Transient analysis of a start-up synchronous reluctance motor with symmetrical distributed rotor cage bars

This paper deals with the transient analysis of direct-on-line synchronous reluctance motor (SynRM) with symmetrical distributed rotor cage bars. Finite Element is utilized to analyze the transient behavior in both synchronized and unsynchronized regimes of the direct-on-line SynRM. In this paper two Synchronous reluctance motors are modelled and analyzed. The first motor is referred to as SynRM1. It has cage bars in the rotor iron structure above the flux barrier and placed near the machine's airgap. The second is labelled as SynRM2, where the cage bars are inserted in the flux barriers. The characteristic behavior in synchronized and unsynchronized regimes of both SynRMs are obtained on no-load and full-load, through ac magnetic-transient solver. Other performance indexes of interest, such as the efficiency and power factor are also analyzed.