Slide feedback control method and control method thereof of vehicle

Abstract

A sliding feedback control system of a vehicle is provided. The system includes: an electric motor (3); a power battery (1); a battery manager (9) connected with the power battery (1), and configured to obtain a maximum charging power of the power battery (1); and a motor controller (2) connected with the electric motor (3), and configured to obtain maximum feedback torque values of the motor controller (2) and the electric motor (3), to convert the maximum charging power of the power battery (1) into a maximum feedback torque value of the power battery (1), to determine a minimum of the maximum feedback torque values as a first feedback torque value, to obtain a second feedback torque value, and to determine a final feedback torque value of the electric motor (3) as a minimum of the first and second feedback torque values, such that the electric motor (3) controls the vehicle to perform the sliding feedback operation according to the final feedback torque value.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a vehicle sliding feedback control system and a control method thereof. Background technique [0002] Electric vehicles use power batteries as the power source. How to fully improve the energy efficiency of electric vehicles to extend the driving range of vehicles is a key problem that electric vehicles need to solve. Energy feedback is an effective measure to solve this problem. [0003] Energy feedback includes vehicle braking feedback and coasting feedback. In the vehicle's coasting feedback control, the motor controller controls the motor to give feedback according to the calculated feedback torque value, thereby charging the power battery, increasing the driving range of the vehicle, and reducing the emission of pollutants. Wear from emissions and mechanical braking. [0004] The patent application with the publication number CN102490722A discloses a method and system for recoverin...

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Problems solved by technology

[0005] The above method obtains the final feedback torque of the motor through calculation. Although it can effectively improve the efficiency of energy recovery during vehicle coasting, there are still some defects: the motor controller is used to drive the motor, so the current state of the motor controller directly affects the power output of the motor. It will also affect the feedback torque of the motor. The above method does not calculate the constrained feedback torque of the motor controller; in addition, the above method does not fully consider the current road conditions and the impact of the vehicle's working mode on the vehicle's sliding feedback, so it is calculated by the above method The final feedback torque of the motor obtained is not perfect, and it will still affect the efficiency of vehicle coasting feedback

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