Study on Analysis and Design of Line-Start Synchronous Reluctance Motor Considering Rotor Slot Opening and Bridges

Abstract

According to IEC 60034-1, as the industrial applications, not only efficiency but also power factor are important performance index. As a direct on line motor to replace induction motor (IM), a line-start synchronous reluctance motor (LS-SynRM) have a high efficiency but a low power factor than that of IM. In this paper, the analysis and design of LS-SynRM are performed considering the rotor slot opening and bridges for improving the efficiency and power factor. The reference machine is selected with the 2.2kW IM, the performance of reference model is analyzed based on a finite element analysis (FEA). To analyze the effect of rotor slot opening and bridges, an optimal model of LS-SynRM is designed through two step design process. First, the design of rotor slot for synchronization is performed, second, the design of barriers using the response surface method (RSM) is performed under the same condition of the stator size of IM. Based on the basic model, the performances of LS-SynRM are analyzed according to the slot opening and bridges. Furthermore, the parametric analysis is performed, and the final model is designed considering the efficiency and power factor based on the design parameters. Finally, the final model is manufactured, and the experiment is performed to verify the FEA result. IEEE