Researchon Key Technology Optimizationof Automotive Magnetic Continuously Variable Transmission

Traditional mechanical continuously variable transmission (CVT) has a complicated structure. During the transmission process, the master and slave wheels rub against each other to produce chattering and heat loss, and the master and slave wheels are seriously worn. In order to improve the transmission efficiency and reliability of continuously variable transmission, Automotive magnetic CVTs (Manetti Continus, Livaria, Breitlans, Mack) were used as research objects. By establishing the efficiency model of key parts, the relationship between the efficiency of each component and different parameters is transformed and calculated, and then it is optimized using Matlab. The finite element analysis of a permanent magnet eddy current speed regulating device is carried out by using finite element Ansys Maxwell, and the relationship curve between the average meshing area and each parameter is analyzed. The results show that the volume of the optimized gear train is reduced by about 51.7% compared with that before optimization, and the loss of MCVT is only 1.4KW under the condition of full engagement of the magnetic ring with the maximum power of 110KW, and the energy transfer efficiency can reach 98.7%, which greatly improves the working efficiency compared with the traditional mechanical CVT.