Integrated power driving and control system for electric vehicle

Abstract

The invention provides an integrated power driving and control system for an electric vehicle. The integrated power driving and control system for the electric vehicle comprises a driving motor. The driving motor includes a common seat, an integrated shaft for the motor and a speed reducer, a stator, a rotor, a first-stage driven gear, a second-stage driving gear shaft, a second-stage driven gearand a differential mechanism. The stator is arranged on the common seat, and the rotor is arranged on the stator. The integrated shaft for the motor and the speed reducer is connected with the rotor.The integrated shaft for the motor and the speed reducer is connected with a first-stage driving gear. The first-stage driving gear is meshed with the first-stage driven gear. The integrated power driving and control system for the electric vehicle has the beneficial effect that the common seat is used for replacing a traditional seat, a front cover and a large box, the integrated shaft for the motor and the speed reducer is adopted, the connection structure of a spline is avoided, the spline does not lose efficacy in the operation of high speed impact and large loads, series parts are reduced, the processing procedure of parts is reduced, the accumulative error after the assembly is small, the quality of a product can be significantly increased, and the cost is reduced.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to an integrated power drive and control system for the electric vehicle. Background technique [0002] At present, the power drive and control system for electric vehicles is composed of drive motor + motor controller + reducer. The drive motor, motor controller, and reducer are independent components. The motor controller is connected to the drive motor through a three-phase cable. The motor is assembled into an assembly through a set of internal and external spline pairs and mating surfaces with the reducer, such as figure 1 As shown, the driving motor includes a rear end cover 1, a rotating shaft 2, a stator 3, a rotor 4, a base 5, and a front cover 6, and the reducer includes a large box 7, an input shaft (first-stage driving gear) 8, and a small box 9 , a primary driven gear 10, a secondary driving gear shaft 11, a secondary driven gear 12, a differential 13, and a half shaft 14; the dr...

AI Technical Summary

Problems solved by technology

[0004] 1. The rotating shaft 2 of the driving motor and the input shaft 8 of the reducer are two separate shafts, and the middle is connected by a spline pair 18. It is very common for the vehicle to run at high speed and the speed is unstable. There is a certain gap, and the tooth side gaps will collide with each other, resulting in high temperature, wear, abnormal noise, fatigue failure, and high cost;

[0005] 2. The drive motor base 5, the front cover 6 and the large reducer box are divided into three sections, there are many parts in series, many processing steps, many materials are used, the weight is heavy, the cumulative error after assembly is large, and the cost is high;

[0006] 3. The driving motor and the motor controller 15 are completely separated, and a long three-phase cable 16 and cooling water pipe 17 are required, which is costly

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