Electricity: power supply or regulation systems – Output level responsive – Phase controlled switching using electronic tube or a three...
Patent
1995-05-23
1997-05-13
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Phase controlled switching using electronic tube or a three...
323322, 323905, G05F 140
Patent
active
056296070
ABSTRACT:
A light dimmer is provided in which semiconductor power devices for each of the polarities of an alternating current supply are coupled between the alternating current supply and a lamp load. In the course of varying average power supplied to the lamp load, the semiconductor power devices transition between an initial one and a subsequent other of substantially conductive and non-conductive power conditions. The duration of the transition by the power device is increased beyond the minimum possible duration to reduce generated EMI. Methods of restoring each power device to its initial condition, including during a subsequent half-cycle, are described.
REFERENCES:
patent: 3142781 (1964-07-01), Izenour
patent: 3193728 (1965-07-01), Skirpan
patent: 3200327 (1965-08-01), Fleming
patent: 3243653 (1966-03-01), Locklin
patent: 3256463 (1966-06-01), Davis
patent: 3274484 (1966-09-01), Gebhardt et al.
patent: 3397344 (1968-08-01), Skirpan
patent: 3667030 (1972-05-01), Gordon et al.
patent: 3691404 (1972-09-01), Swygert, Jr.
patent: 3706913 (1972-12-01), Malatchi
patent: 3719858 (1973-03-01), Gilbreath
patent: 3821601 (1974-06-01), Kappenhagen et al.
patent: 3845351 (1974-10-01), von Ballmoos et al.
patent: 3879652 (1975-04-01), Billings
patent: 3898516 (1975-08-01), Nakasone
patent: 3924120 (1975-12-01), Cox III
patent: 3943397 (1976-03-01), Yancey
patent: 3990000 (1976-11-01), Digneffe
patent: 4016496 (1977-04-01), Eastcott
patent: 4057751 (1977-11-01), Bonsignore et al.
patent: 4080548 (1978-03-01), Johnson
patent: 4086526 (1978-04-01), Grudelbach
patent: 4219761 (1980-08-01), Mustoe
patent: 4241295 (1980-12-01), Williams, Jr.
patent: 4287468 (1981-09-01), Sherman
patent: 4325021 (1982-04-01), McMackin
patent: 4331914 (1982-05-01), Huber
patent: 4355309 (1982-10-01), Hughey et al.
patent: 4389598 (1983-06-01), Smith
patent: 4392187 (1983-07-01), Bornhorst
patent: 4417183 (1983-11-01), Popard et al.
patent: 4423478 (1983-12-01), Bullock et al.
patent: 4438356 (1984-03-01), Fleisher
patent: 4447765 (1984-05-01), Cote
patent: 4450384 (1984-05-01), Krokaugger
patent: 4461990 (1984-07-01), Bloomer
patent: 4484190 (1984-11-01), Bedard
patent: 4500802 (1985-02-01), Janutka
patent: 4504779 (1985-03-01), Haman
patent: 4528494 (1985-07-01), Bloomer
patent: 4540893 (1985-09-01), Bloomer
patent: 4547828 (1985-10-01), Bloomer
patent: 4567425 (1986-01-01), Bloomer
patent: 4598345 (1986-07-01), Kleeman
patent: 4617508 (1986-10-01), Bloomer
patent: 4633161 (1986-12-01), Callahan et al.
patent: 4649302 (1987-03-01), Damiano
patent: 4688154 (1987-08-01), Nilssen
patent: 4688161 (1987-08-01), Covington
patent: 4689547 (1987-08-01), Rowen et al.
patent: 4704656 (1987-11-01), Neiger
patent: 4705960 (1987-11-01), Lovrenich
patent: 4705962 (1987-11-01), Kinoshita et al.
patent: 4763220 (1988-08-01), Belbel et al.
patent: 4823069 (1989-04-01), Callahan et al.
patent: 4931916 (1990-06-01), Callahan
patent: 4949020 (1990-08-01), Warren et al.
patent: 4972125 (1990-11-01), Cunningham et al.
patent: 4975629 (1990-12-01), Callahan et al.
patent: 4977484 (1990-12-01), Cunningham et al.
patent: 4984143 (1991-01-01), Richardson
patent: 4987348 (1991-01-01), Wong
patent: 5004969 (1991-04-01), Schanin
patent: 5005211 (1991-04-01), Yuhasz
patent: 5015921 (1991-05-01), Carlson et al.
patent: 5239255 (1993-08-01), Schanin et al.
patent: 5268631 (1993-12-01), Gorman et al.
"Rites of Spring", Michael S. Eddy, Lighting Dimensions magazine, vol. XIII, No. 6, Sep. 1989, pp. 102-106.
"Non-SCR Dimmers", Karl G. Ruling, Theatre Crafts magazine, vol. 25, No. 4, Apr. 1991, pp. 70-73.
"USITT Goes Silicon", Karl G. Ruling, Lighting Dimensions magazine, vol. XIV, No. 6, Sep. 1990, pp. 100-102.
"USITT's Milwaukee Mecca", Light & Sound International magazine, May 1990, pp. 59-60.
Bayview Technology Group, Inc., "Quiet One" data sheet, 1990.
Entertainment Technology, Inc., "ET Intellligence", vol. 1, No. 1, Nov./Dec. 1992.
"Using VMOS for Direct and Reverse Phase Control", C.F. Christansen, M. Benedetti, Rev. Telegr. Electron (Argentina), vol. 69, No. 819 pp. 499-503 (Jun. 1981).
"Power FET Controlled Dimmer for Incandescent Lamps" C.F. Christiansen, M. Benedetti, IEEE Trans. Ind. Appl. (USA) vol. 1A-19, No. 3, pt. 1, pp. 323-327 (May-Jun. 1983).
"Bright New World?--Part III", M. Callahan, Lighting Dimensions magazine, vol. VII, No. 3, Jun. 1983, pp. 35-42.
TBA Technology, Inc., "Magic Lantern, The Low-Voltage Solution"brochure, undated.
Lighting Methods, Inc., L86/I5M data sheet, undated.
Electronics Diversified, Inc., "Problem/Solution" advertisement, United States Institute of Theatre Technology TD&T publication, Winter 1991, vol. XXVII, No. 1, p. 22.
Electronics Diversified, Inc., "Omega", Theatre Crafts Directory, Jun./Jul. 1988, vol. 22, No. 6, p. 69.
Comprehensive Video Supply, Inc., IR-1000 Dimmer listing, Lighting Dimensions 1985/86 Buyers Guide & Directory, Sep. 1, 1985, vol. IX, No. 5, p. 151.
"Product Report Union Connector's SU-1/DIGI-1", reprinted from Theatre Crafts magazine, May 1984.
Union Connector Co., Inc., Series 2400 Wireless Remote Control Stage Lighting System data sheet, 1984.
"Skirpan Design Fills TV Gap", reprinted from TV Technology, Aug. 1984.
Union Connector Company, Inc., Unitrol Dimming System brochure, 1986.
"Power Supply Aspects of Semiconductor Equipment". H.A. Gauper, Jr., J.D. Harden, Jr., A.M. McQuarrie, IEEE Spectrum (USA), vol. 8, No. 10, pp. 32-43, (Oct. 1971).
"Lamp Acoustical Noise and the Reverse Phase Control Dimmer", R.M. Burkhart, R.W. Burtness, 1971 Sixth Annual Meeting of the IEEE Industry and General Applications Group, Cleveland, Ohio, USA, Oct. 18-21, 1971 (New York, USA; IEEE 1971) pp. 949-966.
"Lamp Acoustical Noise and the Reverse Phase Control Dimmer", R.M. Burkhart, R.W. Burtness, IEEE Trans. Ind. Appl. (USA), vol. 1A-8, No. 1, pp. 84-88, (Jan.-Feb. 1972).
"Reverse Phase Control Dimmer for Incandescent Lighting", R.M. Burkhart, D.L. Ostrodka, Industrial Applications Society IEE-IAS Annual Meeting, Toronto, Ontario, Canada, 1-5, Oct. 1978 (New York, USA:IEEE 1978) pp. 614-617.
"Reverse Phase Control Dimmer for Incandescent Lighting", R.M. Burkhart, D.L. Ostrodka, IEEE Trans. Ind. Appl. (USA), vol. 1A-5, No. 5, pp. 579-583, (Sep.-Oct. 1979).
Electro-Controls, Inc., QD.TM. Series Dimmer brochure, undated.
Strand Lighting, Inc., Lightboard XP/DC90 Dimmer brochure, undated Vari-Lite, Inc., VL3 Wash Luminaire data sheet, 1987.
"Stage Lighting and the State of the Art in Twenty Years", J.F. Rubin, Lighting Dimensions magazine, vol. VII, No. 1, Mar. 1983, pp. 52-60.
"Bright New World? Tour System Design for the 1980s", M. Callahan, Lighting Dimensions magazine, vol. VII, Mar. 1983, pp. 62-73.
"Dimming and Lighting Control . . . State of What Art?", J.M. Good III, International Technical Conference, Theatre, Television, and Film Lighting, Committee of Illuminating Engineering Society, 5 Oct. 1987, Montreal, Quebec, Canada.
Theatre Crafts magazine, vol. 20, No. 8, Oct. 1986, p. 14.
Production Arts Lighting, Inc., Model 96-2400 High Density Dimmer Rack data sheet, 83-V-6.
"Dimming Controls Provide Stage Production Sparkle", M. O'Neal, Contractor's Electrical Engineering magazine, vol. 39, No. 4, Apr. 1987, pp. 46-48.
"The ET Dimmer Test", John Huntington, Lighting Dimensions magazine, vol. XV, No. 7, Oct. 1991, pp. 94-105.
Callahan Michael
Chester John K.
Goddard Robert M.
Han Y. J.
Wong Peter S.
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