Design Optimization of Transversely Laminated Synchronous Reluctance Machine for Flywheel Energy Storage System Using Response Surface Methodology

Abstract

Design and optimization of synchronous reluctance machine for medium-speed flywheel energy storage system (FESS) applications is presented in this paper. High efficiency and high torque density are the main design criteria of the motor/generator system for electromechanical storage systems. Moreover, high salience ratio and appropriate stator design are required to achieve a high torque density and acceptable efficiency in synchronous reluctance machine. In this paper, the effects of key design parameters on the performance of the motor/generator system are investigated and an optimization procedure based on response surface methodology coupled to finite-element model is performed to achieve optimum value for stator and rotor parameters. The finite-element simulation results confirm that the performance of FESS improves significantly in comparison with initial design, by using the proposed design procedure. Finally, a prototype motor/generator system is implemented and experimental results are presented.