POWER CONVERTER CONTROL DEVICE AND CONTROL METHOD

WIPO Patent Application WO/2023/243451

A1

In order to reduce an error of an output current detection value caused by the influence of a delay time of an output current in an input circuit and an operation delay time of a semiconductor switching element, and to enhance responsiveness of current feedback control, the present invention comprises: a current detection means that detects an output current of a power convertor for converting DC power into AC power by using a semiconductor switching element; a current control means that generates an output voltage command through current control based on the output of the current detection means; a PWM control means that outputs a gate command with respect to the semiconductor switching element on the basis of the output voltage command; and a gate driver circuit that generates, with an operation delay, a gate signal for on-off driving the semiconductor switching element from the gate command. The current detection means has a current integration unit that calculates a current integrated value in an integration time period for each sampling cycle by using an output of a current sensor as an input signal. The current control means performs current control on the basis of the current integrated value. The current detection means, the current control means, and the PWM control means operate in synchronization with one another.

KOJIMA TETSUO (JP)
IKIMI TAKASHI (JP)
KURIHARA NAOKI (JP)
NAKAYAMA HIRO (JP)

PCT/JP2023/020695

December 21, 2023

June 02, 2023

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HITACHI LTD (JP)

H02M7/48

JP2012110074A	2012-06-07
JP2006238637A	2006-09-07
JP2017127046A	2017-07-20
JP2019161720A	2019-09-19
JP2018113754A	2018-07-19

DAI-ICHI INTERNATIONAL PATENT OFFICE, P.C. (JP)

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