The Research Of Magnetically-Coupled Resonant Wireless Power Transfer Technology

Based on the wireless device capable of transmitting technology refers to the power transmitter and the receiver does not need to metal wires for electrical power transmission device.It is the source and the corresponding load separation, not only convenient to use, and eliminate the switch contact in the process of power transmission and electric spark that may produce when closed. It is strictly prohibited to fireworks can radio transmission technology application is more safe and reliable. Magnetic coupling resonant radio transmission technology as an important branch of radio can transmit technology, there are further transmission distance, higher efficiency, good penetrability, etc. So the study of the technology quickly became the various countries’ scholars research hot spot. The study of the technology has made greater progress, but in the transmission theory, the source voltage inverter, the resonance frequency of tracking, coupling coil, the respect such as electromagnetic radiation remains to be further research.In this paper in view of the magnetic coupling resonant radio transmission technology research, main contents :Firstly, detailed analysis of the magnetic coupling resonant radio transmission mechanism, and established the system according to the theory of mutual inductance coupling circuit model, analytical reasoning out the main factor that can affect the radio transmission performance.Secondly, The circuit of the entire power transmission system are analyzed, under high frequency signal in a coil self-induction effect and skin effect and around the characteristic has carried on the theoretical analysis, found a can make the best of electricity transmission coil structure; Resonant capacitance and equivalent inductance coupling coil is studied in different combinations of capacitance, the highest power conversion efficiency of the circuit structure is put forward.Again, Under high frequency signal in a coil self-induction effect and skin effect and around the characteristic has carried on the theoretical analysis, make the best of electricity transmission coil structure; Resonant capacitance and equivalent inductance coupling coil is studied in different combinations of capacitance, the highest power conversion efficiency of the circuit structure is put forward..All kinds of power amplifier is analyzed in detail the principle of the circuit and the working point waveform diagram, provide the basis for selection and design of power amplifier scheme.According to the theoretical analysis for the whole system prototype design, puts forward the design method of system modules and the various components and chip selection basis, design prototype system output parameters for the 6 V / 3W.