| As the versatility, portability and sustainable use requirement of power supply in electronic products is higher and higher, the research on wireless power transmission(WPT), especially for the range of middle-short distance, has become more and more urgent. There is no doubt that the middle-short distance magnetically resonant coupling wireless power transmission is a new power supply technology, which has advantages such as electronic products mobility, no contact spark, beutiful atmosphere and no wires exposed relative to the traditional way of power supply. These characteristics make the technique is very suitable for portable electronic devices, power supply in flammable explosive or landscaping environment and other power supply under special conditions. The research and application of this technology will greatly strengthen demostic weak technical sectors on power supply. And the research on the technology of high stability and safety, middle-short distance, high efficiency and high power has very great extensive possibility of application and economy benefit. The method not only can be applied to electric vehicle charging system, wireless sensor system and radio frequency identification devices(RFID), and also in the smart home system, portable mobile equipments, industrial intelligent machine, mines and oil deposits and other fields of great value in both research and application, which also has important implications for the development and popularity of theories and technologies in electromagnetic.This thesis mainly aimed at the research and exploration on middle-short distance magnetically resonant coupling wireless power transmission. The feasibility and high efficiency of the magnetically resonant coupling technology can be verified through the theoretical dialectic, subsystem simulation and optimization, whole system experiment and test. The whole magnetically resonant coupling system for wireless power transmission on printed circuit board(PCB) connecting daily alternating current source has been groundbreaking designed and fabricated. It is important to note that the operating distance and operating energy transmission efficiency of the whole system are the emphasis and focus in the entire thesis.At the beginning part of the thesis, three techniques for wireless power transmission are described and intercompared. Besides, the current background and research situation at home and abroad are also analyzed. Furthermore, the main research work and signifance of the subject are briefly discussed in this thesis.Then, magnetically resonant coupling wireless power transmission model has been theoretical analyzed through the coupling mode theory. And non-compensation resonant circuit and three types of compensation resonant circuits have been theoretical deducated and analyzed separately on the base of Kirchhoff’s circuit voltage equation.And by theoretical derivation and features study, magnetically resonant coupling coil system is investigated on the base of electromagnetic theory. Besides, the load output power, operating energy transmission efficiency and compensation capacitor in compensation resonant circuit have been equivalent circuit analyzed, HFSS simulated and ADS simulated.Furthermore, the application of chip and its working principle in primary driven circuit and secondary rectifier circuit have been determined and analyzed. Besides, the whole structure chart of primary circuit and secondary circuit is given.Next, magnetically resonant coupling wireless power transmission is debugging and testing. Meanwhile, the system can be realized by connecting with daily alternate current when the optimal compensation capacitor and optimal operating frequency are determined.In the end, after summing up the whole thesis, some continuing researches and further improving research directions are also suggested. |
PDF Full Text Request