Analysis of an Interleaved Zero Voltage Switching Boost Converter

An interleaved boost converter is presented in this paper to achieve zero voltage switching (ZVS), DC bus voltage regulation and reduce ripple current and input and output sides. Active snubber is adopted between the main switch and output side to limit the voltage stress on switch. When main switch is turned off, the positive resonant inductor current flows through the anti-parallel diode of auxiliary switch so that the auxiliary switch can be turned on at ZVS. When auxiliary switch is turned off the negative resonant inductor current will discharge the output capacitor of main switch so that the ZVS turn-on of main switch can be achieved. The interleaved pulse-width modulation (PWM) can further reduce the input and output ripple currents such that the sizes of input inductor and output capacitor are reduced. The circuit configuration, principle operation, system analysis, and design consideration of the proposed converter are presented. Finally, experiments conducted on a laboratory prototype rated at 160W were presented to demonstrate the performance of the proposed converter. Copyright (C) 2011 Praise Worthy Prize S.r.l. - All rights reserved.