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http://dx.doi.org/10.5370/KIEEP.2014.63.4.345

Failure Prediction Monitoring of DC Electrolytic Capacitors in Half-bridge Boost Converter  

Seo, Jang-Soo (송원대학교 전기전자공학과)
Shon, Jin-Geun (가천대학교 전기공학과)
Jeon, Hee-Jong (숭실대학교 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.63, no.4, 2014 , pp. 345-350 More about this Journal
Abstract
DC electrolytic capacitor is widely used in the power converter including PWM inverter, switching power supply and PFC Boost converter system because of its large capacitance, small size and low cost. In this paper, basic characteristics of DC electrolytic capacitor vs. frequency is presented and the real-time estimation scheme of ESR and capacitance based on the bandpass filtering is adopted to the single phase boost converter of uninterruptible power supply to diagnose its split dc-link capacitors. The feasibility of this real-time failure prediction monitoring system is verified by the computer simulation of the 5[kW] singe phase PFC half-bridge boost converter.
Keywords
Electrolytic capacitor; ESR(equivalent series resistance); Failure prediction monitoring; Half-bridge boost converter; PFC(power factor correction);
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