A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer

K. V. Iyer; M. Cai; D. Murthy-Bellur; B. Palmer; N. Mohan

doi:10.1109/ECCE.2017.8096584

A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer

K. V. Iyer
, M. Cai
, D. Murthy-Bellur
, B. Palmer
, N. Mohan

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

8 Scopus citations

Abstract

Power transformers are an integral part of an isolated DC-DC converter with a high voltage ratio. An essential requirement of such a transformer design is to achieve a low leakage inductance for power transfer. This paper proposes a transformer design using foil conductors with a half-turn high-current (HC) winding which has the following benefits: 1) less number of turns in both of the HC and low-current (LC) windings in comparison to a conventional design; 2) easy termination of the LC winding; 3) low leakage inductance by virtue of less number of turns and ease of interleaving of the LC and HC windings. The incorporation of half-turn HC windings provides openings through which the LC winding turns can pass. This allows the LC winding turns to be wrapped continuously, resulting in easy interleaving and termination. Analytical design followed by 3-D FEA results and bench top measurements on a hardware prototype are provided for a half-turn-winding transformer designed for a 12-288V, 3kW, 50kHz DC-DC converter.

Original language	English (US)
Title of host publication	2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	3222-3227
Number of pages	6
ISBN (Electronic)	9781509029983
DOIs	https://doi.org/10.1109/ECCE.2017.8096584
State	Published - Nov 3 2017
Event	9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017 - Cincinnati, United States Duration: Oct 1 2017 → Oct 5 2017

Publication series

Name	2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017
Volume	2017-January

Other

Other	9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017
Country/Territory	United States
City	Cincinnati
Period	10/1/17 → 10/5/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

Keywords

Compact design
DC-DC converter
Foil winding
Half-turn winding
Interleaving
Low leakage inductance
Transformer

Publisher link

10.1109/ECCE.2017.8096584

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Iyer, K. V., Cai, M., Murthy-Bellur, D., Palmer, B., & Mohan, N. (2017). A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer. In 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017 (pp. 3222-3227). Article 8096584 (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017; Vol. 2017-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2017.8096584

A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer. / Iyer, K. V.; Cai, M.; Murthy-Bellur, D. et al.
2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 3222-3227 8096584 (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017; Vol. 2017-January).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Iyer, KV, Cai, M, Murthy-Bellur, D, Palmer, B & Mohan, N 2017, A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer. in 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017., 8096584, 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017, vol. 2017-January, Institute of Electrical and Electronics Engineers Inc., pp. 3222-3227, 9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017, Cincinnati, United States, 10/1/17. https://doi.org/10.1109/ECCE.2017.8096584

Iyer KV, Cai M, Murthy-Bellur D, Palmer B, Mohan N. A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer. In 2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 3222-3227. 8096584. (2017 IEEE Energy Conversion Congress and Exposition, ECCE 2017). doi: 10.1109/ECCE.2017.8096584

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abstract = "Power transformers are an integral part of an isolated DC-DC converter with a high voltage ratio. An essential requirement of such a transformer design is to achieve a low leakage inductance for power transfer. This paper proposes a transformer design using foil conductors with a half-turn high-current (HC) winding which has the following benefits: 1) less number of turns in both of the HC and low-current (LC) windings in comparison to a conventional design; 2) easy termination of the LC winding; 3) low leakage inductance by virtue of less number of turns and ease of interleaving of the LC and HC windings. The incorporation of half-turn HC windings provides openings through which the LC winding turns can pass. This allows the LC winding turns to be wrapped continuously, resulting in easy interleaving and termination. Analytical design followed by 3-D FEA results and bench top measurements on a hardware prototype are provided for a half-turn-winding transformer designed for a 12-288V, 3kW, 50kHz DC-DC converter.",

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N2 - Power transformers are an integral part of an isolated DC-DC converter with a high voltage ratio. An essential requirement of such a transformer design is to achieve a low leakage inductance for power transfer. This paper proposes a transformer design using foil conductors with a half-turn high-current (HC) winding which has the following benefits: 1) less number of turns in both of the HC and low-current (LC) windings in comparison to a conventional design; 2) easy termination of the LC winding; 3) low leakage inductance by virtue of less number of turns and ease of interleaving of the LC and HC windings. The incorporation of half-turn HC windings provides openings through which the LC winding turns can pass. This allows the LC winding turns to be wrapped continuously, resulting in easy interleaving and termination. Analytical design followed by 3-D FEA results and bench top measurements on a hardware prototype are provided for a half-turn-winding transformer designed for a 12-288V, 3kW, 50kHz DC-DC converter.

AB - Power transformers are an integral part of an isolated DC-DC converter with a high voltage ratio. An essential requirement of such a transformer design is to achieve a low leakage inductance for power transfer. This paper proposes a transformer design using foil conductors with a half-turn high-current (HC) winding which has the following benefits: 1) less number of turns in both of the HC and low-current (LC) windings in comparison to a conventional design; 2) easy termination of the LC winding; 3) low leakage inductance by virtue of less number of turns and ease of interleaving of the LC and HC windings. The incorporation of half-turn HC windings provides openings through which the LC winding turns can pass. This allows the LC winding turns to be wrapped continuously, resulting in easy interleaving and termination. Analytical design followed by 3-D FEA results and bench top measurements on a hardware prototype are provided for a half-turn-winding transformer designed for a 12-288V, 3kW, 50kHz DC-DC converter.

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ER -

A half-turn winding for compact, high-current, high-turns-ratio, low-leakage-inductance transformer

Abstract

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Bibliographical note

Keywords

Publisher link

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