Patent ID: 8129881
Filing Date: 2012-03-06
Classification: B02C,H02K

Abstract:
1. A ring motor as a direct drive for ore mills or rod mills, comprising a stator and a rotor configured as a rotating mill body, wherein the stator has at least two different excitation systems, including a winding system and a permanent magnet system, and the mill body has a toothed structure that electromagnetically interacts with the excitation systems of the stator and thus brings about a rotation of the mill body; wherein the stator is comprised of a plurality of physically distinct stator segments, each having a partial-circle shape and including at least three teeth, each tooth having at least two permanent magnets coupled thereto; wherein the plurality of partial-circle shaped stator segments are arranged adjacent to each other to form a circle shaped stator and wherein each of the stator segments defines separating points, wherein, adjacent ones of the stator segments are mechanically joined together at respective separating points thereof, wherein a pair of adjacent stator segments define a slot between the pair of adjacent stator segments at the separating point between adjacent stator segments; and wherein the winding system comprises tooth coils configured such that respective portions of two different tooth coils are located in the slot defined by the pair adjacent stator segments.