High Precision Control of Flux Switching Linear Rotary Machine for Reelwinder

Since there is still large amplitude of the detent force of a flux switching linear rotary machine, the response time is long using space vector pulse width modulation control method when it works in linear motion at low speed. In order to reduce the disturbances, the sliding mode control method is adopted both in linear and rotary motions direction. An improved two degree of freedom permanent magnet flux linkage sliding mode observer is designed, which can suppress the torque and thrust pulsation of the motor and retain the torque and thrust output capacity. The stability and accuracy of the system have been greatly improved, which are verified by the experiment test.