Analysis and Design of a Three-Phase Cuk-derived PFC Converter

A new three-phase Cuk-derived power factor corrected (PFC) converter with three switches in wye configuration for aircraft application is presented. The proposed converter benefits limited components for its operation and only one semiconductor from each phase is in conduction throughout the converter operation which will reduce the converter conduction losses further reduces thermal management. In addition, the control effort required for converter operation is very less as all switches are driven by one gate signal. The output inductor of the converter is designed for discontinuous current operation for the entire power range to realize natural PFC at AC power source. With the use of only one sensor in contradictory of using five sensors in conventional PFC converter, the proposed system is more economical, and more reliable. A detailed discussion on the converter steady-state operation for one switching cycle is presented, and the design expressions are derived to ease the converter design. Further, the feasibility of the proposed scheme and the design are verified with both simulation and experimental results, and they confides good agreement with the analysis and confirms the design.