| 摘要 |
PURPOSE:To control the drive of the servomotor only in one direction by connecting a directional element in parallel with a feedback loop of an operational amplifier. CONSTITUTION:A relay Ry2 is actuated by the forward revolution command or reversal command of the servomotor M, and changes over and connects a switch S2 to a normally-opened terminal NO. A relay Ry1 connects a diode D1 or D2 in parallel with the operational amplifier OP giving the servomotor M output voltage is response to signals F. Accordingly, the drive of the servomotor can be controlled only in the direction because the operational amplifier OP outputs only voltage having predetermined polarity by connecting the diode D1 or D2 in parallel with the operational amplifier OP. |
