Patents Assigned to Papst Licencing GmbH
  • Brushless DC drive motor with external rotor for use in disc drives and like devices
    Patent number: 5382853
    Abstract: A brushless DC drive motor with an external rotor has three pole shoes on a substantially ring-shaped stator for each two poles on the rotor. The stator winding is commutated by a three-phase commutation network in such a fashion that first, second and third networks in the stator winding are cyclically connected to an external DC source in accordance with rotor position. Each of the networks comprises at least one stator coil wrapped around a neck of a single corresponding one of the pole shoes.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: January 17, 1995
    Assignee: Papst Licencing GmbH
    Inventors: Johann von der Heide, Rolf Muller, Alfred Merkle