INVERTER HAVING EXTENDED LIFETIME DC-LINK CAPACITORS
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United States of America Patent
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Issued Date -
Jan 30, 2014
app pub date -
Mar 8, 2012
filing date -
Mar 9, 2011
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Abstract
An inverter having extended lifetime DC-link capacitors for use with a DC power source such as a photovoltaic panel is described. The inverter uses a plurality of switchable capacitors to control the voltage across the capacitors. The expected lifetime of the capacitors can be extended by disconnecting unnecessary capacitors from a voltage. The capacitors may be periodically connected to a voltage in order to maintain an oxide dielectric layer of the capacitor.
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