Title :
An efficient PFC voltage regulator with reduced redundant power processing
Author :
Chow, Martin H L ; Tse, Chi K. ; Lee, Yim-Shu
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong
Abstract :
Conventional PFC power supplies employ two cascading stages that deal separately with PFC and voltage regulation. Since power is processed serially by two power stages, the efficiency is limited. In this paper a PFC power supply with improved efficiency is proposed. This circuit makes use of a parallel configuration that reduces unnecessary processing of all power by two stages serially. The circuit is derived from consideration of the power flow between the input, the load and the storage capacitor. A specific circuit implementation is described and the test results are reported
Keywords :
DC-DC power convertors; power factor correction; voltage control; voltage regulators; DC DC power convertors; PFC voltage regulator; cascading stages; efficiency improvement; power flow; power stages; power supplies; reduced redundant power processing; serial power processing; storage capacitor; voltage regulation; Circuit testing; Energy storage; Load flow; Power engineering and energy; Power factor correction; Power supplies; Reactive power; Regulators; Switched capacitor circuits; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
0-7803-5421-4
DOI :
10.1109/PESC.1999.788985
