关键词: 开关磁阻电机, 迭代学习控制, 位置信号倍频

Abstract:

A phase current control strategy of SRM based on iterative learning control was studied. Commonly used photoelectric position sensors cannot locate other points between the rising edge and falling edge of the motor position signal. However, the control strategy studied was based on position points. Therefore, an edge detection circuit with input limiting function and a position signal multiplier circuit was implemented by using a CPLD. The experiments show that the control strategy successfully multiplies the position signal of the motor and the phase current gradually converges to the desired current at each position. By employing proposed strategy, the performance of current control can be improved apparently and switch frequency can be reduced.

Key words: switched reluctance motor (SRM), iterative learning control (ILC), position signal frequency multiplication