دانلود رایگان مقاله An Integrated High-Power-Factor Converter With ZVS Transition
IEEE TRANSACTIONS ON POWER ELECTRONICS
An Integrated High-Power-Factor Converter With ZVS Transition
This paper proposes a single-phase high-power-factor ac/dc converter with soft-switching characteristic. The circuit topology is derived by integrating a boost converter and a buck converter. The boost converter performs the function of powerfactor correction 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. Without using any active-clamp circuit or snubber circuit, the active switches of the proposed converter can achieve zero-voltage switching-on 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.
Index Terms—Boost converter, buck converter, power-factor correction (PFC), zero-voltage switching-on (ZVS).
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