Feedforward control of high-speed solid-rotor synchronous reluctance machines with rotor dynamics model

An open-loop current regulator for a high-speed synchronous reluctance machine with a solid conducting rotor is presented. A rotor dynamic model is developed which is similar to an induction machine model yet includes a magnetic saliency of the rotor. The model is then used to calculate command voltages for a desired current in an open-loop current regulator. Techniques for parameter extraction and discrete-time models for digital implementation are discussed. Experimental results, including a 120 kW discharge of a flywheel energy storage system, validate the performance of the controller.