Patents by Inventor Hisanori Shibata

Hisanori Shibata 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 device and electric vehicle thereof
    Patent number: 7057361
    Abstract: In a discharge control section of an inverter control device, when the connection of the battery and the smoothing capacitor is disconnected by means of a contactor, the charge accumulated on the smoothing capacitor is discharged by applying high-frequency voltage to the stator windings of the motor by controlling the main inverter circuit.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: June 6, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeshi Kitahata, Hisanori Shibata, Yoshinobu Nakamura, Motoyasu Mochizuki, Yosuke Nakazawa, Yoshinori Sugimoto, Hiroaki Nakashima
  • Inverter control device and electric vehicle thereof
    Publication number: 20040008530
    Abstract: In a discharge control section of an inverter control device, when the connection of the battery and the smoothing capacitor is disconnected by means of a contactor, the charge accumulated on the smoothing capacitor is discharged by applying high-frequency voltage to the stator windings of the motor by controlling the main inverter circuit.
    Type: Application
    Filed: June 3, 2003
    Publication date: January 15, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takeshi Kitahata, Hisanori Shibata, Yoshinobu Nakamura, Motoyasu Mochizuki, Yosuke Nakazawa, Yoshinori Sugimoto, Hiroaki Nakashima
  • Power conversion device
    Patent number: 6058037
    Abstract: Reflux diode 5u.about.5w and 5x.about.5z are in anti-parallel connected to MOSFET 4u.about.4w and 4x.about.4z. When MOSFET 4u.about.4w and 4x.about.4z are turned OFF, an electric current flows in a forward direction to reflux diode 5u.about.5w and 5x.about.5z. In the case of this construction, when for example reflux diode 5u disconnects, a small inverse voltage is applied from inverse voltage applied circuit 7 to reflux diode 5u. For this reason, as the inverse recovery of reflux diode 5u is produced by low voltage direct current power source 8 of inverse voltage applied circuit 7, loss occurring at reflux diode 5u is reduced.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: May 2, 2000
    Inventors: Hisanori Shibata, Hiroshi Mochikawa