Patent ID: 6124645
Filing Date: 2000-09-26
Classification: B60L,H02P,Y02T

Abstract:
An electric vehicle, comprising:wheels for at least driving said vehicle;a motor including a rotor mechanically coupled to at least one of said wheels for, when energized, driving said wheels and said vehicle, said motor providing starting torque at all rotational positions;a source of electrical energy:a source of motion command signals;a control loop coupled to said source of motion command signals, to said source of electrical energy, and to said motor, for controlling the voltage and current applied to said motor in order to generate the torque of said motor in response to said motion command signals; andmeans coupled to said control loop and to said source of motion command signals, for causing said control loop to control the angular position of said rotor, instead of the torque of said motor, upon the concurrence of (a) motion command signals commanding zero motion of said vehicle and (b) zero velocity of said rotor.