| 摘要 |
A method for automatic measurement of the ohmic rotor impedance of an asynchronous machine (1) controlled by an inverter (8) while the machine is acted upon by a non-rotating field. The method involves: (1) measuring the ohmic stator impedance, the leakage inductance and the main inductance of the asynchronous machine, (2) supplying a test signal (Usa) formed by a predetermined dc signal with a superimposed ac signal to a phase winding (a) of the asynchronous machine, where the frequency of the ac signal corresponds approximately to the nominal slip frequency of the asynchronous machine (3) measuring the amplitude and the phase of the phase signal resulting from the test signal (4) calculating the ohmic rotor impedance from the measured values according to step 1 and 3.
|
