A vehicle and its drive motor control system and method

Abstract

The invention discloses a driving motor control system for a vehicle, which comprises a parameter input module, N controllers preset based on N different working conditions, a stacking module, a pulsewidth modulation module and a working condition recognition module, wherein the parameter input module is used for sending the difference between i<d><*> and id and the difference between i<q><*> andiq to each controller; each controller is used for outputting a corresponding voltage control amount according to input signals of each controller; the stacking module is used for calculating ud anduq through first equations, wherein the first equations are as described in the specifications, and wi is the weight corresponding to ith controller; the pulse width modulation module is used for generating corresponding pulse width modulation signals according to ud and uq for motor control; and the working condition recognition module is used for recognizing a controller closest to the actual working condition of the current vehicle in the N controllers according to a preset recognition cycle and improving the weight corresponding to the recognized controller. When the scheme disclosed in the invention is applied, the vehicle can reach high efficiency and high performance under different working conditions. The invention also discloses a vehicle and a driving motor control method thereofwith the corresponding effects.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a vehicle and its drive motor control system and method. Background technique [0002] The drive motor is the core component of the electric vehicle, and the stable and efficient operation of the motor is an important guarantee for the high performance and high efficiency of the electric vehicle. By controlling the AC amplitude, phase or frequency of the motor stator, the motor can be operated at a desired speed or torque state. [0003] At present, when controlling the motor of a vehicle, a linear constant system is usually used, that is, a specific stable operating condition is specified to establish a linear system model, and the speed or torque is output through the linear system model, and then the Motor control. In this linear system model, the parameters of the controller are fixed constants, and the PI controller is widely used. In the actual operation of the v...

AI Technical Summary

Problems solved by technology

However, due to the various and constantly changing operating conditions of the vehicle, this type of linear system model cannot well adapt to changes in the vehicle's operating conditions, and its robustness is poor, which is not conducive to the vehicle's performance under different operating conditions. High efficiency and high performance

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