| Abstract |
Two new schemes for the on-line calculation of both the rotor time constant and the magnetising inductance of a vector controlled induction motor are presented. Both rely only on the premeasured values of stator resistance and total leakage inductance measured at start up, and allow the user to assess the operation of the drive for various flux / torque levels. These schemes have been devised as part of a self-commissioning package for an induction motor drive, but can also be used as background adaption techniques for a fully commissioned drive. The accuracy of the schemes is verified by measurements of the airgap flux using sensing coils mounted within the machine, and by comparison with the 'Reactive Power' method of identification. |
