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    Optimal trajectory control for LLC resonant converter for LED PWM dimming

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    9276480.pdf (1.616Mb)
    Downloads: 139
    Date
    2016-03-01
    Inventor
    Lee, Fred C.
    Ji, Shu
    Feng, Weiyi
    Metadata
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    Abstract
    Pulse width modulation is provided for controlling a resonant power converter, particularly for dimming of light emitting diode arrays without loss of efficiency. Dynamic oscillation due to the beginning of a pulse width modulated pulse burst is limited by shortening of the first and/or last pulse of a pulse bust such that the first pulse of a subsequent pulse burst close to or to connect with a full load steady-state voltage/current trajectory of the power converter. Pulse shortening made be made substantially exact to virtually eliminate dynamic oscillation but substantial reduction in dynamic oscillation is provided if inexact or even performed randomly.
    URI
    http://hdl.handle.net/10919/72772
    Collections
    • Scholarly Works, Center for Power Electronics Systems (CPES) [33]
    • Scholarly Works, Electrical and Computer Engineering [539]
    • Virginia Tech Patents [620]

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