Soft Switch Control Technology Of Inverter For Electric Vehicle Wireless Power Supply System

As new kind energy vehicles, electric vehicles have the advantages of low-carbon,non-polluting, and environmentally friendly cleaning, etc., which is widely recognized as an important future direction development of new energy vehicles. Currently, electric vehicles existing poor endurance capacity, requiring a longer time on a single charge,and spending a lot of time during the charging process and other issues. Besides, there is a certain security risk during its charging process. Electric vehicle wireless power transfer technology(Wireless Power Transfer Technology), as a new electric vehicle power real-time supply technology, has brought a lot of convenience for the development of electric vehicles. With the help of wireless power supply technology,electric vehicles can get energy from the rail road lying in the bottom by electromagnetic technology, which can reduce the amount of car battery or even without carrying the battery. However, electric vehicle position and speed are changing during the running process, as a result, the rail inductance change, position migration and other issues which caused the electric vehicle control is more difficult. Therefore, an urgent need for an effective and feasible control programs to address the problem of controlling a variety of factors affecting the electric car wireless power supply system encountered.In this paper, a electric vehicle wireless power supply system is concerned as the research object, by analyzing the various components of electric vehicle wireless power supply system, making clear the functions of each parts and design ideas, giving out a complete electric vehicle wireless power supply system topology. For position changing and the offset of coupling mechanism, this paper analyzes the soft-switching and efficiency in detail to identify the influence of soft switching parameters, and through modeling and analyzing, making clear the frequency changing range. By comparing the soft switching tracking control scheme based on the primary side of the inverter frequency with other schemes and the feasibility studying, ultimately proposed based on staging policy floating frequency tracking soft switching scheme, the simulation results demonstrate that the feasibility of this scheme. Through the relevant circuit design and device selection, etc., making full preparations for the experimental platform, and finally through building experimental platform and applying the scheme to the electric vehicle wireless power supply system. Through the analysis of experimental data, whichis well verified the feasibility of the scheme.