FR2434547A1 - VARIABLE LOW-FREQUENCY GRADATION FOR HIGH-INTENSITY GAS DISCHARGE LAMPS - Google Patents

VARIABLE LOW-FREQUENCY GRADATION FOR HIGH-INTENSITY GAS DISCHARGE LAMPS

Info

Publication number
FR2434547A1
FR2434547A1 FR7921310A FR7921310A FR2434547A1 FR 2434547 A1 FR2434547 A1 FR 2434547A1 FR 7921310 A FR7921310 A FR 7921310A FR 7921310 A FR7921310 A FR 7921310A FR 2434547 A1 FR2434547 A1 FR 2434547A1
Authority
FR
France
Prior art keywords
discharge lamps
gas discharge
frequency
variable low
intensity gas
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.)
Pending
Application number
FR7921310A
Other languages
French (fr)
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.)
Esquire Inc
Original Assignee
Esquire 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 Esquire Inc filed Critical Esquire Inc
Publication of FR2434547A1 publication Critical patent/FR2434547A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne la gradation de lampes à décharge, d'intensité élevée. Elle se caractérise en ce qu'un générateur à fréquence variable 14 produisant une tension alternative d'amplitude constante et de fréquence variable est relié à un ballast non purement résistif 12 de lampe 10, de manière à accroître l'impédance du ballast et à réduire ainsi le courant dans la lampe lorsque la fréquence diffère de la fréquence normale. L'invention s'applique à l'éclairage des rues, des parkings, des entrepôts.The invention relates to the dimming of high intensity discharge lamps. It is characterized in that a variable frequency generator 14 producing an alternating voltage of constant amplitude and variable frequency is connected to a non-purely resistive ballast 12 of lamp 10, so as to increase the impedance of the ballast and to reduce thus the current in the lamp when the frequency differs from the normal frequency. The invention applies to the lighting of streets, car parks, warehouses.

FR7921310A 1978-08-25 1979-08-17 VARIABLE LOW-FREQUENCY GRADATION FOR HIGH-INTENSITY GAS DISCHARGE LAMPS Pending FR2434547A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US93688278A 1978-08-25 1978-08-25

Publications (1)

Publication Number Publication Date
FR2434547A1 true FR2434547A1 (en) 1980-03-21

Family

ID=25469192

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7921310A Pending FR2434547A1 (en) 1978-08-25 1979-08-17 VARIABLE LOW-FREQUENCY GRADATION FOR HIGH-INTENSITY GAS DISCHARGE LAMPS

Country Status (9)

Country Link
AU (1) AU526724B2 (en)
BE (1) BE878227A (en)
CA (1) CA1130852A (en)
DE (1) DE2931794A1 (en)
ES (1) ES483620A1 (en)
FR (1) FR2434547A1 (en)
GB (1) GB2029134B (en)
IT (1) IT1117392B (en)
MX (1) MX147513A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU564304B2 (en) * 1982-01-15 1987-08-06 Minitronics Pty. Limited Electronic high frequency controlled device for operating gasdischarge lamps
US4843627A (en) * 1986-08-05 1989-06-27 Stebbins Russell T Circuit and method for providing a light energy response to an event in real time
DE19708187A1 (en) * 1997-02-28 1998-09-03 Uwe Unterwasser Electric Gmbh Lamp circuit control
GB2477507A (en) * 2010-02-03 2011-08-10 Emil Blumer Control of luminance of gas discharge lamp using variable frequency drive

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720279A (en) * 1951-08-09 1954-12-15 Gen Electric Co Ltd Improvements in or relating to circuits for operating electric discharge lamps
GB955656A (en) * 1959-05-19 1964-04-15 A E I Lamp And Lighting Compan Operation of electric discharge lamps
DE2325872A1 (en) * 1972-05-24 1973-12-06 Gen Electric QUICK START IGNITION SYSTEM FOR ARC DISCHARGE DEVICES FOR EMERGENCY LIGHTING

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720279A (en) * 1951-08-09 1954-12-15 Gen Electric Co Ltd Improvements in or relating to circuits for operating electric discharge lamps
GB955656A (en) * 1959-05-19 1964-04-15 A E I Lamp And Lighting Compan Operation of electric discharge lamps
DE2325872A1 (en) * 1972-05-24 1973-12-06 Gen Electric QUICK START IGNITION SYSTEM FOR ARC DISCHARGE DEVICES FOR EMERGENCY LIGHTING

Also Published As

Publication number Publication date
ES483620A1 (en) 1980-04-01
GB2029134B (en) 1982-11-03
AU526724B2 (en) 1983-01-27
IT1117392B (en) 1986-02-17
AU5008979A (en) 1980-02-28
MX147513A (en) 1982-12-10
GB2029134A (en) 1980-03-12
BE878227A (en) 1979-12-03
CA1130852A (en) 1982-08-31
DE2931794A1 (en) 1980-03-06
IT7949748A0 (en) 1979-07-13

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