ELEKTRISCHE AANDRIJFINRICHTING VOOR EEN VOERTUIG.

摘要

A battery driven car provided with an inverter supplying an induction motor which drives the wheels, has the speed of the motor and its torque controlled by the frequency and power output of the inverter. This is controlled by an analogue voltage obtained from an accelerator pedal assembly and by a second analogue voltage obtained from a tachometer driven by the motor. The accelerator pedal has a rest position corresponding to idling of the induction motor and two ranges of movement. Movement of the accelerator pedal through the first range of movement causes a slip speed signal from the accelerator pedal assembly to diminish progressively in a range corresponding to the generation of a negative torque by the induction motor, and during the second range the slip speed signal increases progressively corresponding to a positive torque being produced by the induction motor.