Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction

Abstract

Electrification in railway industry offers better performing trains with reduced pollution and maximised capacity. SynREL is gaining more interest as a candidate for traction application in place of IM due to its simple and robust structure. Consequently, induction machine (IM) and synchronous reluctance machine (SynREL) are designed and compared for same electrical (1.5 kV and 170 A), thermal and mechanical specification in this paper. IM is found to have a higher torque capability than SynREL for the same torque speed characteristics. Around 67% of the torque at both rated and maximum speed of operation is achieved by SynREL in relation to the specification. The absence of rotor cage improves the efficiency and reduces the weight of SynREL However, SynREL is found to suffer from poor power factor.

Advancements in Flux Switching Machine Optimization: Applications and Future Prospects

“…Syn. AC machines and IMs have acceptable thermal capabilities [71], [72], whereas DC Machines might require additional cooling measures for higher-power applications [73], [74]. • Construction: The complex construction of FSMs, particularly the HEFSM variant, is known for their relatively high torque density due to the unique utilization of both permanent magnets and field windings [6], [7], [9].…”