Three-in-one electric driving axle for electric vehicle and control method thereof

Abstract

The invention discloses a three-in-one electric driving axle specially for an electric vehicle. A three-in-one electric driving system technology for an electric special vehicle refers to the technology in which a motor controller, a motor and a reducer are integrated, the motor, the reducer and the motor controller are integrated as an assembly, the motor and the reducer are arranged on the sameaxis, a primary transmission device of the reducer is driven by an output shaft of the motor, power is transmitted to a differential device through the primary transmission device, two output gears ofthe differential device are connected with left and right half shafts respectively, driving power of the three-in-one electric driving axle is transmitted to transmission shafts on left and right sides through half shafts to drive tires to rotate, and a vehicle is driven to move. The three-in-one electric driving axle specially for the electric vehicle has the advantages that the controlling on the torque and rotation rate of the motor are achieved according to the working condition demands of the vehicle and by controlling an exciting current of the motor through an electronic controlling unit to meet the driving and operating demands of the vehicle, the controller is installed on a housing of the motor, copper wires between the controller and the motor are reduced, integration is adopted by products, the number of suppliers is reduced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of transmission and drive of electric vehicles, and in particular relates to a three-in-one electric drive axle for special electric vehicles. Background technique [0002] Pure electric vehicles have the advantages of compact structure, light weight and low cost. The electric drive axle is the core component of this type of pure electric vehicle, including the mechanical structure of the electric drive axle and its drive control system. How to ensure that the electric drive axle structure has sufficient strength and the drive control system has good control performance while meeting the design performance requirements has always been one of the hot spots in the industry. [0003] Patent application No. 201210582982.0 describes a coaxial direct-coupled drive axle assembly for electric vehicles. The technical gist of this patent is: axle housing comprises cylindrical housing assembly and left and right axle housing p...

AI Technical Summary

Problems solved by technology

However, the shell assembly of this patent is an overall box-shaped structure, which cannot realize the independent suspension function of the vehicle, and the motor structure process provided by the patent is difficult to implement

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