| 摘要 |
The control circuit comprises a driving stage which applies a variable input signal to the d.c. motor. A nominal speed generator determines the motor's nominal speed. A speed detector stage measures the motor's armature terminal voltage as the actual speed signal. A speed control amplifier amplifies the difference signal between the nominal speed signal from the nominal signal generator and the actual speed signal, and applies it to the driving stage. A feed-back circuit applies a signal proportional to the motor torque to the speed control amplifier. |
