Electric power conversion device
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United States of America Patent
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Feb 7, 2017
Grant Date -
Jun 30, 2016
app pub date -
Sep 2, 2013
filing date -
Dec 12, 2012
priority date (Note) -
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Abstract
An electric power conversion device includes a plurality of cell converters connected in cascade and including main circuits, drive circuits, and self-feeding devices for supplying power to the drive circuits by being supplied with power from the main circuits. The drive circuit is supplied with power via a first feed line from the self-feeding device in the corresponding cell converter, and supplied with power from the self-feeding device in another cell converter via a second feed line on which an insulation input/output circuit is provided. When the self-feeding device is abnormal, the drive circuit is supplied with power from the self-feeding device in the other cell converter, whereby the electric power conversion device continuously provides a desired output.
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