You are right, all three measurements between the phase connectors should have the same value.
Maybe you know the amount of wire you used for the coils. So you can calculate what resistance
one phase should have.
Again i have to ask how the stator plates are connected itself. Is each statorplate one phase or has
each statorplate three phases ? If each plate has three phases you shouldn't connect the three plates
together before the rectivier.
Grüsse
Bernd