Digital power-factor correction for a capacitor-charging power supply

The design and construction of a low-power low-cost power supply capable of charging an energy storage capacitor from a 120-V AC source and capable of power-factor correction (PFC) is presented. The load that is generally connected to a capacitor-charging power supply (CCPS) is a pulsed power load (...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2002-10, Vol.49 (5), p.1146-1153
Main Authors: Newsom, R.L., Dillard, W.C., Nelms, R.M.
Format: Article
Language:English
Subjects:
Capacitors
Charging
Construction
Control systems
Digital
Energy storage
Lamps
Logic
Optical pulses
Power factor
Power lasers
Power supplies
Pulsed power supplies
Reactive power
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Summary:The design and construction of a low-power low-cost power supply capable of charging an energy storage capacitor from a 120-V AC source and capable of power-factor correction (PFC) is presented. The load that is generally connected to a capacitor-charging power supply (CCPS) is a pulsed power load (i.e., laser, cardiac defibrillator, or flash lamp). A flyback converter was incorporated into the CCPS because it is capable of charging a capacitor while maintaining a high power factor. The control system of the CCPS uses peak current control to achieve PFC and is implemented using standard "off-the-shelf" digital logic components. A 300-V prototype has been constructed and tested. The experimental results show that a high power factor is obtained by the CCPS utilizing a flyback converter and the digital logic control system.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2002.803240