RE-EMF Charger

[rfnreynders]

Some of you asked me to post this post here, under renewable energy, as i posted it somewhere else on this forum before...

I copied the text that i used on some other forums.
Hope you enjoy !

Rene. R.

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For those that know about Bedini's chargers, that play with battery's.
And those that know a little about the Joule Thief.

I've got a little something for you....

How about a very effective , easy to build battery charger that uses the applied energy not only super efficient, but in a sence twice !

A charger that can charge, non rechargable battery's , rechargable battery's , lead acid battery's or Bedini's cristal cells. Without heating up the battery.

Restoring almost dead lead acid battery's if left charging over night(s), desulfating them.

Cost of the circuit... around 2 dollars... Now thats fun !

Enjoy !

Joule thief - RE-EMF Charger - by Rene - YouTube

Rene R.

[hello_all]

Thanks I will try that any variables like I want to charge my 7amp lead acids so how big the coil should I make ..to have it charged faster

[ewizard]

Good to see you posted it here and thanks for including the schematic as the one I tried saving off the video wasn't very clear. I haven't looked back at the other thread but it may be helpful here to to answer what type of coil core you used as in how many turns, type of core, toroid or straight etc. Other than that it looks very straight forward and a fairly easy build. I've certainly got a lot of batteries in need.

edit: I see another member built your circuit and was very impressed by it. I picked up some answers to my questions from his build and since I've got a 2n3055 I certainly don't have any reason not to try this soon. Sounds like a really great setup. I hope he jumps over here or maybe a moderator can combine the two threads.

[ewizard]

From the other thread - hopefully we'll continue here where a lot more will be excited to see the bottom 3 lines!!! All ears here

Done !

check it out.
Glad you like my ideas...
next.

- A transformer setup that amplifies (if one likes... to infinity)
- How about a generator that transforms centrifugal power into usefull energy. If talking about a COP.... How about COP 100+... :-)

Someone at overunity.com was working a an transformer setup that is supposed to amplify but I think he was having trouble getting any replications. Thane Heins also has something along this line but there are some questions on it so I'm very interested in any transformer that can amplify. And of course very interested in anything that approaches COP > 2 so COP 100+ YEAH!!!

BTW to EF

[gr8dane]

Yes I used a 2n3055 transistor... I want to try a few different ones. Ive used 2 different toroids, first was about 3/4 of a in in dia bi filer wound. The second was 2.5 in and quad filer. Both were impressive the larger toroid was toucher. I was hard to find a sweet spot between charge rate and the heat in the tranny.

Then I got the idea to use a Bedini monopole style coil. Bi filer with 23 and 26 awg wire approx 850 turns (I lost count when I wound it). This required no resistance. The diodes get warm put 2 in seres were the coil back feeds to charging battery. The coil gets barely warm the transistor stays cool.

I want to try a ferrite core a air core and bigger wire. Also a few different toroid windings. The charge rate on a good battery is staggering and on first charge yielded a higher voltage than Ive ever seen on that battery with bedini ssg or conventional. Currently trying to desulfate a bad battery.

Will post some test data when I have enough to post. Definitely worth playing with if you need a efficient way to charge a battery. Never seen it draw more than .54ma Seems the more charged the battery the higher the draw. Im running a steady 19.5 volts through circuit.

Will post data when Ive run it a few times and as I get material to try a few things.

[ewizard]

Yes I used a 2n3055 transistor... I want to try a few different ones. Ive used 2 different toroids, first was about 3/4 of a in in dia bi filer wound. The second was 2.5 in and quad filer. Both were impressive the larger toroid was toucher. I was hard to find a sweet spot between charge rate and the heat in the tranny.

Then I got the idea to use a Bedini monopole style coil. Bi filer with 23 and 26 awg wire approx 850 turns (I lost count when I wound it). This required no resistance. The diodes get warm put 2 in seres were the coil back feeds to charging battery. The coil gets barely warm the transistor stays cool.

I want to try a ferrite core a air core and bigger wire. Also a few different toroid windings. The charge rate on a good battery is staggering and on first charge yielded a higher voltage than Ive ever seen on that battery with bedini ssg or conventional. Currently trying to desulfate a bad battery.

Will post some test data when I have enough to post. Definitely worth playing with if you need a efficient way to charge a battery. Never seen it draw more than .54ma Seems the more charged the battery the higher the draw. Im running a steady 19.5 volts through circuit.

Will post data when Ive run it a few times and as I get material to try a few things.

Sounds very good. BTW did you mean you never saw it draw more than 0.54 ma or 54 ma? If it's less than 1 millamp draw that would be really amazing but I'm guessing you intended 54 millamps?

[ewizard]

I built the circuit and on my first very dead battery it was running fine although I'm not sure it will save this battery that I've tried for years to recover. Started at 1.8 volts (a 12 volt SLA) and I was seeing around 5 to 6 volts after just a few minutes of charging and a minute of being off the charger. Everything stayed very cool with that battery. But then I put a riding mower battery on it that had been sitting around 9.5 volts and was run down in electrolyte to below the plates. I refilled with just some distilled water to try this. I hooked it up and was almost ready to walk away for lunch when I smelled that hot electronics smell. I touched the top of the 2N3055 and almost burned my finger it was so hot. I'm not sure where the 1K pot was set at and when trying the first battery I put a scope across the output and adjusted full range on that pot without seeing any difference in output pattern or voltage although that first battery probably had very high internal resistance. I'll try later setting the pot to maximum later. I've checked the pot and resistors to make sure they were correct values. All the diodes seemed cool enough. The one I have across the source input of 20 volts is a very high amp diode. In the couple minutes I had it on the mower battery I saw it come up to over 12 volts but I didn't wait but a few seconds to see if it held. I'll post later if it seems to be recovering and holding.
A couple other notes - on the first battery I was seeing 28 volts across that when charging. The second battery started around 20 volts and rapidly dropped down to around 12.7 volts. I'll take that as a good sign that I may recover this one. Also the power supply I'm using is an isolation transformer with about 22 volts AC 2 amps with a bridge rectifier and a 680 uf 250 volt electrolytic. I did put an o-scope across the output on the first battery but wasn't seeing anything over 5 volts peak to peak.

[hello_all]

quick and dirty way of easier way of charging a battery is to connect 24 volt dc adapter serial to a 12 v dc motor to a charge battery , i have recovered lot of batteries like that , the ones which are dead although will show more volts like 18v or 20v but the rechargable ones will show 13v..

use adapter below 1amp or u might not trickle charge it ..

[hello_all]

only one problem with that one is annoying sound of motor

[ewizard]

Turned the base resistance on the pot all the way to 1K but the transistor was still getting too hot within a minute. Added another 1.6K Ohms but no difference. Added an inductor but no difference. Put a resistance between the collector and coil but still got hot so finally I put about 35 Ohms after some trial and error between the emitter and power supply and that was the only way it wanted to stay reasonable. Also put a heavy heat sink on it which seems to work. I'm just shooting in the dark here so if anyone can suggest a better way I'm listening. My bifilar toroid coil does only have maybe a total of 20 or so turns on it with some 18 guage. Using about a 30mm diameter toroid. Also I'm just seeing a clearcut sawtooth pattern in the DC output that only has about 30 mv peak to peak on the battery that seems to be taking a charge (mower battery).

[ewizard]

quick and dirty way of easier way of charging a battery is to connect 24 volt dc adapter serial to a 12 v dc motor to a charge battery , i have recovered lot of batteries like that , the ones which are dead although will show more volts like 18v or 20v but the rechargable ones will show 13v..

use adapter below 1amp or u might not trickle charge it ..

So just put a 12 volt motor in series with the battery and a 24 volt DC power supply? I can see how the spikes off the brushes would help charge some difficult batteries.

[hello_all]

So just put a 12 volt motor in series with the battery and a 24 volt DC power supply? I can see how the spikes off the brushes would help charge some difficult batteries.

I use a drill motor has to be brushed motor , I got the idea from 3 battery system discussion , where they were putting a dead battery in the third place and in the ending the dead battery gets charged which was not the idea ...but hey if I charge a dead battery why not use it as a crude charger

[hello_all]

With 2n3055 the low frequency and high amps draw causes overheat , so only way is to increase the number of winds and that changes frequency , best is to wind more and have taps on primary ... For different resistive loads..or use less amps but how?.. I am also stuggling on joule ringer...

[ewizard]

I use a drill motor has to be brushed motor , I got the idea from 3 battery system discussion , where they were putting a dead battery in the third place and in the ending the dead battery gets charged which was not the idea ...but hey if I charge a dead battery why not use it as a crude charger

Yes that's how I was taking it - somewhat the same idea. I've played with the 3 battery setup also. I did just try this briefly with a 4 brush 12 volt motor and it does go up in charge fairly fast. I didn't leave it running for more than a minute though as I think that motor might be rough on the power supply I'm using at the moment. I think it's a good idea though to try on some difficult batteries.

[totoalas]

JT 2dMAX CHARGER 291012 - YouTube

The battery and diode cab be included here

thanks


totoalas


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