Patents by Inventor Kyoji Matsumura

Kyoji Matsumura 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).

  • Vehicle electrical power supply system for supplying power to a high power load
    Patent number: 7176659
    Abstract: The present invention provides an electrical power supply system for an automotive vehicle with high reliability and small size in which an adequate power is supplied to both a high power load like a blower motor and a conventional load like a battery by using a conventional alternator. The power supply system for the automotive vehicle comprises: an alternator with an armature winding and a field coil, a stepping-up DC/DC converter for applying a stepped up voltage of a battery to the field coil, a regulator for controlling an output voltage of the alternator by changing the output voltage in response to a rotating speed for supplying a power to the high power load, and for controlling the output voltage to be a charging voltage of the battery.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: February 13, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshihito Asao, Hirofumi Watanabe, Katsumi Adachi, Shirou Iwatani, Kyoji Matsumura, Tuneji Goda
  • Electrical power supply system for a vehicle
    Publication number: 20020027425
    Abstract: The present invention provides an electrical power supply system for an automotive vehicle with high reliability and small size in which an adequate power is supplied to both a high power load like a blower motor and a conventional load like a battery by using a conventional alternator.
    Type: Application
    Filed: March 21, 2001
    Publication date: March 7, 2002
    Inventors: Yoshihito Asao, Hirofumi Watanabe, Katsumi Adachi, Shirou Iwatani, Kyoji Matsumura, Tuneji Goda
  • Control apparatus for AC generator of motor vehicle
    Patent number: 5686819
    Abstract: A control apparatus for an AC generator of a motor vehicle of high reliability having substantially no adverse influence to an onboard battery and an onboard high-voltage load by suppressing to a passible minimum variation of a regulating voltage which may occur as contacts of a detection voltage change-over switch are degraded. An AC generator of a motor vehicle includes a rectifier circuit for rectifying an output of the AC generator including a field coil, an output change-over switch for changing over an output of the rectifier circuit to either one of a battery and a high-voltage electric load mounted on the motor vehicle, and a voltage regulator for regulating an exciting current supplied to the field coil in dependence on a terminal voltage of the battery as detected on a charging line connected to the battery by way of the output change-over switch upon charging of the battery from the output of the rectifier circuit, to thereby regulate the output voltage of the AC generator.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: November 11, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shiro Iwatani, Kyoji Matsumura