GB1176360A - Improvements in Inverter Circuits - Google Patents

Improvements in Inverter Circuits

Info

Publication number
GB1176360A
GB1176360A GB37083/67A GB3708367A GB1176360A GB 1176360 A GB1176360 A GB 1176360A GB 37083/67 A GB37083/67 A GB 37083/67A GB 3708367 A GB3708367 A GB 3708367A GB 1176360 A GB1176360 A GB 1176360A
Authority
GB
United Kingdom
Prior art keywords
limbs
gap
gaps
windings
transformer
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
GB37083/67A
Inventor
Victor Farrow
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 Electronics Ltd
Original Assignee
Thorn Electronics 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 Electronics Ltd filed Critical Thorn Electronics Ltd
Priority to GB37083/67A priority Critical patent/GB1176360A/en
Priority to US738165A priority patent/US3703677A/en
Publication of GB1176360A publication Critical patent/GB1176360A/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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H05B41/2822—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Abstract

1,176,360. Supply circuits for discharge lamps. THORN ELECTRONICS Ltd. 11 Aug., 1967, No. 37083/67. Heading H2H. [Also in Division H1] The leaky transformer T 1 , Fig. 1, in an inverter circuit having switching transistors VT 1 , VT 2 , has its primary and secondary windings on opposite limbs of a closed magnetic circuit having air gaps Z/2 (Fig. 3) in those limbs, a magnetic shunt C, D air-gapped at y being provided between the windings. The length of gaps Z/2 is said to determine the pre-strike frequency when the transformer supplies a fluorescent lamp. The ratio of the gap y to the total main circuit gap 2 determines how much of the secondary pre-strike voltage is lost due to limbs C and D which may be wider than the core thickness and tapered at the ends. The apparatus may operate at from 5 to 50 (Kc./s.)
GB37083/67A 1967-08-11 1967-08-11 Improvements in Inverter Circuits Expired GB1176360A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB37083/67A GB1176360A (en) 1967-08-11 1967-08-11 Improvements in Inverter Circuits
US738165A US3703677A (en) 1967-08-11 1968-06-19 Fluorescent lamp inverter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37083/67A GB1176360A (en) 1967-08-11 1967-08-11 Improvements in Inverter Circuits

Publications (1)

Publication Number Publication Date
GB1176360A true GB1176360A (en) 1970-01-01

Family

ID=10393594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37083/67A Expired GB1176360A (en) 1967-08-11 1967-08-11 Improvements in Inverter Circuits

Country Status (2)

Country Link
US (1) US3703677A (en)
GB (1) GB1176360A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024522A2 (en) * 1979-08-06 1981-03-11 Siemens Aktiengesellschaft Inverter for operating at least two gas discharge lamps
GB2248985A (en) * 1990-08-24 1992-04-22 Coolite Ltd High frequency fluorescent tube driver
GB2263201A (en) * 1992-01-07 1993-07-14 Neet Lighting Limited Fluorescent light power source, inverter, transformer and transformer core

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887861A (en) * 1972-09-14 1975-06-03 Tokyo Keiki Kk Transistor inverter
US4187450A (en) * 1978-03-09 1980-02-05 General Electric Company High frequency ballast transformer
USRE33057E (en) * 1980-06-23 1989-09-12 Brigham Young University High frequency supply system for gas discharge lamps and electronic ballast therefor
US4318170A (en) * 1981-01-12 1982-03-02 Cabalfin Rolando V Power inverter oscillator circuit
US4560908A (en) * 1982-05-27 1985-12-24 North American Philips Corporation High-frequency oscillator-inverter ballast circuit for discharge lamps
US4667132A (en) * 1986-03-03 1987-05-19 Dianalog Systems, Inc. Electronic transformer system for neon lamps
US4700111A (en) * 1986-07-28 1987-10-13 Intelite Inc. High frequency ballast circuit
US4980611A (en) * 1988-04-05 1990-12-25 Neon Dynamics Corporation Overvoltage shutdown circuit for excitation supply for gas discharge tubes
US4916362A (en) * 1988-04-05 1990-04-10 Neon Dynamics Corporation Excitation supply for gas discharge tubes
US4933612A (en) * 1988-10-12 1990-06-12 Neonics, Inc. Excitation circuit for gas discharge lamp
US5474750A (en) * 1995-01-25 1995-12-12 Quantum Electronics Corporation Resonant power supply circuit for ozone generators
US5889373A (en) * 1996-12-30 1999-03-30 General Electric Company Fluorescent lamp ballast with current feedback using a dual-function magnetic device
US6317347B1 (en) * 2000-10-06 2001-11-13 Philips Electronics North America Corporation Voltage feed push-pull resonant inverter for LCD backlighting
DE102005029001A1 (en) * 2005-02-11 2006-08-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lamp base for a high-pressure discharge lamp and high-pressure discharge lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1353711A (en) * 1920-06-25 1920-09-21 Gen Electric Electric welding and reactor
US2170446A (en) * 1938-03-22 1939-08-22 Gen Electric Electric discharge apparatus
FR1035405A (en) * 1951-04-14 1953-08-24 Ribet & Desjardins Improvement in circuits for fluorescent tubes
US2949565A (en) * 1958-02-10 1960-08-16 Siemens Ag Direct current to alternating current inverter
GB909969A (en) * 1958-07-26
DE1233942B (en) * 1960-12-28 1967-02-09 Licentia Gmbh Circuit arrangement for low-voltage fluorescent lamps that are fed from a vehicle battery or a similar direct voltage source

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024522A2 (en) * 1979-08-06 1981-03-11 Siemens Aktiengesellschaft Inverter for operating at least two gas discharge lamps
EP0024522A3 (en) * 1979-08-06 1981-03-18 Siemens Aktiengesellschaft Berlin Und Munchen Inverter for operating at least two gas discharge lamps
GB2248985A (en) * 1990-08-24 1992-04-22 Coolite Ltd High frequency fluorescent tube driver
GB2248985B (en) * 1990-08-24 1994-08-03 Coolite Ltd Fluorescent tube driver
GB2263201A (en) * 1992-01-07 1993-07-14 Neet Lighting Limited Fluorescent light power source, inverter, transformer and transformer core

Also Published As

Publication number Publication date
US3703677A (en) 1972-11-21

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