GB1477202A - Corona power supply circuit - Google Patents

Corona power supply circuit

Info

Publication number
GB1477202A
GB1477202A GB606574A GB606574A GB1477202A GB 1477202 A GB1477202 A GB 1477202A GB 606574 A GB606574 A GB 606574A GB 606574 A GB606574 A GB 606574A GB 1477202 A GB1477202 A GB 1477202A
Authority
GB
United Kingdom
Prior art keywords
circuit
pulses
pulse
capacitor
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB606574A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coulter Information Systems Inc
Original Assignee
Coulter Information Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coulter Information Systems Inc filed Critical Coulter Information Systems Inc
Publication of GB1477202A publication Critical patent/GB1477202A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0283—Arrangements for supplying power to the sensitising device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1477202 D.C.-D.C. converters COULTER INFORMATION SYSTEMS Inc 11 May 1974 [11 July 1973] 6065/74 Heading H2F A circuit for providing a high voltage for a corona discharge device, e.g. a portable xerographic image recorder, comprises a pulse source 24 feeding a pulse shaping circuit 48 arranged to draw current from a D.C. source only during each pulse, and coupled to a voltage multiplying rectifier 66 feeding the corona discharge device 114. A control circuit is included so as to terminate the high voltage output after a predetermined number of pulses from the source 24. As shown, when a pushbutton 15 is depressed, a monostable circuit comprising C-MOS gates 26, 28 is enabled for a period determined by capacitor 40 and resistors 42, 44. During this period, a pulse oscillator comprising C-MOS gates 30, 32 and capacitor 36 provides pulses at 5 kHz which are fed to a shaping circuit 48 which provides short duration pulses in the primary of transformer 68. The resulting 1000 V pulses in the secondary are converted to 6000 V D.C. across capacitor 100 which is fed to a load 114 in the form the corona electrode positioned adjacent the film in a xerographic recording device. Zener diode 62 provides over-voltage protection when operating on low load. The circuit may be formed into a module of approximately one inch cube. Supply of auxiliary low D.C. voltage.-Zener diode 116 may be included between junction 102 and ground so as to provide 47 V for a toner exciting surface. Alternatively, 30 V D.C. can be provided by connecting terminal 124 to terminal A. Terminals 130, 132 may be connected to terminals A, B so as to provide 42 V D.C.
GB606574A 1973-07-11 1974-05-11 Corona power supply circuit Expired GB1477202A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37813673A 1973-07-11 1973-07-11

Publications (1)

Publication Number Publication Date
GB1477202A true GB1477202A (en) 1977-06-22

Family

ID=23491878

Family Applications (1)

Application Number Title Priority Date Filing Date
GB606574A Expired GB1477202A (en) 1973-07-11 1974-05-11 Corona power supply circuit

Country Status (8)

Country Link
JP (1) JPS5843738B2 (en)
BE (1) BE810880A (en)
CH (1) CH585420A5 (en)
DE (1) DE2406486C2 (en)
FR (1) FR2237230B1 (en)
GB (1) GB1477202A (en)
IT (1) IT1008830B (en)
NL (1) NL7401809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996013086A1 (en) * 1994-10-20 1996-05-02 Joshua Shaw Improvements in or in relation to negative air ion generators
EP1736834A1 (en) * 2005-06-25 2006-12-27 Samsung Electronics Co, Ltd High Voltage Power Supply and Digital Control Method Thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028596A (en) * 1974-12-13 1977-06-07 Coulter Information Systems, Inc. Corona power supply circuit
JPS59149341U (en) * 1983-03-26 1984-10-05 日本電気ホームエレクトロニクス株式会社 Operation button mounting device
JPH0342586Y2 (en) * 1985-07-19 1991-09-06

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1120018B (en) * 1957-11-02 1961-12-21 Harro Mueller Dipl Ing Flash unit with control circuit
US2965755A (en) * 1958-06-04 1960-12-20 West Maxwell George Method of and means for producing a corona discharge
US3287614A (en) * 1963-05-27 1966-11-22 Rca Corp Portable, self-powered, corona charging apparatus
US3260893A (en) * 1964-01-06 1966-07-12 Dynasciences Corp Electrostatic discharging system for aircraft
US3355639A (en) * 1965-04-05 1967-11-28 Harris Intertype Corp Sheet handling apparatus
DE1921357A1 (en) * 1969-04-26 1970-11-12 Licentia Gmbh DC-DC converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996013086A1 (en) * 1994-10-20 1996-05-02 Joshua Shaw Improvements in or in relation to negative air ion generators
EP1736834A1 (en) * 2005-06-25 2006-12-27 Samsung Electronics Co, Ltd High Voltage Power Supply and Digital Control Method Thereof

Also Published As

Publication number Publication date
IT1008830B (en) 1976-11-30
BE810880A (en) 1974-08-12
DE2406486C2 (en) 1983-03-03
JPS5843738B2 (en) 1983-09-28
CH585420A5 (en) 1977-02-28
FR2237230A1 (en) 1975-02-07
JPS5029045A (en) 1975-03-24
NL7401809A (en) 1975-01-14
FR2237230B1 (en) 1978-01-06
DE2406486A1 (en) 1975-01-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee