基于Q3D的Buck TL变换器杂散电感提取方法研究

摘要

Buck TL变换器中由于回路中杂散电感的存在使得功率器件的电压尖峰问题越来越突出.对Buck TL变换器中续流二极管电压尖峰产生的原因进行分析,从而得到引起其电压尖峰产生的高频电流路径.同时结合Q3D软件对该路径中的杂散电感进行提取,对比通过软件和实验提取的电感值来验证仿真计算的准确性.实验结果表明,所提基于Q3D的杂散电感提取方法具有较高的准确性,可较好地应用于工程中.%As for the existence of the stray inductance in the Buck TL convertor,the voltage spike problems becomes more and more serious.The cause of voltage spike of free-wheeling diode is analyzed and the high-frequency current path can be acquired.The stray inductances are extracted by Q3D and experiment.Experimental results indicate that the stray inductance extraction by Q3D is precise and can be applied to the project well.