大功率高频变换器滤波电容问题研究

Study on Issues of the Filter Capacitor in High-power High-frequency Converter

滤波电容器是大功率高频变换装置中的重要环节。结合实际应用,分析了滤波电容在变换器中的工作状态。研究发现,在高频应用场合,滤波电容温升及寿命问题是决定装置可靠性的主要因素之一。针对这两个容易被忽视的问题,提出了解决方法,并在实用装置上进行了验证。

The filter capacitor is an important part in high-power, high-frequency converter.With practical applying ,working conditions of the filter capacitor in converter are analyzed.h is found after study that,at high-frequency situation,issues of temperature rise and life-span in filter capacitor are one of the key factors which determines the reliability of the converter,and it is easy to be ignored.Ways are also put forward to solve these issues and validation is demonstrated on the practical converter.