A new bridgeless PFC Sepic and Cuk rectifiers with low conduction and switching losses

New bridgeless single phase AC-DC power factor correction (PFC) rectifiers based on Sepic and Cuk topologies are proposed. The absence of an input diode bridge and the presence of only two semiconductor switches in the current flowing path during each switching cycle results in less conduction losse...

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Bibliographic Details
Main Authors: Sabzali, Ahmad J., Ismail, Esam H., Al-Saffar, Mustafa A., Fardoun, Abbas A.
Format: Conference Proceeding
Language:English
Subjects:
Bridge circuits
Bridgeless rectifier
Cuk converter
Power factor correction
power factor correction (PFC)
Power semiconductor switches
rectifier
Rectifiers
Semiconductor diodes
Sepic converter
Switching converters
Switching loss
Thermal conductivity
Thermal management
Topology
total harmonic distortion (THD)
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Summary:New bridgeless single phase AC-DC power factor correction (PFC) rectifiers based on Sepic and Cuk topologies are proposed. The absence of an input diode bridge and the presence of only two semiconductor switches in the current flowing path during each switching cycle results in less conduction losses and improved thermal management compared to the conventional Sepic and Cuk PFC converters. The proposed topologies are designed to work in discontinuous conduction mode (DCM) to achieve almost unity power factor in a simple and effective manner. The DCM operation gives additional advantages such as: zero-current turn-on in the power switches, zero-current turn-off in the output diode, and reduces the complexity of the control circuitry. The proposed rectifiers are investigated theoretically. Performance comparisons between the proposed and conventional Sepic PFC rectifiers are performed. Simulation and experimental results are provided for a design example of a 65W/48V at 100 V rms line voltage to evaluate the performance of the proposed PFC rectifier.
ISSN:2164-5256
DOI:10.1109/PEDS.2009.5385704