Performance comparison of inverter control techniques used for the supply of a linear PM synchronous actuator

This paper presents performance comparison of three inverter control techniques. These techniques are respectively hysteresis control, PWM control and direct voltage control (DVC). They are applied for a PM Linear Tubular Synchronous Actuator (PMTLSA) drive fed, using a three phase voltage source inverter (VSI). This VSI is working with constant switching time intervals as in the standard torque control DTC system. The dynamic modeling of the studied actuator taking into account the magnetic nonlinearities is firstly presented. Then, an autopilot scheme using three control techniques to the VSI is successfully implemented and simulated under Simulink environment. Simulation results show large differences between the three control strategies and prove the excellent performance of DVC approach, compared to PWM and hysteresis control techniques.