HPF CONVERTER WITH ZVS TRANSITION

• This article presents a single-phase high-power factor ac/dc converter with soft-switching characteristic. The boost converter performs the function of power-factor correction (PFC) to obtain high power factor and low current harmonics at the input line.
• The buck converter further regulates the dc-link voltage to provide a stable dc output voltage.

                        

HPF converter with ZVS transition

• Without using any active-clamp circuit or snubber circuit, the active switches of the proposed converter can achieve zero-voltage switching-on (ZVS) transition together with high power factor that satisfies the IEC 61000-3- 2 standards over a wide load range from 30% to 100% rated power.
• The steady-state analysis is developed and a design example is provided. A prototype circuit of 60 W was built and tested.
• Experimental results verify the feasibility of the proposed circuit with satisfactory performance

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