Browse Prior Art Database

CAPACITOR CHARGING SYSTEM FOR ENERGY STORAGE

IP.com Disclosure Number: IPCOM000025169D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 4 page(s) / 112K

Publishing Venue

Xerox Disclosure Journal

Abstract

There is disclosed a capacitance charger that relates to flash fusing or illumination in xerographic machines wherein a means of energy storage must be provided for later discharge through a flash tube.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 57% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

CAPACITOR CHARGING SYSTEM FOR ENERGY STORAGE
Elihue N. Wright

Proposed Classification
U.S. Cl. 315/170 Int. C1. H05b 37/00

Adrian L. Stiiard
Jerry Adams

FIG. 2

FIG 3

LI

Volume 8 Number 6 November/December 1983 483

[This page contains 1 picture or other non-text object]

Page 2 of 4

CAPACITOR CHARGING SYSTEM FOR ENERGY STORAGE (Cont'd)

There is disclosed a capacitance charger that relates to flash fusing or illumination in xerographic machines wherein a means of energy storage must be provided for later discharge through a flash tube.

With reference to Figure 1, assume that Co is uncharged. There are two modes by which Co can be charged:

Mode 1: Direct path involving L1, D , D and Co. This path is open only during positive 1 /2 cycles of VAc and only whfie tEe load voltage is less than fl VAco

Mode 2: This is a two step process, the first step of which takes place only during

designably chosen relatiork6p to the frequency 04 such that current flows

across C1 exceeds fi VAc. The right-hand terminal of C1 is positive.

The second step in Mode 2 takes place only during positive 1/2 cycles of V and involves L1, the now charged C1, DE and C . Current flows only for a pohsn of the 1/2 cycle. A portion of the voltage n e is ladled (transferred) onto Co. Over time the voltage on Co will approach 2 7% $ACo

A similar double mode process is accomplished in the circuit of Figure 2 with the essential difference that the diode steering directions are reversed; Mode 1 occurs during negative 1/2 cycles; and Mode 2 negative/positive 1 /2 cycles are reversed.

negative 1/2 cycles of V and involves DB, C L1. L and C1 bear a

only for a portion of the negative 1/2 cycle and the consequent voltage

The logical combination of Figures I and 2, shown in Figure 3, thus enables an overall output voltage approaching 4 <VAc developed across an effective load capacitance of C /2. The addition of inductor L in a transfor...