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This paper proposes a novel single-stage high-power-factor ac/dc converter with symmetrical topology. The circuit topology is derived from the integration of two buck-boost power-factor-correction converters and a full-bridge series-resonant dc/dc converter. A high power factor at the input line is assured by operating the buck-boost converters in discontinuous conduction mode. With symmetrical operation...
This paper proposes a novel single-stage high-power-factor electronic ballast via the integration of a derivative buck-boost converter and a half-bridge resonant inverter. The derivative buck-boost converter employs two coupled inductors with an appropriate turns-ratio to conduct the current from the input line source into the designated power switches. With the tactful topology and delicately designed...
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