In the pursuit of greener and more sustainable transportation solutions, fuel cell vehicles (FCVs) have widely emerged. The dc-dc converter regulates the variable output voltage of the fuel cell and acts as a key component of FCVs. Hybrid active switched inductor (HASL) dc-dc converters are widely used for FCVs due to their low voltage/current stress on power devices, wide voltage-gain range, simple design, and control. In existing HASL converters, during theoff-mode, the resonance between the drain-to-source capacitor and inductor results in a large voltage across the switches. This article proposes an improved high step-up voltage gain HASL dc-dc converter, eliminating this resonance. The proposed converter is derived by integrating an ASL cell with a switched capacitor cell. During theoff-mode operation of the proposed converter, the voltage across devices is supported with capacitors of a switched capacitor network, mitigating resonance and reducing voltage stress. The operating principles and steady-state analysis of the proposed converter are discussed, and design details are presented. A laboratory prototype of 600 W for voltage step-up from 30 to 330 V is developed and experimentally validated.
Hybrid Active Switched Inductor DC-DC Converter With Common Ground and Suppressed Voltage Oscillation for Fuel Cell Vehicles
IEEE Transactions on Transportation Electrification ; 11 , 1 ; 3204-3214
2025-02-01
2078775 byte
Article (Journal)
Electronic Resource
English
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