Electric vehicle drive motor efficiency optimizing control method and system

Abstract

The invention relates to an electric vehicle drive motor efficiency optimizing control method and system. In the invention, the vehicle driving mode is classified into a power mode and an economical mode according to the power battery remaining capacity state SOC value; when the vehicle power battery remaining capacity state SOC is greater than the set value, the vehicle is controlled to stay in the power mode, and the torque is output according to the motor torque required by the driver; and when the vehicle power battery remaining capacity state SOC is less than the set value, the vehicle is controlled to stay in the economical mode, and the motor is controlled according to current speed of the drive motor and the efficient-point torque corresponding to the motor torque required by the driver so as to drive the vehicle to run. In the invention, the motor can work near the efficient point more on the premise of guaranteeing the basic dynamic performance of the vehicle, the working efficiency is improved, the power consumption of the electric components is reduced, and the driving range of the pure electric vehicle can be effectively prolonged; and moreover, the designed loading capacity of the whole vehicle battery can be reduced, and the vehicle using cost is lowered.

Description

technical field [0001] The invention relates to an electric vehicle drive motor efficiency optimization control method and system, belonging to the technical field of electric vehicle motor control. Background technique [0002] Electric vehicles can better solve the problems of petrochemical energy shortage and environmental pollution, but the bottleneck of short driving range and high battery cost seriously restricts the development of electric vehicles. Since the state and local governments have corresponding subsidies in the field of new energy, new energy The cost of buying a car is not very high, so users pay more attention to the cost of using electric vehicles-power consumption. Improve the efficiency of motors and batteries from the perspective of key components, and take into account the cost. The research and development is difficult and the cycle is long. Therefore, from the perspective of control, optimizing the working efficiency of the motor under the premise ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an electric vehicle drive motor efficiency optimization control method and system to solve the problem that current motor control is not suitable for road conditions with frequent acceleration and deceleration

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