| Compared with the wired way,as an epoch-making invention,wireless power transmission(WPT)technology has brought many conveniences to human production and life,and its versatility are more popular among people.Compared with many WPT transmission types,the magnetic coupling resonance wireless power transmission(MCR-WPT)technology has high transmission efficiency,safety and reliability,and can get rid of wire constraints.The improvement of system power efficiency has become one of the research hotspots at home and abroad.This article discusses wireless power from the perspective of coil optimization.The transmission efficiency of the transmission system is researched and demonstrated.Firstly,this paper introduces the system structure,working principle and development status at home and abroad.Several types of WPT are compared,and MCR-WPT is selected as the research object to study its transmission characteristics.Secondly,each module of MCR-WPT system is introduced,the equivalent coil circuit model is analyzed,the application range of different capacitance compensation structures is introduced.Then,the coil body is studied from the perspective of coil optimization.The influence of coil parameters such as material,turn spacing and quality factor on each other is studied.The magnet simulation software is selected to verify the theoretical analysis.Finally,from the perspective of wireless power transmission efficiency,the maximum transmission efficiency of the two-coil and three-coil structure system is analyzed and compared,and it is concluded that the two coil structures can reach the same maximum transmission efficiency under different transmission distances.The application of transmission has certain reference value in daily life;For the three-coil structure,the influence of mutual inductance on the transmission efficiency of the threecoil structure system is explored;in order to meet the user’s requirements for space position,this paper also analyzes the system power transmission efficiency from the perspective of the coil resonance structure,that is,the space structure,and proposes The four-coil structure wireless power transmission system analyzes the influence of the distance between the coils on the transmission efficiency.The simulation analysis and experimental results show that within a certain range,the greater the coupling coefficient between the source coil and the transmitter coil,the greater the system transmission efficiency... |
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