| 摘要 |
PURPOSE:To eliminate the delay in the time schedule such as control starting delay or the like by providing a field current coincident detector. CONSTITUTION:A field current Ifx as the output signal of a main circuit current detector 13 and the output of a field reference setter 5 are inputted to a field current coincidence detector 19 to detect the set field reference value is equal to field current reference, and a coincidence signal OPX is outputted to a control circuit 16. When a field current coincidence signal OPX becomes ON, a speed reference conversion switch OP is closed, and the output signal of the speed reference setter 1 is applied to a speed controller 2. When a moment torque current reference is risen at the time as the field current Ifx coincides with the set field reference value, the adverse influence of the operation starting delay to the time schedule and unstable control of predicting operation can be eliminated. |
