Abstract：As the critical power component of fly-back DC/DC converter, excessive leakage inductance of the medium-frequency transformer causes the peak voltage on the switching device which can not be ignored. In addition, in resonant DC/DC converter, the leakage inductance needs to be matched with resonant capacitance and frequency, so that the circuit can reach the ideal working state. So it is very important to calculate the leakage inductance of transformer accurately when designing DC/DC converter. The existing numerical methods for calculating leakage inductance cannot be flexibly applied in transformer design, so analytical methods are widely used. At present, most analytical methods for leakage inductance of round conductor transformer under medium frequency are based on the equivalent method. However, after equivalence, the insulation area of transformer window is larger, and the calculation result of leakage inductance is not accurate enough. In addition, there is an analytical method proposed to directly analyze the frequency effect of round conductor under medium frequency, but the irregular gap between turns is ignored, resulting in inaccurate leakage inductance calculation result. Therefore, a more accurate analytical calculation method of leakage inductance is proposed in this paper, which not only analyzes the frequency effect of the round conductor, but also takes the irregular gap between turns into account, so as to improve the analytical calculation accuracy of leakage inductance. Finally, based on the transformer prototypes, the experiment verified the correctness and effectiveness of the proposed method.
尹浩, 苏建徽, 赖纪东, 于翔, 金陵. 中频圆导线变压器漏感的精确解析计算[J]. 电工技术学报, 2021, 36(15): 3211-3220.
Yin Hao, Su Jianhui, Lai Jidong, Yu Xiang, Jin Ling. Accurate Analytical Calculation of Leakage Inductance of Round Conductor Transformer under the Medium Frequency. Transactions of China Electrotechnical Society, 2021, 36(15): 3211-3220.
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2021, Vol. 36 
