Two-motor driving system

Abstract

The invention discloses a two-motor driving system. The two-motor driving system comprises a left driving shaft, a right driving shaft, a left motor, a right motor and a speed changing box, wherein the left motor and the right motor are respectively symmetrically fixedly connected with the left side and right side of the speed changing box, the system adopts two sets of basically symmetric structures, two sets of motors with relatively smaller power are combined to form an electric driving system with relatively higher power, the requirement for the performance parameter indexes of system parts is almost half reduced, and the model selection range of device is wider, and the cost is lower; the symmetric mechanical and electrical structure can effectively balance the vibration, mechanical and electrical performance inside the system, the system comfort and reliability can be improved, and the torque steering effect can be effectively eliminated; and the electronic differential control is realized by virtue of a controller, no mechanical differential structure is used, and the complexity for adding a gear assembly is far lower than that of canceling the differential structure.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a dual-motor drive system. Background technique [0002] With the development of the new energy vehicle market, the use of motor drive systems is becoming more and more extensive, and the market's demand for upgrading traditional technologies is becoming more and more urgent. The existing electric drive system usually consists of a mechanical structure of a motor plus a gearbox, and cooperates with a battery and an inverter to realize speed-adjustable transmission. The electric drive assembly of the motor plus gearbox is usually arranged vertically or horizontally. The former usually cooperates with the rear drive of the integral bridge non-independent suspension, and is often used in the field of medium and heavy commercial vehicles; Drive various forms and various suspension structures, widely used in the field of light vehicles. The driving force of the electric ...

AI Technical Summary

Problems solved by technology

The driving force of the electric drive assembly motor is increased and decelerated through the gearbox, and the power needs to be distributed to the drive shafts on both sides through the mechanical differential. The electric drive system assembly must be matched according to the entire vehicle. Requires high-power motors, resulting in oversized motors and limited layout space

Moreover, the horizontal structure of the motor and the gearbox makes the two half-shaft output ends of the gearbox differential far away from the geometric center of the assembly, making it difficult to achieve an equal-length axis arrangement. Compared with traditional fuel-powered engines, the instantaneous The driving torque is much higher, and the non-equal-length half-axle leads to more obvious torque steer phenomenon when the vehicle accelerates, which brings danger to vehicle driving

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