| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress offset-like output fluctuation associated with control mode change in a drive controller for alternating-current motors having a control mode change function. <P>SOLUTION: A torque fluctuation estimation unit 510 performs the following operation: it detects that the output (torque) of an alternating-current motor M1 is caused to fluctuate by offset between control modes when a control mode is changed from fluctuation in battery current Ib; it converts fluctuation in the output current of a direct-current power supply into torque fluctuation based on the amount of battery current fluctuation; and it thereby computes an amount ΔTrq# of correction required for torque command value. A correction computation unit 520 generates a torque command value Trqcom# in a control mode after control mode change by computation based on an original torque command value Trqcom and the required correction ΔTrq computed by the torque fluctuation estimation unit 510. <P>COPYRIGHT: (C)2008,JPO&INPIT |
