Firstly, through the comparative analysis of the rotor flux waveform under different rotor field distributions, it is concluded that the 3s/2r transformation with the rotor position as rotation angle cannot achieve rotor field orientation when rotor field distribution is non-sinusoidal. Secondly, by changing the rotation angle in the 3s/2r transformation matrix, the rotor flux has no q-axis component after the transformation, thereby establishing a non-sinusoidal rotor field orientation coordinate system and obtaining a dynamic mathematical model under this coordinate system. Finally, the d-axis and q-axis armature currents for a given reference torque without d-axis armature reaction is deduced theoretically, and accordingly the rotor field oriented vector control system without d-axis armature reaction of BLDCM is constructed. The results of DSP experiments show the feasibility and effectiveness of the proposed strategy.
李珍国, 孙启航, 王鹏磊, 崔屹峰. 无刷直流电机无直轴电枢反应的非正弦转子磁场定向矢量控制技术[J]. 电工技术学报, 2022, 37(16): 4094-4103.
Li Zhenguo, Sun Qihang, Wang Penglei, Cui Yifeng. Non-Sinusoidal Rotor Field Oriented Vector Control Technology Without d-Axis Armature Reaction in Brushless DC Motor. Transactions of China Electrotechnical Society, 2022, 37(16): 4094-4103.
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2022, Vol. 37 
