The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Proposal of the Energy Recovery Circuit for Testing High-Voltage MLCC

고전압 MLCC 시험을 위한 에너지 회수 회로 제안

  • Kong, So-Jeong (Dept. of Electrical Engineering, Myongji University) ;
  • Kwon, Jae-Hyun (Dept. of Electrical Engineering, Myongji University) ;
  • Hong, Dae-Young (Dept. of Electrical Engineering, Myongji University) ;
  • Ha, Min-Woo (Dept. of Electrical Engineering, Myongji University) ;
  • Lee, Jun-Young (Dept. of Electrical Engineering, Myongji University)
  • Received : 2021.10.11
  • Accepted : 2022.01.08
  • Published : 2022.06.20
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Abstract

This paper proposes a test device designed for developing a high-voltage multilayer ceramic capacitor (MLCC). The proposed topology consists of an energy recovery circuit for charging/discharging capacitor, a flyback converter, and a boost converter for supplying power and a bias voltage application to the energy recovery circuit. The energy recovery circuit designed with a half-bridge converter has auxiliary switches operating before the main switches to prevent excessive current from flowing to the main switches. A prototype has been designed to verify the reliability of target capacitors following the voltage fluctuation with a frequency range below 65 kHz. To conduct high root mean square (RMS) current to the capacitor as a load, the MLCC test was conducted after the topology verification was completed through the film capacitor as a load. Through the agreement between the RMS current formula proposed in this paper and the MLCC test results, the possibility of its use was demonstrated for high-voltage MLCC development in the future.

Keywords

Acknowledgement

본 연구는 한국산업기술평가관리원의 "국가연구개발산업(전기자동차용 630V급 고용량 MLCC 소재 및 부품 개발)"의 연구비 지원을 받아 수행된 연구임. (No.20010938)

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