A motor torque control method and a wheel-side motor distributed drive system

Abstract

The invention provides a motor torque control method and a wheel rim motor distributed drive system. The method is applied to a vehicle control unit in the system. The system further comprises two motor systems. The motor systems comprise motors. By means of the method, the following motor torque control process is executed to the motor systems at the same time. Based on current accelerator pedalsignals and the current rotating speeds of the motors in the motor systems, torque basic values of the motors in the motor systems are calculated; the torque basic values of the motors are corrected,and torque corrected values of the motors are obtained; the torque corrected values of the motors are limited through the current vehicle speed of a vehicle and the motor torque recently sent to the other motor system by the vehicle control unit historically, and torque limited values of the motors are obtained; the motor torque is determined from the torque limited values and the torque correctedvalues of the motors and input in the motor systems to which the motors belong, and therefore the motor systems are controlled to respond to the motor torque to control the motors in the motor systems to drive driving wheels, used for being driven by the motor systems, on the vehicle.

Description

technical field [0001] The invention relates to the technical field of motor drive, and more specifically, to a motor torque control method and a wheel-side motor distributed drive system. Background technique [0002] The driving wheel of the car is the wheel connected to the drive axle, and the ground friction it receives is forward to provide driving force for the driving of the vehicle. Vehicles usually have two driving modes, one is front-wheel drive and the other is rear-wheel drive. Front-wheel drive means that the two wheels at the front of the vehicle are driving wheels, and the two wheels at the rear are non-driving wheels. The two wheels at the front are non-drive wheels, and the two wheels at the rear are drive wheels. [0003] The wheel side motor distributed drive system adopts the independent drive mode of the left drive wheel and the right drive wheel. Although this mode can provide motor torque to each drive wheel side motor separately, drive the correspond...

AI Technical Summary

Problems solved by technology

[0003] The wheel side motor distributed drive system adopts the independent drive mode of the left drive wheel and the right drive wheel. Although this mode can provide motor torque to each drive wheel side motor separately, drive the corresponding drive wheel to provide driving force for the vehicle; however, If there is a difference in ground adhesion between the left and right driving wheel sides, as the torque of the motor on the driving wheel side continues to increase, there will always be one side of the driving wheel that reaches the adhesion limit first and slips. When the yaw torque is large and the lateral adhesion of the wheels is relatively poor, there will be problems with the yaw of the vehicle body, which will affect driving safety.

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