Sensorless Control of Synchronous Reluctance Motor over Full Speed Range

This paper presents a sensorless control of synchronous reluctance motor (SynRM) over full speed range. The control algorithm is based on Model Reference Adaptive System（MRAS） at low speed and flux observer at medium and high-speed. Moreover, considering the serious core saturation of SynRM, which includes cross saturation between the d-axis and q-axis, an off-line parameter adaptive algorithm is used in the sensorless control algorithm over full speed range. The simulation results show that the parameter adaptive algorithm dramatically improves the position estimation accuracy.