高储能密度陶瓷电容器的性能
Performance of high energy density ceramic capacitor
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摘要: 根据陶瓷介质材料具有高介电常数和高工作场强的特性，从理论上分析了陶瓷电容器具有的储能密度高、可工作在数kHz至数MHz的振荡放电回路中和老化缓慢等特性。对试制的1μF/500V的多层陶瓷电容器（MLC）试样品进行了750V 的1min直流耐压和100Hz重复充放电等可靠性试验研究，结果表明：该MLC在500V工作电压下（对应的体积储能密度达到720J/L）重复充放电寿命达107次以上；50kHz振荡放电输出电流峰值达320A；试验前后电气性能保持不变。因此，这种陶瓷电容器适合用作强脉冲大功率电源的储能元件。Abstract: Ceramic dielectric material is characterized of high dielectric constant and high working electric field. According to the excellent performance of the ceramic, this paper theoretically analyzes the capacitors made from such materials, which can work in oscillated discharging circuit in the frequency from some kHz to several MHz with slow-aging．The reliability of high energy density multilayer ceramic capacitor （MLC）has been studied by the 1μF/500V species with DC voltage withstanding 750V 1min test and repeated chargedischarge in the frequency of 100Hz. The results show that under the operating voltage of 500V(the energy density reachs 720J/L), the MLC has long lifetime over 107 shot times and large output peak current of 320A in the frequency of 50kHz, and steady electric perfo
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Key words:
- multi-layer ceramic capacitor /
- high energy density /
- frequency /
- aging /
- reliability
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