On Thu, 9 Aug 2018 14:32:23 -0700 (PDT), trader_4
wrote:

Fretwell's new interesting position is that phases disappear if they
are 180. And that also somehow also kills off other phases, because he says
if I take a 3 phase system and move the 120 phase to 180, POOF, it
becomes a single phase system.

Your scenario was 2 windings and if 2 windings have no angular
displacement (wound around the core, generator or transformer in the
same direction and excited in the same axis magnetically or
mechanically), the output is single phase.

In a 2 winding 3p system the 3d phase is induced by the angular
displacement of the other two.