Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Patent
1982-05-03
1985-04-02
Dixon, Harold
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
315206, 315219, 315250, 315288, H05B 3702
Patent
active
045089965
ABSTRACT:
The invention is both a system for supplying high frequency alternating current to gas discharge lamps, such as fluorescent lamps, and the like and a unit that can be placed in or adjacent to a lighting fixture to convert a direct current supply into high frequency AC and also provide the ballast needed for operation of the gas discharge lamps. This unit contains a symmetrical, class B, push-pull current-limited, tuned-collector, sinusoidal oscillator which is self starting, highly efficient and stable over a wide range of input voltage, with or without load. The number of parts is a minimum and the parts are relatively low cost, the power losses are very low and the system operates at high power factor with low acoustic and radio noise and low flicker. The system may derive the current from a commercially available source at any voltage and phase but preferably three phase 60 Hz current is used because the three phase primary of a building transformer can convert this into six phase at the output terminals which can be converted to DC of low ripple even without filtering. From the central building supply, it is possible to send AC at suitable voltage to subcenters in the building for rectification, inversion and use in lighting fixtures but preferably there is a single rectifier adjacent to the main transformer and the DC at proper voltage is distrubuted to the fixtures where the ballast unit is installed in a fixture to supply the lamps in it with the high frequency AC. However, one ballast unit can serve, in many instances, more lamps than a single fixture holds and it is necessary in such instances to supply the high frequency AC from one fixture to another and this can be done with only two wires. The invention also provides means for dimming the lights, for supplying heating current to lamp filaments at high voltage at the start and much reduced voltage after the arc has been struck in the lamps served by the ballast unit, and this reduction in filament current takes place automatically without switches, resistors or other expensive and energy consuming means. The transformers used in the practice of the invention may also be used to supply the building with AC for customary appliances, incandescent lighting, and the like.
REFERENCES:
patent: 1158477 (1915-11-01), Fortescue
patent: 2103950 (1937-12-01), Leukert
patent: 2146571 (1939-02-01), Gunther
patent: 2964676 (1960-12-01), Davies
patent: 3075123 (1963-01-01), Faulds
patent: 3230382 (1966-01-01), Burns et al.
patent: 3290510 (1966-12-01), Rose
patent: 3396307 (1968-08-01), Campbell
patent: 3474256 (1969-10-01), Bergent
patent: 3521120 (1970-07-01), Anderson
patent: 3753071 (1973-08-01), Engel et al.
patent: 3769545 (1973-10-01), Crane
patent: 3769571 (1973-10-01), Wilkinson
patent: 3922582 (1975-11-01), Pitel
patent: 4004185 (1977-01-01), Edmondson et al.
patent: 4005335 (1977-01-01), Pepper
patent: 4008414 (1977-02-01), Agnew
patent: 4019115 (1977-04-01), Lips
patent: 4045711 (1977-08-01), Pitel
patent: 4053813 (1977-10-01), Kornrumph
patent: 4075476 (1978-02-01), Pitel
patent: 4127795 (1978-11-01), Kroll
patent: 4210846 (1980-07-01), Capewell et al.
patent: 4251752 (1981-02-01), Stolz
patent: 4277728 (1981-07-01), Stevens
J. H. Campbell and B. D. Bedford, Fluorescent Lamp Operation at Frequencies Above 60 Cycles, 1947, Proceedings of Natn'l Electronics Conf., vol. 3, pp. 480-493.
John H. Campbell, High Frequency Operation of Fluorescent Lamps, Illuminating Engineering, vol. 43, No. 2, Feb. 1948, pp. 125-140.
John H. Campbell, Special Circuits for Fluorescent Lamps, Apr. 1950, Illuminating Engineering, vol. 45, No. 4, pp. 235-241.
John H. Campbell, Characteristics & Applications of High Frequency Fluorescent Lighting, Feb. 1953, Illuminating Engineering, vol. 48, No. 2, pp. 95-103.
John H. Campbell, Elements of High Frequency Fluorescent Lighting, Jul. 1957, Illuminating Engineering, vol. 52, No. 7, pp. 337-342.
John H. Campbell, New Parameters for High Frequency Lighting Systems, May 1960, Illuminating Engineering, vol. 55, No. 5, pp. 247-256.
John H. Campbell, Characteristics of a New 3000-CPS System for Industrial and Commercial Lighting, Mar. 1965, Illuminating Engineering, vol. 60, No. 3, pp. 148-156.
Funke and Oranje, Gas Discharge Lamps, 1951, Philips' Gloeilampenfabrieken.
Zwikker, Fluorescent Lighting, 1952, Philips Technical Library, pp. 73-143.
D. E. Spencer, Grequency and Fluorescent Lamps, 1953, Electrical Engineering, vol. 72, No. 12, pp. 1066-1071.
Shelly Krasnow, Converter Equipment, 1957, Elluminating Engineering, vol. 52, No. 7, pp. 353-356.
George Gilleard, Fluorescent Lighting Systems from Gas-Driven Turbines, 1964, Illuminating Engineering, vol. 58, No. 3, pp. 163-169.
John H. Campbell, from a paper presented to the National Technical Conf. of the Illuminating Engineering Society in San Francisco, CA, 1959, pp. 560-562.
J. J. Ebers and J. L. Moll, Large-Signal Behavior of Junction Transistors, 1954, Proceedings of the Institute of Radio Engineers, vol. 42, pp. 1754-1772.
John L. Moll, Large-Signal Transient Response of Junction Transistors, 1954, Proceedings of the Institute of Radio Engineers, vol. 42, pp. 1773-1784.
George C. Uchrin & Wilfred O. Taylor, A New Self-Excited Square Wave Transistor Power Oscillator, 1955, Proceedings, Institute of Radio Engineers, vol. 43.
R. L. Bright, Junction Transistors used as Switches, 1955, AIEE Transactions, vol. 74, pp. 111-121.
G. H. Royer, A Switching Transistor DC to AC Converter Having an Output Frequency Proportional to the DC Input Voltage, 1955, AIEE Transactions, vol. 73, pp. 322-326.
C. J. Yarrow, Transistor Converters for the Generation of High-Voltage Low-Current DC Supplies, 1959, Proceedings, Institution of Electrical Engineers, vol. 106, pp. 1320-1324.
W. H. Johnson, J. L. Winpisinger and J. F. Roesel, Jr., A New High Frequency Power Source for Fluorescent Lighting, 1959, Illuminating Engineering, vol. 54, pp. 43-50.
W. H. Johnson, Progress in Static Converters for High Frequency Fluorescent Lighting, 1961, Illuminating Engineering, vol. 56, pp. 379-383.
Robert J. Haver, The Verdict is in: Solid State Fluorescent Ballasts are Here, 1976, Electronic Design News, pp. 65-68.
Charles Cohen, Transistor Ballast Cuts Power Loss, 1979, Electronics.
Chester L. Dawes, A Course in Electrical Engineering, vol. II, 1947, Alternating Currents, 4th Ed., McGraw Hill Book Co. pp. 534-587.
Clegg John C.
Davis Ariel R.
Brigham Young University
Dixon Harold
Glaser Kenneth R.
LandOfFree
High frequency supply system for gas discharge lamps and electro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High frequency supply system for gas discharge lamps and electro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High frequency supply system for gas discharge lamps and electro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1092740