| 摘要 |
<p>PURPOSE:To prevent the driving wheel of the motor-driven vehicle from sliping by temporarily interrupting the power running of the vehicle when the vehicle is starting and accelerating and coasting the vehicle. CONSTITUTION:When a switch 7a for an accelerator 7 and a switch 8a for a forward/reverse drive controller 8 are closed, a transistor 1a in a power running instruction circuit 1 is conducted, and a capacitor 1c is charged. The oscillating frequency of an oscillator circuit 3 for controlling the conductivity of a chopper circuit 4 increases in response to the voltage of the capacitor 1c. When the voltage of the capaitor 1c reaches a predetermined value, a transistor 1d conducts, and a capacitor 1e starts charging. At this time the oscillator circuit 3 maintains to oscillate at the oscillation frequency at that time. When the voltage of the capacitor 1e reaches a predetermined value, a transistor 1f is conducted, the capacitor 1c is again supplementarily charged, and the oscillating frequency of the oscillator circuit 3 is thereby increased again.</p> |
