| 摘要 |
Included are a power converter 2 for driving an induction machine 1, a control unit 40 for controlling the power converter 2, and a brake force command computing unit 6 for computing a brake force command. The control unit 40 includes a regenerative brake force computing unit 12. The regenerative brake force computing unit 12 computes a first regenerative brake force BP1 that can be determined based on a d-axis current detected value id, a q-axis current detected value iq, a d-axis voltage command Vd*, a q-axis voltage command Vq*, and speed information É and also computes a second regenerative brake force BP2 that can be determined based on phase current information Iu to Iw, the d-axis voltage command Vd*, the q-axis voltage command Vq*, and the speed information É, and then selects any one of the first regenerative brake force BP1 and the second regenerative brake force BP2 according to the speed information É and outputs the selected one to the brake force command computing unit 6. |
