永磁同步电机直接交轴磁链控制

Direct Q-Axis Flux Linkage Control for Permanent Magnet Synchronous Motor

隐极式永磁同步电机转矩中定子磁链幅值和转矩角均为可控变量,两者的共同作用效果即为交轴磁链.以定子绕组星形连接的永磁同步电机为例,提出了一种通过控制交轴磁链实现对电机转矩直接控制的方法.该方法直接根据转矩控制要求选择优化的电压矢量实现对电机交轴磁链的控制,不要求保持定子磁链幅值恒定,不需要复杂的坐标变换.仿真结果验证了理论分析的正确性和控制方法的可行性.

The amplitude of stator flux linkage and torque angle are controllable variables in non-salient pole permanent magnet synchronous motor, and the interaction effect of stator flux linkage amplitude and torque angle is Q-axis flux linkage. Taking the permanent magnet synchronous motor with Y connected stator winding for example, a novel direct torque control method through the control of Q-axis flux linkage is presented. This method selects the required voltage vector according to the torque control requirement directly without constant stator flux linkage amplitude control and complex coordinate transformation. The correction and feasibility of the proposed method are verified by the simulation re-sults.