Performance improvement of a linear permanent magnet synchronous motor drive using fuzzy logic controller

In this paper control system of a linear permanent magnet synchronous motor is designed and modeled. This system uses both traditional controller (PID) and fuzzy logic controller (FLC) and their performances are compared. Disadvantages of PID controller are uncertainty of load fluctuations, system parameters variation, undesirable rise time, settling time and large steady-state error. On contrary to PID controller, FLC improves control criteria and provides more robustness against load variation and system uncertainty. Application of FLC decreases the force ripples and therefore motor current waveform becomes sinusoidal.