Electromagnetic Field Distribution of Electrodeless Fluorescent Lamps and Analysis of Electrical Properties for Solenoidal Induction Coil

摘要

In this paper, the characteristics of the electromagnetic field radiation in electrodeless fluorescent lamp were examined. We have checked that the generation of the electromagnetic field, which generates plasma electric discharging by energizing the gas inside the lamp, is proportional to the size of the ferrite. Also, the electrical characteristics following the increase of frequency for the previous and k-type antenna was examined. By comparing and analyzing the characteristics of the impedance, inductance, reactance and Q-factor following the frequency and the number of coil turns, we have concluded as follows. 1. When the input electricity is increased, the electricity loss increased drastically. Thus, the electromagnetic field radiation towards the inside of the lamp is dependent on the magnetic permeability value of the ferrite, when the used frequency in limited. Also, the strength of the electromagnetic field radiation towards the inside of the lamp changes as the thickness changes. 2. The electricity loss was proportional to the change in frequency. On the other hand, energy was inversely proportional. When the input frequency was at about 900 kHz, the electricity loss and energy had fair value compared to the values at 2.65 MHz. 3. For the impedance, QL-85 Antenna and K-Antenna had a similar value of 319Ω and 324Ω each, when the operation frequency was 2.65 MHz and the number of coil turns was 14. As the number of coil turns is increased, the impedance increases, and when the number of coil turns was 17, the value of impedance went up to 486Ω. 4. For the inductance, QL-85 Antenna and K-Antenna had a similar value of 19.12μH and 19.45μH each, when the operation frequency was 2.65 MHz and the number of coil turns was 14. As the number of coil turns is increased, the inductance increases, and when the number of coil turns was 17, the value of impedance went up to 29.17μH. 5. For the resistance elements of the coil, QL-85 Antenna had a value of 4.39Ω, while K-Antenna had a relatively high value of 7.09Ω, when the operation frequency was 2.65 MHz and the number of coil turns was 14. As the number of coil turns is decreased, the resistance decreases, and when the number of coil turns was 11, the value of resistance was 3.79Ω.