Research On Motor Design Of Parallel Hybrid Electric Vehicle Based On Reverse Technology

Due to the increasingly serious environmental problems,the automobile exhaust emission is more and more strict in all over the world.The traditional engine has been difficult to meet the new requirements that need the drive motor to involve.The characteristics of the drive motor make full use of low speed and high torque can make up the lack of the power performance of the engine and make the engine work in the area of high efficiency to reduce emissions.With the development and application of rare earth resources,permanent magnet motor has been widely used in new energy vehicles with its own characteristics.In this paper,the foreign motor as the object,use modern design methods and means study the parallel hybrid electric vehicle generator localization.Firstly,Handyscan 3D scanner is used to scan motor end cap.The result of the scanning is point cloud data that need Geomagic Studio pretreatment.Handle the point cloud data well and put it into CATIA and use the reverse modal to surface reconstruction.Finally,most of the errors are control in less than 0.3mm,meet the accuracy requirements.Through the electromagnetic design method calculates the size of the permanent magnet and motor rotor.Then,choose the built-in “V”permanent magnet rotor structure.Through the combination of forward and backward method,the model of motor can be established quickly,and the localization process is accelerated.The second electromagnetic analysis of motor need use Rxmprt module to improve the motor model,know about the electric field distribution,quantitative analysis of air gap magnetic flux density,back EMF and cogging torque,study the basic performance of the motor,and compare the experimental results to verify the correction of computer simulation analysis.Study on the method to weaken cogging torque,puts forward a method of double triangle auxiliary slot to reduce the cogging torque,and proves that the method can reduce the cogging torque by the simulation analysis of the 43%.According to heat transfer theory and fluid mechanics study the heating characteristics of the motor.Choose oil cooling as cooling motor and according to the characteristics of the whole motor to temperature field use simulation analysis and give Shengtu temperature of stator winding and the heating body to understand the temperature distribution of heat source,ensure the temperature meet the temperature limitation in normal operating conditions,combine the result of experiment to verify the accuracy of the simulation results.Finally,the structure optimization design of the motor end cover has changed the size,the position and the outlet direction of the junction box,thus saving the space.The plate structure is designed to make the connection between the stator and the end cover more stable,reduce the vibration in operation and improve the performance of the motor.This paper breaks the traditional design method,reconstruct the motor model by combination of forward design and reverse design technique,this method can speed up thelocalization process of foreign products,great significance to the introduction of advanced technology to domestic motor manufacturing technology,improve the absorption of foreign products,and to enhance the core competitiveness of enterprises.