| 摘要 |
PROBLEM TO BE SOLVED: To simply enable setting of a mechanical constant necessary for operation and operating an accurate control constant, based on the mechanical constant. SOLUTION: Inverter equipment performs variable speed operation of an AC motor by using V/I control, and a current detector 3 detects a primary current supplied to an AC motor 1. On the basis of the primary current, an excitation component current I0 and a torque component current IT are calculated. An external disturbance component is estimated from the torque component current IT, when the AC motor rotates at a constant speed. By subtracting the estimated value from the torque component current IT when the AC motor is accelerated, so that the influence of the external disturbances is excluded. |
