Design and Analysis of Nonoverlapping Winding Line Start Synchronous Reluctance Motor

Abstract

In this paper, the design and analysis of the Line Start Synchronous Reluctance Motor (LS-SynRM) are presented. The proposed LS-SynRM is equipped with multilayer Nonoverlapping Winding (NW). The proposed design consists of 2× 18 slots and 6 magnetic poles. A comprehensive analysis of both parallel and series winding configurations, alongside their impact on electromagnetic performance and fault-tolerant capabilities, is also presented in this paper. Furthermore, the impact of rotor cage bar design on the performance of the proposed machine is studied. Electromagnetic performance for different rotor cage designs, namely rectangular cage bars, filleted cage bars, and round cage bars, is analyzed and compared. To verify the electromagnetic performance of the designs, Finite Element Analysis (FEA) is carried out. NWLS-SynRM with round cage bars provides lower iron and rotor cage bar losses; however, the average torque is reduced. Results indicate that NWLS-SynRM with a round cage provides better overall performance in terms of loss minimization, while the integration of multilayer NW topology in a 2× 18 slot/6-pole configuration enhances fault tolerance in parallel windings and reduces MMF harmonics compared to those in single-layer designs.