Patents by Inventor Dieter Poliwczyk

Dieter Poliwczyk 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).

  • MOTOR DRIVE FOR ON-LOAD TAP CHANGER
    Publication number: 20140239859
    Abstract: The invention relates to a motor drive for an on-load tap changer with an electrical DC motor and a braking device for denned braking of this motor. According to the invention, the braking device has a first diode (D1), which, depending on the direction of rotation, is connected in series with or in opposition to the armature winding (AW) of the DC motor. In accordance with a further feature of the invention, the braking device has a second diode (D2), which is connected permanently in parallel with the shunt winding (NW) of the DC motor.
    Type: Application
    Filed: October 18, 2012
    Publication date: August 28, 2014
    Inventor: Dieter Poliwczyk