电解电容器和薄膜电容器被称为“自我修复"电解电容器的介电层中的缺陷通过阳极氧化修复,从电解质中消耗氧气。 然而,薄膜电容器中的缺陷被烧毁并因此电隔离,但是每个烧损缺陷导致介电薄膜的小损失,即电容的小的减小。
Electrolytic capacitors and thin-film capacitors are called "self-healing": defects in the dielectric layer of electrolytic capacitors are repaired by anodic oxidation, which consumes oxygen from the electrolyte. However, the defects in the film capacitor are burned out and thus electrically isolated, but each burn defect leads to a small loss of the dielectric film, that is, a small reduction of the capacitance.
鉴于在规范限制内的操作条件,两种技术都显示出“优雅”的寿命终止行为,其主要特征是参数而非灾难性故障。工作参数温度,电压和纹波电流决定了电解电容器的寿命。
Both technologies exhibit "elegant" end-of-life behavior due to operating conditions within specification limits, characterized by parameters rather than catastrophic failures. The working parameters, temperature, voltage and ripple current determine the life of electrolytic capacitor.
使用铝电解电容器存储给定量能量的具体成本明显低于薄膜电容器大约三倍。 另一方面,薄膜电容器的优异载流能力在每安培成本方面优于电解电容器大约两倍。
The specific cost of using aluminum electrolytic capacitor to store quantitative energy is about three times lower than that of thin film capacitor. On the other hand, the excellent current carrying capacity of the thin film capacitor is about twice that of the electrolytic capacitor in terms of the cost per ampere.
对于薄膜电容器,温度,电压和湿度限制了使用寿命。
For thin film capacitors, temperature, voltage and humidity limit their service life.
纹波电流对寿命的影响不会进入等式,因为薄膜电容器中特别低的ESR值导致的自发热可忽略不计。
The effect of ripple current on the lifetime will not enter the equation because the self heating caused by the extremely low ESR value in the thin film capacitor is negligible.
ESR的典型寿命终止更改限制是两种技术的初始ESR值的两倍或三倍。
The typical end of life change limit for ESR is two or three times the initial ESR value for both technologies.
薄膜电容使用寿命结束时常见的电容损耗为3%,铝电解电容为30%。
At the end of its service life, the common capacitance loss is 3% and that of aluminum electrolytic capacitor is 30%.