| 摘要 |
In the case of a method for state control of a synchronous machine outside the starting region, the object exists of supplying the invertor on the machine side from a DC source without it being necessary to measure the rotor displacement angle. This is achieved in that the control apparatus for predetermining the invertor control angle alpha is synchronised with the stator currents (ISact) of the synchronous machine. The control angle alpha , which, ignoring the current overlap caused by commutation, corresponds, except for a constant, to the phase-shift angle phi between the stator current and voltage ( alpha = pi - phi ), is predetermined by a state controller. Said state controller determines a control variable phi , which is connected to the input of the control apparatus, as a function of the three selected state variables of the system, the "real current", "reactive current" and "capacitor voltage". <IMAGE> |
