| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor driving device of an electric vehicle capable of allowing the vehicle to reduce its speed preventing its wheels from locking, and to run at an appropriate speed, while achieving cost reduction.SOLUTION: A motor driving device of an electric vehicle comprises a power generation brake control part 24, which generates a brake force by short-circuiting a motor coil to substitute a driving control part 23 for control. The power generation brake control part 24 comprises: a switch 4; driving wheel revolution speed detection means 26; driven wheel revolution speed detection means 27; driving wheel reference revolution speed calculation means 28; and duty ratio control means 29. The duty ratio control means 29 controls a duty ratio, which is a ratio of a short-circuit time to a whole operation time of the power generation brake control part 24, so as to control a revolution of a driving wheel 7 detected by the driving wheel revolution speed detection means 26 to follow the reference revolution speed. |
