Quick question for folks here.
Our club right now uses PH180s everywhere for power (like 12 of them), and we're very happy with them, but we want more current, 4-5 locomotives in lashup is going to become a thing shortly (Christmas was good to me).... our layout is getting to the point where we can't really break it up into more blocks, it's already 20 independent blocks for DCS (5 TIUs X 4 ports each), and we don't want to use Z-transformers because we don't like how they each need to be independently reset when the power goes on. Also PH180s have less harmonics coming out since they are a pure magnetic without a chopper, which has advantages.
Does anyone know if multiple PH180s can be stacked in parallel? or has anyone done this? My initial thoughts are ... you need to wire them phase matched (obviously) but even still there will be some *presumably but not necessarily small current* circulating between the two transformers because their output voltages and output resistances won't be *perfectly* matched. That may be small. I don't have a sense of the variation from PH180 to PH180. Also the mismatches means the load wouldn't be balanced between both PH180s and one would be favored (again by output resistance variation). Finally if one is switched on and one is switched off that would probably cause problems since the off ones secondary is energized and being a step up to produce an unexpected 110V.
Or is there any other fixed source that's bigger than 180W (short of winding our own transformer)?