| 摘要 |
PURPOSE:To enable to control an induction motor with rapid response by inertia running without stopping an inverter. CONSTITUTION:The output of a frequency/voltage converter 10 which converts the rotor frequency fr of an induction motor into a DC voltage is inputted to a speed deviation detector 13 and an adder 17. The output of a speed signal pattern circuit 11 which converts a speed command SP into a DC voltage is inputted to the detector 13. The output of the detector 13 is inputted through the first slip frequency function generator 14 to a low priority circuit 16. The output of a current limiting value pattern circuit 12 which converts a current limiting value command corresponding to the notch of an operation unit into a DC voltage according to the discrimination of the condition of a power drive operation and a regenerative operation is inputted through the second slip frequency function generator 15 to the circuit 16. The output of the circuit 16 is inputted to the adder 17, and the output of the adder 17 is inputted to a voltage/frequency converter 18 as a frequency output circuit which outputs an inverter frequency command. |
