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LLC 공진형 하프브릿지 컨버터의 동기정류기 구동회로에 관한 연구
안태영(Tae-Young Ahn),임범선(Bum-Sun Im) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.1
In this paper, we propose a current-driven synchronous rectifier driver circuit for LLC resonant half-bridge converters. The proposed driver circuit detects a relatively low current in the primary side of the transformer although a large current is flowing in the secondary side. Due to this feature, the driver circuit has a simple circuit structure and stabilizes the switching operation with a logic-level switching voltages for the synchronous rectifier. The operation and performance of the proposed driver circuit are confirmed with a prototype of 1kW class LLC resonant half-bridge converter. The experimental results proved that the proposed synchronous rectifier driver method improves the power conversion efficiency by around 1% and reduces the internal power loss by 17W.
역률개선용 스위칭 정류기의 데이터 수집과 저장에 관한 연구
안태영(Tae-Young Ahn),임범선(Bum-Sun Im) 한국조명·전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.2
In this paper, a prototype of power supply with a power factor correction is proposed. As a unique feature the proposed power supply, a status monitoring circuit is embedded on the switching power supply. The status monitoring circuit analyzes the functionality of the system and saves the key components of the power supply in the case of malfunctions. The results of various fault tests are reported to verify the operation and performance of the proposed method. This paper discusses the experimental results of the monitoring module and provides the technical information to monitor, predict, and troubleshoot the system against the potential failure of power supplies for real applications.