Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications

De, D.; Klumpner, Christian; Rashed, Mohamed; Patel, C.; Kulsangcharoen, P.; Asher, Greg

Abstract

This paper presents a cost effective winding design and evaluation of a medium frequency isolation transformer typically used in bidirectional isolated DC/DC converters. Since leakage inductance and winding resistance of a high frequency transformer are interdependent, any attempt to increase the leakage inductance by adjusting the winding arrangement increases the resistance as well and impacts the efficiency. This paper proposes the use of flux diverter caps made of a relatively small amount of ferrite material to get the desired value of inductance whilst maintaining the losses in the windings at reasonable levels. The proposal is experimentally evaluated on a 5kW prototype.

Citation

De, D., Klumpner, C., Rashed, M., Patel, C., Kulsangcharoen, P., & Asher, G. Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications. Presented at 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)

• Conference Name: 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)
• End Date: Mar 29, 2012
• Acceptance Date: Dec 1, 2011
• Publication Date: Mar 29, 2012
• Deposit Date: Jul 13, 2016
• Publicly Available Date: Jul 13, 2016
• Peer Reviewed: Peer Reviewed
• Article Number: A52
• Book Title: 6th IET International Conference on Power Electronics, Machines and Drives (PEMD 2012)
• DOI: https://doi.org/10.1049/cp.2012.0212
• Keywords: Leakage inductance ; Medium frequency transformer ; Winding arrangements ; Winding losses
• Public URL: https://nottingham-repository.worktribe.com/output/709626
• Publisher URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6242062
• Additional Information: Published in: PEMD 2012 : International Conference on Power Electronics, Machines and Drives, University of Bristol, UK, 27-29 March 2012. Piscataway, N.J. : IEEE, 2012. ISBN 9781849196161, doi:10.1049/cp.2012.0212
• Contract Date: Jul 13, 2016