Patent ID: 6255798
Filing Date: 2001-07-03
Classification: B60L,H02P,Y02T

Abstract:
A control apparatus for controlling an electric vehicle having: ac motor for driving the electric vehicle; a power converter for supplying power to said ac motor, said power being generated on the basis of an output signal obtained responsive to a drive condition of the vehicle and a speed of the motor; a control unit for generating a drive signal to actuate power devices in said power converter; and a torque reference generating means for generating a torque reference value for said motor to generate from the output signal obtained responsive to the drive condition of the vehicle and the speed of the motor, said control apparatus comprising:current reference generating means for calculating in response to said torque reference value a d-axis exciting current reference value according to which a magnetic flux of said motor is to be generated, and a q-axis torque current reference value, said d-axis and said q-axis being orthogonal to each other; andcurrent control means for generating ac voltage reference values Vu*, Vv* and Vw* from said d-axis exciting current reference value and said q-axis torque current reference value; and whereinsaid current reference generating means and said current control means are processed digitally by one and the same arithmetic unit.