Patent ID: 7843098
Filing Date: 2010-11-30
Classification: D01H,F16C,H02K

Abstract:
1. Method for operating an electromotive drive, in particular a single drive of a textile machine, comprising a contactlessly mounted rotor ( 1 ), catch bearings ( 10 ), wherein the rotor ( 1 ) rests on one of the catch bearings ( 10 ) prior to initial operation of the electromotive drive, and from which the rotor ( 1 ) is spaced apart during stationary operation by a bearing air gap, as well as a control device, which comprises a position sensor ( 11 ) and at least one actuator coil ( 5 ) and which allows the rotor ( 1 ) to be held in a force-free floating state during stationary operation wherein the rotor floats axially about a working point, characterized by the following steps: inputting an output signal (ASI) generated by an integrator ( calculating the bearing air gap by evaluating the output signal (ASI); comparison of the calculated value for the bearing air gap with predeterminable limit values; switching off the electromotive drive when the limit values are passed.