Research And Manufacture Of Double Cage Copper Rotor Asynchronous Motor With High Performance For Electric Vehicle

With the increasing demand for automobiles in the world,the exhaust pollution caused by automobiles and the energy crisis affect the sustainable development of automobiles.Compared with traditional fuel vehicles,new energy vehicles have the advantages of cleanliness,high efficiency and low noise.As an effective solution to energy saving and emission reduction,the development of new energy vehicles has attracted more and more attention from countries.As a kind of new energy vehicle,pure electric vehicle does not need complex mechanical structure such as clutch,and its production difficulty and cost are significantly reduced compared with diesel locomotive.The relatively simple structure brings about the improvement of reliability.With the continuous development of power semiconductor and motor control technology,the development level of pure electric vehicle(EV)has been rapidly improved.It is an urgent need to improve the performance of driving motor of EV.By comparing the shape,performance and economy of four typical driving motors of new energy vehicles,it is determined that AC asynchronous motor is more suitable for pure electric vehicles.As a kind of asynchronous motor,double cage copper rotor asynchronous motor has the characteristics of high efficiency,high power density and high reliability.It can further improve the performance of the driving motor without significantly increasing the manufacturing cost,and make the efficiency and output characteristics of the motor close to the requirements of the ideal driving motor.It has a wide application in pure electric drive motor vehicles and hybrid drive vehicles.Development prospects.This design mainly includes four main parts: First,the electromagnetic design of double cage copper rotor asynchronous motor.The reference dimensions,winding data and motor performance parameters of the stator and rotor of the driving motor are calculated by magnetic circuit method to prepare for the next design work.Secondly,the finite element analysis of double cage copper rotor asynchronous motor.Maxwell motor simulation software was used to calculate the influence of iron core material and three different rotor bar materials,aluminum and brass,on motor performance parameters,as well as the influence of different core length,air gap width and ratio of stator and rotor slots on motor performance.The former results show that the copper rotor asynchronous motor is more suitable for pure electric vehicles than the aluminum and brass rotor.The latter results show that the above-mentioned optimal values affecting motor performance parameters are obtained.Thirdly,with the conclusion of the second part as a reference,the prototype is manufactured.Firstly,the stator and rotor core are processed,then the double cage copper rotor is processed,and then the stator is processed.Finally,the prototype is assembled and preliminarily verified,which can be tested in the next step.With the increasing demand for automobiles in the world,the exhaust pollution caused by automobiles and the energy crisis affect the sustainable development of automobiles.