Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2018.11a
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- Pages.51-53
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- 2018
A Novel Two-Stage Power Converter suitable for 1MHz-LDC of Electric Vehicles.
전기자동차용 1MHz LDC에 적합한 새로운 2단계 전력변환기
- Tuan, Tran Manh (Department of Electrical Engineering, Soongsil University) ;
- Choi, Woojin (Department of Electrical Engineering, Soongsil University)
- Published : 2018.11.30
Abstract
The Low Voltage DC-DC converters (LDCs) of the Electric Vehicles require high power density and high efficiency operation over the wide range of load and input voltage variations. This paper introduces a novel topology which combines three 1 MHz Half-Bridge (HB) LLC resonant converters and an Inverting Buck-Boost (IBB) converter to adjust the output voltage without frequency modulation. The switching frequency of the proposed converter is fixed at 1MHz to achieve a constant frequency operation for the resonant converter. In the proposed topology GaN FETs and planar transformers are employed to optimize the converter operation at high frequency. A 1 MHz/1.8 kW prototype converter is built to verify the feasibility and the validity of the proposed LDC topology.