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

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...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2018-06, Vol.65 (6), p.4475-4482
Main Authors: Donaghy-Spargo, Christopher M., Mecrow, Barrie C., Widmer, James D.
Format: Article
Language:English
Subjects:
Air gaps
Coils (windings)
Electric motors
Finite element method
Inductance
Leakage
Leakage inductance
Power factor
Reactive power
Reluctance
Reluctance motors
removed rotor
Rotors
Saliency ratio
single-tooth windings
Stator windings
Stators
synchronous reluctance motors
Windings
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Summary: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 finite element analysis 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.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2017.2772180