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넓은 출력 전압 범위를 가지는 50kW급 급속충전용 DC-DC 컨버터의 최적 토폴로지 비교 및 선정
김진출(Jin-Chul Kim),박하민(Ha-Min Park),이주(Ju Lee),박진홍(Jin-Hong Park),임태욱(Tae-Uk Im),이재범(Jae-Bum Lee) 대한전기학회 2024 전기학회논문지 Vol.73 No.5
The introduction of high-voltage battery vehicles and the necessity of 400 kW-capacity EV ultra-fast-charging systems emphasize the requirement for DC-DC converters with wide output voltage ranges and high output capabilities Previously, 10 kW DC-DC converters were parallelly expanded to meet fast charging demands, but for 400 kW chargers, this approach necessitates excessive modules, increasing maintenance and complexity in system configuration and control. This paper analyzed DC-DC converter topologies, to establish an optimized design for DC-connected fast charging specifications. It proposes a topology that addresses the shortcomings of existing ones, designed to operate differently secondary side configuration of the converter for varying battery charging voltages. The proposed 50 kW DC-DC converter, when expanded for fast charging, is expected to offer substantial advantages in maintenance and system configuration.
넓은 출력 전압 범위를 가지는 50kW급 급속충전용 DC-DC 컨버터의 최적 토폴로지 비교 및 선정
김진출(Jin-Chul Kim),박하민(Ha-Min Park),이주(Ju Lee),박진홍(Jin-Hong Park),임태욱(Tae-Uk Im),이재범(Jae-Bum Lee) 대한전기학회 2024 전기학회논문지 Vol.73 No.5
The introduction of high-voltage battery vehicles and the necessity of 400 kW-capacity EV ultra-fast-charging systems emphasize the requirement for DC-DC converters with wide output voltage ranges and high output capabilities Previously, 10 kW DC-DC converters were parallelly expanded to meet fast charging demands, but for 400 kW chargers, this approach necessitates excessive modules, increasing maintenance and complexity in system configuration and control. This paper analyzed DC-DC converter topologies, to establish an optimized design for DC-connected fast charging specifications. It proposes a topology that addresses the shortcomings of existing ones, designed to operate differently secondary side configuration of the converter for varying battery charging voltages. The proposed 50 kW DC-DC converter, when expanded for fast charging, is expected to offer substantial advantages in maintenance and system configuration.
철도 분기기의 설빙 방지를 위한 유도방식 히팅 장치의 특성 분석 연구
정거철(Geochul Jeong),지우영(Woo-Young Ji),김진출(Jin-Chul Kim),박찬배(Chan-Bae Park),이재범(Jae-Bum Lee),이주(Ju Lee),이형우(Hyung-Woo Lee) 대한전기학회 2020 전기학회논문지 Vol.69 No.10
In this paper, a study was conducted on an induction type heating device to remove snow and ice that may cause obstacles and malfunctions of the railway switch. In the induction heating device, an ohmic loss is the heat source. Ohmic loss and heat transfer change greatly depending on the shape and material of the heating device and condition of the atmosphere. Since the loss must be accurately calculated to conduct the thermal analysis properly, it is necessary to analyze the electromagnetic and thermal characteristics and to interlock of electromagnetic and thermal analysis. Therefore, the electromagnetic and thermal analysis was conducted using finite element method (FEM). By the performance test of the prototype, verification of the simulation was conducted.