A study of electrodeless fluorescent lamp's cores of ferrite N87 and IP12E

Power Source Electronic Ballast for Electrodeless Fluorescent Lamps

“…In other gas discharge lamps, the parts with the shortest life are the electrodes, limiting lamp lifespan severely. The electrical parameters of EFLs do not vary excessively with aging, so R lamp increases more slowly than in other discharge lamps [12][13][14][15][16][17][18][19][20]. Table 1 summarizes the electrical parameters of the external inductance EFL lamp (Inducled, Valencia, Spain) GS-150W type.…”

“…They are formed by one or several electromagnetic cores that surround the discharge tube. The ballast excites an electromagnetic field so exciting the internal gas in the discharge tube, which eventually becomes conductive [12][13][14][15][16][17][18][19][20].…”

“…There are two types of EFLs: Lamps with internal excitation coil [9] and operating frequency around 2.65 MHz and those with external excitation coils and an operating frequency around 250 kHz. Resonant inverters provide suitable drive for discharge lamps [11][12][13][14][15][16][17][18][19][20][21]. Their high output impedance stabilizes the lamp power, even without the need to implement a control loop, maintaining high efficiency.…”