Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Fantastic addition Nick, congrats !!!

When will you release a pic of the whole board, i´m quite curious



The standard #15 AC "alternator" we all know runs with a simple solid slipring for the brush (second "brush" on some cast iron versions is the bearingpost itself, and the shaft acting as the second solid slipring), allowing the current to switch direction according to the magnetism induced, whereas a DC generator needs a split ring commutator, to keep a fixed positive and negative.

(Attachment Link)

If you look at the picture of Jack Boyle´s generator shared above by Nick, you can see that it has two "rings" for the brushes, one in each end of the shaft, making it possible to draw both AC and DC from the same permanent magnet.

Did that make any sense?

I do however wonder about Nicks new acquisition...
My eyes could be deceiving me, but it appears that it has just one commutator, and that looks like a split ring type, which would make this a pure DC generator.
Perhaps that would make this one even rarer than the "ordinary" dual output Jensen 15D?

Jan, thanks for the detailed explanation...now you have me wondering if I could modify a standard, modern Jensen 15 so that it produced both AC and DC... "should" be possible!

Rog