Power conversion device
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United States of America Patent
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Nov 24, 2015
Grant Date -
Aug 14, 2014
app pub date -
Sep 6, 2012
filing date -
Sep 6, 2011
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Abstract
An electric power conversion device comprises a conversion circuit having bi-directionally switchable plural pairs of switching elements connected to respective phases and converting an inputted AC power into an AC electric power. A first switching time is calculated using detected voltages detected by voltage sensors and an output command value. A second switching time is calculated using a carrier and the calculated first switching time. The second switching time is such that, in one period of the alternating current electric power outputted from the conversion circuit, the second switching time included in a first half period of the one period is equal to the second switching time included in a second half period of the one period.
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