| 摘要 |
PURPOSE:To perform the torque control of high precision and stable without need of a speed detector and under no influence of the motor constant such as two-point resistance value, by performing a feedback control based on the detected signals of motor voltage and current. CONSTITUTION:A flux/torque current computing element 9 outputs the torque current computing signal S5 and the flux computing signal S6 after inputting the current detected signal S12 and voltage detected signal S13 of a motor 11. The frequency of the motor is controlled by passing through a frequency signal generator 6 the signal S8 into which by a frequency controller 5 the computing signal is amplified as compared with the signal S3 of the ratio between the torque current command signal S1 and the flux command signal S2, and the signal S4 of the ratio between the torque computing signal S5 calculated from the motor voltage and current detected signal and the flux computing signal S6. |
