GB1178440A - Lighting Control Circuit. - Google Patents

Lighting Control Circuit.

Info

Publication number
GB1178440A
GB1178440A GB782067A GB782067A GB1178440A GB 1178440 A GB1178440 A GB 1178440A GB 782067 A GB782067 A GB 782067A GB 782067 A GB782067 A GB 782067A GB 1178440 A GB1178440 A GB 1178440A
Authority
GB
United Kingdom
Prior art keywords
firing
terminals
load
circuit
lighting
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
GB782067A
Inventor
Nathan Gavron
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.)
Century Lighting Inc
Original Assignee
Century Lighting 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 Century Lighting Inc filed Critical Century Lighting Inc
Priority to GB782067A priority Critical patent/GB1178440A/en
Publication of GB1178440A publication Critical patent/GB1178440A/en
Expired 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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/08—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices
    • H05B39/083—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices by the variation-rate of light intensity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
    • G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Rectifiers (AREA)

Abstract

1,178,440. Lighting control circuits. CENTURY LIGHTING Inc. 17 Feb., 1967, No. 7820/67. Heading H2H. The illumination intensity of an incandescent lighting load L is controlled by the arrangement shown in the Figure, in which the firing angle of silicon-controlled rectifiers 36, 36<SP>1</SP> (in series with the load L and inverse-parallel connected with respect to each other) is varied by a D.C. signal applied between terminals 12, 14. Each rectifier 36, 36<SP>1</SP> has a respective firing circuit 38, 38<SP>1</SP> comprising (only circuit 38 will be described) a relaxation oscillator in the form of a doublebased diode 52 and a capacitor 58, which is charged during alternate half-cycles of the supply 18, 20 through corresponding members 58<SP>1</SP>, 64<SP>1</SP> of the circuit 38<SP>1</SP> and through an impedance network 66 consisting of identical saturable reactors 68, 70 having load windings 72, 74 in series aiding relationship and control windings 76, 78 in series opposing relationship. The signal at terminals 12, 14 is applied to control windings 76, 78 to vary the impedance of reactors 68, 70 and hence the charging time of the capacitor 58 or 58<SP>1</SP>, which time determines the instant of firing of the corresponding rectifier 36 or 36<SP>1</SP> whose conduction causes its firing circuit to be disabled (shorted out) for the remainder of the half-cycle. A resistor 102 maintains the firing circuits 38, 38<SP>1</SP> energized when the main contactor 30 controlling load L is open, this contactor being opened or closed by signals applied to its coils 98, 100 from a terminal 16. The signals at terminals 12, 14, 16 may control a plurality of separate lighting loads and may, in the case of terminals 12, 14, be in the form of smooth or pulsating D.C.
GB782067A 1967-02-17 1967-02-17 Lighting Control Circuit. Expired GB1178440A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB782067A GB1178440A (en) 1967-02-17 1967-02-17 Lighting Control Circuit.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB782067A GB1178440A (en) 1967-02-17 1967-02-17 Lighting Control Circuit.

Publications (1)

Publication Number Publication Date
GB1178440A true GB1178440A (en) 1970-01-21

Family

ID=9840386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB782067A Expired GB1178440A (en) 1967-02-17 1967-02-17 Lighting Control Circuit.

Country Status (1)

Country Link
GB (1) GB1178440A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402834A1 (en) * 2010-06-25 2012-01-04 Yuieh Hsene Electronics Co., Ltd. Alternating current regulating means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2402834A1 (en) * 2010-06-25 2012-01-04 Yuieh Hsene Electronics Co., Ltd. Alternating current regulating means

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