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

Claim 3:
4. 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 the adaptive filter comprises a recursive least squares algorithm, estimating the electric resistance of the stator coil and connection wires on the basis of an adaptive filter, the measured electric voltage and the intensity of the measured current comprises implementing the recursive least squares algorithm in order to define an affine relationship between the measured voltage and current intensity and the estimated electric resistance and a measurement bias of at least one of the measured values.