Controller for electric vehicles

A controller for an electric vehicle comprising:

• travel control means for calculating a target driving torque for an electric motor which drives said vehicle;
• and
• motor control means for calculating a final indication torque obtained by correcting said target driving torque so that said electric motor can be suitably driven, and supplying electric power according to said final indication torque to said electric motor;
• wherein said travel control means comprises
• target driving torque calculating means for calculating said target driving torque;
• a signal control means for outputting said target driving torque calculated by said target driving torque calculating means after a delay time preset based on a communication speed between said travel control means and said motor control means;
• final indication torque confirmation value calculating means for calculating a final indication torque confirmation value, as with said motor control means, based on the calculated target driving torque that is input from said signal control means after said delay time and operation condition of said electric motor;
• and
• abnormality determining means for determining an abnormality of said motor control means based on a result of comparison between said final indication torque and said final indication torque confirmation value,
• wherein said signal control means outputs a determination stop signal to the abnormality determining means to stop determination of the abnormality of the motor control means if a rate of change of said target driving torque is greater than or equal to a predetermined rate of change,
• wherein said abnormality determining means determines that when a difference between said final indication torque and said final indication torque confirmation value is greater than or equal to a preset value, said motor control means is abnormal, and
• wherein said preset value is set based on a difference between said delay time and an actual communication delay.