Conference Paper

Recent advances in single-stage power factor correction

Sch. of Electr. Eng. & Comput. Sci., Central Florida Univ., Orlando, FL, USA
DOI: 10.1109/ICIT.2003.1290815 Conference: Industrial Technology, 2003 IEEE International Conference on, Volume: 2
Source: IEEE Xplore


This paper presents an overview of various interesting power factor correction techniques for single-phase applications. The discussion includes commonly-used control strategies and various types of converter topologies. Included is a comparative study of these strategies, with the major advantages and disadvantages is highlighted. We will emphasize the single-stage topologies, its drawbacks and some promising solutions.

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Available from: Issa Batarseh, Dec 25, 2013
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    ABSTRACT: xxiv, 105 p. : ill. ; 30 cm. PolyU Library Call No.: [THS] LG51 .H577M EE 2005 Law In recent years, power quality is very popular in the world. Most power converters and equipment are developed to have power factor correction technology to improve their power factors. In the past research, switched-capacitor DC-DC converters were mainly used on low power applications for converting the DC voltage. They contain high switching harmonic current in the supply. In this thesis, a zero-current switched-capacitor quasi-resonant AC-DC converter with power factor correction (PFC) voltage to frequency controller is introduced. The PFC circuits provide zero-current-switching low current stress for switching components and improve high power factor over 0.9. The voltage to frequency controller for power factor correction is shown to be stable. The control algorithm, mathematical analysis, design equations, and the circuits are discussed in details. Experimental results using aforesaid approach are demonstrated in the thesis to verify the behaviour of the design. M.Phil., Dept. of Electrical Engineering, The Hong Kong Polytechnic University, 2005.
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    ABSTRACT: With the increased interest in applying Power Factor Correction (PFC) to off-line AC-DC converters, the field of integrated, single-stage PFC converter development has attracted wide attention. Considering the tens of millions of low-to-medium power supplies manufactured each year for today's rechargeable equipment, the expected reduction in cost by utilizing advanced technologies is significant. To date, only a few single-stage topologies have made it to the market due to the inherit limitations in this structure. The high voltage and current stresses on the components led to reduced efficiency and an increased failure rate. In addition, the component prices tend to increase with increased electrical and thermal requirements, jeopardizing the overarching goal of price reduction. The absence of dedicated control circuitry for each stage complicates the power balance in these converters, often resulting in an oversized bus capacitance. These factors have impeded widespread acceptance of these new techniques by manufacturers, and as such single stage PFC has remained largely a drawing board concept. This dissertation will present an in-depth study of innovative solutions that address these problems directly, rather than proposing more topologies with the same type of issues. The direct energy transfer concept is analyzed and presented as a promising solution for the majority of the single-stage PFC converter limitations. Three topologies are presented and analyzed based on this innovative structure. To complete the picture, the dynamics of a variety of single-stage converters can be analyzed using a proposed switched transformer model.
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    ABSTRACT: A new single-stage power factor correction (SSPFC) converter is proposed for the adapter application, which is composed of a flyback converter and a front-end input current shaper. Low conduction losses are achieved with only two diode conduction drops in the primary side. The conversion efficiency is improved with a direct energy transfer path, which is provided by the feedback wingding. Equations and configurations are given to design the input current shaping (ICS) inductor and the magnetizing inductor of the transformer operating in discontinuous conduction mode (DCM) or in DCM/CCM boundary mode. The good performance of the converter is verified experimentally on a 90 W (19 V/4.74 A) SSPFC converter with universal line input.
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