Patent ID: 8581462
Filing Date: 2013-11-12
Classification: H02K

Abstract:
1. An electric rotary drive, designed as a bearingless external rotor motor, having a magnetically supported, substantially ring-shaped rotor which is arranged around an inwardly disposed stator, wherein an air gap is provided between the rotor and the stator, wherein the stator is designed as a bearing and drive stator with which the rotation of the rotor can be driven about an axis of rotation and with which the rotor can be magnetically supported, wherein the rotor is radially supported in an actively magnetic manner in the plane perpendicular to the axis of rotation and is supported axially in the direction of the axis of rotation and against tilting in a passively magnetic manner, characterized in that the stator has, at least in its marginal region, a magnetic height which is smaller than the magnetic rotor height of the rotor in its radially inwardly disposed region.