RESONANCE EFFECTS FOR EVERYONE TO SHARE

[TinselKoala]

Huh? I replied to your video, above...but you didn't answer my questions. ??

I just checked my unit with the following parameters:
Logic power from a 11.4 volt battery--draws 26 milliamps when quiescent, a little more when working.
Bridge power from an HP benchtop supply, 50 volts DC, current limited at 100 mA.
No load on bridge. (I disconnected my LEDs for this test.)
Clock from a function generator, square wave, 700 kHz.

Current draw from bridge supply: 30-40 mA, depending on frequency. The draw is very small at low freqs, peaks at around 300 kHz, goes down, then peaks again at 700+ kHz.

So I am confirming your result, but I can't explain it, unless we are experiencing "shoot-thru" or some other weird leakage phenomenon. But I thot the driver chips were supposed to prevent that. Oh well.

[Groundloop]

Luc,

Thank you for making the video. It is a great video and it clearly demonstrate what we where talking
about in private mails. It seems to me that your circuit (two coils) is outputting more Watt than
you are providing to the circuit. I have one question, it is possible to do the same test at 12 volt
input level? Then you can use the input voltage to also deliver power to the switched side. This will
give us an idea on how much the circuit is using at total compared to the total output. I ask because
the two diodes at the IR2103 is connected to the switch output side and may inject power to your
output, thus adding to the result. It may not be so but I think it is important to check that also.

You are doing a great research with this circuit and you should keep posting your results even if there
are few replays to you posts. Keep up the good work. Now that there is a replica (Tinsel Cola) I bet
he can confirm many of your findings.

Regards,
Groundloop.

[gotoluc]

Huh? I replied to your video, above...but you didn't answer my questions. ??

I just checked my unit with the following parameters:
Logic power from a 11.4 volt battery--draws 26 milliamps when quiescent, a little more when working.
Bridge power from an HP benchtop supply, 50 volts DC, current limited at 100 mA.
No load on bridge. (I disconnected my LEDs for this test.)
Clock from a function generator, square wave, 700 kHz.

Current draw from bridge supply: 30-40 mA, depending on frequency. The draw is very small at low freqs, peaks at around 300 kHz, goes down, then peaks again at 700+ kHz.

So I am confirming your result, but I can't explain it, unless we are experiencing "shoot-thru" or some other weird leakage phenomenon. But I thot the driver chips were supposed to prevent that. Oh well.

Hi TinselKoala,

sorry!... you are right ... okay then, one reply to the last video. I was talking more of the other members of this Forum that have not posted. What's up guys

Thank you TinselKoala for taking the time to test this for me. That is what it does for me also, less draw as the frequency lowers and more as the frequency raises. I have not noticed the peak at 300KHz and back down again. I'll check that out.

I'll look at your question I didn't answer yet and see if you still need the answer. Sorry about that, I must of been cough up in experiments

Thanks for sharing

Luc

[Cap-Z-ro]

Hey Luc,

Please do not stop  posting your results...I, and I dare say many are following your work avidly...check out the number of views this thread has.

The whole world now knows you though your work...I did not want to clutter your thread, so I just observed from the sidelines.

Your work is important...keep the faith.

Regards...

[gotoluc]

Couple things to consider

1) I don’t know if you still have a capacitor in series with those coils, but it’s not necessary, they have distributed parasitic capacitance already.

2) Are both coils at their own resonant point? seperate? is there one shared? Output will go up significantly if both coils are identical


And last but not least, a suggestion on what to try next.....put two pickup coils on the same large coil, then measure.
Also, make bridge rectifier out of switching diodes, try to run small motor.


well done.

Hi armagdn03,

Thanks for your past posts, help and support.

I do have a 250pf in series for the 2 coils to which are also in series. I tried it with 125pf but it gave better results with the 250pf.

I took allot of time to tune both coils to be the same. The way I did it is, my first coil was .600mH so I winded the next to .650, so it is more then the first and connected it to the exact frequency and capacitor of the first and slowly removed wire till it behaved like the first one. I don't know if this is a good way to do it but that is what came to mind.

I tried both coils in parallel at first but had no good results until I tried them in series. So I'm thinking that maybe a longer coil would give a better output. I'm also wondering about geometry of coils if that would also have a better result   so many things to test

I'll also try it with multiple pickup coils as you suggest and next video I can make a better show with lights and motors   I just had to start with the resistors to satisfy the measurement minded ones.

Thanks for sharing

Luc