Research And Design Of Wireless Power Supply Device For Lighting Equipment

With the improvement of our national economic level and the continuous development of science and technology,the update of electronic equipment is getting faster and faster.Consumers not only focus on the practicability of electronic equipment and household lighting equipment,but also put forward new requirements on the beauty of products.Wireless transmission technology is a new transmission method that has great impact on batteries and traditional transmission technology.This method does not have scattered wires and does not pollute the environment as batteries do.Especially magnetic coupling resonance wireless transmission,because its transmission principle is to transmit energy through resonance,so it has a long transmission distance and a high transmission efficiency without generating radiation.The purpose of this paper is to design a set of lighting magnetic coupling resonant wireless power supply device,the results show that the set of power supply device with high efficiency and good load degree of lighting in system frequency of 7.38 MHz,the distance between the two coils less than 70 cm,the radial distance is not more than 7 cm and the coil relative angle is less than30°.Firstly,the topology,coil form and coil parameters of the resonant coil of the system are analyzed.After selecting the model,the efficiency expression of the coil system is derived based on theoretical knowledge and several factors affecting the efficiency are obtained.Secondly,the overall design idea of the experiment and the composition and working principle of each part are described,the specific topological structure used in the design process and the selection of each component in the process are determined,and the design and construction of the experimental platform are completed.According to the established experimental platform,the wireless power supply of lighting equipment is realized.By changing several factors that affect the transmission efficiency,the transmission characteristics of the coil resonance system are obtained,and the applicable scope of the entireexperimental platform in real life is further studied and summarized.Finally,in view of the design of lighting equipment,on the theory of maximum power transfer theorem basis,using the MATLAB/simulink software simulation to the whole optimization system,the DC-DC impedance matching module is optimized by means of equivalent impedance change system.The results show that the optimization method can make the system compensate for the shortage of the system under abnormal power supply to some extent.