Electric driving system

Abstract

The invention provides an electric driving system, and relates to the technical field of driving. The electric driving system comprises a driving motor, a motor controller and a speed reducing mechanism, wherein the driving motor is provided with an output shaft; the motor controller is electrically connected with the driving motor; the speed reducing mechanism comprises an input shaft which is connected with the output shaft of the driving motor and is coaxially arranged; and at least part of the motor controller is arranged between the driving motor and the speed reducing mechanism. According to the electric driving system provided by the invention, at least part of the motor controller is arranged between the driving motor and the speed reducer mechanism, so that the space is effectively utilized, the electric driving system is compact in structure and small in overall dimension, and the mounting precision is effectively guaranteed; and the requirements of the motor controller on environment test are reduced.

Description

technical field [0001] The present application relates to the field of drive technology, and in particular to an electric drive system. Background technique [0002] like figure 2 As shown, the motor 100 is used as the main driving device to provide power in some applications, for example, in new energy vehicles, the motor 100 is used to replace the engine as the power source of the vehicle. When the whole vehicle is assembled, the motor 100, the controller 200 and the reduction mechanism 300 are assembled together. [0003] Wherein, a coupling is used to connect the output shaft of the motor 100 and the input shaft of the reducer, and flanges are respectively made on the housing of the motor 100 and the housing of the reduction mechanism 300, and the flanges are fastened by positioning pins and screws. [0004] After the motor 100 and the reduction mechanism 300 are assembled together, the controller 200 is further installed above their assembly. For example, two install...

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Problems solved by technology

[0006] However, the above assembly formed by assembling the motor 100, the reduction mechanism 300 and the controller 200 does not make effective use of the space, and the structure is not compact enough.

In addition, there are cables and low-voltage signal connections between the motor 100 and the controller 200. In order to meet the protection requirements of the cables, a window 110 is designed at the corresponding position of the motor 100 and the controller 200. The window 110 needs to be sealed and dust-proof. These designs require Processing and installation of additional parts not only increases the cost but also has the problem of connection strength

In addition, in the above-mentioned assembly, especially the controller 200 straddles the two assemblies of the motor 100 and the reduction mechanism 300, it is difficult to guarantee the assembly accuracy, and it is difficult to meet the requirements of the vibration test (that is, there is a great risk in fatigue resistance); The assembly actually exists in the form of three assemblies, with many parts and high cost

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