RESONANCE EFFECTS FOR EVERYONE TO SHARE

[gotoluc]

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.

Hi Groundloop,

thank you for bringing up this point. I do agree with you and we must look at all possibilities of error, that is why I ask for input.

As you know, I have mentioned to you in emails that the IR2103 get hotter as the frequency rises and or as I increase the switching input voltage.

I have no ideal how it will perform from just a 12vdc input but I will try and see. At lease what I can do is add a amp meter at the logic side to see if there is a change as I connect and disconnect the coils   I'll also try it with a bulb in series to see if intensity changes.

Thanks for sharing.

Luc

[gotoluc]

Oops

[gotoluc]

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...

Thank you Cap-Z-ro for coming out and expressing your interest and support.

I hope others can join soon as we need to work together if we want this to work and get to the people in need.

Luc

[gotoluc]

Umm. Ok. Aren't you just measuring the current draw of the logic and switching circuits? Isn't the charge current coming from the one cap being maintained at 50 volts, going thru the bridge and the coil? So the energy to charge the 12000 mfd cap isn't coming thru the AC ammeter?
Am I seeing this correctly? Could you post a clear drawing of the whole circuit including the meters and caps and variac and all?

Also I can't figure out why my bridge works, since I didn't rewire the 4013. Did I make a lucky mistake?

Okay TinselKoala,

the current I am measuring in the video is what is keeping the capacitor bank charged and is feeding the switching side of the circuit to which the coil is connected or disconnected as I demonstrate in the video. The 12,000uf bank with attached 10 ohm resistor as load is being charged by the secondary of the coil in question, (no direct connection to the 50vdc cap bank). The reason I monitor the amps from this location is it is 60Hz I know the meter will give an accurate reading at 60Hz and mostly because it is sine wave. However monitoring the the amps from the DC side when it is on off 350,000 times a second is not a good location since I don't think any meter will be accurate in this kind of situation. If anyone knows better please do provide your knowledge.

As you now know, since you tested it,  the circuit consumes close to 30ma from the switching input voltage at frequencies around 350Khz with nothing connected to the outputs. If you know this now! should you not ask yourself ... how was he able to charge a 12,000uf cap bank with a 10 ohm load attached to over 3 volts and not show any extra draw from the 50vdc input cap

Thanks for your interest and sharing.

Luc

[TinselKoala]

Okay TinselKoala,

the current I am measuring in the video is what is keeping the capacitor bank charged and is feeding the switching side of the circuit to which the coil is connected or disconnected as I demonstrate in the video. The 12,000uf bank with attached 10 ohm resistor as load is being charged by the secondary of the coil in question, (no direct connection to the 50vdc cap bank). The reason I monitor the amps from this location is it is 60Hz I know the meter will give an accurate reading at 60Hz and mostly because it is sine wave. However monitoring the the amps from the DC side when it is on off 350,000 times a second is not a good location since I don't think any meter will be accurate in this kind of situation. If anyone knows better please do provide your knowledge.

As you now know, since you tested it,  the circuit consumes close to 30ma from the switching input voltage at frequencies around 350Khz with nothing connected to the outputs. If you know this now! should you not ask yourself ... how was he able to charge a 12,000uf cap bank with a 10 ohm load attached to over 3 volts and not show any extra draw from the 50vdc input cap

Thanks for your interest and sharing.

Luc

OK, good, I'm glad you aren't going quiet.

First, some more results.
First, my unit seems to oscillate at 1/4 the clock frequency, not 1/2. That is, if I give it a 1 kHz square wave input (say) the output bridge gives a 250 Hz square wave output. I didn't notice this last night as I was using both scope channels to look at the outputs. Are you sure yours does 1/2? Could this difference be because I am using both flipflops in the 4013 and you are only using one?
Second, I looked at a larger freq range. The no-load leakage current peaks at a drive freq of about 1.8 MHz or so, then goes down again, but the whole unit shuts down at a little over 2 MHz. I'm sort of bummed at this, I was hoping it would get to 3 MHz.
Third, I am using the IR2104 which has the shutdown or inhibit pin. When the shutdown is selected, the leakage current goes away and I just see the 26 mA for the chips. So the problem, if that's what it is, is in the output of the driver chips or the mosfets themselves. The first thing I'd try is bigger gate resistors. But that's just a guess.
Fourth, I forget, maybe it will come back to me in a minute.

Second, your circuit and the cap charging. I'd like to see an exact diagram of the set-up before I stick my foot too far in my mouth, but a couple things strike me as possibilities.
First, the meter may not be fast enough to respond to the current surge. It's all over pretty quick, I think.
Second, you are only charging the output cap stack to a relatively low voltage. As you know the energy on a cap goes as the square of the voltage. I'm not sure what to use as the input energy, though, which is why I'd like to see a whole diagram of the circuit, including meters, variacs, load resistors, etc. In other words, the whole setup.

Third, sorry about all the firsts, seconds, and so forth. It's been a long day, and it will be a long night.