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铝电解电容与固态电容选用常识
Edit:管理员 Browse: Times Date:2016-09-05
铝电解电容与固态电容选用常识
铝电解电容
的容体比较大,串联电阻较大,感抗较大,感抗较大,对温度敏感。它适用与温度变化不大、工作频率不高(不高于25KHz)的场合,可用于低频滤波(在高频率的时候电解
电容
的并联滤波效果较低频差)。
铝电解电容
具有极性,安装时必须保证正确的极性,否则有爆炸的危险。
与铝电解
电容
相比,固态
电容
在串联
电阻
、感抗、对温度的稳定性等方面都有明显的优势。但是,它的工作电压较低。
铝
电解电容
器的额定电压的1.3倍作为
电容
器的浪涌电压,工作电压高于160V时,是额定工作电压+50V作为浪涌电压。可以允许在短时间内承受此电压。
电容
器处于浪涌电压时,电流会很大,通常是正常情况下的10-15倍,如果时间太长,会爆开。所以一般选用铝
电解电容
器应该把电压选的稍高些,实际工作电压为标称电压的70-80%为宜。
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