Dual-motor two-gear drive control system and method

Abstract

The invention provides a dual-motor two-gear drive control system and method. A motor controller of the dual-motor two-gear drive control system is connected with a first motor and a second motor, a vehicle controller analyzes the intention of a driver according to acquired accelerator pedal signals, acquired brake pedal signals and acquired current vehicle speed signals and calculates the target rotating speed and drive torque which meet current vehicle driving requirements, and the motor controller selects torque distribution with the minimum total power loss as the optimal drive torque distribution value between the dual motors by automatically calculating power loss of different drive torque distribution of the motors. Through reasonable matching of the dual motors and two-gear gears, on the premise that the vehicle dynamic property is guaranteed, efficiency of a drive system is effectively improved, and economy is taken into consideration to the maximum degree.

Description

technical field [0001] The invention belongs to the field of electric vehicle control, and in particular relates to a dual-motor two-speed drive control system and a drive control method thereof. Background technique [0002] Due to the green advantages of the power battery as a vehicle energy source, electric vehicles are considered to be the future development direction of the automobile industry. Not only the national new energy industry plan has raised the development of pure electric vehicles to a strategic level, but also the research and development of pure electric vehicles And industrialization has become a research hotspot in the automotive field both at home and abroad. [0003] At present, the biggest bottleneck hindering the further industrialization of pure electric vehicles is the power battery as its power source. The driving range, charging time and service life of the power battery all hinder the commercialization speed and promotion scope of pure electric ...

AI Technical Summary

Problems solved by technology

Since there is no speed change function, it is difficult to optimize the working point of the motor to run in the high-efficiency range during common operating conditions, which limits the optimal performance of electric vehicles whose driving range is already limited; 2 Although the driving scheme of a multi-speed transmission such as three-speed or three-speed transmission can well solve the above-mentioned problems in electric vehicles, it will make the structure of the drive system complex, increase the cost of the vehicle, and often require clutch control for gear shifting, which will increase the impact of shifting. Directly affect the comfort of the car

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