Connecting a car alternator ...

[Alain G]

Here is the diagram of the connection with three diode bridges for the automotive alternator.

[loop]

Hello

Here is a feedback that will interest you
Direct training but excitement is retained

http://pagesperso-orange.fr/ebonys/page ... ateurs.htm

Good reading

A+

[titiyador]

You are great !! All this information that comes out makes me want to go home right away to try it all !! I will keep you posted as soon as there is something new!

This site is great and people are very supportive!

Thanks again!

Tim

[boubka]

straightening 3 diode bridges in tri ... not good. (the result should not be terrible)
this is good:

[Alain G]

Bubka

And why it's not good, that's what I use and it works very well, moreover the diode bridges are 25 amps and my assembly makes that the diodes are in duplicate for 50 amps per phase.

You will pay more for your diodes which can only be cooled by three diode bridges of 4 or 5 euros each.

[Alain G]

Looping

Very good links, but this guy keeps the original regulator and this is what causes blockage, as I said the regulator needs a certain voltage to activate and can not work gradually.

It is better to use an external regulator and drift on a resistance.

[Christophe]

Yes good link and here, I think, what to remember:

Third topic on alternators, the energy efficiency of these critters, and yes, we must talk about it because this will quickly have consequences on the success of your electrical projects, especially in terms of output power, see my page "wind turbine experiences",

I therefore indicate a yield of 40 to 60% according to the estimates of several people, personally I would rather approach 40% in view of a test that I did, it was a question of checking the eclectic consumption of the rotor at the time of priming then in operation, and there I must say that I was surprised by the result, I took the time to take photos,

Race results for the alternator rewind of my 220 watts, at 0 rpm consumption of the rotor 0,08 A (normal it is a forced ignition) sent in the battery 0 A (recess), at 250 rpm and once the ignition and done the stator consumes 2,65 A! and the alternator does not send anything into the batteries! and finally at 750 rpm the rotor consumes 3,89 A (under 12V I presume?) to give 6,3 A to the batteries! Culture hard !?

What lesson learned from this experience for our wind turbine? well it must be said that our propeller should develop at least 2,65 A (32 watts) of mechanical power just to be able to prime the alternator! see that you have to think about performance, it's fast, it's cheap, it's easy, but it's not efficient, you can't have everything!

Well, I'm not going to throw away my alternator !? well no, it works anyway and I'm having fun, all that matters is that it makes juice, as long as my blades can support the generator ...

Anyway, it's not tomorrow that I will try to rewind a car alternator, I prefer the looping method ... or did I understand nothing?

[Alain G]

Christopher

As soon as the excitation is done you can unplug it and it continues.

The priming can be done by a deflector and a switch that activates with the wind, you can put a resistance and reduce consumption, I repeat without regulator the alternator starts gradually and self-regulates.

[loop]

Anyway, it's not tomorrow that I will try to rewind a car alternator, I prefer the looping method ... or did I understand nothing?

I made a permanent magnet rotor, but I also rewound the alternator because I wanted to produce at low speed!
The 2 modifications can be made separately but in wind power use, the 2 complement each other.

A+

[titiyador]

Hello, As agreed, I keep you informed of the progress of my project, unfortunately, I abandoned the alternator as a generator, I instead opted for a "ready-made" generator, of low power (50 volts in 4 amps or 12 volts (regulated for the batteries) * 4 amps: 48 watts max.

I would now like to know if it was possible to recover magnets from a car alternator to make a generator from start to finish. Do you think it is easy to recover magnets? Are these magnets neodymium magnets?

For those who wish, it is possible to view on "You Tube" (I'm not trying to advertise :-) !!!) three videos with the following keywords: "Eolienne Quesnoy sur deule, Lille"

Goods.

Tim.