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On the Influence of Increased Stator Leakage Inductance in Single Tooth Wound Synchronous Reluctance Motors

Lookup NU author(s): Chris Donaghy-Spargo, Professor Barrie Mecrow, Dr James Widmer



This is the authors' accepted manuscript of an article that has been published in its final definitive form by IEEE, 2018.

For re-use rights please refer to the publisher's terms and conditions.


IEEE This paper explores the leakage inductance of a single tooth wound synchronous reluctance motor and its influence on motor performance. It is shown that the stator leakage inductance heavily influences the true saliency ratio in synchronous reluctance motors and a large stator leakage inductance has a serious detrimental impact on the operating power factor. It is also shown through analytical and FEA analysis that synchronous reluctance motors with single tooth windings suffer an inherent high stator leakage inductance that is dominated the air gap harmonic leakage component, derived from the significant stator MMF harmonics experienced with this winding type. This explains for the first time the experimental results showing a low operating power factor compared to a distributed wound machine. Measurement of the stator leakage inductance is attempted on a prototyped machine and the standardized method is found to be lacking when single tooth windings are employed.

Publication metadata

Author(s): Donaghy-Spargo CM, Mecrow B, Widmer JD

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Industrial Electronics

Year: 2018

Volume: 65

Issue: 6

Online publication date: 13/11/2017

Acceptance date: 19/10/2017

Date deposited: 26/01/2018

ISSN (print): 0278-0046

ISSN (electronic): 1557-9948

Publisher: IEEE


DOI: 10.1109/TIE.2017.2772180


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