基于辅助绕组的中频变压器绕组交流电阻测量方法

doi:10.19595/j.cnki.1000-6753.tces.180159

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Abstract The measurement of winding AC resistance is important for the copper loss evaluation of medium-frequency transformer (MFT) in the power electronic system. The common method is short-circuit test using impedance analyzer or LCR meter, which can only obtain the total AC resistance of primary and secondary winding. The measurement method to separate the AC resistance of the two winding is presented in this paper. An impedance coupling analytical model of MFT with auxiliary winding is developed, and the effect of coupling coefficient of primary winding between auxiliary winding and secondary winding on measurement results of AC resistance is analyzed. Finally, an online symmetrical coupling auxiliary winding measurement method is developed based on foregoing analytically determined information to significantly increase measurement accuracy. The developed method is applied in a 2kW MFT, where the accuracy of online measured results is validated by Dowell model, finite-element analysis predicted results and standard short-circuit test.

Key words： AC resistance medium frequency transformer auxiliary winding measurement

Received: 28 January 2018 Published: 29 January 2019

PACS:

TM432

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	Articles by authors
	Wang Ruitian
	Xiao Fei
	Zhao Zhihua
	Yang Guorun
	Zhang Xinsheng

Cite this article:

Wang Ruitian,Xiao Fei,Zhao Zhihua等. Investigation on Measurement Method of Transformer Winding AC Resistance by Using Auxiliary Winding[J]. Transactions of China Electrotechnical Society, 2019, 34(2): 245-254.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180159 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I2/245

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