I bought a few 30 watt 3 phase motor/generators in supposedly delta configuration from a ali express. the motor did have only 3 wires coming out, plus the manual stating it, I am pretty sure this was supposed to be a delta set up. I opened one up and interestingly there were 10 poles for the magnet, which is already out of phase with what I have known so far to be the optimal range for 3 phase motors to work in, where the magnets hit all the coils of one phase at the same time. But more troubling was when i did a connectivity test between coils, and all interact with each other. with the 3 output wires not touching of course.
Now oddly enough they still manage to generate some electricity which made me wonder, is this some sort of set up that is usually used in the industry? or are they just made wrong? I have yet to take it apart to see if the coils are coiled all in the same direction, or which ones are in which direction, but any insight would be appreciated.