| 摘要 |
PURPOSE:To prevent an overcurrent from flowing to an electronic part even when a rotational shaft is locked by applying an automatic gain regulator for controlling a servo command value. CONSTITUTION:The rotating speed obtained by the rotation of an electronic motor is converted by a frequency generator 3 into frequency, and the difference between the frequency FG and a set frequency FS is inputted to a servo circuit 1 for outputting a control signal to a drive circuit 2. An automatic gain regulator 4 outputs a servo command P when the value of a power source voltage Vee rises higher than a reference voltage Vref. Since the gain of the circuit 1 is dropped by the command P, the output of the circuit 1 is eventually controlled to the same amplitude as that when the power source voltage Vee is rated value. |
