Progress and Prospect of Contactless Power Supply Technology in Rail Transit

By avoiding direct contact between the power supply and train, the contactless power supply technology overcomes the drawbacks effectively of disconnection, contact spark, line wear, lightning interference power, electric shock and other accidents of contact type power supply mode, which helps to solve the problems of power supply equipment redundancy and security, greatly improving the reliability of the power supply system and providing new methods to improve the traditional power supply in the rail transportation field. The wireless power transmission scheme of rail transit is briefly described. On the basis of introducing the working principle of electromagnetic coupling radio power transmission technology, the research status of radio power transmission technology in rail transit application are summarized. Several key scientific problems in the application of wireless power transmission technology in rail transit are discussed, including high-power and high-frequency resonant inverters, sectional power supply technology, design of efficient coupling electromagnetic mechanism, resonance network and system modeling, and robust control of energy transmission. Electro-magnetic coupled radio power transmission technology and its application in rail transit are currently a research hotspot, which is expected to solve many problems of rail transit’s contact power supply.