Hi natchezbrown,


In the Amptramp, the alternators are all wired in parallel.
That is:
1) All earths are linked, through the metalwork of the machine frame,

2) All positive outputs are linked together through moderately heavy
cables to a common point where the welder cable goes,

3) All exciter inputs are connected in parallel also.

Because the alternators are all of the same make, they have very
similar electrical characteristics. This allows them to be connected
in parallel, while sharing current evenly (+-5%).

In my experience, I have not been able to over load an alternator.
Each of mine delivers 60A, and can do this constantly - without
suffering any ill effects.
The alternators become hot, about 60 degrees C, but this is due to an
effect known as 'eddy currents'.
These currents are induced directly into the casing by the rapidly
rotating magnetic field coming from the energised rotor.
The heating effect will be seen, even when the alternators are not
feeding an electrical load.

Anyway, you'll find that the wiring is very simple indeed. The only
fiddly part is taking the alternator apart, to get at the brushes
that feed the excitation rotor.
The direction of rotation is not important, nor is the electrical
polarity that you feed to the rotor wires.

I am delighted with the performance of this machine. It has been
faultless. No alternator failures in over 7500 hours of operation.


Best wishes,
Steve.



--- In Amptramp@yahoogroups.com, "natchezbrown" <mcb191@...> wrote:
>
> does any one here know how to combine the output of two alternators
>