Research On Wireless Power Transmission For Scene Lighting

In the scene lighting system,there are a lot of low-power light sources that move frequently.If the technology of wired power supply is used,the problems of complexity and inconvenience of movement will be difficult to be solved.However,the spatial electric-field is not closed in space and without fixed directivity.If the spatial electric-field can be used to power the low-power scene lighting sources,these troubles can be avoided.By means of spatial electric-field,the power transmission is not limited to a certain fixed Angle and direction,which makes the mode of power supply more flexible.Firstly,the research background and current situation of space electric-field wireless power transmission at home and abroad is described in this paper,then the application background of this paper----scene lighting is introduced briefly.After that,the bipolar Marx circuit designed in this paper is introduced,which used power electronic equipment substitute Tesla coil to produce high-frequency and high-voltage.This circuit is designed to convert 0~200V DC input voltage into the AC output with the amplitude of 0~4000V/8000 V and the frequency of 0~100kHz/50 kHz,and the working principle and method of the circuit design are analyzed in the following.The lumped circuit model was established for the high-frequency high-voltage power supply,space electric-field and receiving devices.According to the actual working conditions,the circuit model is simplified reasonably,and the simplified circuit model is used to analyze the formula of output voltage amplitude-frequency characteristic and the resonance frequency of the receiving devices.The distribution characteristics of the electric-field generated by the bipolar Marx circuit in space are analyzed by the software called COMSOL,and the conditions of different energy harvester at different circumstances were studied.The structure of the high pressure emitting plates were improved,and the grid electrode was used instead of the plate electrode to reduce the material waste.According to the required frequency,the design process of the energy receiving device is analyzed,and the parameters.Finally,the energy received by the energy harvester is used to light the scene lamps.