Characterization of power capacitors under practical current condition using capacitor loss analyzer

摘要

In this study, the characteristics of capacitor are measured by using the function of B-H analyzer. In contrast to impedance analyzer measurement, the B-H analyzer can be used to measure capacitor characteristics under high current amplitude condition that approaches the practical current condition. In addition, the rectangular current waveform of a capacitor can also be measured under variable frequency and current conditions. Furthermore, loss evaluation of capacitor can be calculated through loss map method. The characteristics of three different dielectric capacitors - electrolytic, ceramic, and film - measured with sinusoidal and rectangular current waveforms, respectively, and discussed.