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

The Korean Institute of Power Electronics (전력전자학회)
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High Efficiency Bridgeless Power Factor Correction Converter With Improved Common Mode Noise Characteristics

우수한 공통 모드 노이즈 특성을 가진 브릿지 다이오드가 없는 고효율 PFC 컨버터

  • Received : 2021.10.07
  • Accepted : 2021.11.15
  • Published : 2022.04.20
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Abstract

This study proposes a high efficiency bridgeless Power Factor Correction (PFC) converter with improved common mode noise characteristics. Conventional PFC has limitations due to low efficiency and enlarged heat sink from considerable conduction loss of bridge diode. By applying a Common Mode (CM) coupled inductor, the proposed bridgeless PFC converter generates less conduction loss as only a small magnetizing current of the CM coupled inductor flows through the input diode, thereby reducing or removing heat sink. The input diode is alternately conducted every half cycle of 60 Hz AC input voltage while a negative node of AC input voltage is always connected to the ground, thus improving common mode noise characteristics. With the aim to improve switching loss and reverse recovery of output diode, the proposed circuit employs Critical Conduction Mode (CrM) operation and it features a simple Zero Current Detection (ZCD) circuit for the CrM. In addition, the input current sensing is possible with the shunt resistor instead of the expensive current sensor. Experimental results through 480 W prototype are presented to verify the validity of the proposed circuit.

Keywords

Acknowledgement

본 연구는 삼성전자의 지원을 받아 수행한 결과임. 이 논문은 2021년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임. (20212020800020, 통합형 최적설계 플랫폼 기반 초고효율 전력변환시스템 개발)

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