推挽变换器的变压器线圈损耗建模及其应用  

Winding Loss Modeling and Application for Push-Pull Transformer

作　　者：毛行奎[1] 黄从愿[1] 陈为[1] 

机构地区：[1]福州大学电气工程与自动化学院,福州350108

出　　处：《磁性元件与电源》2012年第11期136-140,共5页Components and Power

摘　　要：由于四个线圈分时工作，应用于推挽变换器的变压器线圈交流损耗模型与线圈同时工作的高频功率变压器有很大不同。通过深入研究线圈电流谐波磁势平衡特点，提出将一个四线圈分时工作的推挽变压器等效为两个独立的变压器，分别建立这两个变压器的谐波电流损耗模型，从而获得整个变压器的线圈损耗建模方法，并据此提出通过这两个等效变压器测量推挽变压器线圈奇、偶次谐波电流的交流电阻的测量方法。一个400W的平面变压器优化设计验证了线圈损耗模型和交流电阻测量方法的正确性，新模型可以很方便用于优选和设计推挽变压器。Because of its four windings operating time-sharing, AC winding model of push-pull transformer is different from the model of high-frequency power transformer with windings operating simultaneously. By the deep research on the MMF balance characteristics of the windings harmonic excitation currents, the new winding loss model was built for push pull transformer. Base on the analysis, the total winding loss can be considered as the sum of the winding loss of two non-tapped Forward-type transformers with respect to the related harmonic excitations. Based on this model, AC winding resistance measuring schemes for each harmonic were developed. The new model was verified by a 400W planar transformer optimal design and can be used to design the high-performance push pull transformer conveniently.

关 键 词：涡流损耗 线圈技术 平面变压器 

分 类 号：TM4[电气工程—电器]