| 摘要 |
A control system, for maintaining an electric motor at a required speed of rotation irrespective of the externally applied load, in which a command input provides a voltage proportional to the desired speed and direction of rotation of the motor and a switching circuit supplies current to the motor as a series of current pulses of constant frequency. The switching circuit is arranged to vary the duration of the pulses of current applied to the motor in response to input signals received from the command input and two negative feed back loops, one feed back loop being arranged to feed back a voltage dependent on the actual velocity of the motor and the other on the acceleration of the motor, of which the following is a Specification. |
