Novel bidirectional snubberless soft-switching naturally clamped zero current commutated current-fed dual active bridge (CFDAB) converter for fuel cell vehicles

2013 ◽  
Author(s):  
Pan Xuewei ◽  
Akshay K. Rathore
Keyword(s):  
Fuel Cell ◽  
Soft Switching ◽  
Fuel Cell Vehicles ◽  
Dual Active Bridge ◽  
Zero 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.

scholarly journals Operation of Current-fed Dual Active Bridge DC-DC Converters for Microgrid

2019 ◽  
Vol 8 (2) ◽  
pp. 3167-3175
Keyword(s):  
High Frequency ◽  
Soft Switching ◽  
Switching Loss ◽  
Zero Voltage Switching ◽  
Dual Active Bridge ◽  
Light Load ◽  
Zero Current Switching ◽  
Zero Current ◽  
Cell Energy ◽  
Load Conditions

Dual Active Bridge (DAB) is an isolated bidirectional DC-DC converter, which comprises two full bridge converterslinked through a high frequency transformer. It haslow stresses and permits high frequency performance because of the soft-switching. All the switches in the converter achieves the turn ON & OFF during Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) to minimize switching loss. Generally, DAB is classified as two types, namely, voltage-fed and current-fed variants. At light load conditions, soft-switching is not realized in case of voltage-fed DAB topologies. The application of current-fed DAB converters is to reduce the losses at the time of switching under light load conditions and improves the efficiency. This paper describes the various topologies of voltage-fed and current-fed DAB used for different applications in microgrid and fuel cell energy generation system by using the simulation. The performance of voltage-fed and current-fed DAB with snubber-less converters are also demonstrated and their effectiveness are validated

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