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Optimisation of an 80kW Segmental Rotor Switched Reluctance Machine for Automotive Traction

Lookup NU author(s): Dr James Widmer, Dr Richard Martin, Professor Barrie Mecrow



There is significant interest in the development of Switched Reluctance Machines for use in automotive traction applications. This has been driven by their low cost compared to rare earth Permanent Magnet based motors, driven by the high cost of rare earth permanent magnets, coupled with their potential for competitive torque densities. This paper describes the development of a variant of the Switched Reluctance Machine, utilising a Segmental Rotor construction, which has previously been demonstrated to provide the potential for significant improvement in torque densities compared to Switched Reluctance Machines with a conventional toothed rotor construction. The paper describes a strategy which has been developed to optimise the Segmental Rotor SRM to maximise efficiency, with the aim of achieving performance equivalent to that of the 80kW Interior Permanent Magnet machine utilised in Nissan’s LEAF electric vehicle. Optimisation applies a combination of static and dynamic analyses in order to achieve a full and computationally efficient assessment of motor performance across different regions of the torque speed envelope. Test results from a prototype motor are also presented.

Publication metadata

Author(s): Widmer JD, Martin R, Mecrow BC

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Industry Applications

Year: 2015

Volume: 51

Issue: 4

Pages: 2990-2999

Print publication date: 15/07/2015

Online publication date: 20/02/2015

Acceptance date: 09/02/2015

Date deposited: 11/02/2015

ISSN (print): 0093-9994

ISSN (electronic): 1939-9367

Publisher: IEEE


DOI: 10.1109/TIA.2015.2405051


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