Electrical characteristics of high energy density multilayer ceramic capacitor for pulse power application

被引:29
作者
Dai, L [1 ]
Lin, FC [1 ]
Zhu, ZF [1 ]
Li, J [1 ]
机构
[1] Huazhong Univ Sci & Technol, Dept Elect Power Engn, Wuhan 430074, Peoples R China
关键词
electrical characteristics; high energy density; multilayer ceramic capacitors (MLC);
D O I
10.1109/TMAG.2004.839281
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
High energy density capacitor is a very important component to supply energy in pulse power source. Owing to its high dielectric constant (up to 10(5) or more), ceramic material is regarded as a sound dielectric for producing high energy density capacitors. With the energy density under the same order of several hundred J/L, ceramic capacitors can endure higher inverse voltage (> 70%) and have longer life (shot times > 10(6)) compared with metallized film. Multilayer ceramic capacitors (MLC) of low rated voltage have been used for power decoupling and bypass in, telecommunication equipments for many years. In this paper, MCL samples of high voltage have been produced, and their electrical characteristics tested in a pulse energy discharge circuit. From the result, the relations between the changes of capacitance, dielectric loss, the charge frequency, and the lifetime have been deduced. The features in discharge wave are also presented. Some failure mechanisms for these capacitors are put forward in this paper. In conclusion, MLC is suitable for making high energy density capacitor, which can endure high reverse voltage, high current, and possesses long lifetime.
引用
收藏
页码:281 / 284
页数:4
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