Patent ID: 11962258
Assignee: SKF MAGNETIC MECHATRONICS
Field: Mechanical elements (Mechanical engineering)
Classification: CPC H  F  G | IPC H

Claim 2:
3. A method for estimating the temperature of a stator coil of a magnetic suspension bearing of a rotor and which is connected by connection wires to circuits for servo-controlling the position of the rotor, comprising:
measuring the electric voltage at the terminals of the connection wires of the stator coil
measuring the intensity of the current passing through the stator coil;
estimating the electric resistance of the stator coil and of the connection wires based on an adaptive filter, the measured electric voltage and the intensity of the measured current and estimating the temperature of the coil based on the value of the estimated resistance,
wherein estimating the electric resistance of the stator coil and of the connection wires comprises correcting the value of the electric resistance estimated in a closed loop on the basis of a deviation between the intensity of the current passing through the stator coil and the intensity of a current estimated on the basis of the measured voltage and the position of the rotor shaft in the stator of the magnetic bearing, with the value of the estimated electric resistance being equal to the value of the corrected estimated electric resistance when the absolute value of the deviation is less than or equal to a predetermined value.