INVERTER DEVICE AND INVERTER GENERATOR
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United States of America Patent
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Issued Date -
Nov 6, 2014
app pub date -
Apr 28, 2014
filing date -
May 1, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An inverter device includes a voltage command value output unit that outputs a voltage command value, voltage sensors that detect output voltage from a switching circuit, a Fourier transform unit that performs frequency analysis on the output voltage detected by the respective voltage sensors, and a voltage correction value calculation unit that obtains harmonics with respect to a drive frequency of the switching circuit subjected to the frequency analysis by the Fourier transform unit and obtains a voltage correction coefficients for correcting the voltage command value so as to cancel the harmonics. The voltage correction value calculation unit calculates coefficients each for each degree of the harmonics and determines whether the coefficients converges when calculating the coefficients so as to obtain the voltage correction coefficients based on the coefficients which are determined to converge.
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