GB1183543A - Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies - Google Patents

Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies

Info

Publication number
GB1183543A
GB1183543A GB4878467A GB4878467A GB1183543A GB 1183543 A GB1183543 A GB 1183543A GB 4878467 A GB4878467 A GB 4878467A GB 4878467 A GB4878467 A GB 4878467A GB 1183543 A GB1183543 A GB 1183543A
Authority
GB
United Kingdom
Prior art keywords
lamp
inductance
oscillations
circuit
thyristor
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
GB4878467A
Inventor
Peter Robert Walshe
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB4878467A priority Critical patent/GB1183543A/en
Publication of GB1183543A publication Critical patent/GB1183543A/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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
    • 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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1,183,543. Supply systems for gas discharge lamps. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. 7 Oct., 1968 [26 Oct., 1967], No. 48784/67. Heading H2H. Circuit for starting and operating a discharge lamp includes a series-resonant LC circuit in series with a voltage breakdown device and a suppressor inductance. In use, the breakdown device initiates oscillations for starting the lamp, and high frequency harmonics are suppressed by the inductance. In the circuit shown in Fig. 1, a ballast choke 3 operates as an autotransformer, the primary EF of which forms a series-resonant circuit with a capacitor 5. Initially, the capacitor is charged through a diode 6 from an A.C. source Vs until a Zener diode 10 breaks down and triggers a thyristor 8. Free oscillations at a frequency of the order of several kilocycles per second are now set up in the inductance EF & capacitor 5 until blocked by the thyristor 8 switching off. Radio frequency harmonics of the resonant oscillations also tend to arise, but these are suppressed by the low-value inductance 7. The thyristor 8 will continue to fire at intervals of one or more supply cycles until the lamp is started. The lamp discharge is then maintained by the supply Vs and the high frequency oscillations are short-circuited through the lamp. In a modification, Fig. 2 (not shown), the voltage breakdown device takes the form of a pair of anti-parallel Shockley diodes.
GB4878467A 1967-10-26 1967-10-26 Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies Expired GB1183543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4878467A GB1183543A (en) 1967-10-26 1967-10-26 Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4878467A GB1183543A (en) 1967-10-26 1967-10-26 Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies

Publications (1)

Publication Number Publication Date
GB1183543A true GB1183543A (en) 1970-03-11

Family

ID=10449903

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4878467A Expired GB1183543A (en) 1967-10-26 1967-10-26 Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies

Country Status (1)

Country Link
GB (1) GB1183543A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2262898A1 (en) * 1974-03-01 1975-09-26 Philips Nv
JPS52132181U (en) * 1976-04-02 1977-10-07
GB2137830A (en) * 1983-04-05 1984-10-10 Lutron Electronics Co Improved pulse network for discharge lamp dimming
EP0383385A1 (en) * 1989-02-15 1990-08-22 Philips Electronics North America Corporation Two-lead igniter for HID lamps

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2262898A1 (en) * 1974-03-01 1975-09-26 Philips Nv
JPS52132181U (en) * 1976-04-02 1977-10-07
GB2137830A (en) * 1983-04-05 1984-10-10 Lutron Electronics Co Improved pulse network for discharge lamp dimming
EP0383385A1 (en) * 1989-02-15 1990-08-22 Philips Electronics North America Corporation Two-lead igniter for HID lamps
US4959593A (en) * 1989-02-15 1990-09-25 North American Philips Corporation Two-lead igniter for HID lamps

Similar Documents

Publication Publication Date Title
ATE14818T1 (en) BREAKDOWN ARRANGEMENT FOR OPERATING LOW-PRESSURE DISCHARGE LAMPS.
US4008414A (en) Circuit for powering fluorescent lamps
US3662249A (en) Dc-ac converter
GB1414051A (en) Emergency supply system for arc discharge devices
US3170085A (en) Ballast circuit and system for dimming gaseous discharge lamps
US4013921A (en) Warning light control
GB949829A (en) Improvements in or relating to electric supply arrangements for gas discharge tubes
GB922119A (en) Transistor power inverter
GB1183543A (en) Improvements in or relating to Circuit Arrangements for Starting Electric Discharge Lamps from Alternating Current Supplies
US3476977A (en) Impulse starting and operating circuit for gas discharge lamps
KR840001992A (en) Electronic ballast for discharge lamp
GB1178956A (en) Method for operating fluorescent tubes
GB1183542A (en) Improvements in or relating to circuit arrangements for starting and operating electric discharge lamps from alternating current supplies
US3688123A (en) Emergency fluorescent lighting apparatus
KR900015582A (en) Power supply circuit
US2953721A (en) Electronic flash lighting system
GB1208489A (en) Circuit arrangement for igniting and supplying a gas and/or vapour-discharge lamp
US2170448A (en) Electric discharge apparatus
GB1398383A (en) Starting circuits for electric discharge lamps
US3781597A (en) Lighting device for a discharge lamp
US2708251A (en) Starting circuit for mercury lamps
US3585483A (en) Power supply
ES267433A1 (en) High frequency lighting systems and ballast circuits therefor
GB1089827A (en) Transistor inverter with only one transistor
ES347512A1 (en) Starting and operating circuit for gas discharge lamps

Legal Events

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