벅 컨버터의 새로운 고장전류 고속차단 기법New Fault Current Fast Shutdown Scheme for Buck Converter
New Fault Current Fast Shutdown Scheme for Buck Converter
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초록
벅 컨버터는 전압 직류 계통(LVDC), 가전 분야 및 전기차 충방전 분야에서 다양하게 적용되고 있는 전력변환장치이며, 일반적으로 벅 컨버터는 부하측에 단락 등 고장 발생시 반도체 스위칭 소자를 개방시켜 벅 컨버터의 운전을 중지시킨다. 그러나 벅 컨버터의 출력단에 인덕터와 캐패시터에 저장된 에너지로 인해 고장 전류가 지속적으로 부하로 전달되는 문제점을 가지고 있다. 본 논문에서는 벅 컨버터의 출력측 저역통과 필터에 일반적인 인덕터 대신 커플드 인덕터(Coupled-inductor)를사용하여 인덕터에 저장된 전기에너지를 부하단에 공급되지 않도록 소모시키는 구성을 포함하는 벅 컨버터의 새로운 고장전류 고속차단 방식을 제안하며, 제안된 방식은 시뮬레이션을 통해 성능을 검증하였다.
Abstract
This paper presents a novel fast shut-down scheme for Buck converter by using a coupled inductor. Generally, acontroller for Buck converter stops generating PWM patterns in various fault cases: Overcurrent, Short circuit, orOvervoltage, but the inductor and capacitor keep supplying their stored energy to loads although the switching operationsin Buck converter stopped. The stored energy in the inductor and capacitor could cause electrical stresses on breakersand safety problems. The main idea of the proposed fast shutdown scheme is to demagnetize the inductor core by usinga coupled inductor, and its performance and operations are verified by using PSIM Simulation.
참고문헌 (12)
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