Method and apparatus for providing selectable output voltages
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United States of America Patent
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Oct 12, 2010
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N/A
app pub date -
May 19, 2009
filing date -
Jan 12, 2000
priority date (Note) -
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Abstract
A transformer is provided along with a combination of bridging tap-changers to provide a wide range of selectable output voltages in discrete, relatively small voltage steps where the highest voltage is more than double the lowest output voltage. Relatively inexpensive, off-the-shelf, bridging tap-changers are utilized in conjunction with transformer winding schemes to provide a low winding loss ratio.
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