| 摘要 |
PROBLEM TO BE SOLVED: To reduce difference between a torque command value and actual output torque in a drive control of an AC motor. SOLUTION: A torque detecting means 14 is constituted by using a torque sensor or the like, and torque feedback control is performed. A voltage phase ψis set so as to reduce a torque deviation ΔT, and the range of ψ is restricted in a specified phase range. As a result, actual output torque can be made to approach a torque command value, without breaking control. |
