| 摘要 |
<p>A vehicle, particularly a wheel-chair, driven by an electromotor (4) which is powered by a supply of direct current, said vehicle being provided with a motor control circuit to keep the speed of the motor at a chosen adjusted value by the steps of producing a signal which is representative of the speed, comparing the signal with the adjusted speed value and controlling, in dependence on the measured djfference, the mean value of the current supplied to the motor, in which the signal which is representative of the speed of the motor is a voltage derived from the current flowing through the motor.</p> |
