[Solved] Excitation of a car alternator

eole · by **eole** » 26/05/10, 23:20

Hello to

Abaddon

I come back to your first question, all the alternators are

not all excited in the same way we would have to know the

brand, type, max amperes

unfortunately you need a regulator after a few seconds

charge without regulator the voltage goes up to 17 .18 volts

chatelot16 · by **chatelot16** » 27/05/10, 00:00

with the car engine, without regulator, the battery overload will be serious!

with a wind turbine it's another thing: the wind produces limited power, and we have a large battery to charge: no need for voltage regulation: it suffices to stop the wind turbine completely when the battery is full

when the battery is not full, it must be charged: with the excitation which gives the best efficiency

zorglub · by **zorglub** » 27/05/10, 08:06

....... and get up at night to stop the wind turbine when the battery is full !!

not very smart, if you were employed, you would plead to be obliged to get up ........

abaddon · by **abaddon** » 27/05/10, 22:28

eole wrote:not all excited in the same way we would have to know the

brand, type, max amperes

I have several copies (10) of Valeo alternators on which it is marked: Valeo YV1925 12V 48.89A. They are new. I don't know what vehicle they were intended for.

They have 1 screw to connect the mass, 1 other for the output (the 14V) to be connected to the battery and the elements to be supplied and a terminal to connect the power supply of the current regulator for the excitation.

But, this is where it gets tough for me ... with the number I have, that makes spare parts for a while. My wind turbine is not supposed to break either ... However, to be on the safe side, I am planning spare parts. But on the spot (I recall it in the middle of the bush in Africa) if they no longer have access to this alternator, my goal is that they can take any other car alternator and replace it directly without having to do something other than simply changing the faulty alternator with the new one.

Otherwise, for chatelot 16 what I would like to control is the magnetic flux of my alternator. For that I can impose a certain current which will fix the magnetic potential (theta = N · Iex) and we obtain the flux with ohm's law for magnetic circuits: flux = magnetic potential · permeance.

To make a current regulator, the basic one should go ... The idea is that if there is not enough amps / turns it stops ... Otherwise I know how to design a buck-boost regulator to adapt according to the input which varies .. The electronics are not at all a problem for me ... But I would like to avoid .. Otherwise I will have to make 50 copies of my regulator to replace it systematically. .. It is possible, but it will increase the price of my wind turbine and I would like to avoid that.

Thank you for your answers.

Yours.

eole · by **eole** » 30/05/10, 17:21

Hello everyone

Abaddon

Alternator excitation Valeo 50a

You need to connect between the positive terminal of the alternator and the terminal
(L) from the regulator a 12 volt excitation lamp of 2 or 3 watts

Alternator off the lamp and on

Alternator charging the lamp and off

Go see here

http://pagesperso-orange.fr/deltajp/mon ... plein.html

A+

abaddon · by **abaddon** » 31/05/10, 10:25

thank you eole for the information and the link ..

I'm watching all of this.

abaddon · by **abaddon** » 31/05/10, 14:45

thank you eole. I obtain the desired behavior .. I managed to draw 43 A from my alternator by connecting all the loads that I had ... But I don't worry about reaching 50 A.

I replaced the bulb with a 50 Ohm 5W resistor and 300 mA go through it when the alternator is not producing (U = 12V), and the current goes to zero when the alternator is producing, there is 14.5V of both sides of the resistor (U = 0V).

thank you for everything. : Cheesy:

dedeleco · by **dedeleco** » 31/05/10, 17:27

the orange personal link does not work but there is this one:
http://sd-1.archive-host.com/membres/up ... rvaleo.pdf

another useful on inverters:
http://tel.archives-ouvertes.fr/docs/00 ... imante.pdf

abaddon · by **abaddon** » 31/05/10, 20:09

dedeleco wrote:the orange personal link does not work

He made a mistake in the address: http://pagesperso-orange.fr/deltajp/montages/trop_plein.html

Clad · by **Clad** » 05/01/12, 18:42

Hello,

Yes i dig up : Mrgreen:

but I love this : Lol:

I did not find an answer to my question via the search function so I am coming to you.

Can we create the excitement of an unmodified auto alternator by means of a small DC 12V motor attached to the same pulley as the alternator?

Thus it would be excited only when the wind turbine reaches a sufficient speed to produce the 12V of the DC motor ...

I am in the west where the reasoning holds the road?

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[Solved] Excitation of a car alternator

valeo alternator excitation

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