The present invention relates to a capacitor discharging circuit device of an electric power system for an eco-friendly vehicle. A main objective of the present invention is to provide a capacitor discharging circuit device of an electric power system for an eco-friendly vehicle which improves a problem of conduction loss by a discharge resistor even in a normal situation such as driving a vehicle and charging a battery if the discharge resistor is arranged in parallel with a link capacitor on a DC link end connecting a gap between a power source and a power module in an inverter. To achieve the objective, the capacitor discharging circuit device of an electric power system for an eco-friendly vehicle comprises: a DC link capacitor installed on a DC link connecting a gap between a power source and a power module in a power conversion device; a discharge resistor installed on the DC link to be connected in parallel with the DC link capacitor; a circuit switching element installed on the DC link to be connected in series with the discharge resistor; and a control unit to control a switching operation of the circuit switching element.
본 발명은 친환경자동차용 전기동력시스템의 커패시터 방전회로장치에 관한 것으로서, 전원과 인버터 내 파워 모듈 사이를 연결하는 DC 링크단에 링크 커패시터와 병렬로 방전저항을 구성할 경우 차량 운행 및 배터리 충전 등과 같은 정상적인 상황에서도 방전저항에 의한 전도 손실이 발생하는 문제점을 개선한 친환경자동차용 전기동력시스템의 커패시터 방전회로장치를 제공하는데 주된 목적이 있는 것이다. 상기한 목적을 달성하기 위해, 전원과 전력변환장치 내 파워 모듈 사이를 연결하는 DC 링크에 설치되는 DC 링크 커패시터; 상기 DC 링크 커패시터와 병렬로 연결되도록 DC 링크에 설치되는 방전저항; 상기 방전저항과 직렬로 연결되도록 DC 링크에 설치되는 회로개폐소자; 및 상기 회로개폐소자의 개폐동작을 제어하는 제어부;를 포함하는 친환경자동차용 전기동력시스템의 방전회로장치가 개시된다.
Active capacitor discharge system of electric power system for eco-friendly vehicle
친환경자동차용 전기동력시스템의 능동형 커패시터 방전회로장치
23.11.2016
Patent
Elektronische Ressource
Koreanisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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