Does anyone have the schematic for the 3 diodes in a Delco Alternator?

The alternator is 3-phase.

...and check polarity with a meter...they come in both styles (metal case can be anode or cathode).

And there are six diodes.

The 3-phase makes sense, but how are there 6 diodes? Do they have two of these heatsink blocks in the alternator or what?

Why don't you google "three phase alternator wiring"?

Den torsdag den 4. januar 2018 kl. 18.52.44 UTC+1 skrev snipped-for-privacy@tubes.com:

Automotive alternators are three phase.

Thats what I was looking for..... Thanks!

These won't work in your application. You say two diodes in the charger, an d that probably means full wave rectification of a center-tapped transforme r. The diodes for alternator have either all the anodes connected together (negative ground) or all the cathodes connected together (positive ground). You would be better off buying individual stud mount rectifiers. Something like this

Give that another think. In a center tapped transformer application the two diodes will have either their anodes or cathodes connected together. He could use the block shown by connecting two of the studs to the non-center tapped transformer connections, treat the center tap as ground and using either the positive or the negative terminal of the diode block depending on what polarity he chooses, or both!

ote:

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, and that probably means full wave rectification of a center-tapped transf ormer. The diodes for alternator have either all the anodes connected toget her (negative ground) or all the cathodes connected together (positive grou nd). You would be better off buying individual stud mount rectifiers. Somet hing like this

two

on

One diode in the block goes unused and the diodes that are used have a much smaller forward average current rating than the ones I noted. Your money g ets you less diode with the misused generator block IOW, significantly less , and all you do is take up a lot of space unnecessarily.

snipped-for-privacy@tubes.com prodded the keyboard with:

A vehicle alternator is a three phase generator! One diode for each phase.

TWO diodes for each phase. It's full-wave. ...Jim Thompson

Is there a reason for the 3 phase? Cna they get more amperage that way, or what? Just curious.....

Duh ;-) ...Jim Thompson

and less ripple,

Yes, it's the most efficient use of copper. The same reason power distribution is almost always 3-phase.

Jim Thompson prodded the keyboard with:

Thanks. Yes, I should have said "diode pair for each phase"