A Magnetic Coupling Resonant Circuit Design Of The Wireless Charging

Wireless power technology (WPT) is a kind of power supply technology developed in recent years. There is a big difference between it and the traditional power supply way. This technology can be through all non-metallic material to transmit electric power. The new wireless power supply can not only upgrade to meter-scale range of wireless power distance, breaking the bottle neck distance of wireless energy transfer, but also allow complete separation of electrical power supply, greatly improving the safety, flexibility, tightness and aesthetics of electrical appliances. At the same time standardized wireless charger can simultaneously charge avariety of portable electronic products(such as mobile phones, digital cameras, PAD, etc.), so it can not only save resources, reduce the cost of the product, but also conducive to environmental protection. This paper mainly carries on the research on the magnetic coupling resonant wireless charging circuit:Then paper analysized the magnetic coupling resonant wireless power transmission mechanism, designed wireless charging emission circuit and receiving circuit, and introduced the work principle and the function of each module used in the circuit. At last, distance transmission characteristics and power transfer characteristics of the wireless charging system were studied in detail. In the experiments, the distance transmission characteristics and the power transfer characteristics of the circuit changed with the inherent parameters of the circuit according to the theoretical rule. The paper focused on the distance transmission characteristics of the magnetic coupling resonant wireless power transmission system. The change rules of the distance transmission characteristics were studied by changing its parameters including capacitance, inductance, line width and some outside parameters including driving signal frequency, driving voltage. The relevant conclusions consistent with theory were summarized and The results showed that the research objective was achieved.