Research On Modeling And Control Strategy Of Omnidirectional Wireless Power Transmission System

In recent years,with the development of science and technology,wireless power transfer technology has gradually brought attention to the public,becoming a popular technology.After a few decades,wireless energy transmission technology has developed many mature technical forms.Among them,Magnetically-coupled Resonant Wireless Power Transfer(MCR-WPT)is considered to be one of the most promising wireless power supply solutions.It has been applied to many fields.However,at present,the existed mature wireless energy transmission technology cannot break through the two major bottlenecks of short distance and limited receiving position.Thus,many researchers are proposing omnidirectional wireless energy transmission technology.The omnidirectional wireless energy transmission technology aims to develop a wireless energy transmission system,in which the receiving end is able to move freely without affecting the wireless power transfer process,having a certain transmission range and carrying capacity.This paper will mainly study the modeling and control strategy of the omnidirectional wireless energy transmission system.Firstly,starting from the most basic magnetic coupling resonance wireless energy transmission,deeply analyzes the characteristics of the magnetic coupling resonance wireless energy transmission system;studies the coupling relationship between the transmitting coil and the receiving coil through the electromagnetic field theory,and gives the coil The theoretical research and practical design methods of mutual inductance.Then,according to the coupling theory,a three-dimensional orthogonal transmitting coil structure is introduced to explain the principle of generating an omnidirectional magnetic field and how this structure can realize the transmission of omnidirectional wireless energy.Secondly,a spatial energy transfer topology model is established based on circuit theory.The circuit mainly includes a transmitting end based on a three-dimensional orthogonal coil transmitting structure,A multiturn receiving coil whose center normal direction points to the center of the transmitting end,series connection type compensation is used for both receiving and transmitting ends.To study the transmission characteristics of the omnidirectional wireless energy transmission system through circuit modeling,and give a theoretical analysis to control the stable transmission of energy.Finally,the high-frequency bridge inverter circuit and Buck-boost buck-boost chopper circuit are designed,the simulation model is established,the simulation analysis is carried out,and the independent adjustable stable high-frequency square wave voltage source is designed.The mutual inductance between the three-dimensional transmitting coil and the receiving coil is simulated and analyzed,which verifies the correctness of the coupling structure theory proposed in the theoretical analysis.At last,the simulation model of the entire omnidirectional wireless energy transmission system is built to verify the applicability of the designed omnidirectional wireless energy transmission system.