| 摘要 |
PURPOSE:To make the individual current detector needless by a method wherein multiple motors are controlled converting the deviation signals between speed command and speed feedback into the current feedback value of individual motor. CONSTITUTION:The speed command of a controller 13 and the deviation signal of a speed detector 1 are converted into the current command of a DC motor 3 through a speed adjuster 12. The current command value is almost equivalent to the current value of the motor 3 since said value comprises a current control system making use of the deviation signal from an AC side current detector 7. Besides ACR simulator 16 is provided to detect the current command value as equivalent value to the motor current supplying a load balance system 15 with said current command value. Through these procedures, the load balance may be controlled without constituting the DC side current detector and an insulating amplifier at all. |
