| 摘要 |
PROBLEM TO BE SOLVED: To improve operation ability of an electric vehicle by causing a motor to generate a new drive force controlling reduction of at least the drive force against the drive force output previously when it is determined that the rotating direction is not matched with the direction of drive force and velocity is increasing. SOLUTION: When a nursing person moving an electric wheel chair while manipulating an operating panel for the pulling operation on the downward slope, the velocity is increasing and the pulling force is loosened in some cases. If the pulling operation force is loosened and the driving force is rapidly lowered, the force against the gravity is lost and the electric wheel chair is accelerated rapidly. However, in this case, since amount of change is reduced to a half, change of driving force becomes smaller than the actual mount of manipulation of the operation panel 8 (returning amount of pulling operation) and rapid drop of driving force is controlled. Accordingly, rapid acceleration of electric wheel chair is prevented. Thereby, unstable manipulating force can be prevented to improve manipulation ability. |
