Electric automobile, control method and control device of electric automobile and controller

Abstract

The invention provides an electric automobile, a control method and a control device of the electric automobile and a controller. The control method comprises the following steps that when the work state is the advancing gear or the retreating gear, first control information for controlling a motor to output the parking torque is received in real time, and the first control information is used forcontrolling electric automobile deceleration or parking; all rotation speed values of the motor at the current advancing gear or retreating gear are obtained in real time; whether the parking torqueand the rotation speed value of the motor meet the temporary IGBT module stopping preset conditions or not is judged; and if the parking torque and the rotation speed value of the motor meet the temporary IGBT module stopping preset conditions, an IGBT module is stopped, accordingly, an electromechanical coupling system of the electric automobile is in a pure machine running state, and electromechanical coupling system abnormal sounds or shaking caused by motivation is prevented.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle and its control method, control device and controller. Background technique [0002] Among the driving methods of electric vehicles, the power system driven by a single motor is generally driven by a single motor. After the motor passes through the reducer, the differential is connected to the left and right half bridges to drive the wheels. In the prior art, the electromechanical coupling system of an electric vehicle driven by a single motor is prone to abnormal noise and vibration when the motor is at a very low speed (below 30km / h) and stops. PI parameters and processing the torque parameters of the motor are used to solve the problem of abnormal noise and vibration of the electromechanical coupling system, but none of the above methods can fully solve the problem of abnormal noise and vibration, and the adjustment and processing of parameters are very eas...

AI Technical Summary

Problems solved by technology

In the prior art, the electromechanical coupling system of an electric vehicle driven by a single motor is prone to abnormal noise and vibration when the motor is at a very low speed (below 30km / h) and stops. PI parameters and processing the torque parameters of the motor are used to solve the problem of abnormal noise and vibration of the electromechanical coupling system, but none of the above methods can fully solve the problem of abnormal noise and vibration, and the adjustment and processing of parameters are very easy to affect the power system. Smooth operation, making the powertrain not work properly

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