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Author Topic: RESONANCE EFFECTS FOR EVERYONE TO SHARE  (Read 298251 times)

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #240 on: December 26, 2008, 05:19:30 PM »
Because pin 7 is the high side of the driver,

If you look at the block diagram of these drivers you will see HO pin 7 is using the bootstrap cap + diode for it to work.

Any spike getting to VS will blow the high side of the driver chip.

I dont even know if people are reading my post, I said this many times but it seems to be getting ignored. Reference design from the manufacturer doesnt mean its stable for every design, you will need to protect the components your self.

Anyway Ill keep quite for now and let you get on with it.

Hi Chris31,

I can tell you that your circuit suggestion did not go unnoticed and I even remember Groundloop asking you for additional information. The problem is also my lac of electronic knowledge as you can see since I didn't even know why pin 7 was blowing. So I have to follow Groundloop's circuit since I don't completely understand the workings of them to start implementing other peoples suggestions.

It's too late now since I have no more good IR2103 and I'm not going to order more from China since Groundloop has a new circuit now.

There is one way you could help me at this point to help me testing again is to make an H-Bridge circuit using any of these components that I have: 4013 flip flop 2ea., 4N35 OPTO Coupler 5ea., IRF640 NPN 8ea., IRF9640 PNP 10ea.

This could be one using the 4N35: http://airbug.one.free.fr/HBoard/Hbridge.html

Thanks for you help

Luc

najman100

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #241 on: December 26, 2008, 05:56:47 PM »
@Groundloop
@gotoluc
@wattsup
@TinselKoala

Ok guys finished drilling the PCB and packed them in the envelopes and will send them today .
Ps I left the green protective layer on the pcb once you have all the components please use a  #0000 steel wool to clean the pcb before soldering .

Najman100

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #242 on: December 26, 2008, 06:29:44 PM »
Excellent news Najman100,

thank you for your generosity and devotion to help us all ;D

Luc

Groundloop

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #243 on: December 26, 2008, 10:12:08 PM »
Luc,

I will solder the pcb from Najman100 as soon as I get it and mail it to you with A-priority air mail.
(You will also find 20 pcs of the IR2103s and 8 pcs. of the IRF840 FET-trans N-ch 500V 8A TO220 in the mail.)

That way you will have a circuit to test coils on until I get the micro controller version ready
later in January next year.

Groundloop.

Groundloop

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #244 on: December 26, 2008, 10:49:06 PM »
@Chris31,

I have updated the drawing for Luc with you excellent solutions to the 2103 drivers problem.
I DO listen to you. You are NOT ignored. Any help we can get is needed. Thanks.

Groundloop.

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #245 on: December 26, 2008, 11:06:48 PM »
Luc,

I will solder the pcb from Najman100 as soon as I get it and mail it to you with A-priority air mail.
(You will also find 20 pcs of the IR2103s and 8 pcs. of the IRF840 FET-trans N-ch 500V 8A TO220 in the mail.)

That way you will have a circuit to test coils on until I get the micro controller version ready
later in January next year.

Groundloop.

WOW!... WOW!... WOW!... WOW!... do you ever stop giving Groundloop ;D or is it Santa Claws we have been talking to all this time???

Thank you, Thank you, Thank you ;D

Maybe there is no need to send me so many IR2103's with the new mod that was suggested by Chris31 ;)... maybe 4 or 6 would do and I have 2 of the IRF840 so maybe 4 of those would be fine also.

Thank you once again my Overseas Friend ;)

May this new 2009 year be full of Joy for you and your Loved ones

Luc

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #246 on: December 27, 2008, 12:03:00 AM »
@everyone,

I took the time to go back and update the past posts of Groundloop's H-Bridge switch circuit to the above Version 6 so newcomers don't loose time when reading from the beginning.

Thanks Chris31 for your suggestion of the problem and for Groundloop to implement changes and supply us with version 6 in order to hopefully help the problem but not Kill the effect.

Luc

TinselKoala

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #247 on: December 27, 2008, 01:04:24 AM »
I have an ideal I would like to share, not sure how it will work... but here it is:

how about if we use a air core transformer like the ones you are using now, but with 3 windings.

1st winding is your primary driven by the same method.

2nd winding having many more turns making a HV LC circuit. on this coil we only connect a capacitor to make an HV Resonance circuit.

3nd winding is your output coil.

Any comments are welcome.



Which is pretty much what I'm doing. Works amazingly well. Can light up all kinds of LEDs, little fluorescent tubes, etc.
Gave me a pretty good RF burn today, too. Punched a hole right through a fingernail. Ouch. Eh, what's that smell...something burning--Oh, it's ME!!

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #248 on: December 27, 2008, 01:41:24 AM »
Which is pretty much what I'm doing. Works amazingly well. Can light up all kinds of LEDs, little fluorescent tubes, etc.
Gave me a pretty good RF burn today, too. Punched a hole right through a fingernail. Ouch. Eh, what's that smell...something burning--Oh, it's ME!!

LOL  ;D TinselKoala, the same thing happen to me on my index finger, man the smell... but the most amazing thing was about 8 hours later I could not find where the burnt hole was ???

Let me know how yours heals and what was the pulse frequency you were using.

Luc

ramset

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #249 on: December 27, 2008, 01:57:53 AM »
What is this the smoking finger gang?
I hope this isn't some kind of initiation!!
GEESH the flaming digits
 Chet

najman100

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #250 on: December 27, 2008, 05:54:13 AM »
What is this the smoking finger gang?
I hope this isn't some kind of initiation!!
GEESH the flaming digits
 Chet



yes  you might be asked for that  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D

gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #251 on: December 27, 2008, 08:25:54 AM »
Hi everyone,

I remembered that I still can continue testing using the 10 volts RMS output of my Signal Generator. It's nothing like having 50 volts but good enough to see the effects of resonance and test new coil designs.

I'm trying to better understand what is going on in the Secondary pickup coil. It looks like it works more like an antenna since I was able to have it 3/4" or 20mm away (see picture) and it still can charge the capacitor to 1.12vdc with a 5 ohm load attached to it and I was using only 7.19 volts RMS from the SG output. Also prior to doing this test I tuned the primary coil without a secondary on it to resonate at a frequency where it would use the less amp draw by using the small micro 12v (12 ohm) car dash bulb in series and tuned it to the point that the bulbs filament would not even glow. I was down to a 120pf capacitor in series and at 625Khz square wave. I attached my Scope probes, green to the SG at the primary input and the yellow to the loaded capacitor from the secondary (see Scope shot) My USB Scope also has an FFT so  attached the FFT of the secondary probe.

Interesting to see the secondary is resonating at its own frequency? Looks like for every punch from the primary the secondary keeps resonating. Maybe this is where the extra energy is coming from???

Anyone care to comment.

Luc

najman100

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #252 on: December 27, 2008, 02:16:38 PM »
Hello Luc
i suggest that you do not use your signal generator like that you might burn it ,looking at the scope shot i see the square is distorted maybe because of the BEMF  comming back to the signal generator so the same thing gonna happen to the  SG  as it hapened to the 2103.

Najman100

CRANKYpants

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #253 on: December 27, 2008, 03:11:41 PM »
Hi everyone,

Interesting to see the secondary is resonating at its own frequency? Looks like for every punch from the primary the secondary keeps resonating. Maybe this is where the extra energy is coming from???

Anyone care to comment.

Luc

Sai Ram Luc,

My secret Christmas wish to the Universe was that I could be able to fully finance your important work...

Because for anyone to comment correctly you really need to give everyone a full "3D" picture of what is going on or we end up like the "4 blind men trying to describing the elephant"

If you are using AC - you really ought to be monitoring the current, voltage and most importantly POWER FACTOR at ALL times.
(perhaps you should come and borrow a scope that can do that for you?)

This will tell you and all of us what is really going on in all the coils at all times.

Cheers
Thane




gotoluc

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Re: RESONANCE EFFECTS FOR EVERYONE TO SHARE
« Reply #254 on: December 27, 2008, 04:59:27 PM »
Hello Luc
i suggest that you do not use your signal generator like that you might burn it ,looking at the scope shot i see the square is distorted maybe because of the BEMF  comming back to the signal generator so the same thing gonna happen to the  SG  as it hapened to the 2103.

Najman100

Thanks Najman for your concern and comment ;)... you do have a good point and I could blow my eBay $22. SG but I'm prepared to make that sacrifice just to continue studying the effect... I'm hooked ;D... I need to resonate things man ;)

If anyone has any suggestion on a way I can protect my SG please share.

I'll try and see if a ferrite Isolation transformer works

Thanks for sharing

Luc
« Last Edit: December 27, 2008, 05:44:37 PM by gotoluc »