| 摘要 |
PURPOSE:To control an induction machine with preferable characteristics by feedback correcting a slip frequency command to be given in a feed-forward manner by a deviation between a torque command and a generated torque. CONSTITUTION:A correction signal i*1d equivalent to a magnetic flux deviation is added to a direct-axis magnetic flux command i*1d0 equivalent to a secondary magnetic flux command phi*2 to obtain a direct-axis current command i*1d. A vector converter 33 converts the command i*1d and a quadrature axis current command i*1q into absolute value i*1 and a phase theta of a primary current in rotary coordinates. On the other hand, a correction signal omega*s equivalent to a torque deviation is added to a slip frequency omega*so equivalent to the command i*1q to obtain a slip frequency command omega*s. The sum of the command omega*s and a rotating frequency omegar is integrated to obtain a phase phi*, which is added to the phase theta. Further, the absolute value i*1 and the phase theta*1 are 2-phase/3-phase-converted, and the current commands i*1a-i*1C of a power converter 2 are output. |
