Patents by Inventor Klaus Hirschfelder

Klaus Hirschfelder 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 drive control
    Patent number: 6541934
    Abstract: In a method for controlling an electric drive, a controlled variable is adjusted to a desired value. To protect the electric drive, the controlled variable is first adjusted to the desired value in a precise manner. Thereafter, the control operation is interrupted, AND the difference between the controlled variable and the desired value is check continuously to see whether it exceed a preset threshold. Interruption of the control operation is terminated when the threshold has been reached or exceeded.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: April 1, 2003
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Klaus Hirschfelder, Christian Schmidt