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| Comprehensive Parameter Design Method of Interleaved Boost Converter for Fuel Cell Applications |
| Ma Xiaoyong1, Wang Yifeng1, Wang Ping1, Meng Zhun2 |
1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China;
2. State Grid Tianjin Economic Research Institute Tianjin 300171 China |
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Abstract Taking the interleaved boost converter for fuel cell as the research target, a comprehensive parameter design method is proposed considering efficiency and power density. Firstly, the voltage and current ripple are compared in single-branch and multi-branch interleaved operation. Ripple suppression ratio is introduced to quantify the effect of interleaved structure, thereby establishing the relationship between the ripple requirement and parameters of the single branch, and consequently the parameter design is carried out. During the process of comprehensive design, the switching frequency fs, the inductor current ripple ΔIL and the radius of inductor core r are chosen as independent variables to establish the power loss and passive device volume model. Power loss less than the set value is set as the constraint condition, the minimum volume of passive components is the design object, the optimal independent variables are chosen. Then, the optimal value of the capacitor and the design of the inductor are carried out, and the comprehensive design considering efficiency and power density is achieved. Finally, the correctness of theoretical analysis and the feasibility of the parameter design method are verified via the simulation and a 40kW prototype.
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Received: 09 July 2020
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2022, Vol. 37 
