Double-motor driving control method and device, controller and automobile

Abstract

The invention provides a double-motor driving control method and device, a controller and an automobile, and relates to the technical field of motor driving control. The method comprises the steps that the current travelling speed and master driving torque needing to be output to an automobile body from motors are obtained; first output torque of the first motor and second output torque of the second motor are determined under the travelling conditions of the travelling speed and the master driving torque according to a torque reference table, wherein first output torque corresponding to the first motor and second output torque corresponding to the second motor under conditions of different travelling speeds and different master driving torque when thetotal electric power is the smallest are recorded in the torque reference table; and the output torque of the first motor and the output torque of the second motor are adjusted according to the first output torque and the second output torque which are determined. According to the scheme provided by the invention, the problem that the single-motor driving efficiency is low is solved, the double-motor comprehensive driving efficiency is always kept within an optimal range, and the comprehensive efficiency of a driving system is improved.

Description

technical field [0001] The invention belongs to the technical field of motor drive control, and in particular relates to a dual motor drive control method, device, controller and automobile. Background technique [0002] The driving efficiency of the driving motor equipped with a pure electric vehicle is constantly changing at different speeds and different output torques, and the transmission structure of the single-stage reducer determines that a certain speed and a certain driving torque demand directly correspond to a fixed motor efficiency. , so it is difficult to improve the driving efficiency under certain working conditions. [0003] With the continuous development of pure electric vehicle technology, high-end pure electric vehicles are developing in the direction of high performance and four-wheel drive, but the driving capacity of a single motor is limited, and the traditional mechanical four-wheel drive system equipped with fuel vehicles is not conducive to the us...

AI Technical Summary

Problems solved by technology

[0002] The driving efficiency of the driving motor equipped with a pure electric vehicle is constantly changing at different speeds and different output torques, and the transmission structure of the single-stage reducer determines that a certain speed and a certain driving torque demand directly correspond to a fixed motor efficiency. , so it is difficult to improve the driving efficiency under specific working conditions

[0003] With the continuous development of pure electric vehicle technology, high-end pure electric vehicles are developing in the direction of high performance and four-wheel drive, but the driving capacity of a single motor is limited, and the traditional mechanical four-wheel drive system equipped with fuel vehicles is not conducive to the use of electric drive structure. Simple, flexible layout, and low transmission efficiency, so four-wheel drive models with dual motors and independent front and rear axles have emerged, that is, one motor is installed on each of the front and rear axles to drive their respective axles to achieve four-wheel drive functions.

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