Analysis and Design of Extended Range Zero Voltage Switching (ZVS) Active-Clamping Current-Fed Push–Pull Converter

2020 ◽  
pp. 45-54
Author(s):  
Koyelia Khatun ◽  
Akshay Kumar Rathore
Keyword(s):  
Zero Voltage Switching ◽  
Analysis And Design ◽  
Extended Range ◽  
Zero Voltage ◽  
Voltage Switching

Study of an Isolated DC-DC Converter for Fuel Cell Applications

2016 ◽  
Vol 839 ◽  
pp. 65-69
Author(s):  
Sakda Somkun ◽  
Shanmugham Prabhuraj ◽  
Chatchai Sirisamphanwong
Keyword(s):  
Fuel Cell ◽  
Output Voltage ◽  
High Efficiency ◽  
Load Range ◽  
Zero Voltage Switching ◽  
Analysis And Design ◽  
Switching Regimes ◽  
Light Load ◽  
Zero Voltage ◽  
Voltage Switching

This paper presents the analysis and design of a dual active bridge DC-DC converter for fuel cell applications. The zero voltage switching operating condition of such converter is analyzed to select an appropriate turn ratio of the high frequency transformer for a high efficiency operation. The ratio between the output voltage to the fuel cell voltage should be close to the transformer turn ratio to guarantee the zero voltage switching regimes at a light load. The prototype converter was designed to be suitable for the input voltage of 40 to 65 V and output voltage of 360 to 400 V with the transformer turn ratio of 7.33. The converter was tested with a 48 V DC power supply and with a polymer electrolyte membrane fuel cell stack. The maximum power of 700 W was delivered and the efficiency was better than 94% for the whole load range.

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