| 摘要 |
PURPOSE:To remove the influence of a variation in a load torque by stopping the correcting operation of a correcting circuit when the torque varies. CONSTITUTION:A speed controller 6 calculates the command value of an armature current in response to a speed deviation, and a current controller 7 controls a variable voltage power converter 4 by a current deviation. A parameter decider 12 connects a load machine to decide the varying parameter by the outputs of a current detector 3 and a speed detector 2. A correcting circuit 13 corrects the gain constant of the controller 6 on the basis of the output of a parameter decider 11. A controller 13 operates to correct in a correcting circuit 12 only when the absolute value of the deviation exceeds the maximum value of the absolute value of the deviation predicted when the absolute value of the deviation occurs due to a load torque variation. |
