关键词: 曲线拟合, 开关磁阻电机, 转矩脉动

Abstract:

A new method of instantaneous torque control based on current tracking was proposed. The torque-position angle plane curve of the motor model was constructed by numerical fitting method of curve fitting to construct the torque curve family of different currents. Motor chopping current limit value and instantaneous torque mapping function, through the control of current to achieve the switched reluctance motor instantaneous torque control, could reduce the torque ripple. The advantage of this method is that the current-torque mapping function is simple, the computation is small, and it is suitable for real-time control, which is helpful to reduce the resource occupancy rate of the embedded control system. The control strategy is verified by finite element method.

Key words: curve fitting, switched reluctance motor, torque ripple