Journal article

Contribution of Leakage Flux to the total Losses in Transformers with Magnetic Shunt

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Author list: Haller, Stefan

Publication year: 2020

ISSN: 0020-7217

DOI: http://dx.doi.org/10.1080/00207217.2020.1793404

View additional information: View in Web of Science


Abstract

To execute soft switching methods in resonant power converters, transformers with larger leakage inductance are getting more attention. Many papers have constructed various concepts in this regard. However, a discussion about, how the transformer efficiency is affected is lacking in the literature. This paper analyses the effects of the increased leakage inductance on the performance of the transformer. A transformer for increased leakage inductance is modelled and constructed to investigate the losses. The model discusses the effects of increased leakage inductance either by increasing the inter-winding spacing or by integrating the magnetic shunt within the transformer. The investigations show that increasing the leakage inductance by inserting a magnetic shunt can have severe degrading effects on the performance of the transformer, if not designed adequately. Additional losses are also calculated and the effects are verified by the experiments.


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