Patents by Inventor Dirk Van Riesen

Dirk Van Riesen 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).

  • Permanent-magnet-excited electric motor with heating device, and operating method
    Patent number: 9160206
    Abstract: The aim of the invention is to provide an electric motor which has a high torque at low rotation speeds and a high power at high rotation speeds. The invention therefore proposes an electric motor with permanent-magnet excitation having a first active part (10), which is fitted with permanent magnets (11), and a second active part (10), which can be moved in relation to the first active part (10) by magnetic force of the permanent magnets (11). The electric motor also has a heating device (12) with which the magnetic field of at least one of the permanent magnets (11) can be weakened by heating the permanent magnets as a function of a speed of the first active part (10) in relation to the second active part (8).
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: October 13, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Detlef Potoradi, Rolf Vollmer, Dirk Van Riesen
  • PERMANENT-MAGNET-EXCITED ELECTRIC MOTOR WITH HEATING DEVICE, AND OPERATING METHOD
    Publication number: 20130249340
    Abstract: The aim of the invention is to provide an electric motor which has a high torque at low rotation speeds and a high power at high rotation speeds. The invention therefore proposes an electric motor with permanent-magnet excitation having a first active part (10), which is fitted with permanent magnets (11), and a second active part (10), which can be moved in relation to the first active part (10) by magnetic force of the permanent magnets (11). The electric motor also has a heating device (12) with which the magnetic field of at least one of the permanent magnets (11) can be weakened by heating the permanent magnets as a function of a speed of the first active part (10) in relation to the second active part (8).
    Type: Application
    Filed: November 28, 2011
    Publication date: September 26, 2013
    Inventors: Detlef Potoradi, Rolf Vollmer, Dirk Van Riesen