Kapanadze Cousin - DALLY FREE ENERGY

[Void]

In case of the latter - do you want the phase shift to stay fixed as the output frequency of the TL494 is varied ?

Hi Verpies. On second thought, it would be quite useful to have a phase shift circuit which triggers off an output
of a TL494, and which maintains a constant phase shift as the TL494 frequency is adjusted up and down.
Typical frequency range of the TL494 we are testing with is in the range of about 10 kHz to 35 kHz, but if such
a phase shift circuit can work with an even wider TL494 frequency range, that would be a bonus. I plan to test with
the  TL494 circuit you have posted in this thread previously (attached). If you do have the time at some point
to design such a circuit which can adjust phase shift from at least 0 to 90 degrees, and which will maintain it's phase
shift setting as the TL494 frequency is changed, that would probably be of very good use to anyone here who is using
the TL494 or similar as their PWM chip. If you are busy, then no problem.

[verpies]

If you do have the time at some point to design such a circuit which can adjust phase shift from at least 0 to 90 degrees, and which will maintain it's phase shift setting as the TL494 frequency is changed, that would probably be of very good use to anyone here who is using the TL494 or similar as their PWM chip. If you are busy, then no problem.

Please help Itsu with his push-pull problem.  That will free us to do just that.

[verpies]

Enable at 12V should be fine, see specs.

I see the footnote #3 now : "whichever is larger" so 12V should be fine.

Shorting both secondaries and measuring one primary gives 5.7uH
Shorting the other primary too then gives 4.5uH

That's significant. You can jusge the coupling coefficient of your transformer by these numbers.
I usually keep the leakage inductance below 1μH with special winding techniques.

So the spikes caused by this leakage inductance present a real danger to your MOSFETs in the form of exceeding its maximum drain to source blocking voltage.

What is the leakage inductance measured with only one half of the primary shorted?

[verpies]

Enable at 12V should be fine, see specs.

I see the footnote #3 now : "whichever is larger" so 12V should be fine.

Shorting both secondaries and measuring one primary gives 5.7uH
Shorting the other primary too then gives 4.5uH

That's significant. You can judge the coupling coefficient of your transformer by these numbers.
I usually keep the leakage inductance below 1μH with special winding techniques.

So the spikes caused by this leakage inductance present a real danger to your MOSFETs in the form of exceeding its maximum drain to source blocking voltage.

What is the leakage inductance measured with only one half of the primary shorted?

[itsu]

Please don't spend to much time on this minor problem, afterall, the thing is doing what it suppose to do creating lots of reactive power in the secondary series LC /inductor.



Releasing the secondary shorts, and measuring one side of the primary gives 58.8uH.
Shorting then the other primary gives 17.2uH

Itsu