NDLI: The extended T model of the multiwinding transformer

Content Provider	IEEE Xplore Digital Library
Author	Hayes, J.G. O'Donovan, N. Egan, M.G.
Copyright Year	2004
Description	Author affiliation: Univ. Coll. Cork, Ireland (Hayes, J.G.; O'Donovan, N.; Egan, M.G.)
Abstract	In this paper, a novel model for a high-leakage multiwinding transformer is presented. This model is termed the extended T model. The model is developed by relating physical spaces within the multiwinding transformer to the leakage inductances and the mutual couplings of the transformer. The model is currently being investigated for the following areas: leakage and cross-coupling effects in resonant and hard-switched converters, modelling of EMI parasitics and AC resistance components, and modelling of poly-phase transformers, coupled inductors, and machines. In this paper, the basic model is presented and validated. A high-power high-leakage three-winding transformer is first characterized on the bench using open-circuit and series-coupling tests. This test data set yields the transformer inductance matrix composed of self and mutual inductances. The elements of the matrix are then broken down into the leakage and mutual inductances between the three windings. The physical structure of the transformer is then examined, and the new transformer model is created based on this visual examination and the knowledge of leakage and mutual inductances. The inductance matrix is also used to generate two other models: the conventional T model, and the extended cantilever model. Excellent correlation is demonstrated between all three models, PSPICE simulations, and the experimental load tests using an inductive load.
Sponsorship	IEEE Power Electon. Soc
Starting Page	1812
Ending Page	1817
File Size	316147
Page Count	6
File Format	PDF
ISBN	0780383990
ISSN	02759306
DOI	10.1109/PESC.2004.1355391
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-20
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mutual coupling Inductors Magnetic resonance Educational institutions Switching converters Automatic testing SPICE Inductance measurement Power electronics Geometry
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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