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Center for Power Electronics Systems

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https://hdl.handle.net/10919/111742

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Browsing Center for Power Electronics Systems by Subject "1/1"

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    Optimal trajectory control for LLC resonant converter for LED PWM dimming
    (United States Patent and Trademark Office, 2016-03-01)
    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.
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    Optimal trajectory control for LLC resonant converter for soft start-up
    (United States Patent and Trademark Office, 2016-04-19)
    By setting switching instants of a switching circuit of a resonant power converter based on current in a resonant circuit reaching a current limit of a current limitation band, soft start-up of the power converter can be achieved to avoid or limit electrical stress with full control over a trade-off between time required to settle to a full load steady-state mode of operation and the amount of electrical stress permitted while soft start up switching frequency is automatically optimized.