Patent ID: 8604745

Claim:
A method for the identification without shaft encoder of mechanical characteristic quantities of a three-phase asynchronous motor ( 09 ) comprising at least the steps: impressing a constant voltage U 1α , in α axial direction in order to generate a constant magnetic flux; supplying a test signal voltage U 1β in β axial direction of the asynchronous motor ( 09 ), whereby the α axial direction remains supplied with constant current; measuring a measuring signal current I 1β in β stator axial direction of the asynchronous motor ( 09 ); identifying mechanical characteristic quantities of the asynchronous motor ( 09 ) based on the test signal voltage U 1β and on the measuring signal current I 1β; whereby the supplying of a test signal into the asynchronous motor ( 09 ) takes place in such a manner that the rotor ( 11 ) can execute deflection movements based on the supplying of test signals.