| In this paper, the basic principle of Buck converter and two-phase interleaving Buck converter was introduced. The theoretical analysis of working mode was carried out based on its mathematical model.Buck converter topology and the basic situation in the current under the same load, the converter output current ripple is smaller, reducing the output voltage ripple, at the same time, current through the switch and diode for half of the total output current, reduce the current switch and diode of the stress, the staggered parallel technology, the frequency of the output voltage is two times the basic converter output voltage and frequency, so that the output filter capacitor. So it has advantages of ripple cancellation, current sharing between the phases etc. A control schematic based on the PID voltage feedback control circuit was designed and its working principle was described after that. Finally, the circuit modeling of simulink and simulation waveforms were given, which proved the theoretical analyze. |
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