Patents by Inventor Takayoshi Matsuo

Takayoshi Matsuo 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).

  • Motor drive with voltage-accurate inverter
    Publication number: 20050046380
    Abstract: Improved voltage stiffness in the output voltage of an inverter used for a motor drive is obtained by a minor voltage feedback loop connecting the output of the inverter to a three-phase input in a vector domain.
    Type: Application
    Filed: August 29, 2003
    Publication date: March 3, 2005
    Inventor: Takayoshi Matsuo
  • Motor Controller
    Publication number: 20040257027
    Abstract: A motor controller is provided.
    Type: Application
    Filed: June 20, 2003
    Publication date: December 23, 2004
    Inventors: Takayoshi Matsuo, Satoshi Tanabe, Masazumi Yoshino
  • Control unit for non-circulating current type cycloconverter
    Patent number: 4792741
    Abstract: The invention relates to a control unit to control a continuous cycloconverter of the non-circulating current type which performs frequency conversion of an AC power source using a semiconductor element a to perform commutation by the AC power source and variable speed operation of an AC motor.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: December 20, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takayoshi Matsuo, Keiu Kawasaki
  • Converting apparatus and commutation control method therefor
    Patent number: 4758939
    Abstract: An improvement in a commutation control method or a control circuit for a converter comprising a plurality of converter units connected in cascade, which is provided with a circuit which maintains a phase control angle of each converter unit in an about constant angular difference within a range of a specified converter output, thereby enabling precision output control, reduction of the ripple in a delivered current to a load, and an improvement in power factor of an input fundamental wave in comparison with the symmetric control.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: July 19, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takayoshi Matsuo, Keiu Kawasaki