Motor torque control method aiming at different driving modes

Abstract

The invention discloses a motor torque control method aiming at different driving modes. The motor torque control method aiming at the different driving modes comprises the following steps that (1) anaccelerator pedal position signal, an accelerator pedal change rate signal, a gear signal, a motor voltage signal and a battery SOC signal are acquired through a high-speed CAN bus to judge an immediate driving mode of a driver; the driving mode comprises an economic mode and a power mode; (2) the motor voltage signal is acquired, and initial motor target torque is determined according to the current voltage of a motor; and (3) the initial motor target torque is adjusted to final motor target torque according to the driving mode result judged in the step (1);and the final motor target torqueis the motor torque corresponding to a pedal working mode under the corresponding pedal opening under the specific working condition. According to the motor torque control method aiming at the different driving modes, the motor torque is rapidly adjusted according to the driving modes of a driver, the economical and dynamic requirements of the whole electric vehicle are met, and the endurance mileage of the whole vehicle and the output accuracy of the motor target torque are improved.

Description

technical field [0001] The invention relates to electric vehicle motor control technology, in particular to a motor torque control method for different driving modes. Background technique [0002] The electric vehicle, which integrates many high-tech technologies, has the advantages of low emission pollution, low noise, etc., and has incomparable advantages in environmental protection and energy saving. It is triggering a revolution in the world's automobile industry. When an electric vehicle is running normally, the driver’s requirements for the vehicle are more complicated, and it is often necessary to switch between the power mode (at this time the motor torque is larger to meet the power performance even when accelerating or climbing) and the economic mode (at this time the motor efficiency is higher Reduce energy loss to support the car to travel longer mileage) switch back and forth, and the operating voltage of the motor varies widely, and the motor often works in a n...

AI Technical Summary

Problems solved by technology

When an electric vehicle is running normally, the driver’s requirements for the vehicle are more complicated, and it is often necessary to switch between the power mode (at this time the motor torque is larger to meet the power performance even when accelerating or climbing) and the economic mode (at this time the motor efficiency is higher Reduce energy loss to support the car to travel longer mileage) switch back and forth, and the operating voltage of the motor varies widely, and the motor often works in a non-rated voltage region, requiring a large number of complex calculations. Most motors on the market and in patents target torque The acquisition method cannot meet the requirements, and the target torque control method of the motor in other patents does not consider the change of the working voltage of the motor, so that the torque of the motor cannot be accurately controlled, and the fluctuation is large

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