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Comparative study on efficiency and switching noise of bridgeless PFC circuits

Recently, efficiency improvement has been noted with the rapidly increasing consumption of energy. The diode loss in bridge rectifier is the main cause of efficiency decrease in conventional PFC circuit, it can not be neglected. Therefore bridgeless PFC circuit has been focused. In this research, the various bridgeless PFC circuits are analyzed. The results of switching noise are compared and efficiency improvement is verified.