Method of controlling torque of drive system of electric vehicle

A method of controlling torque of a drive system of a 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 and a rear wheel torque command following the total torque command are determined,
• wherein the controller is configured to:
• perform a backlash control for limiting a torque slope of the front wheel torque command while the front wheel torque command passes through a backlash band, which is a torque region where there is possibility that backlash occurs in a front wheel-side drive system;
• and
• generate a braking torque command for generating a friction braking torque while the backlash control is performed,
• wherein a maximum permissible change rate in the backlash band of the front wheel torque command is set in the controller;
• and
• wherein, in the controller, the maximum permissible change rate in the backlash band of the front wheel torque command is set to a value not causing backlash impact in the front wheel-side drive system.