| 摘要 |
PURPOSE:To eliminate speed difference due to a load variation by adding the difference between a speed reference signal and a speed feedback signal to the speed reference signal to apply it to a motor controller. CONSTITUTION:An operational amplifier 2a obtains the difference between a speed reference REF1 and a speed feedback signal FB. This value becomes speed deviation-suspending characteristic due to a load set by speed controlling operational amplifiers 1a, 1b with suspending characteristic. An operational amplifier 2b adds a speed reference REF1 and the output DIF of the amplifier 2a, and supplies a new speed reference REF2 through a polarity inverter 3 and an acceleration/deceleration limiter LA to the operational amplifiers 1a, 1b of motors. Thus, a constant-speed control which is not affected by the influence of the load variation can be performed without losing a load balance controlling function.
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