| 摘要 |
<p>PURPOSE:To achieve stable travel performance, by detecting existence of slip operation of a vehicle based on the rotary speed of motor and the travel speed of a vehicle, and lowering the increasing rate of motor rotation when the vehicle is performing slip operation. CONSTITUTION:A CPU 11 controls a chopper circuit 14 based on a set value of acceleration of a power control volume 9 and increases the rotary speed of a motor 2 gradually thus controlling the rotary speed of the motor 2 to a travel speed based on the operating amount of an acceleration level 1. A drive contactor 17 and a reverse contactor 8 are also controlled. If the motor is rotating when the vehicle starts to travel although the vehicle is not rotating, it is judged that the vehicle is slipping and the set value of acceleration determined through the power control volume 9 is reduced.</p> |
