Research On Wireless Power Transfer System Based On Resonant Coupling

In2007,the Massachusetts institute of technology’s scientists using electronmagnetic resonance principle,use two apart2meters of copper wire circle,successfully through wireless transmission light electric energy to power a60watt light bulb,thus raised the research wireless transmission of power technology boom.Resonance coupling is a new technology for wireless power transmission,which using the electromagnetic resonance coupling principle,this technology integrated application of high frequency inverter technology,resonant compensation technology,resonance coupling technique,high frequency voltage finishing filtering technology and so on,through the two have same resonance frequency of the coil produce high frequency magnetic alternating coupling realize power at a distance transmission range.Compared with the traditional connection type electric power transmission technology,this technology is more flexible,safe,reliable,can realize the power supply equipment and electric equipment of intermediate distance between power transmission,have no direction,through the gender is strong,etc.Because the present resonance coupling wireless power transmission technology is still in the initial stage of development,the domestic relevant theoretical analysis and experimental research is still relatively lack,and influence factors of the system transmission characteristic too much,the transfer of the power transmission efficiency and transmission,the distance from the practical application and gap,to ensure that the system to achieve good transmission effect,takes into account system of each section of type selection and design,analysis parameters on the effect of the transmission characteristics.Based on this,this paper introduces the resonance coupling wireless power transmission system of main link type selection and design,through the contrast analysis parameters on the system transmission power,transmission efficiency and the effect of the transmission distance,and production test mode is verified.This paper mainly completed the following content:1.This paper introduces the current several main power wireless transmission technology(including electromagnetic induction type,microwave type,resonance coupling type)at home and abroad and the research status.According to the current domestic related theory and the experimental research on the present situation of lacking,in this paper,this paper studies the purpose and the significance and the main contents.2.From the aspects of physics resonance coupling wireless power transmission system,the system emit electromagnetic fields is divided into the the near and far magnetic filed area.And then introduced resonance coupling wireless transfer system principle and system structure,and analyzes the key technologies involved system:high frequency inverter technology,resonant compensation technology,resonance coupling technique,rectifier filtering technology.3.Detailed introduces the resonance coupling wireless power transmission system and the main circuit of the selection of the design,and every part of the system is given general design guiding measures.4.Main through the contrast experiment to analysis,this paper analyzes the influence of power and the transmission efficiency of transmission system of relevant factors,the effect factors of the transmission distance experimental analysis.5.Through the LTspice software to launch the system simulation analysis for specific provide direct basis for the selection of the instruments.The first stage we analysis and test on small prototype,and find out the restricted the transmission distance and the cause of the transmission efficiency.The second stage test model in the first phase of the prototype based on improved,expected to achieve good results.Finally the resonant design of wireless transmission coupling power drive small motor system,and through experiment,the experimental results verify the feasibility of the prototype.