System and method for controlling power factor and power convert

Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source

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323285, 323288, G05F 170, G05F 1614

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active

060345136

ABSTRACT:
A power factor controller, a method of controlling power factor and a power converter employing either the controller or the method. The controller includes: (1) a ramp circuit that senses an output voltage of a converter being controlled and generates an intermediate waveform that rises as a function of a magnitude of the output voltage and (2) a drive circuit, coupled to the ramp circuit, that senses a current in the converter and causes the intermediate waveform to fall at a time that is a function of a magnitude of the current, the drive circuit generating a drive signal for the converter from the intermediate waveform.

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Dragan Maksimovic, Yungtaek Jang, and Robert Erickson, NonLinear-Carrier Control for High Power Factor Boost Rectifiers. 1995 IEEE APEC(pp. 635-641).
Jay Rajagopalan, Fred C. Lee and Paolo Nora, A Generalized Technique for Derivation of Linear Average Current Mode Control Laws for Power Factor Correction without Input Voltage Sensing. VPEC SeminarProceedings--September 19-21, 1996, (pp. 23-28).
Joel P. Gegner and C.Q. Lee, Linear Peak Current Mode Control: A Simple Active Power Factor Correction Control Technique for Continuous Conduction Mode. Proceedings of PESC 1996, (pp. 196-202).
Jeffrey Hwang, Alland Chee and Wing-Hung Ki, New Universal Control Methods for Power Correction and DC to DC Converter Applications, IEEE APEC 1997 (pp. 59-65).
"A General Constant Frequency Pulse-Width Modulator and Its Applications" by Zheren Lai and Keyue M. Smedley; Sep. 1996; pp. 279 -290.
"A Family of Power-Factor-Correction Controllers" by Zheren Lai and Keyue M. Smedley; 1997; pp. 66-73.

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