Research And Design Of Railway Passenger Car’s DC600v Power Supply

With the development of national economy and the improvement of people’sstandards, passenger trains had fitted with air-conditioners, electric waterheaters, refrigerator, color TV and other electrical equipment. The train’spower consumption is increased, the capacity and quality of the power supplyequipment is enlarged. It causes more demands to the passenger car’s DC600Vpower supply.In this paper, in order to improve the lower Power Factor, output voltagefluctuations and other defects of the existing DC600V power supply, with thecurrent development status of train power system at home and aboard, theperformance of the Rectifier circuit and the Chopper circuit are analyzed. Thesolution of ‘the rectifier Diode+IGBT buck chopper’is designed. Themechanical structure of the DC600V power supply is designed and the maincomponents are selected.By PSIM software, the work cases of different input voltage with differentload of the main circuit are simulated. The results show that ‘the rectifierDiode+IGBT buck chopper’makes the output voltage stabilized between580-620Vin0.3s,the Power Factor achieve0.9. It solves the main defect of the existingDC600V power supply device and be able to reliably ensure the normal workingof the electrical facilities.The DC600V power supply in this paper has a stability output voltage andhigher Power Factor, it can significantly reduces the heavy fines caused by lowerPower Factor of railway, also can makes a good use of the limited power supply resources, should be widely used.It can providing preliminary solutions andtechnical support for the existing DC600V power supply’s renovation work ofrailway technical department.