„Szerkesztő:Fektom/próbalap” változatai közötti eltérés
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41. sor:
Arató: A működéshez szükséges egyenáram miatt egyenirányítást végeznek
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https://www.quora.com/Does-tube-light-work-with-ac-or-dc
As change of flux can be done by AC current, the conventional tube lights work on AC supply.
Flux:
https://www.allaboutcircuits.com/textbook/direct-current/chpt-15/magnetic-fields-and-inductance/
Miért kell AC legyen az erőátvitel?
https://forum.allaboutcircuits.com/threads/fluorescent-electronic-ballast.108684/
The circuit above drives the lamp with DC. That shorten its life
http://www.repairfaq.org/sam/flamp.htm#fb3
(Mindent a ballasztokról)
Current limiting is then done by a very small inductor, which has sufficient impedance at the high frequency.
https://en.wikipedia.org/wiki/Switched-mode_power_supply
Mert a squre wave AC-t még mindig lehet transzformálni.
The inverter stage converts DC, whether directly from the input or from the rectifier stage described above, to AC by running it through a power oscillator, whose output transformer is very small with few windings, at a frequency of tens or hundreds of kilohertz.
Kulcsszó: Power oscillatorral teszik meg!!!
https://en.wikipedia.org/wiki/Electronic_oscillator
Power oscillator
https://www.quora.com/What-happens-if-we-apply-DC-voltage-to-two-ends-of-a-fluorescent-lamp-without-using-anny-ballast-or-any-starter
It depends on the voltage. If it is high enough the tube will light up, but without something (like a ballast resistor) to limit the current it will destroy itself. If the voltage is below the point at which conduction starts (I seem to remember it taking about 600 volts for a 4′ tube) then nothing will happen.
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