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Research On Wireless Charger System Of Electric Vehicles Based On Double-side LCC Compensation Topology

Posted on:2021-02-21Degree:MasterType:Thesis
Country:ChinaCandidate:X P LiFull Text:PDF
GTID:2392330605468470Subject:Electrical engineering
Abstract/Summary:PDF Full Text Request
At present,with the energy crisis and environmental problems increasingly prominent,electric vehicles by virtue of its energy-saving,environmental protection,low noise,fast start speed and other advantages are favored by people.Wireless Power Transfer(WPT)is a charging method for electric vehicles.Compared with contact Power transmission,it can effectively avoid the problems of plug wear and leakage which caused by Power plugging and unplugging,and make charging more convenient and flexible.However,the early Wireless Power Transfer technology was limited by power and efficiency.In recent years,with the development of power electronics and control technology,it is possible to transmit high power and high efficiency Wireless Power Transfer.With the advantages of flexibility and security,wireless power transfer has been widely concerned by researchers and has a broad prospect in the field of electric vehicles charging.Inductive Coupled Power Transfer(ICPT)is realized in a gap between the primary coil and secondary coil,is one of the main way to realize the wireless power transfer.However,with the air gap increases,the magnetic flux leakage will increase and the coupling coefficient k will be low,increase of reactive power.In order to solve this problem,the compensation topology of ICPT system is very important.Focusing on the Double-side LCC compensation topology,this thesis mainly research on the following aspects:Introduce the affect of compensation circuit of the ICPT system.The four basictopologies was analyzed through theoretical derivation,the characteristics of a Double-side LCC compensation topology,analyzed the Double-side LCC compensation topology of electricity transmission characteristics,this thesis proposes a way to make the primary side ZVS soft switch by adjusting the parameters of secondary side capacitance.A flat plate circular coil is designed as coupling mechanism for wireless power transfer.The influence of the spatial position change of the primary side coil and the secondary side coil on the coupling coefficient k is analyzed through the simulation of the electromagnetic simulation software ANSYS Maxwell and test of the experimental result.A simulation model of wireless power transfer system based on Double-side LCC compensation topology is built on LT-spice circuit simulation software.An experimental with input power of 10 k W input voltage of 800 V DC and output voltage adjustable by synchronous rectifier BUCK is designed.The experimental results verify the correctness of the theory and simulation.The efficiency of the whole sample machine is about 91%,it is proved that the Double side LCC compensation topology can prove the efficiency requirements of the Wireless Power Transfer of the electric vehicle at 10 k W power level.
Keywords/Search Tags:wireless power transform, ZVS soft switch, LCC topology, electric vehicle
PDF Full Text Request
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