Help with frequency generator

[dragon]

How are you sizing the L & C? Are you sizing them for resonance @ 60Hz or are you shooting for a particular value of L (+) or C (-) reactance?

This one is actually set to run at about 73hz with the 49mh primary and 96uf cap but it actually runs at 130 to 180hz within the circuit and displays some interesting qualities. That was my original goal to match the 60hz but it actually worked out much better set slightly off resonance.
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[TanTric]

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dragon, what i want is to drive a transformer with a battery, putting 12V x 1A and geeting out 220V at 55miliAmps (lamp onload) ... with a good efficience, just that...

can you guys help me with the ratios?

i have tryed a ferrite core transformer, with primary and secondary resistance very near to the values of my 60Hz iron transformer... guess what?

worst performance, only 75VAC onload (25W lamp, less 10V that with the iron transformer)... should i try air core?

anyone with skills can help with the best ratio of resiatance, gauge and core to use in my specific set up?

i would like to make a video tommorrow with what im testing,

hugs and thank you all

[TanTric]

scope

i took a scope shot of the best performance i got with the transformer...

if im not in error, im driving the transformer at 20Khz much bright lamp at load that compared with 50Hz, im not shore if its really 50Hz i can get, because in my software the values start to fluctuate a lot and dont stop in a precise value... im just starting to learn how this works!

what do you brothers think of this?

EDIT: what should i change in my circuit so i can reach 60Khz? hugs

[Joit]

I even dont know, if your Sondcard can show more Frequency as 20k hz, because its the limitation of the Cards, most work only till 44khz.
But 60Hz, as they mention at the Kapanaze Device or similar are at the Second,
so it would be 3600 hz at a minute.
I dont know, which Frequency this Program shows, Minutes or Seconds,
but it looks like this what you got is to high.
Usual the Capacitors adjust the Frequency, lesser the Coil, so you may wanna try a big one from a Tv or your Microwaveoven with 0,9µF, small one would be enough there are only ~10V, at the Timer, that you can do lower Frequencys.

[Joit]

Here are 2 more Schematics for an Inverter
Free Schematic Diagram at www.circuitdiagram.net
12Vdc - 120Vac Inverter

[TanTric]

=)

@joit, i will try it!!


thank you, you r the men!


will post a video this night of my experience with transformers and showing some scopeshots!!

[TanTric]

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someone can help? what i can do in my variable frequency generator, so it can reach values lower as 50Hz, and higher as 60Khz?

pleasE?

[sucahyo]

someone can help? what i can do in my variable frequency generator, so it can reach values lower as 50Hz, and higher as 60Khz?

Change your C2 to a digit smaller or bigger capacity.

[TanTric]

hmm

thanks for reply suchayo...

i have allready tryed 0.01 uF , 0.1uF, 1uF

more bigger the cap, more lower the frequency, more smaller the cap, more higher frequency?

i get that, but the problem is that my 50Hz sinewave transformer is only working good at high frequencys, at the lower frequencys the performance is worst, so that made me think i was not getting as lower as 50Hz.

Maybe the problem is im sending square wave instead of sine?

[TanTric]

this video goes to dragon, Joit, citfta, sucahyo

YouTube - TRANSFORMERS

thank you brothers!

[sucahyo]

but the problem is that my 50Hz sinewave transformer is only working good at high frequencys, at the lower frequencys the performance is worst, so that made me think i was not getting as lower as 50Hz.

Congratulation .

Sorry, I overlooked this thread. It is possible that your circuit happen to resonate at higher frequency than what the coil resonant. Maybe the transistor happen to work better at high frequency because the 555 produce the best output at that frequency.

My circuit seems to follow the coil resonant though. It seems to give best output at around 50 Hz. Maybe you need to vary duty cycle / frequency or improve the transistor.