Power conversion device that can suppress interference between control of input current from an AC power supply and voltage control for a DC capacitor

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United States of America Patent

PATENT NO 11817768
APP PUB NO 20210344277A1
SERIAL NO

17283255

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Abstract

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Provided is a power conversion device that can suppress interference between control of input current from an AC power supply and voltage control for a DC capacitor to perform both the controls with high accuracy, and can reduce the capacitance and size of the DC capacitor. A power conversion circuit includes a rectification bridge circuit, a leg circuit having upper and lower legs connected in series, a DC capacitor, a smoothing capacitor, and a reactor. A control circuit performs PWM control of the leg circuit by generating a duty cycle so as to control a voltage of the DC capacitor while controlling an input current from an AC power supply, in a control cycle. When the duty cycle is generated, a sum of duty cycles is made constant in one cycle for each leg.

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Patent Owner(s)

  • MITSUBISHI ELECTRIC CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Takahara, Takaaki Tokyo, JP 37 181
Toyoda, Hajime Tokyo, JP 9 9

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