Analysis of Operation Mode and Output Ripple Voltage of Interleaved-Ccontrol Double-Input Buck Converters[J]. 2021, 55(8): 139-149.
DOI:
Analysis of Operation Mode and Output Ripple Voltage of Interleaved-Ccontrol Double-Input Buck Converters[J]. 2021, 55(8): 139-149.DOI: 10.7652/xjtuxb202108017.
Analysis of Operation Mode and Output Ripple Voltage of Interleaved-Ccontrol Double-Input Buck Converters
In order to solve the problem of complex operation mode and difficult parameter design of the interleaved-control double-input Buck converter due to the difference of the two input voltages
three cases of the two input voltages of the converter are analyzed and discussed. Mathematical models of critical load
inductance current and output ripple voltage of the converter operating in continuous conduction mode(CCM)and discontinuous conduction mode(DCM)are established. It is found that the critical load of the converter increases as the difference between the two input voltages decreases
and the inductor current ripple and output ripple voltages decrease as the voltage difference between the two input voltages decreases. When the two input voltages are equal
the critical load of the converter reaches the maximum
and the inductor current ripple and output ripple voltages reach the minimum. Finally
an experimental platform for double-input Buck converter is built
and three groups of different input voltages are given for experimental study. The experimental results verify the correctness of the operation mode of the converter and the mathematical models of the output ripple voltage. The research results provide a theoretical basis for the parameter optimization design of the double-input Buck converter with interleaved control.
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