一种兼顾效率和电磁兼容的反激变压器设计

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Abstract Sandwich winding is often used to reduce the transformer losses because of increasing the coupling coefficient transformer between primary winding and secondary winding and reducing the leakage inductance. But it tends to worsen common-mode electromagnetic interference. This paper analyzes the common-mode electromagnetic interference characteristics of the transformer by changing the height of Shield and the location of grounding point based on the model of induced charge in the secondary side. Sandwich winding is used, while using some shielding and adjusting spacing between shield and the secondary winding to improve transformer common-mode electromagnetic interference characteristics are proposed. By means of optimization design of common-mode electromagnetic interference and efficiency of the Fly-back transformer, the prototype is manufactured and tests are carried. The results show that the efficiency is improved by 2.31%, and common-mode electromagnetic interference is reduced by 15 dB. Finally, the model is verified with experimental results.

Key words： fly-back transformer efficiency common-mode electromagnetic interference optimization design

Published: 28 October 2015

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	Articles by authors
	Zeng Zhiqiang
	Zheng Xincheng
	Chen Wei

Cite this article:

Zeng Zhiqiang,Zheng Xincheng,Chen Wei. The Balanced of Efficiency and Electromagnetic Compatibility for Fly-back Transformer Design[J]. Electrical Engineering, 2015, 16(10): 8-12.

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http://dqjs.cesmedia.cn/EN/Y2015/V16/I10/8

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