Patents by Inventor Kazuo Nagatake

Kazuo Nagatake 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).

  • Car motor driving apparatus
    Patent number: 6642679
    Abstract: In a car body provided with a battery with a low output voltage of 12 V, a step-up circuit unit is connected between the battery and an electromechanical energy converting section. In a car provided with a battery with a high output voltage of 36 V, the battery is connected directly to the electromechanical energy converting section.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: November 4, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuo Nagatake, Tsuyoshi Shinohara, Isao Kishimoto, Masami Hirata
  • Control device for permanent magnet motor serving as both engine starter and generator in motor vehicle
    Patent number: 6590360
    Abstract: A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: July 8, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masami Hirata, Tsuyoshi Shinohara, Kyouichi Okada, Isao Kishimoto, Kazuo Nagatake
  • Car motor driving apparatus
    Publication number: 20020014868
    Abstract: In a car body provided with a battery with a low output voltage of 12 V, a step-up circuit unit is connected between the battery and an electromechanical energy converting section. In a car provided with a battery with a high output voltage of 36 V, the battery is connected directly to the electromechanical energy converting section.
    Type: Application
    Filed: July 19, 2001
    Publication date: February 7, 2002
    Inventors: Kazuo Nagatake, Tsuyoshi Shinohara, Isao Kishimoto, Masami Hirata
  • Control device for permanent magnet motor serving as both engine starter and generator in motor vehicle
    Publication number: 20010026141
    Abstract: A control device for a permanent magnet motor serving as both a starter for an engine and a generator in a motor vehicle is disclosed.
    Type: Application
    Filed: March 29, 2001
    Publication date: October 4, 2001
    Inventors: Masami Hirata, Tsuyoshi Shinohara, Kyouichi Okada, Isao Kishimoto, Kazuo Nagatake
  • Neutral-point-clamped PWM inverter
    Patent number: 4443841
    Abstract: A neutral-point-clamped PWM inverter arrangement for reducing output harmonic content. The arrangement includes a DC power source circuit having positive, negative and neutral terminals, a first group of switching elements connected at one end to the power source positive terminal, a second group of switching elements connected at one end to the power source negative terminal and at the other end to the corresponding switching elements of the first group, respectively, a third group of switching elements connected between the power source neutral terminal and the junctions of the switching elements of the first group and the second group, and a fourth group of switching elements connected in parallel with corresponding switching elements of the third group, respectively. Output terminals are connected to points where a switching element of the first group is connected to the corresponding ones of the second group to provide phase output voltages.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: April 17, 1984
    Inventors: Wataru Mikami, Kazuo Nagatake, Takuo Ono