Power conversion device
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United States of America Patent
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Sep 12, 2017
Issued Date -
N/A
app pub date -
Dec 30, 2016
filing date -
Jan 9, 2014
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Abstract
A power conversion device converts three-phase AC power into DC power by two-arm PWM modulation control and includes a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein; a voltage-command generation unit that generates a voltage command value for the main circuit; a current detection unit that detects at least one of output currents of the main circuit; a power-factor calculation unit that calculates a power factor on the basis of the output current and the voltage command value; a carrier-signal generation unit that generates a carrier signal of a frequency corresponding to the power factor; and a PWM-signal generation unit 6 that compares the voltage command value and the carrier signal to generate a PWM signal that executes switching control on the switching elements.
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