| 摘要 |
<p>PURPOSE:To extend the range of a gradient to be applied by traveling a vehicle at a constant speed on a gentle descent, and decelerating on the basis of a deceleration signal inversely proportional to the angle on a steep descent. CONSTITUTION:When a start command 22 is input, a gradually rising voltage is output from a start compensator 16. A comparator 25 applies a PWM signal in response to the voltage to a transistor 2 to control an armature current. On the other hand, the output of the compensator 16 permits a peak priority circuit 9 to output the highest voltage for the prescribed time. A comparator 10 applies the PWM signal in response to the output of the circuit 9 to a transistor 6 to control a field current. When the speed of a vehicle is accelerated, the output of a rotation detector 12 becomes the maximum input of the circuit 9. If the gradient of the descent becomes steep, a deceleration signal proportional to the angle from angle detecting means 14 becomes the maximum input of the circuit 9.</p> |
