DC/DC 컨버터를 이용한 DC Bus 커패시터의 간단한 ESR 측정 기법

• Published in: 전기학회 논문지 P권, 59(4) Vol. 59; no. 4; pp. 372 - 377
• Main Authors: 손진근(Jin-Geun Shon), 김진식(Jin-Sik Kim)
• Format: Journal Article
• Language: Korean
• Published: 대한전기학회 2010
• Subjects: 전기공학; Electrolytic Capacitor; DC/DC Boost Converter; Equivalent Series Resistance(ESR); DC Bus Capacitor
• ISSN: 1229-800X; 2586-7792

Electrolytic capacitors have been widely used in power electronics system because of the features of large capacitance, small size, high-voltage, and low-cost. Electrolytic capacitors, which is most of the time affected by aging effect, plays a very important role for the power electronics system quality and reliability. Therefore it is important to estimate the parameter of an electrolytic capacitor to predict the failure. The estimation of the equivalent series resistance(ESR) is important parameter in life condition monitoring of electrolytic capacitor. This paper proposes a simple technique to measure the ESR of an electrolytic capacitor. This method uses a switching DC/DC boost converter to measure the DC Bus capacitor ESR of power converter. Main advantage of the proposed method is very simple in technique, consumes very little time and requires only simple instruments. Simulation results are shown to verify the performance of the proposed method.