| 摘要 |
PURPOSE:To perform the torque control of high precision without enlarging a device by detecting the actual torque of a synchronous motor with arithmetic operation based on feedback current, and by using the actual torque for feedback. CONSTITUTION:In a torque compensator 10, the current values Ift, Ivf, Iwf of respective phases are multiplied by the unit vectors eu, ev, ew of the respective phases detected by a detector 5, with multipliers 11U, 11V, 11W, and a torque feedback Tf is added to. The value is compared with a torque command value T*, and the difference between the values is amplified as a deviation by an error amplifier 13, and after that, the output of the difference is directed to a controller. |
