Simulation of Motor Braking under the ABS based on Simulink

YUAN Shankun;CHU Jiangwei;LI Hongliang;ZHANG Minan;School of Traffic, Northeast Forestry University;

YUAN Shankun%CHU Jiangwei%LI Hongliang%ZHANG Minan%School of Traffic, Northeast Forestry University

Single wheel model;;simulation;;ABS;;vector control;;motor brake

In order to investigate the characteristics of electric motor braking under the action of ABS, a dynamic model of electric vehicle based on the single wheel model of the vehicle is built, the transfer function of the hydraulic brake system is constructed, and an ABS model based on the PID control principle is designed. The permanent magnet synchronous motor is selected and the id=0 control strategy is adopted. The principle of coordinate transformation is used to perform vector control of the permanent magnet synchronous motor and the motor act as a brake. Braking force transmission system is designed to achieve the transmission of braking torque. The parameters of single-wheel electric model are set and initial braking speed is set at 25 m/s. The single-wheel braking model for electric vehicles is established using simulink and simulation experiments are conducted. We study and analyze the changes of the slip rate of the single-wheel electric vehicle model under the action of ABS during the braking process, the changes of the hydraulic brake torque under the condition of whether the motor braked and the stator three Phase output current changes, when the motor brakes. The simulation results show that when the motor rotor cuts the magnetic line, the induction current is generated, then the motor can recover part of the braking energy, and the model can get a considerable simulation result.