Patent ID: 7919947
Filing Date: 2011-04-05
Classification: D01H,F16C

Abstract:
1. Method for starting an electric machine ( 10 ) with a magnetically mounted rotor ( 20 ), in particular for rotating the spinning cup of an open-end spinning machine, comprising the steps of: (a) magnetically supporting a rotor ( (b) controlling the position of the rotor in an axial direction ( (c) limiting the axial positioning of the rotor via two axial limitation bearings ( (d) activating the actuator system for moving the rotor from the first axial end position, (e) when moving the rotor from the first end position, comparing a system variable with an associated reference value, (f) moving the rotor ( (g) activating the actuator system for moving the rotor from the second axial end position, (h) when moving the rotor from the second end position, comparing a system variable with an associated reference value, and (i) generating a fault signal in the event of a previously established deviation of a system variable from an associated reference value.