Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-06-28
2010-11-30
Leung, Quyen (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C361S144000
Reexamination Certificate
active
07843098
ABSTRACT:
A method for operating an electromotive drive of a textile machine, comprising a contactlessly mounted rotor and catch bearings. The rotor rests on one catch bearing prior to initial operation, and is spaced therefrom by an air gap during stationary operation. A control device allows the rotor to be held in a force-free floating state during stationary operation. The method executes the following steps: (a) inputting an output signal from the control device for maintaining the force-free floating state during operation; (b) calculating the air gap by evaluating the output signal; (c) comparing the calculated value with predetermined limit values; and (d) deactuating the drive when the limit values are passed. The control device comprises a position sensor with at least one sensor coil, at least one actuator coil, a position controller and an integrator, at which the output signal is obtained to determine the air gap.
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Coenen Norbert
Linke Marco
Johnson Eric
K & L Gates LLP
Leung Quyen
Oerlikon Textile GmbH & Co. KG
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