DE3045575

The method of regulating a direct converter fed synchronous machine, uses a rotary speed control from which are obtained the polarity and amplitude of a value corresponding to the stator supply current. This value and a second value are applied to a machine model. The second value is a value obtained from the rotary speed by using a characteristic curve generator or the resulting magnetisation from the voltage and current. The quadrature of these values and their sum by extracting their square roots are determined, and also the result of dividing the first value by the second by successive arc/tan formation of the control angle between imaginary pole voltages and input currents are obtained. The control angle measured against the measured angle is obtained from a desired value former for the three normal sine values shifted by 120 degrees. To evaluate these sine values against the current supply values, a desired value system for the instantaneous values of the three stator currents is used.