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    Self-oscillating electronic discharge lamp ballast with dimming control

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    6696803.pdf (699.1Kb)
    Downloads: 86
    Publication Date
    2004-02-24
    Filing Date
    2001-12-14
    Inventor
    Lee, Fred C.
    Tao, Fengfeng
    Metadata
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    Abstract
    A simplified electronic ballast for a discharge lamp which provides dimming by control of inverter frequency through modulation of magnetizing current in a transformer such that the switching frequency is made substantially independent of the load presented. The principle of frequency control in a manner independent of the load is extendable to other types of loads and power supplies and converters to regulate power coupled to the load. Clamping capacitors are used to replace other clamping circuits in order to allow current injection to be controlled by a simple variable voltage while frequency control by current injection provides enhanced circuit performance.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    6696803
    Application Number
    10014800
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/03/968/066/0.pdf
    Primary/U.S. Class
    315/291
    Other/U.S. Class
    315/224
    315/307
    CPC Class
    H05B41/2827
    H05B41/3925
    Y02B20/185
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72483
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    • Virginia Tech Patents [685]

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