Compensation of leakage flux on insulated core flat winding transformer
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摘要: 针对绝缘磁芯平面变压器因绝缘膜而产生的漏磁问题，提出了在每层次级线圈的两端并联补偿电容的解决方法。通过理论分析给出了补偿电容大小的推导公式，利用CST和Protel对搭建的绝缘磁芯平面变压器的仿真计算发现，引入补偿电容后，变压器总的输出电压提高了约17.6%，同时各层次级线圈输出电压的大小基本相同。仿真结果与实验结果一致，从而验证了并联补偿电容方法的有效性。Abstract: Solid insulating materials may increase the leakage flux of insulated core flat winding transformer(ICFWT). This results in a low generated voltage in the secondary coils, especially on the upper stages. Parallelly connecting an appropriate compensation capacitor to the secondary coil on every stage will cancel the flux loss. Design equations to calculate the value of flux compensation capacitors and relevant simulations by CST and Protel are presented. Simulation results of an actual ICFWT show that the output voltage increases by 17.6% with compensation. At the same time, every stage generates almost the same voltage. Simulation results are consistent with the results of subsequent experimental tests, which again confirms the effectiveness of flux compensation capacitors.
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