Control method of dual-motor driving system, storage medium and new energy automobile

Abstract

The invention discloses a control method of a dual-motor driving system, a storage medium and a new energy automobile. The dual-motor driving system comprises a first motor and a second motor, and the method comprises the steps that the target torque of the dual-motor driving system is acquired, and the first temperature of the first motor and the second temperature of the second motor are acquired; performing torque distribution on the first motor and the second motor according to the first temperature, the second temperature and the target torque; according to the torque distribution result and the efficiency MAP of the first motor and / or the second motor, a torque output curve of the first motor and / or the second motor is obtained through optimization calculation; and controlling the first motor and / or the second motor to output torque according to the torque output curve. According to the method, the operation efficiency of the dual-motor system when the working condition changes can be improved, and meanwhile, limitation of energy accumulation on output of the motors is avoided.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a control method of a dual motor drive system, a storage medium and a new energy vehicle. Background technique [0002] The power system of the new energy vehicle adopts a system with independent output of dual motors, which can give full play to the optimal matching under the requirements of road conditions and improve the utilization rate of the high-efficiency area of ​​the motor system. Especially for the synchronous motor and asynchronous motor dual-motor system, it can give full play to the advantages of the high-efficiency distribution of the synchronous motor in the low-speed area and the distribution of the asynchronous motor in the high-speed area. According to different vehicle operating conditions, the energy shunt control can be performed to improve the electric drive system. improve the operating efficiency and reduce the energy consumption of the whole ...

AI Technical Summary

Problems solved by technology

[0003] Due to its own characteristics, the driving motor system of new energy vehicles will generate high energy accumulation during the acceleration and deceleration process of the vehicle. Frequent acceleration and deceleration will easily cause the temperature of the motor to rise too fast, which will easily trigger the motor temperature alarm and cause power failure. output limit

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