Control method and device for preventing electric car from slipping on slope and electric car

Abstract

The invention relates to the technical field of electric cars, and discloses a control method and device for preventing an electric car from slipping on a slope and the electric car. The electric carincludes a motor; the method includes the steps that when the electric car stays at a state of slipping on the slope, the motor is controlled to run for a first time under a zero current state, and the zero current acceleration speed of the electric car within the first time is obtained; according to the zero current acceleration speed, a control curve of the current is calculated; according to the control curve of the current, control current is determined, and the motor is controlled according to the control current. The control method for preventing the electric car from slipping on the slope can effectively shorten the slipping distance on the slope on the premise of ensuring the smoothness of control.

Description

technical field [0001] The present invention relates to the technical field of electric vehicles, in particular to a slope prevention control method and device and an electric vehicle. Background technique [0002] With the rapid development of new energy vehicles, electric vehicles are gradually becoming an important means of transportation. An electric vehicle uses a motor as a power source, and controls the motion of the motor through a motor control system to achieve motion control. [0003] The motor control system is the brain of the entire electric vehicle. It mainly controls the movement of the motor to achieve the purpose of controlling the driving of the vehicle. In addition to controlling the normal driving of the car, the motor control system also has an important function, which is anti-slope control. Anti-slope control means that when the vehicle body is on a slope, due to the gravity of the vehicle body, the vehicle body will automatically slide down. At thi...

AI Technical Summary

Problems solved by technology

[0004] There are two existing anti-slope control methods: one is to install an angle sensor on the controller, use the angle sensor to detect the current slope angle, and calculate the anti-slope control stable current according to the slope angle; the other is to use the PID speed Closed-loop control, since the controlled object is a large inertia system, it is difficult to achieve a good balance between response speed and overshoot by using PID control, so that the slope distance cannot be shortened well

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