Combining an Internal SMC with an External MTPA Control Loop for an Interior PMSM

This paper deals with control strategies in Permanent Magnet Synchronous Machines (PMSMs). An internal loop control is proposed in which a Sliding Mode Control (SMC) works to control the optimal desired current calculated by the Maximum Torque per Ampere (MTPA) strategy which works in the external loop of control. The main contribution of the paper is to show how disturbance rejection is provided together with a load compensation. Simulation results are shown comparing, with the same control scheme, the performances obtained with SMC and Pronortional-Intezral controllers (PI).

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