| 摘要 |
PURPOSE:To suppress the irregular torque of an AC motor and to improve the responsiveness of the motor by obtaining the primary current vector by considering the secondary leadage reactance and controlling the motor on the basis of the vector quantity. CONSTITUTION:Torque instruction T is obtained by a torque generator TQG from the speed deviation n between a speed instruction nC calculated by an adder/subtractor ASU1 and an actual speed (n), then torque vs. slip frequency is obtained by considering the secondary leakage reactance in advance, and slip frequency vs. primary current vector is obtained, and a slip frequency omegas is obtained by a slip frequency generator SG with the relationship between the torque instruction T and the torque vs. slip frequency. The primary current vector and hence the amplitude I1 and the phase phi1 of the primary current are obtained by an amplitude and phase generator CG with the slip frequency omegas and the slip frequency vs. primary current vector. |
