Mitsubishi Denki Kabushiki Kaisha

Ichiro Minejima

Hiroaki Suzuki

Makoto Tanikawa

Hitoshi Tanifuji

Yoshihiro Iwasaki

Isao Kawasaki

Yoshihiko Kikkawa

Takahiro Ishigami

Provided are, a converter section ( ) which converts a commercial AC voltage (V ) into a DC voltage (V ); an inverter section ( ) which converts the DC voltage (V ) into an output AC voltage (V ) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (V ) to a compressor motor ( ). Further, an instantaneous DC voltage detecting section ( ) detects an instantaneous DC voltage (V ); and an arithmetic processing section ( ) corrects the PWM width so as to maintain the output AC voltage (V ) at a desired value following the variation in the instantaneous DC voltage (V ). It is possible to operate a compressor motor ( ) in an optimum state of load characteristics and efficiency.

Inverter control apparatus

Growing community of inventors

Tokyo, Japan

Ichiro Minejima