正弦波电动势永磁无刷直流电动机稳态特性计算

Computation of Steady-State Performance of the Sine Wave Electric Potential Permanent-Magnet Brushless DC Motor

基于两相导通星形三相六状态正弦波永磁无刷直流电动机的相绕组端电压平衡方程式,通过微分方程解析演算,推导了其相电流的解析公式,对正弦波电动势永磁无刷直流电动机的稳态特性进行仿真计算。以绕组电感为零的正弦波永磁无刷直流电动机作为特例,推导了新电路模型下基本性能参数的计算公式,并与传统不计绕组电感的电路模型进行比较研究,验证了该解析公式的正确性。

Based on the terminal potential circuit equation of the three-phase full-bridge sine wave electric potential permanent-magnet brushless DC motor （PMBLDCM） with wye-conneeted phase winding and with two transistors conducting at anytime, the analytical expression of the phase current was induced by the solution of differential equation, and the steady-state performance was also simulated and analyzed. The analytical expressions of basic performance parameters were derived under the condition of the new equivalent circuit＇s model which was established for a sine wave PMBLDCM neglecting the winding inductance. The comparison between the new circuit model and the traditional circuit model neglecting winding inductance demonstrated the correctness of the analytical expressions.