The Research Of High Reliability Power Supply Technology For Railway Wagons

the trend is that railway wagons will be monitored by intelligent electronic monitor and protection equipment in order to ensure the safe operation.Due to the problem of railway wagon maintenance system,there is no power supply on railway wagons,which makes some sophisticated electronic monitor and protection equipment can’t be used on railway wagons.thus, high reliability of power devices for railway wagons has been the research hotspot.in this paper,the power supply device based on vertical vibration of the vehicles is designed.The permanent magnet linear generator is installed near the position where the vibration is strong relatively,which transforms the vertical vibration energy into electrical energy when the train is running.According to the k6bogie and vibration when it is running,the power supply device is installed near the central suspension.the vibration is analyzed,the working principle of permanent magnet linear generator is analyzed,the mathematical model of permanent magnet linear generator is bulit,the characteristics of the generator load is analyzed,the equivalent load of the generator output under different conditions is determined.According to the output conditions of the generator and requirement of the load,the electrical system of the power device is designed.Generator output is rectified by three-phase uncontrolled rectifier,and BOOST circuit will be used to upgrade voltage to charge the supercapacitor.According to the characteristics of supercapacitor,the PWM control strategies for BOOST circuit are analyzed and compared,The results showed that peak current-mode PWM control is better than voltage PWM control.Based on peak current-mode PWM control, the storage circuit is designed.The master chip of charging circuit is UC3843A,Self-powered circuit is MC34063.Due to the discharge voltage is rather changeable,the voltage-stabilizing circuit is designed.The results show that the power supply device can meet the requirements of low-power electronic devices on railway wagons,which is helpful to improve the operational safety of railway wagons.