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影响电解电容的外部因素
Edit:管理员 Browse: Times Date:2016-08-17
影响铝电解电容的外部因素
铝电解电容
在电子元器件中是娇贵的存在。为什么这样说呢?因为
铝电解电容
和一般的
电容
相比,
铝电解电容
需要有适应的条件才可以生存,当周围的环境超过了
铝电解电容
的适应范围或者低于
铝电解电容
的适应环境电解电容都将不会工作甚至发生爆炸,漏电流等现象。当我们想更好的使用
电解电容
我们则要注意电解电容的方方面面的问题,在前面的文章中我们有讲解过影响电解电容的寿命的因素有哪些?今天我们就来说一下影响铝电解电容的外部因素有哪些?
外部因素对
铝电解电容
的特性和寿命有较大影响,主要有以下几种情形:
1.频率太高,通过
电容
器的电流I=2πFCV,随所加频率的增加,再加上表层效应,电极的有限面积与频率的平方根成反比,所以若加以超额频率,
电解电容
因过热而导致不良。
2.电压过高,使用电路的电压长期超过该
电容
本身的额定电压,不仅会缩短
电容
的使用寿命,并会有杂音,严重者
电容
会爆炸。
3.高温环境:绝缘电阻变低,易产生击穿或寿命变短,一旦高温,其串联电阻会增大而缩短寿命。
4.高湿度环境:高湿度会使外层绝缘物吸湿而造成绝缘不良或正极引出端子因高湿度与铝壳(作为
电容
负极)相通形成短路。
5.低气压环境:
电容
之静电容量会因气压的高低而变化。
6.电容本身机械压力过大:外加机械压力,电解内压骤增,
电容
内部之电解液外漏,不仅会导致
电容
本体性能劣化,更会使
电容
附近之零部件腐蚀受损。
东莞市祥如电子有限公司
官方网站:
www.xiangrudz.com
如需转载此文请注明文章出处链接:
www.xiangrudz.com
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【Next】
什么是无极性电解电容-东莞祥如专业供应电解电容
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