Research On High Frequency Wireless Charging System For Dual Load

With the rapid development of modern power electronics technology,high frequency,integration,intelligence,wireless has become the pursuit of modern industry and electronics and other consumer industries.The wireless power supply can effectively reduce the connection of the power cord,improve the sealing characteristics of the power supply,and has the effects of waterproof and dustproof.It has achieved very good results in many applications,such as deep sea operations,robot joint power supply,and electronic consumer products.At present,the single-load wireless energy transmission technology has achieved very good application results in many occasions,but the dual-load and multi-load wireless transmission technology is still in its infancy,especially for the research of high-frequency multi-load wireless charging systems.Development prospects and development value.This subject is based on this research background and carried out a research on the 13.56 MHz dual-load wireless charging system.In this paper,the analysis and derivation methods of high-frequency inverter and rectifier are given to ensure that the system can achieve soft switching characteristics at high frequency,and improve the response characteristics and transmission efficiency of the system.At the same time,this paper also analyzes several effective compensation networks in detail,while achieving higher transmission efficiency,it has the effects of anti-load disturbance and anti-coupling coefficient disturbance,ensuring the stable output voltage gain of the system.In addition,in order to realize the normal operation of the dual-load wireless charging system,the coupling state and working principle of the single load and the dual load are analyzed,and the working state expressions of the single and double loads are given.Finally,simulation and experiment results verify the feasibility and rationality of the proposed dual-load wireless charging system.At the same time,in order to improve the robustness of the system,this topic introduces a high-frequency Boost circuit link in the rear stage of the designed wireless charging circuit,which effectively guarantees the stability of the voltage gain received by the load and can achieve the self-closed loop effect of the voltage at the receiving end.Solved the problem of load competition.In addition,in order to further ensure the stability of the output voltage,the system also introduces a communication link design based on Bluetooth communication to ensure that the energy transmitter and receiver can communicate effectively,thereby achieving a closed loop of the entire system,further improving the system's Work stability.This subject designs and builds an experimental prototype of a dual-load wireless charging system with an input of 5V,a rated output of 5V/0.5W,and an operating frequency of 13.56 MHz.The test results are consistent with the expected indicators.The system is subject to disturbance factors such as load and coupling coefficient.It can maintain stable voltage gain,has a good anti-load and anti-coupling disturbance effect,and supports the switching work of single and double loads.