| 摘要 |
A control circuit for adjusting current to a direct current motor that has a free wheeling diode connected in parallel with the armature winding includes a controllable switching element connected in series with the armature winding, a comparator that has a control voltage corresponding to a desired rotational speed of the motor applied to one input of the comparator and an integrating circuit connected to the other input of the comparator. An electronic switch is connected across the integrating circuit, and the output of the comparator controls the controllable switching element and the electronic switch. |
