| 摘要 |
PURPOSE:To eliminate a tachometer generator by using as a speed feedback signal an armature voltage and employing a function generator which outputs a signal approximate to the speed vs. field current characteristic. CONSTITUTION:The output voltage of a speed setter 1 is applied through a limiter 2 and a constant acceleration instructing unit 3 to a limiter 4 and a function generator 14. A speed regulator 5 receives a deviation signal between the output of the limiter 4 and a signal corresponding to the armature voltage from an insulation detector 11 and outputs a current command signal. A current regulator 6 controls a thyristor 9 in response to the deviation signal between the current command signal and the armature current from a current transformer 12. On the other hand, the generator 14 produces a field current command in response to the armature speed vs. field current characteristic. A field regulator 15 controls a thyristor 18 in response to the deviation between the field current command and the field current from a current transformer 20. |
