| 摘要 |
PURPOSE:To increase the response speed of a control system by using a transistor as an output element for driving a motor and controlling the transistor by the pulse signal subjected to a pulse width modulation according to a speed deviation. CONSTITUTION:If the speed of a motor 1 is lower than the set speed of a speed setter 5, a deviation signal of, for example, a positive polarity, is outputted from an error amplifier 10 and is impressed to the 1st comparators 11, 12. The output from the comparator 11 is impressed to a flip-flop 17, the output whereof is impressed, via the output terminal 19-1 of a gate circuit 19 and an interlock circuit 4, to a driving transistor 2, then the Tr2 turns on and the motor 1 is accelerated. |
