Dual-motor control system and control method of dual-motor combined driving system

Abstract

The invention discloses a dual-motor control system and a control method of a dual-motor combined driving system, which adopt the dual-motor control system of a multi-core single processor to respectively control the operation of two motors with different characteristics, save resources such as communication, storage and peripheral circuits, and reduce the influences that motor response speeds are different and the effective cooperation is not realized caused by communication time difference. Meanwhile, light weight, low cost and high reliability are realized. The three cores execute different tasks according to task properties so as to optimize division of labor and improve the operation efficiency. The kernel 1 receives a whole vehicle demand torque command and optimizes torque distribution in real time according to different characteristics and data of the two motors, the kernel 2 and the kernel 3 carry out vector control on the two motors respectively to output corresponding torques, co-state variables are dynamically adjusted according to road conditions to be suitable for various road conditions, torque distribution is optimized in real time, and therefore, the loss of the controller and the dual-motor coupling driving system is minimized so as to achieve efficient operation.

Description

technical field [0001] The invention relates to the technical field of electric drive for electric vehicles, in particular to a control system for a dual-motor combined drive system. Background technique [0002] At present, most pure electric vehicle drive systems are driven by a single power source, that is, a single motor. Due to the different requirements for motor power, speed, and torque when the vehicle is accelerating, low-speed, and high-speed, it is difficult for the motor to operate in a wider speed range. In order to achieve high-efficiency drive, the overall drive efficiency is low in the full operating cycle; and with the increase of power demand, its weight, volume, DC voltage, and current continue to increase. Therefore, the multi-power source drive system and the coordinated drive of motors with different operating characteristics have become an important technical development direction to solve the above problems. [0003] Multi-power source coordinated dr...

AI Technical Summary

Problems solved by technology

This method is relatively simple and depends on the setting of the threshold value, and does not consider the motor efficiency characteristics, the distribution result is not optimal, and it is difficult to achieve high-efficiency operation in the high, medium and low full-speed range

[0005] Dynamic programming is one of the most widely used global optimization algorithms when optimizing allocation with the goal of optimal efficiency or comprehensive economic efficiency. However, its calculation is huge and it is easy to fall into the disaster of dimensionality. for real-time management

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