Title:
A METHOD AND VOLTAGE FEEDBACK CIRCUITRY FOR IMPROVING THE PERFORMANCE OF APFC CONVERTERS
Document Type and Number:
WIPO Patent Application WO2004055612
Kind Code:
A3
Abstract:
An Active Power Factor Correction (APFC) apparatus having improved output voltage regulation, for switching a power supply fed by an array of rectifying diodes and consisting of at least an input inductor, a contact of which is connected in series with a contact of the array, and of controllable power switch connected in tandem with the array and the input indicator, that comprises a) sampling circuitry, for sampling the instantaneous value of the output voltage; b) control circuitry, for controlling switch in response to an error signal, and, thereby, causing the instantaneous value to be essentially similar to a predetermined nominal value; c) amplifier circuitry, for generating the error signal, the amplifier circuitry having at least a reference input connected to a reference signal, being determined according to the nominal value and sampling circuitry, and an input, to which an input signal is provided, the error signal represents the deviation of the input signal from the reference signal is provided, the error signal represents the deviation of the input signal from the reference signal; and d)circuitry for providing a low-pass filtered first indication signal to the input, whenever the deviation, of the output signal, of the sampling circuitry, from a second indication signal to the amplifier circuitry whenever the deviation exceeds the predetermined value, the second indication signal being related to higher deviation values.
Inventors:
BEN-YAAKOV SHMUEL (IL)
Application Number:
PCT/IL2003/001081
Publication Date:
September 02, 2004
Filing Date:
December 16, 2003
Export Citation:
Assignee:
GREEN POWER TECHNOLOGIES LTD (IL)
BEN-YAAKOV SHMUEL (IL)
BEN-YAAKOV SHMUEL (IL)
International Classes:
G05F1/70; (IPC1-7): G05F1/40; G05F1/70
Foreign References:
| US6445600B2 | 2002-09-03 | |||
| US6385057B1 | 2002-05-07 | |||
| US6307631B1 | 2001-10-23 | |||
| US5960207A | 1999-09-28 | |||
| US6570366B1 | 2003-05-27 |
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