Patents by Inventor Christer Thornell-Pers

Christer Thornell-Pers 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).

  • Drive system for a tap changer
    Patent number: 8013555
    Abstract: A drive system for operation of a tap changer for voltage regulation of a transformer on load. An electric motor is connectible to a movable part of the tap changer for moving the movable part for carrying out a tap change operation. An electric converter connects an electric power supply to the electric motor. A control arrangement is adapted to control the electric converter for controlling the operation of the motor and by that of the tap changer.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: September 6, 2011
    Assignee: ABB Research Ltd.
    Inventor: Christer Thornell-Pers