| Title |
Comparison and Analysis of Control Strategies to Achieve High Efficiency for Cascaded Boost Converter in Fuel Cell Electric Vehicle |
| Authors |
김현석(Hyun-Seok Kim) ; 이상민(Sang-Min Lee) ; 김현수(Hyeon-Soo Kim) ; 황윤성(Yun-Seong Hwang) ; 이병국(Byoung-Kuk Lee) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.3.552 |
| Keywords |
Fuel cell electric vehicle; High voltage gain converter; Cascaded boost converter |
| Abstract |
In fuel cell electric vehicles (FCEVs), the fuel cell DC?DC converter (FDC) boosts the voltage of the FC stack to the DC-link voltage required by the inverter. To reduce the volume of the FC source by lowering the FC stack voltage, a topology that can achieve higher voltage gain than conventional boost converter is required. Therefore, a cascaded boost converter (CBC) which has a large voltage gain can be adopted. Given that the CBC can apply various control method, a quantitative analysis under each control method is required to determine high-efficiency operation. Therefore, this paper analyzes and compares three control methods for CBC to determine the optimal control strategies considering FC voltage and current. A 55kW multi?phase interleaved CBC is designed considering volume, efficiency, and temperature of power devices. Furthermore, theoretical loss and efficiency analyses are performed and validate the proposed control strategy’s effectiveness through experiments results. |