Electric automobile driving system

Abstract

The embodiment of the invention provides an electric automobile driving system, which is used for driving wheels (4) and comprises a motor (1), a continuously variable transmission (2), a half shaft (3), the wheels (4) and a transmission controller (5), wherein the input end of the continuously variable transmission (2) is connected with the output end of the motor (1), and the output end of the continuously variable transmission (2) is connected with the half shaft (3); the half shaft (3) is connected with the wheels (4); and the transmission controller (5) is used for controlling the continuously variable transmission (2) to change the transmission ratio. According to the embodiment of the invention, the continuously variable transmission (2) is introduced, so that the rotating speed canbe adjusted in a stepless manner while the effects of speed reduction and torque increase are achieved, various working conditions of the vehicle are adapted, the control experience of the vehicle isimproved, the motor (1) can be kept operating within the most ideal rotating speed range, the efficiency of the motor (1) is maximized, and the power consumption is reduced.

Description

technical field [0001] The invention relates to the field of electric vehicle control, in particular to an electric vehicle drive system. Background technique [0002] At present, with the rapid economic development of human society, non-renewable resources such as petroleum energy are facing the threat of depletion, and environmental pollution is becoming more and more serious. Therefore, as an alternative to fuel vehicles, electric vehicles are receiving more and more global attention. [0003] The driving force source of electric vehicles is the drive motor. Like traditional internal combustion engine vehicles, electric vehicles also need to convert the high speed output by the drive motor into torque through the reducer to drive the vehicle forward more efficiently. Existing electric vehicles are generally decelerated by a single drive motor through a single-stage reducer or a two-speed reducer, and the torque is distributed to the left and right drive shafts through th...

AI Technical Summary

Problems solved by technology

[0004] In the process of realizing the present disclosure, the inventors have found that the relevant technologies have at least the following problems: the selectable gears of the single-stage reducer or the two-speed reducer in the existing electric vehicle drive system are very limited, and cannot satisfy the Various driving conditions of the vehicle lead to poor driving experience of the vehicle, and the drive motor cannot always operate in the optimal speed range, so the efficiency of the motor cannot be maximized

Images