Patent ID: 6388419
Filing Date: 2002-05-14
Classification: B60L,Y02T

Abstract:
A motor control system for use within a vehicle including an alternating current type electric motor, a direct current type electrical power supply, and at least one driver-operated control, said control system comprising:a first portion which is communicatively coupled to and receives torque commands from said at least one driver-operated control; a second portion which receives generated flux current and torque current, and which includes a flux observer having a current model which is applied when said motor is operating at a low speed, and a voltage model which is applied when said motor is operating at a high speed; a torque control portion which receives torque commands from said at least one driver-operated control and which is effective to provide said torque current and said flux current based upon said received torque commands; a vector control portion which receives said torque current and said flux current and which is effective to provide a first voltage value and a second voltage value based upon said torque current and said flux current; and a space vector pulse-width modulating portion, which is coupled to said power supply and to said motor, which receives said first voltage value and said second voltage value and which uses said first and second voltage values to deliver a multi-phase voltage signal to said motor, effective to cause said motor to accurately deliver said torque commands.