| Magnetic coupling Wireless Power Transfer(M-WPT)technology uses magnetic field as the transmission medium to realize the non-contact transmission of power from the power grid or battery side to the load side.M-WPT technology has become a research hotspot due to its advantages of mature technology,stable system and small impacts on the electromagnetic environment.It has been widely used in many fields such as household appliances,bio-medical treatment and electrical vehicles.With the development and application of M-WPT technology,when realizing the transmission of electric energy without wires,in order to improve the performance index and obtain more reliable operation of the energy transmission system,the information interaction between the primary and secondary sides is often needed.Thus wireless power and signal transfer(WPST)technology also emerges at the right moment.WPST technology is to realize parallel transmission of signals through energy coupling mechanism in M-WPT system.Electricity and signals in shared channel WPST technology are transmitted by the same coupling mechanism,which has attracted more researchers’ attention.In this paper,a multi-objective optimization parameter design method is proposed for the shared channel WPST system--which realizes signal transmission based on partial electricity coil in M-WPT system.Firstly,we analyze the composition and principle of each part in the studied system of power transmission channel and signal transmission channel.Second,this paper establishes the unified system parameter model of the shared channel WPST system based on impedance analysis methods.Then on the basic of the study of resonance points in signal transmission channel it is established that mathematical relation between system parameters and performance indicators by using the transfer function.For the unified parameter model of shared channel WPST system,we analyze constraints,the decision variables and objective function of the system.It is proposed that multiple constraints and multi-objective parameter design method,in which NSGA-II algorithm works as the core.The key parameters of half-duplex and full-duplex signal transmission channel of the unified parameter model are respectively designed.Finally,the optimization design of relatively optimal solution is used to choose a set of relatively optimal solution as the simulation parameters.Bode diagram is drawn for research and analysis.It is built that the simulation model of the system of power transmission channel and signal transmission channel in Matlab simulation software.The results validate the effectiveness of the proposed parameter design method. |
PDF Full Text Request