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    Co-fired ceramic inductors with variable inductance, and voltage regulator having same

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    7638988.pdf (675.5Kb)
    Downloads: 45
    Publication Date
    2009-12-29
    Filing Date
    2006-02-21
    Inventor
    Lim, Michele H.
    van Wyk, Jacobus Daniel
    Metadata
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    Abstract
    Ceramic inductors are made from stacked sheets of co-fired ceramic. At least one of the ceramic sheets has a slot with a conductor disposed in the slot. The conductor has a thickness equal to a thickness of the ceramic sheet containing the slot. The conductor has a large thickness (compared to prior art co-fired ceramic inductors) and therefore can carry large currents. The present ceramic inductor can be used in power electronics applications due to the ability to carry large currents. The present ceramic inductor preferably has an inductance that decreases with increasing current. A decreasing inductance characteristic tends to increase energy efficiency in a voltage regulator when the inductor is used as an output inductor. Specifically, the variable inductance tends to substantially increase energy efficiency at low current loads without adversely affecting efficiency at high loads.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Patent Number
    7638988
    Application Number
    11357424
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/88/389/076/0.pdf
    Primary/U.S. Class
    323/222
    Other/U.S. Class
    323/284
    323/285
    323/355
    CPC Class
    H01F17/0033
    H01F41/043
    H01F38/42
    H01F2017/002
    H02M3/155
    Y10T29/4902
    Y10T29/49071
    Y10T29/49073
    Y10T29/49075
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72624
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    • Virginia Tech Patents [620]

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