Output torque monitoring method of electric vehicle driving system, device and electric vehicle

Abstract

The present invention provides an output torque monitoring method of an electric vehicle driving system, an output torque monitoring device of the electric vehicle driving system, and an electric vehicle. The method comprises the following steps that: a command torque output from a motor controller and the first actual output torque of a motor are obtained; the second actual output torque of the motor is obtained according to the command torque and the current rotational speed of the motor; torque checking is performed on the command torque according to the first actual output torque and the second actual output torque, and whether a torque check result satisfies a preset early warning condition is determined; and if the torque check result satisfies the preset early warning condition, alarm information for prompting a user that a vehicle has a risk of failure is generated. According to the output torque monitoring method, device and electric vehicle of the invention, torque checking is performed on the command torque outputted by the motor controller according to the first actual output torque and second actual output torque of the motor, and therefore, unexpected output of the torque of the torque driving system can be detected in time so that the fault diagnosis mechanism of the motor controller can process the checked fault of the output torque of the motor, and therefore, safety accidents can be avoided.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an output torque monitoring method and device of an electric vehicle drive system and the 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 permanen...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an output torque monitoring method and device of an electric vehicle drive system, and an electric vehicle, so as to solve the problem of personal and vehicle safety accidents caused by the unexpected output of torque in the existing electric vehicle drive system

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