전기자동차 충전을 위한 고효율 파워모듈 개발 (Development of High Efficiency Power Module for Electric Vehicle Charger)

서지정보

· 발행기관 : 한국자동차공학회
· 수록지 정보 : 한국자동차공학회 논문집 / 30권 / 10호 / 785 ~ 792페이지
· 저자명 : 박준성, 전유종, 나재호, 조수연, 신양진, 신외경, 김준호

초록

This paper proposes a high-efficiency power module for electric vehicle fast charger application. The power module consists of a three-phase vienna rectifier and an isolated LLC resonant converter designed to achieve high efficiency at peak current when the battery voltage is from 150 V to 1000 V, which is the commercially fast charging requirement for 400 V and 800 V batteries. The DC-link voltage control of PFC as well as duty adjustment, frequency control, and half/full-bridge switching of LLC resonant converter are proposed to cover a wide battery voltage range. A 20 kW prototype of the proposed power module is built and tested to verify performance. The peak efficiency of one power module was 96.5 %, which was measured 2 %p higher than that of the Infypower’s 20 kW power module. In order to verify the proposed constant current control and pre-charging sequence, the effectiveness of the parallel-connected power modules was also validated on an 80 kW prototype. Owing to identical hardware and software in each power module, the proposed power module can easily expand the power up to 400 kW for ultra-fast charging.

영어초록

This paper proposes a high-efficiency power module for electric vehicle fast charger application. The power module consists of a three-phase vienna rectifier and an isolated LLC resonant converter designed to achieve high efficiency at peak current when the battery voltage is from 150 V to 1000 V, which is the commercially fast charging requirement for 400 V and 800 V batteries. The DC-link voltage control of PFC as well as duty adjustment, frequency control, and half/full-bridge switching of LLC resonant converter are proposed to cover a wide battery voltage range. A 20 kW prototype of the proposed power module is built and tested to verify performance. The peak efficiency of one power module was 96.5 %, which was measured 2 %p higher than that of the Infypower’s 20 kW power module. In order to verify the proposed constant current control and pre-charging sequence, the effectiveness of the parallel-connected power modules was also validated on an 80 kW prototype. Owing to identical hardware and software in each power module, the proposed power module can easily expand the power up to 400 kW for ultra-fast charging.

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