Based on the application of permanent magnet traction technology,this paper analyzes the prominent problems in the operation of original asynchronous traction system of metro vehicles in China.Combined with the various advantages of current permanent magnet system,the necessity of vehicle upgrading is analyzed.The scheme of upgrading the asynchronous traction system to the permanent magnet traction system is presented.After the upgrading,the rated power high efficiency area of traction motor is increased from 60%to 85%,and the average energy consumption of the train can be reduced by more than 30%.The benefits of life extension and energy saving can fully cover the cost of system replacement.
维普
万方数据