GB1179001A - Improvements in Lighting-Control Systems - Google Patents

Improvements in Lighting-Control Systems

Info

Publication number
GB1179001A
GB1179001A GB22535/67A GB2253567A GB1179001A GB 1179001 A GB1179001 A GB 1179001A GB 22535/67 A GB22535/67 A GB 22535/67A GB 2253567 A GB2253567 A GB 2253567A GB 1179001 A GB1179001 A GB 1179001A
Authority
GB
United Kingdom
Prior art keywords
voltage
input
lamps
capacitor
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
GB22535/67A
Inventor
Anthony Leonard Isaacs
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries Ltd
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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB22535/67A priority Critical patent/GB1179001A/en
Priority to US695202A priority patent/US3588598A/en
Priority to SE06497/68A priority patent/SE348921B/xx
Priority to DE1763367A priority patent/DE1763367C3/en
Priority to NL6806885.A priority patent/NL164978C/en
Publication of GB1179001A publication Critical patent/GB1179001A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/2573—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit
    • 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
    • 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

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)

Abstract

1,179,001. Control of stage lighting. THORN ELECTRICAL INDUSTRIES Ltd. 15 May, 1967, No. 22535/67. Heading H2H, A lighting system particularly for stage lighting is controlled by the difference between an input signal and a voltage derived from a simulated load. A relaxation oscillator comprising a capacitor C and unijunction transistor UJT supplies firing pulses to thyristors SCR4, SCR5 which in turn fire thyristors SCR1, SCR2 in series with lamps L. At the same time firing pulses are also supplied to another thyristor SCR3 controlling current into a simulated load R18, R38, C4, the voltage across which is tapped from a potentiometer R39, R40 and applied to one input of a difference amplifier VT1, VT2 the other input of which receives a control signal CS. Amplifiers VT1, VT2 through transistors VT4, VT5 controls the charging rate of capacitor C and hence the average voltage across lamps L. Saturable inductors LF, LF may be included in the circuit. The voltage across capacitor C4 is stated to be substantially representative of that across the lamps L. The system adjusts itself so that both input voltages to the difference amplifier are equalized.
GB22535/67A 1967-05-15 1967-05-15 Improvements in Lighting-Control Systems Expired GB1179001A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB22535/67A GB1179001A (en) 1967-05-15 1967-05-15 Improvements in Lighting-Control Systems
US695202A US3588598A (en) 1967-05-15 1968-01-02 Lighting-control systems
SE06497/68A SE348921B (en) 1967-05-15 1968-05-14
DE1763367A DE1763367C3 (en) 1967-05-15 1968-05-15 Lighting control system
NL6806885.A NL164978C (en) 1967-05-15 1968-05-15 ELECTRICAL OPERATING SYSTEM OF A LIGHTING SYSTEM.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22535/67A GB1179001A (en) 1967-05-15 1967-05-15 Improvements in Lighting-Control Systems

Publications (1)

Publication Number Publication Date
GB1179001A true GB1179001A (en) 1970-01-28

Family

ID=10180961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22535/67A Expired GB1179001A (en) 1967-05-15 1967-05-15 Improvements in Lighting-Control Systems

Country Status (5)

Country Link
US (1) US3588598A (en)
DE (1) DE1763367C3 (en)
GB (1) GB1179001A (en)
NL (1) NL164978C (en)
SE (1) SE348921B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684919A (en) * 1970-12-10 1972-08-15 Berkey Colortran Mfg Inc Dimmer circuit
US3793557A (en) * 1972-07-17 1974-02-19 Berkey Colortran Dimmer circuit and gapped core inductor useful therewith
US3917969A (en) * 1973-11-16 1975-11-04 John G Olsen Electric load control
US4529888A (en) * 1982-09-13 1985-07-16 International Rectifier Corporation High voltage solid state relay
US4527099A (en) * 1983-03-09 1985-07-02 Lutron Electronics Co., Inc. Control circuit for gas discharge lamps
US4703197A (en) * 1986-05-28 1987-10-27 International Rectifier Corporation Phase-controlled power switching circuit
FR2775364B1 (en) * 1998-02-20 2003-06-20 Crouzet Automatismes PHASE ANGLE CONTROL METHOD
US7120405B2 (en) * 2002-11-27 2006-10-10 Broadcom Corporation Wide bandwidth transceiver
US7193404B2 (en) 2004-11-24 2007-03-20 Lutron Electronics Co., Ltd. Load control circuit and method for achieving reduced acoustic noise
TWI285519B (en) * 2005-11-04 2007-08-11 Delta Electronics Inc Method adopting square voltage waveform for driving flat lamps
US7486494B1 (en) * 2006-08-16 2009-02-03 National Semiconductor Corporation SCR with a fuse that prevents latchup
CN112997585B (en) * 2018-10-29 2024-03-22 昕诺飞控股有限公司 LED lighting device driver and driving method

Also Published As

Publication number Publication date
DE1763367C3 (en) 1974-09-12
DE1763367B2 (en) 1974-02-14
DE1763367A1 (en) 1972-02-03
NL164978C (en) 1981-02-16
NL6806885A (en) 1968-11-18
US3588598A (en) 1971-06-28
SE348921B (en) 1972-09-11

Similar Documents

Publication Publication Date Title
GB1179001A (en) Improvements in Lighting-Control Systems
US3213351A (en) Firing pulse generating circuit for solid state controlled rectifiers
GB924554A (en) Improvements in or relating to electrical control systems
US3506905A (en) Transistor triac regulated power supply
GB1078954A (en) Arc power supply
US1730254A (en) Control system
ES357831A1 (en) Motor control system with feedback and variable gain amplifier responsive to current
GB1268516A (en) Sample and hold voltage circuit for controlling variably energized load
US1968576A (en) Control apparatus for alternating current circuits
GB1047904A (en) Improvements in and relating to a stabilised unidirectional voltage supply
US3311806A (en) Gating device control means
GB1032493A (en) Control circuits for electric discharge devices
US3310728A (en) Regulated a.c.-d.c. converter system
US2721262A (en) Adjustable reference voltage unit
ES377136A1 (en) Arrangement for regulating the current supplied to the operative circuit of a commutating motor
US2367619A (en) Control system
GB1284636A (en) An arc welding machine
GB1199984A (en) Alternating Current Regulating Apparatus with Closed-Loop Feedback Control
US3049659A (en) Single input servo system
US3315150A (en) Wide range voltage regulator
GB1055496A (en) Voltage regulator systems
GB1173678A (en) Circuit Arrangement for Turning Off A.C. Operated Controlled Rectifiers.
GB1081484A (en) Improvements relating to a.c. power regulators
GB1278923A (en) Improvements in or relating to electrical control apparatus
GB1008256A (en) Power supply current regulation