| 摘要 |
1. Method for controlling the magnetic flux of an asynchronous machine which is fed from an inverter with a multi-phase voltage of adjustable frequency and amplitude, and in which the control commands for the inverter are derived from signals representing the stator voltage and the stator frequency, in which arrangement the stator frequency is determined by summing the slip frequency and determined frequency of rotation of the asynchronous machine, characterised in that for achieving a proportional dependence of the magnetic flux in the asynchronous machine on the direct voltage (Ud ) present at the input of the inverter, this direct voltage is used after multiplicative combination with the intermediate circuit current (Id ) and after processing in an output regulator (24), for correcting the command variable, which is in each case supplied, together with the frequency of rotation (fn ) of the asynchrones machine, to two characteristic-curvegenerators (27, 28) for forming the slip frequency (f2 ) and nominal stator current value (I1-* ). |
