Rotor Design of a Line-Start Synchronous Reluctance Machine with Respect to Induction Machine for Industrial Applications
Paper in proceeding, 2018

This paper introduces a unique rotor design for line-start synchronous reluctance machines. Efficiency and synchronization capability are determined and a comparison between line-start synchronous reluctance machines and induction machines is drawn. For the design and simulation, FEM calculations were used and the results were experimentally verified. Within the frame of this paper a 4 kW rated induction machine with an efficiency class rating of IE3 was chosen as a benchmark motor. The new rotor-cage design of the line start reluctance machine decreases the motor losses at steady state by about 28%. This promising approach could be used to upgrade induction machines in industry environments instead of replacing them. Nevertheless, a challenge in the design is a good balance between the steady state performance and synchronization capability, whereby the range of industrial applications is limited for high efficient line-start synchronous reluctance machines.

Synchronous reluctance machine (SynRM)

Induction machine (IM)

Flux barrier

Direct-on-line (DOL) start

Line start


Finite element method (FEM)



Anton Kersten

Chalmers, Electrical Engineering, Electric Power Engineering

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering

Daniel Pehrman

Chalmers, Electrical Engineering, Electric Power Engineering

Proceedings - 2018 23rd International Conference on Electrical Machines, ICEM 2018

Vol. 24 October 2018 393-399 8507053
978-153862477-7 (ISBN)

ICEM 2018
Alexandroupoli, Greece,

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering



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