Bjt push-pull ringing invertors

[myfaithnka]

View attachment 88276

Hi all,

this circuit seems almost retro this days,but no one seems to know how exactly it works.can any one help me understand more about ringing inverters.

On which factor does its frequency depends on ?

How can i design one for a specific power.

please help.

 

[mtwieg]

Looks like a royer oscillator. It's a lot easier to understand if the schematic is drawn more clearly. Such a circuit is often used for driving flourescent tubes.

It's a type of LC oscillator, so its frequency should be determined by the resonant frequency of the load, including the transformer inductance and collector/drain capacitance. These circuits can be difficult to stabilize sometimes, and injection locking is sometimes used to help.

 

[myfaithnka]

mtwieg,

I have googled a bit about royer oscillators,I am living right now in a remote place,electricity from service lines are not available here, i am in need of a cfl lamp to minimise the fuel costs from generator.I can use solar power,as i got a 12 v panel.

it seems royer ckts can be used to drive a cfl tube of 9 watts,but I am not sure how i can start a fresh design. I cant find a good link in internet to learn it.

please tell me more,

please help me.