G - Physics – 01 – R
Patent
G - Physics
01
R
324/17
G01R 27/02 (2006.01) G01R 31/34 (2006.01) H02P 21/10 (2006.01)
Patent
CA 1164047
ABSTRACT OF THE DISCLOSURE Disclosed is a method to detect the rotor resistance of an asyn- chronous machine, wherein a first vector attached to the emf of the machine is determined by computing the emf-vector or the flux vector from the stator voltages and the stator currents; wherein a flux attached to an arithmetic model circuit is determined, whereas the arithmetic model circuit uses the stator currents and the rotor position of the machine and an adjustable model parameter for the rotor resistance as basic quantities and imitates the dynamic events leading to the magnetic flux of the machine; wherein a difference of two quantities is determined, wherein the first quantity represents a defining quantity of the first vector attached to the machine and the second quantity represents a respective defining quantity of a second vector derivable from the imitated flux and that the setting of a model parameter is varied until the value of the difference is a minimum, whereas the model parameter corresponding to the minimum of the difference is regarded as the resulting rotor resistance of the machine.
385606
Bayer Karl-Heinz
Blaschke Felix
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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