Tracking improvement of LSRM at low-speed operation

This paper deals with the tracking control design of a Linear Synchronous Reluctance Motor (LSRM) drive. The modified non-linear dynamic LSRM model with the magnetic saturation included is used in the control design and realization to improve the tracking performances at very low speed of motion. The iron core saturation is included in the modified model with the experimentally determined flux linkages given as functions of the direct and the quadrature axis currents. Experimental results show that the proposed input-output linearizing tracking control with the included saturation behaves considerably better than the one without saturation, introducing smaller position and speed errors, and better drive stiffness.