Position-sensorless control of the transverse-laminated synchronous reluctance motor

The sensorless control of the transverse-laminated synchronous reluctance m otor is introduced, pointing out the negative effect of cross saturation. T hen, an observer-based sensorless control scheme is proposed which solves t his problem. Thus, a very good robustness against load variations is achiev ed. Moreover, the working speed is extended from zero to maximum speed, inc luding the flux-weakening feature. This is obtained by a combined method of rotor position estimation, making use of both electromotive-force-based es timation and signal injection, without any need of additional voltage. A pr ototype drive has been assembled, making use of a commercial motor, and the obtained experimental results are given. A dynamic performance is achieved which is near to that of a sensored control, in the whole speed range. Mor eover, position-sensorless position control is feasible.