| Since the extensive use of electricity by human beings,related technologies have developed rapidly,and human social life has undergone tremendous changes.But the following problems gradually emerge.Most of the time,power supply cables of electrical equipment become "fetters" and "troubles".Especially when the electronic circuits and systems in living organisms(such as supplying power to electronic circuits in patients),the control between electronic devices,information and data transmission can be wirelessly connected,which prompts human beings to start exploring the use of wireless power supply technology.Technology,throw off the power supply "tail" of electrical equipment,and vigorously study the technology of radio power transmission.With the extensive research and practice of electromagnetic induction,microwave and electromagnetic radiation technology,a variety of radio power transmission methods have been found,and many application examples have been developed.Combining with the needs of the team's new energy technology research project for radio energy transmission,this paper strengthens the comprehensive understanding and better application of this technology,and conducts a comparative study on the common principles and intrinsic physical characteristics of radio energy transmission,especially on the related technology of "magnetically coupled resonant radio energy transmission",which is a new development direction of radio energy transmission technology.A more comprehensive analysis and in-depth study have been carried out.Modeling and theoretical calculation have been done for this kind of technology.The basic laws of radio energy transmission and the constraints between important physical quantities have been obtained,and further verification has been made by using simulation technology and building practical circuits.It not only deepens the understanding and understanding of the technology,and draws some valuable conclusions,but also makes basic preparation and technical reserve and basis for the development and application of radio power transmission technology in the future.The main work of this paper is as follows:(1)Several typical radio power transmission technologies are compared and analyzed.Emphasis is placed on comparing the performance of confusing magnetic coupled resonant radio energy transmission technology with inductive wireless energy transmission technology,and the advantages of magnetic coupled resonant system.Important mathematical relationships are derived.According to the coupling model and basic theory,considering the loss and loss-free conditions,the coupling model equations of LC circuit system are given respectively,and the circuit loss relationship is analyzed.(2)The expressions of efficiency,normalized voltage and transmission distance of magnetically coupled resonant radio power transmission system are calculated,and the conclusion that the transmission efficiency formulas of series resonance and parallel resonance are identical is drawn.How to select the number and radius of coil wire when making the system is analyzed.The effects of operating frequency,horizontal and transverse distance,vertical and longitudinal distance,deflection angle,conductor diameter and conductivity on the transmission of the system are studied.(3)The whole circuit is designed and the magnetically coupled resonant radio power transmission system is realized.The experiment is carried out to verify the correctness of the theoretical analysis.The system input is 15 V DC voltage,555 time-base circuit is used as waveform generation circuit,and parallel resonance mode is adopted to produce solenoid coil with 4 turns and 9 cm radius.Under the conditions of over-coupling,critical coupling and under-coupling,the characteristics of system operating frequency,horizontal and transverse distance,vertical and longitudinal distance,deflection angle,conductor diameter and conductivity are experimentally studied,and conclusions are drawn from the experimental results. |
PDF Full Text Request