Abstract：The equivalent model of a brushless DC motor (BLDCM) with the rotor field orientation has the characteristics that the d-axis rotor flux linkage is constant and the q-axis rotor flux linkage is zero. It isa favorable condition for building high-performance torque control systems. However, the traditional equal-power 3s/2r coordinate transformation cannot obtain the equivalent model of the rotor field orientation of BLDCM. Therefore, a rotor field orientation method based on per-phase coordinate transformation is proposed. That is, per-phase is transformed one by one to obtain the rotor field orientation equivalent model of per-phase winding, and then the three-phase is synthesized based on the principle of power conservation. Since the torque of the equivalent model is proportional to the q-axis current and independent of the d-axis current, the relationship between the d-axis armature reactive magnetomotiveforce, torque and the d- and q-axis currents is derived. Consequently, a BLDCM torque control system with non-magnetization/demagnetization is constructed. Finally, the feasibility and effectiveness of the proposed control technology are verified by Matlab simulation and DSP driving experiment.
李珍国, 王鹏磊, 孙启航, 贾益丞. 基于逐相旋转坐标变换的无刷直流电机转子磁场定向瞬时转矩控制技术[J]. 电工技术学报, 2022, 37(22): 5788-5798.
Li Zhenguo, Wang Penglei, Sun Qihang, Jia Yicheng. Rotor Field Oriented Instantaneous Torque Control Technology of Brushless DC Motor Based on Per-Phase Rotating Coordinate Transformation. Transactions of China Electrotechnical Society, 2022, 37(22): 5788-5798.
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2022, Vol. 37 
