SU Donglin, ZHU Kaixiang, XU Hui, PENG Zhenzhen, YANG Shunchuan, LIU Yan. An Accurate and Efficient Approach for High-Frequency Transformer Parameter Extraction[J]. Chinese Journal of Electronics, 2019, 28(5): 1059-1065. doi: 10.1049/cje.2019.06.008
Citation: SU Donglin, ZHU Kaixiang, XU Hui, PENG Zhenzhen, YANG Shunchuan, LIU Yan. An Accurate and Efficient Approach for High-Frequency Transformer Parameter Extraction[J]. Chinese Journal of Electronics, 2019, 28(5): 1059-1065. doi: 10.1049/cje.2019.06.008

An Accurate and Efficient Approach for High-Frequency Transformer Parameter Extraction

doi: 10.1049/cje.2019.06.008
Funds:  This work is supported by the National Natural Science Foundation of China(No.61427803).
  • Received Date: 2019-06-17
  • Rev Recd Date: 2019-07-04
  • Publish Date: 2019-09-10
  • Accurate parasitic parameter extraction of high-frequency transformers is one of the key techniques to efficiently design a Switched-mode power supply(SMPS). An approach to accurately and efficiently extract the parasitic parameters of high-frequency transformers is proposed. The high-frequency transformer is first decomposed into first-order RL and second-order RLC circuits according to inherent step response characteristics. Through the measured discharging pulse and damped oscillation responses of the high-frequency transformer excited by a square wave, we can extract the equivalent circuit parameters through fitting the responses with Particle swarm optimization(PSO). The equivalent circuits of the high-frequency transformer with the desired parameters are obtained for the SMPS design. We validate the effectiveness and accuracy of the proposed method with simulations and measurements.
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