Novel Bidirectional Snubberless Naturally Commutated Soft-Switching Current-Fed Full-Bridge Isolated DC/DC Converter for Fuel Cell Vehicles

2014 ◽  
Vol 61 (5) ◽  
pp. 2307-2315 ◽  
Author(s):  
Pan Xuewei ◽  
Akshay K. Rathore
Keyword(s):  
Fuel Cell ◽  
Soft Switching ◽  
Fuel Cell Vehicles ◽  
Switching Current

scholarly journals Performance of Isolated Soft Switching Current Fed Lcc-T Resonant Dc-Dc Converter for Pv/Fuel Cell Applications

2020 ◽  
Vol 10 (1) ◽  
pp. 1-4
Keyword(s):  
Fuel Cell ◽  
High Harmonic ◽  
Soft Switching ◽  
Voltage Transformer ◽  
Constant Frequency ◽  
Zero Voltage Switching ◽  
Switching Current ◽  
Load Demand ◽  
Zero Current Switching ◽  
Zero Current

In this paper, the design and evaluation of isolated soft switching current LCC-T Resonant DC-DC Converter for PV/Fuel cell applications. For the front end inverter switches, zero voltage switching (ZVS) is used for conversion. For voltage double diodes, Zero-Current Switching (ZCS) is used. Earlier, DC-DC converter provides high harmonic currents, so to overcome that, proposed converter is introduced. The proposed converter will improve the content of harmonic current based on the input variations and wide load. To get the required output voltage, transformer ration will be reduced. Because of the, for PV/ Fuel cell applications have better foot Print and high potential. The proposed converter operates in two modes mainly; they are constant frequency mode and constant duty cycle mode. These modes mainly depend on the load demand. At last from results it can observe that gives satisfying proposed theory.

High Power Soft Switching Current Buck DC-DC Converter for Fuel Cell Electrical Vehicles

2013 ◽  
Vol 365-366 ◽  
pp. 494-497
Author(s):  
Dian Long Wang ◽  
Zhi Yang Zhang ◽  
Yan Gang Li
Keyword(s):  
Fuel Cell ◽  
Electric Vehicles ◽  
Clean Energy ◽  
Soft Switching ◽  
Working Process ◽  
Circuit Topology ◽  
Switching Current ◽  
Electrical Vehicles ◽  
Fuel Cell Electric Vehicles ◽  
Diode Current

Fuel cell electric vehicles (FCEV) are emerging clean energy vehicles. A new soft switching current buck DC/DC circuit topology for FCEV was proposed. The characteristics and working process of the circuit topology were analyzed. By appending inductor, capacitor, diode in basic buck circuit, the converters main power switch and diode current were working in soft switching status, and the converters EMC and reliability were improved greatly. The circuit was simulated with Orcad software and its switch waveform, efficiency curve of 90kW DC/DC converter developed based on the topology was given. The converter has been used in the domestic fuel cell city buses successfully and proved to operate with reliability.

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