| 摘要 |
Included are a power converter for driving an induction machine, a control unit for controlling the power converter, and a brake force command computing unit for computing a brake force command. The control unit includes a regenerative brake force computing unit. The regenerative brake force computing unit computes a first regenerative brake force that can be determined based on a d-axis current detected value, a q-axis current detected value, a d-axis voltage command, a q-axis voltage command, and speed information and also computes a second regenerative brake force that can be determined based on phase current information signals, the d-axis voltage command, the q-axis voltage command, and the speed information, and then selects any one of the first regenerative brake force and the second regenerative brake force according to the speed information and outputs the selected one to the brake force command computing unit.
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