Reload 2V 12 1 batteries in series with one charger?

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Leo Maximus
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by Leo Maximus » 07/03/09, 19:01

Alain G wrote:Leo Maximus

The classic double alternation circuit, studied in the previous chapter, is very interesting because it operates as a doubler of intensity and the DC output voltage is easy to filter, the frequency of the AC component being 100 Hertz.


You will double the amperage (intensity) and not the voltage (voltage) with this circuit.

Christhophe has a charger with regulation so nothing to do to increase the voltage. :|

Absolutely not, the doubler voltage doubles the voltage as the name suggests. Do not confuse voltage doubler and double alternation.
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Alain G
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by Alain G » 07/03/09, 20:34

Leo Maximus

Without wishing to offend you.

Read the sentence correctly:

it works as a doubler of intensity.

the DC output voltage is easy to filter, the frequency of the AC component being 100 Hertz.

The "and" does not mean that you increase both, by increasing the amperage according to the applied load you will necessarily increase the voltage a little but not double it.
: Evil:
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Leo Maximus
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by Leo Maximus » 07/03/09, 22:26

This scheme of doubler of tension is what is more classic, it exists since there are rectifiers. We learn that in 1ère year of BT.

Here is the scan of a Dunod memory aid from 50 years ago. We can put the two batteries in series instead of the capacitors and we will have 24 volts with a charger provided for 12 volts. If necessary I can do a Spice simulation.

Image

I would add that there is no need to filter, it is useless since at the level of the batteries we already have continuous. Then a half-wave rectification will give "pseudo" 25 Hz.

Good night,

Léo
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gegyx
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by gegyx » 07/03/09, 23:09

: Arrowu: Hey, are not you going to get excited? :|

Just be attentive:

Alain G read, like everyone else:
Leo Maximus wrote: The classic double alternation, studied in the previous chapter is very interesting, because it works as a doubler of intensity and the DC output voltage is easy to filter, the frequency of the AC component being 100 Hertz.


From there, he deduced that you were wrong, while your link and your subsequent explanations referred to a doubler of tension.

When, he made you notice, of the previous slip, you are not going to check your slip, and reading the rest of his message, you thought he wanted to bite the mistake.

*******
Simply !
Phew, we escaped a war with missiles over the Atlantic ...
: Lol:
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Alain G
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by Alain G » 08/03/09, 00:17

gegyx

There will be no war, believe me.
: Cheesy:

Maximus

Now you have a doubler of tension and not of intensity.
Your link gives all possible forms of straightening and I jumped on the first.

The small problem is the pseudo 25 hertz, it is rather 50 hertz (1 impulse cycles) and 100 hertz with bridge rectifier (2 impulses per cycle).
For your voltage doubler it is 100 hertz since it generates the pulse on the positive and the negative, as seen on your image "" waveform: 1 cycle "".
:|
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Leo Maximus
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by Leo Maximus » 08/03/09, 11:08

Hello,

"Maximus Leo wrote:
The classic full-wave circuit, studied in the previous chapter, is very interesting because it operates as a doubler of intensity and the output direct voltage is easy to filter, the frequency of the alternating component being 100 Hertz. "


I did not write that, these words are solely the responsibility of the author : Lol: . I wanted to be content to copy / paste an archi-classical figure of Latour's voltage doubler (which I should have done : Lol: ) but I found it more honest to put a link - not very good apologies. Here is another link, a priori more serious, on voltage multipliers:
http://www.sonelec-musique.com/electron ... nsion.html

The available current is divided as the voltage is multiplied.

By simply adding a diode at the output of the transformer we can charge a second battery in - 12 volts. With both batteries in series there will be + and - 12 volts relative to the ground or 24 volts at both ends of the 2 series batteries.

A scan of Latour's dubber in an article in the magazine "Le Haut-Speaker", here it is 220 V, but the principle is the same:

Image

C1 and C2 are to be replaced by the batteries and it is necessary to add the diode D2.

8)

ML
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by Christophe » 26/05/09, 12:31

Question to electronics specialists.

I think it is possible to do a simple editing (I remember the goal: to load 2 12V battery in series with a single source of 12V) with a timed relay of this type: https://www.econologie.com/shop/relais-t ... p-252.html

This relay would reverse the voltage around the midpoint between 2 batteries every X minutes? X = 5 minutes for example?

On the other hand, 2 relay (or a relay to 2 independent circuits, a relay to an output is an 5 / 2 so it would be a 8 / 2?): One for the + and one for the -.

But this method may not be good for the internal chemistry of the battery?

In any case, it is "a priori" not compatible with intelligent chargers which optimize the charge voltage curve (unless you put X = duration of the total charge) ...
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by Christophe » 26/05/09, 12:49

Here is a relay that could be suitable:

Image

If I remember correctly it is a 8 / 2 type relay (8 terminals, 2 control terminals and 6 I / O)

Wiring:

Between 2, 3 and 4: the +
Between 5, 6 and 7: -

By using 2 separate relay (even of the same type), I am afraid that the slightly different time of communtation does not create a big risk of short circuit!
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SixK
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by SixK » 26/05/09, 13:07

It would not be easier to charge the batteries in parallel! ;)

I'm not here anymore! :)

SixK
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Leo Maximus
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by Leo Maximus » 26/05/09, 13:51

We are back to the starting point! : Lol:

Is the "12 volts" source a direct or alternating (rms) voltage?
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