Patents by Inventor Hiroyui Yamada

Hiroyui Yamada 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 car controller and control method
    Publication number: 20030085678
    Abstract: The electric car controller is characterized in that evaluation two-phase/three-phase converting means (15) for calculating a three-phase evaluation current indication value is provided in control means, and current detected value from current detecting means (8) and evaluation current indication value are compared with each other by a deviation computing means (17). This result is evaluated by error evaluation means (18), and is sent to target command computing means (10), whereby the operation of a drive apparatus is stopped or continued.
    Type: Application
    Filed: March 28, 2002
    Publication date: May 8, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Hiroyui Yamada, Minoru Kaminaga, Takuma Nomura