| 摘要 |
PURPOSE:To realize stabilized speed control with drooping function by operating an accelerating/decelerating current value based on a speed command value and adding to a load current command value outputted from a speed controller thereby producing a motor current command value. CONSTITUTION:Under a state where a speed command value omega* is constant and a drooping speed command value omegad* matches with a speed detection value omega, a speed controller 7 outputs a load torque current command value IL* corresponding to the load torque of a DC motor 2. At that time, a drooping amount operating unit 9 outputs a drooping amount omegad. When the speed command value omega* is constant, accelerating/decelerating current value Iad is zero and the load torque current command IL* is equal to a current command value I* which is compared with the current detection value I at an adder 4D. A current controller 10 provides a firing control command value corresponding to the difference between the current command value I* and the current detection value I to a gate pulse generator 11. The gate pulse generator 11 provides a gate pulse to a power converter 1 based on the firing control command value in order to control the output voltage of the power converter 1. |
