Patents by Inventor Franz Bracha

Franz Bracha 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).

  • Blocking protection arrangement for electronically commutated DC motors
    Patent number: 4654567
    Abstract: The blocking protection arrangement includes a first transistor whose emitter-collector path lies in the base voltage supply of second and third switching transistors performing commutation. The first transistor receives its base voltage from a self-induction voltage of a stator winding. In the event of a blocking of a motor, this voltage is missing, so that the first transistor is rendered nonconductive.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: March 31, 1987
    Assignee: Standard Elektrik Lorenz Aktiengesellschaft
    Inventor: Franz Bracha