A New Transformer Model with Separate Common-Mode and Differential-Mode Capacitance

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Abstrakt

A new transformer equivalent circuit model is presented containing separate common-mode and differential-mode capacitors, allowing for direct and simple analysis of the transformers influence. The representation of common-mode and differential-mode signals in two-winding transformers have been described and presented. Problems related to two commonly used transformer equivalent circuit models are shown. Operation scenarios of an isolated full bridge phase-shift DC/DC converter is used to compare the new transformer model with a commonly used model. Three transformers with different turns-ratio are constructed, with the purpose of evaluating the transformer models. Both models provided accurate impedance prediction for transformers with turns-ratio equal to one. However, for turns-ratios different from one, the commonly used model has an error of 40%-132% in the predicted equivalent capacitance of the measurements, whereas the proposed model only has an error of 0.6%-7.3%. The proposed model is therefore the only model that predicts accurate transformer behavior for any turns-ratio.

OriginalsprogEngelsk
TitelProceedings - IECON 2020 : 46th Annual Conference of the IEEE Industrial Electronics Society
ForlagIEEE
Publikationsdato18. okt. 2020
Sider1198-1204
Artikelnummer9255142
ISBN (Elektronisk)9781728154145
DOI
StatusUdgivet - 18. okt. 2020
Begivenhed46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020 - Virtual, Singapore, Singapore
Varighed: 19. okt. 202021. okt. 2020

Konference

Konference46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020
Land/OmrådeSingapore
ByVirtual, Singapore
Periode19/10/202021/10/2020
SponsorIEEE Industrial Electronics Society, SPECS - Smart Grid + Power Electronics Consortium Singapore, The Institute of Electrical and Electronics Engineers (IEEE)
NavnIECON Proceedings (Industrial Electronics Conference)
Vol/bind2020-October
NavnProceedings of the Annual Conference of the IEEE Industrial Electronics Society
ISSN1553-572X

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