Optimal sinusoidal currents for avoiding torque pulsations after the loss of one phase in polyphase SMPM synchronous motor

Critical applications need actuators with high efficiency and high reliability. Electromechanical actuators can fulfill those criteria by using a polyphase PMSM with decoupled phases due to its high torque/mass ratio for the efficiency and its ability to perform its mission after the loss one phase for the reliability. This paper investigates how to avoid torque pulsations when one phase goes in open-circuit by adapting the currents in the remaining phases. It ends by a comparison of the solution imposing to the currents to remain sinusoidal with that imposing to the currents to minimize Joule´s losses.