Developments of sensorless synchronous reluctance drive systems

This paper discusses the development of synchronous reluctance (SYNCREL) drive systems, including sensorless control, and their applications as high performance servo drives. Various sensorless techniques are discussed and reviewed. A new sensorless algorithm for a synchronous reluctance motor drive is also presented. It is a parameters-dependent technique for estimating the rotor position on-line from the measurements of two-phase currents and applied voltages. The position is estimated using the saturated machine d-q model equations.