Patents by Inventor Tetsuhiro Fujimoto

Tetsuhiro Fujimoto 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).

  • Electric motor control system, series hybrid vehicle, electric motor control apparatus, and electric motor control method
    Patent number: 7888894
    Abstract: An electric motor control system including a generator, an AC motor, a power converter for driving the AC motor using a DC output voltage of the generator, and an electric motor controller for controlling the power converter. The electric motor controller controls the power converter by predicting a change in the DC voltage.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: February 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Naoshi Sugawara, Tetsuhiro Fujimoto, Yasuhiro Kiyofuji, Keizo Shimada, Akira Kikuchi, Kazuhiro Imaie
  • ELECTRIC MOTOR CONTROL SYSTEM, SERIES HYBRID VEHICLE, ELECTRIC MOTOR CONTROL APPARATUS, AND ELECTRIC MOTOR CONTROL METHOD
    Publication number: 20080179122
    Abstract: An electric motor control system including a generator, an AC motor, a power converter for driving the AC motor using a DC output voltage of the generator, and an electric motor controller for controlling the power converter. The electric motor controller controls the power converter by predicting a change in the DC voltage.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 31, 2008
    Inventors: Naoshi SUGAWARA, Tetsuhiro Fujimoto, Yasuhiro Kiyofuji, Keizo Shimada, Akira Kikuchi, Kazuhiro Imaie