On Fri, 3 Oct 2003 11:49:39 +0100, "stuart noble"
Most synchronous motors are of the "shaded pole" design. There's a
copper slug around half of the motor lamination stack, and it's this
that generates the two-phase field you need to make a motor rotate.
How you apply the electricity doesn't matter.
Phasing generally starts to make a difference when you have capacitors