Muller Dynamo

[chalamadad]

Hey everyone,

in my current setup - when trying to recharging the running battery (12.3 Volts) via backloop through caps with the output constantly connected to the battery (cap voltage is 13.1 Volts) the battery voltage will drop. So this is not working.

In principle, is pulsed mode charging superior to a constant connection and will pulsed mode charging allow the battery to recharge? If pulsed charging at a higher voltage is better I just might want to try that.

Also, what is the best desirable output voltage we want to charge a (for instance 12V) battery with? ( I read somewhere that we don't want to charge above 5 times the battery voltage for security reasons).

Thanks,
Chal

[konehead]

Hi Chalamada

I think if you have only 13.2 voltage in cap on a meter as cap charges baattery, this will do some charge, but there is problem of the cap dropping down below the voltage of the battery itself during the discharge event,
if there is long-enough pulse width to the discharge,
and there probably is too, since caps discharge very fast, and it needs to drop only about a volt.... and now the cap is BELOW the battery voltage (at least the "wants" to be below battery voltage - but battery might "Stop" the voltage drop dead in its tracks - but you dont want this to happen is my point here...)

The cap can actually DISCHARGE the battery for awhile, right after the CHARGE pulse happens if you dont keep that cap up in voltage above the battery voltage all the time.
When the guy who worked with Bedini told me that 23V is the "target voltage" in cap charging battery,  I think he meant this is the voltage you want to SEE on meter WHILE the 12V battery charges...dependng on pulse width and cap uf value of the cap, you might have actually say as example, 45V or 35V (whatever it is)  in cap before cap discharge (have to look on scope) and the cap drops down to only 23V and not below that...
Its OK as long as it is lead-acid type battery to be charging battery with lots of voltage - the lead acids will "Absorb" it....but not with nicads or lithiums -  that is whole differnt battery chaging method and they will blow up easy too if you dont do it right.
Measuring the amount of current going into the battery has a whole lot to do withthe voltage in cap - if you have 50V in cap, compared to 13.2V in cap, there is a HUGE amount of current flow happening at 50V compared to 13.2 into 12V battery (try it by waitnig a couple seconds for cap to fill way up).......
cap discharge isnt like a car-alternator charging where it "needs" to be no more than 14.2V or so maximum volts, or regular home battery chargers working off grid sinewave with transformere and couple of diodes...also these "need" to be no more than 14.2V or so maximum...but chargeing with pulsed capactiors is different thing...

Someone told me that you will get better results with a choke inductor in between the cap the battery too...it slows down the cap discharge abit, and also will make it so some backemf is "included" in the charge he said....I have never tried this however dont even know where to start with choke/inductor size and turns etc....

[chalamadad]

Hey Kone,

thanks. In fact the cap voltage does not drop below battery voltage. It stays at 13V even if its connected all the time. If it's not connected it goes up to 34V in a few seconds. So the question is, since the 13V charging does not work, would pulsed discharge to battery, maybe at 24V, work even if it happens just every second or so?

Chal

[energy1234hope]

Hey guys take a look at muller replication video from member at energetic forum

http://www.youtube.com/watch?v=Qn2Z_Tp0cw0         

[kida]

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