Research On Lowcost Rail Type Contactless Power Supply

Along with consumption of oil resources and severity of environmental pollution,electric vehicles get the attention of people again. In order to overcome the factors thatrestrict the development of electric vehicles, sunch as short trip range, require of frequentcharging, rail type contactless power supply arises at the historic moment.The first part of this thesis introduces the conception, principle and composition ofcontactless power supply technology, and describes the contactless transformer which isthe core component of the system in detail. To better analyze the performance of thecontactless power transfer system, the transformer is converterted into an electric model,and its corresponding two equivalent models are obtained named mutual inductance modeland T type equivalent circuit model separately.The contactless transformer results in lower transfer efficiency due to its loosecoupling structure. To solve this problem, the resonant compensation is applied intosystem which is regarded as a common method. Based on the fundamentation of manyresonant compensation methods and equivalent model of contactless transformer, the mainparameters of different compensation methods are deduced and the performacecomparision is illustrated.The stuctrue, performance and advantages of I type guide rail contactless powersupply system are analyzed in detail as well as calculation procedure of the mainparamenters. In this system, electric vehicles can be charged through guide railuninterruptly. However, the corresponding cost is high. Threrfore, contactless transformershould be redesigned. Through a series of design and calculation processes, a low cost EItype guide rail contactless power supply system is finally obtained.An experimental platform base on TMS320F28016is built in laboratory to getefficiency results used to verify theoretical analysis.