摘要
随着单端反激变换器在高频高压场合的应用,变压器寄生参数的控制对电路的正常运行以及性能优化尤为关键。文中对变压器分布电容对电路的影响进行了透彻分析,给出了一般性的模型,并以高输入电压低输出电压场合为例,对该模型进行了等效处理,继而详细分析了分布电容对电路工作产生的影响,归纳出有意义的结论,并基于以上研究,提出控制寄生参数的工程方法,并通过实验验证了文中分析的正确性及抑制方法的实用性。
High-frequency operation of flyback, converter has made it clear that parasitic components associated with power transformer have great influences in the behavior of the converter. Leakage inductance and stray capacitance are two major parasitic components. But the latter has received little attention in designing transformer. Winding capacitance olavs more imoortant role in the real working of the high-voltage converters and should be taken into consideration. First,a relative simplified transformer model is given through comparison of existing models. And for different applications, this basic model is further simplified for convenience in the engineering analysis. Then for high input voltage and low output voltage applications, effects of parasitic winding capacitance on the operations of high-voltage, high-frequency flyback converter are analyzed with design guidelines deduced. At last, some experimental results are given, which verify the correctness of analysis and practicability of proposed suppression method.
出处
《电工电能新技术》
CSCD
北大核心
2006年第4期67-70,75,共5页
Advanced Technology of Electrical Engineering and Energy
关键词
分布电容
反激变换器
高频高压
斜坡补偿
stray capacitance
flyback converter
high-frequency high-,ohage
slope compensation
