Position/force control with a lead compensator for PMLSM drive system

Currently, many efforts are made to simplify the control algorithms and shorten the sampling period in the applications with permanent magnet linear synchronous motors (PMLSMs). In this paper, a proportional integral derivative (PID) position/force control with a lead compensator is presented. Different from the conventional cascade control method, the position/force control strategy, with a simple control structure, directly realizes the transformation from the position reference to the drive force in the drive system. The lead compensator enlarges the phase angle margin at low frequency and improves the dynamic performance of the system. To verify the effects of the proposed control strategy, the approach is applied in a PMLSM drive system with force disturbance compensation. The results of the simulation and experiment illustrate the correctness and effectiveness of the proposed control method.