VAJIHEH VAFAEI
HOSSEIN KHEIRI
MOHAMMAD JAVIDI

In this paper, we investigate the chaotic behaviors of the fractional-order permanent magnet synchronous motor (PMSM) system. The necessary condition for the existence of chaos in the fractional-order PMSM system is deduced and an active controller is developed based on the stability theory for fractional systems. Thepresented control scheme is simple and exible, and it is suitable both for design and for implementation in practice. Simulation iscarried out to verify that the obtained scheme is e cient and robust for controlling the fractional-order PMSM system.