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    Zero-voltage-transition (ZVT) 3-phase PWM voltage link converters

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    5574636.pdf (915.3Kb)
    Downloads: 216
    Publication Date
    1996-11-12
    Filing Date
    1994-09-09
    Inventor
    Lee, Fred C.
    Mao, Hengchun
    Metadata
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    Abstract
    An improved zero voltage transition (ZVT) pulse width modulation (PWM) link converter is provided which introduces a space vector modulation scheme and an auxiliary circuit which includes a commutation power supply or special switch arrangement used to discharge resonant inductor currents to zero and to recover commutation energy. In an alternate embodiment, an improved ZVT PWM link converter provides an auxiliary switch for each main switch in the converter to achieve ZVT. The novel ZVT converters provide zero-voltage switching without increasing switching action of the main switches. In this way, the advantages of PWM control is maintained. Conduction loss, turn-off losses, and voltage stress of the main switches are the same as in conventional PWM converters, but the dominant turn-on losses are eliminated, so total power losses are minimized.
    Assignee
    Center for Innovative Technology
    Virginia Polytechnic Institute and State University
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    5574636
    Application Number
    8304661
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/36/746/055/0.pdf
    Primary/U.S. Class
    363/132
    Other/U.S. Class
    363/40
    363/138
    CPC Class
    H02M5/4585
    H02M7/4826
    Y02B70/145
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72325
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