Method of controlling torque of drive system of electric vehicle

A method of controlling torque of a drive system of an electric vehicle, the method comprising:

• determining, by a controller, a required torque according to a vehicle driving state while the vehicle is driven, and determining, by the controller, a total torque command based on the determined required torque;
• and
• performing, by the controller, a front wheel and rear wheel torque distribution process on the total torque command, so that a front wheel torque command for controlling an operation of a front wheel motor and a rear wheel torque command for controlling an operation of a rear wheel motor are determined,
• wherein, during coasting deceleration driving of the vehicle,
• the total torque command is determined as a negative (−) torque value for decelerating the vehicle,
• each of the front wheel torque command and the rear wheel torque command is determined as a value greater than or equal to a minimum torque threshold value determined as a positive (+) torque value;
• and
• a braking torque command for a friction braking device is generated by the controller so that the vehicle decelerates, and a friction braking torque by the friction braking device is applied to wheels of the vehicle, and
• wherein the braking torque command is determined as a negative (−) torque value obtained by subtracting a sum of the front wheel torque command and the rear wheel torque command from the total torque command.