| 摘要 |
PURPOSE:To accurately control a vector which is not affected by the temperature of an induction motor by indirectly calculating a generated torque by the calculation with the detected value, and correcting the torque reference with the result. CONSTITUTION:A generated torque calculation correcting circuit 50 inputs a current 51 from the primary current detector CTV of a motor, similarly a voltage 52 from a voltage detector 53, a rotating speed SFB from a speed detector and a torque reference T* from a speed controller 3. The current 51, and voltage 52 and the speed SFB are input to a generated torque calculator 54, which calculates the generated torque, the output is compared with the reference T*, and the difference is applied to a torque controller 55. The output of the controller 55 is added to the reference T* as a correction signal 56. The added torque reference T, REF is input to a function generator 6. |
