| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for stake-striking operation for fully utilizing the allowable maximum output of an output system consisting of such output control device as an inverter and an electric motor and for controlling speed at the time of a stable constant-output drive. SOLUTION: A control device has an induction motor 105, an inverter 6, a current detector 13, a resolver 14, a pulse pick-up 15, and a sequencer 12, detects a load torque in the inverter 6, obtains a rotary speed obtained from load torque/rotary speed characteristics according to constant-output drive characteristics based on the detected load torque in the sequencer 12, and limits a speed control command value in the speed control of the inverter 6 using the obtained value. |
