Patents by Inventor Ichiro Minejima

Ichiro Minejima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Inverter control apparatus
    Patent number: 6687139
    Abstract: Provided are, a converter section (30) which converts a commercial AC voltage (VAC) into a DC voltage (VDC); an inverter section (60) which converts the DC voltage (VDC) into an output AC voltage (VOUT) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (VOUT) to a compressor motor (70). Further, an instantaneous DC voltage detecting section (50) detects an instantaneous DC voltage (VDCS); and an arithmetic processing section (100) corrects the PWM width so as to maintain the output AC voltage (VOUT) at a desired value following the variation in the instantaneous DC voltage (VDCS). It is possible to operate a compressor motor (70) in an optimum state of load characteristics and efficiency.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: February 3, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Makoto Tanikawa, Takahiro Ishigami, Yoshihiko Kikkawa, Hitoshi Tanifuji, Yoshihiro Iwasaki, Hiroaki Suzuki, Isao Kawasaki, Ichiro Minejima
  • Inverter control apparatus
    Publication number: 20010036093
    Abstract: Provided are, a converter section (30) which converts a commercial AC voltage (VAC) into a DC voltage (VDC); an inverter section (60) which converts the DC voltage (VDC) into an output AC voltage (VOUT) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (VOUT) to a compressor motor (70). Further, an instantaneous DC voltage detecting section (50) detects an instantaneous DC voltage (VDCS); and an arithmetic processing section (100) corrects the PWM width so as to maintain the output AC voltage (VOUT) at a desired value following the variation in the instantaneous DC voltage (VDCS). It is possible to operate a compressor motor (70) in an optimum state of load characteristics and efficiency.
    Type: Application
    Filed: May 24, 2001
    Publication date: November 1, 2001
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Makoto Tanikawa, Takahiro Ishigami, Yoshihiko Kikkawa, Hitoshi Tanifuji, Yoshihiro Iwasaki, Hiroaki Suzuki, Isao Kawasaki, Ichiro Minejima