Lenzless resonant transformer

[Jack Noskills]

Problem is that impedance is not high enough in your primary. The wire that earlier was used as primary was on looped core. Looped core has much higher impedance than rod core so now your primary is leaking. Even if you don't put anything in the output, idle current is still way too high.


Did you test with load ? If so, are you sure you connected the output wires correctly together ? When they are wrong there is nothing going in the load.
Voltage increases when power is taken. You can verify this by putting voltmeter in one output coil and then short the other output. Amperage also increases. Do these tests using your 12 volt setup.


If you can add turns to your primary and later test using 120 volts, then put current limiter in your primary side. A capacitor or a light bulb. Then your primary does not get hot if impedance is not high enough.


Yesterday I tested using shorter primary using resonance and it did not work. If you frequency is fixed to 60 Hz then only way to increase impedance is to add more turns in your primary.


For me this has worked best when impedance in primary is high even without capacitors. When I found suitable amount of turns I try with capacitor.


Now I am not sure if there is turns ratio that controls the output or something else. There is clearly turns ratio in effect when capacitors are not used.


So far my output power levels are low, atmost 15 watts out, a guess. I don't know if this can be scaled up, but if I can get it close to 30 watts then it is good enough to power a PC. At the moment it is good enough to power a cell phone.

[kingscom]

Hi Jack Noskills

I am new member and i am interesting to see a snapshot of one of ur current project, u can use a camera phone to take a picture, it will give a lot of idea what u discribe on ur pdf, with picture, i mean real project picture it will help to figure out there idea what u r doing,

Can i use iron core or ferrite core, which one is best to use? or fly back core, i have a flyback core in attachmemt can u check it can be use.

thanks

[verpies]

This proves that my setup is good enough to detect changes in power usage at the source. So, if I can light up 18 watt worth of light without a sign of light in the primary side tells me something good is going on here.

Wrong.

Penno64's video should've made you realize where the error is.

[Jack Noskills]

Wrong.

Penno64's video should've made you realize where the error is.

I watched the video and did not notice any error, can you explain what was wrong ?
Any idea what would happen in the primary when the load is disconnected ? Would primary go out of resonance and light there would lit up again ?

[Jack Noskills]

Hi Jack Noskills

I am new member and i am interesting to see a snapshot of one of ur current project, u can use a camera phone to take a picture, it will give a lot of idea what u discribe on ur pdf, with picture, i mean real project picture it will help to figure out there idea what u r doing,

Can i use iron core or ferrite core, which one is best to use? or fly back core, i have a flyback core in attachmemt can u check it can be use.

thanks

If you can play with frequencies I recommend ferrite E-I. Then you can quickly make tests using less wire and learn it. With E-I there are 3 coils working together and it is better than 2 coils.


Your flyback looks fine, except there is something that look like air gap.


I started like this. First no capacitors and wound only primary. Enough turns so that impedance gets so high that current is blocked at frequency above 10 kHz. Next I put same amount of turns in secondaries and tested without capacitors. When it looked ok I started to use capacitors and look for resonance. First in secondary and then in primary to match frequency I found.