Method and device for determining torque, and electric vehicle

Abstract

The invention provides a torque determining method and device and an electric vehicle. The problem that as for an existing torque distribution method, the vehicle stability requirement is hard to meetis solved. The torque determining method comprises the steps that according to current operating parameters of the electric vehicle, the corresponding distribution torque of each driving wheel is obtained; according to the relationship between the current slippage rate and the preset slippage rate of all the driving wheels and yaw information of the electric vehicle, the distribution torque of the driving wheels is adjusted; and according to the adjusted distribution torque, output torque of all the driving wheels is obtained. According to the relationship between the current slippage rate and the preset slippage rate of all the driving wheels and the yaw information of the electric vehicle, the distribution torque of the driving wheels is adjusted, according to the adjusted distributiontorque, the output torque of all the driving wheels is obtained, the drive torque of the left wheel and the right wheel are subjected to average distribution not merely, the wheels can be effectivelyprevented from sliding, yaw movement of the vehicle is effectively controlled, and the vehicle stability requirement is met.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a method and device for determining torque and an electric vehicle. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming the hotspots of current research. As a type of energy-saving and new energy vehicles, pure electric vehicles have many advantages such as no exhaust emissions, high energy efficiency, low noise, and recyclable energy during driving. Therefore, vigorously developing pure electric vehicles is beneficial to energy security and environmental protection has great significance. [0003] Pure electric vehicles drive the wheels through motors to drive the vehicle. As the core functions of pure electric vehicles, motor drive and control have a great impact on the performance of the vehicle. With the development of permanent magnet materials, power electronics te...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a torque determination method, device and electric vehicle to solve the problem that the existing torque distribution method is difficult to meet the vehicle stability requirements

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