Research On The Magnetic Coupler Of Electrodeless Fluorescent Lamp By Modeling And Simulation Experiments

The electrodeless fluorescent lamp is a new-type light source which has been developing in recent years. It has many advantages, such as longevity, high luminous efficiency, no stroboscopic phenomenon, high CRI, wide colour temperature, and so on.Although the electrodeless lamp has many advantages,but there are still shortcomings.High frequency generator of electrodeless lamp is easily affected by temperature and humidity. Application is limit in the harsh places,this is a problem which most light source engineer cares about all the time.This topic starts analysis and research of high frequency generator of electrodeless fluorescent lamp in this context. Try to through the study of matching resonance parameters in high frequency generator to improve the stability of the high frequency generator.High frequency generator include the EMI filter, rectifier module, power factor correction module and inverter resonant circuit.Resonant circuit and electromagnetic coupler as an important link for the glow stage of electrodeless lamp, their steady work directly affects the lighting of lamp.This topic mainly study the following work:1)Based on the equivalent model of high frequency electrodeless lamp and coupler and the equivalent model of foam body modeling of high frequency inverter circuit, obtain the equivalent model of the inverter resonant circuit and the transfer function of output, simulate its resonance state,analyses the resonant parameters and coupler parameter change on the influence of the resonance point.2)Magnetic coupler as a key part in the resonant circuit, simulate its magnetic field,select the coupler which continuous winding for the subsequent experiment.3)Analyze the influence of temperature on the coupler, get the inductance scope of coupler under the electrodeless lamp working temperature.4) Study the Q value of resonant when the three kinds of resonant parameters within 10%,and analyse the combination by the orthogonal test,get the influence degree of the three parameters on Q value.5) Change the resonance parameter values,then measured the illuminance in the same measuring distance.Finally get the range of the illumination.Finally, summarizes the whole research.When the variation range of three resonance parameter within 10%, the Q value relative changes of 0.6%-0.6%, horizontal intensity of illumination variation changes of 1.6% to 17.1, vertical illumination variation change of 1.3% to 1.3%.