用作变频器与逆变器的整流滤波电容器的薄膜电容器  

Film Capacitor Used as Smoothing Capacitor of CVCF and Inverter

作　　者：陈永真[1] 

机构地区：[1]辽宁工业大学,锦州121001

出　　处：《电源世界》2008年第2期68-70,共3页The World of Power Supply

摘　　要：作为变频器/逆变器的整流滤波电容器,通常认为其最主要的参数是额定电压、电容量,一般采用电解电容器作为整流滤波电容器。但是在实际应用中却因为过大的纹波电流在滤波电解电容器的ESR产生热,从而使滤波电容器的寿命大大减少。针对这个问题,本文介绍并分析了采用薄膜电容器作为变频器/逆变器的整流滤波电容器的特点与应用。事实表明,采用薄膜电容器作为变频器/逆变器整流滤波电容器可以大大提高变频器/逆变器的使用寿命。Rating voltage and rating capacitance are generally believed as the main parameters of the smoothing capacitor of CVCF and inverter, electrolyte capacitor is usually used as smoothing capacitor. But the using life of the smoothing capacitor is greatly reduced because of the heat generated by the excessive ripple current on the ESR of the smoothing electrolyte capacitor. To this problem,characteristics and application of pellicle capacitor used as smoothing capacitor of CVCF and inverter are introduced and analyzed. Realities show that, the using life of the transducer and adverse converter will be greatly heightened by using film capacitor as CVCF and inverter capacitor.

关 键 词：薄膜电容器 ESR 纹波电流 寿命 

分 类 号：TM92[电气工程—电力电子与电力传动]