Design and Analysis of an IE4 Class Line-Start Synchronous Reluctance Motor Considering Total Loss and Starting Performance

Abstract

In this paper, an optimum design for a three-phase line-start synchronous reluctance motor (LS-SynRM) with respect to efficiency, maximum torque, and starting torque is proposed. The design variables, objective functions, and constraints are selected for this optimum design, which is divided into two steps. Step I maximizes the rated efficiency, while maintaining balanced operation and minimizing the stator copper loss. Step II calculates the precise starting torque using finite element analysis (FEA). The validity of the optimum design is verified by comparing the efficiency, maximum torque, and starting torque characteristics of the time-step FEA with experimental results.