Originally Posted by
DamianW
Delta wound has the applied voltage across one winding where as wye wound the applied voltage is across 2 windings at any given time.
To be technically accurate, applying voltage across one winding of a delta also applies it across the other two, since they are all connected. This is why 180-degree commutation (applying voltage to all three terminals) is almost always used with delta, where as wye works almost as well with 120-degree commutation (applying voltage across two of the three terminals).
A little rusty (I haven't done this for 8 years) but the number of turns changes by approximately square_root(3) or 1.73 for the same motor delta or wye wound.
That is correct.
Most of which is irrelevant for RC cars. From what I have seen with an equivalent power motor, delta wound motors are a little smoother which can be important in MOD.
There
shouldn't be any noticeable difference in torque ripple between the two; delta is technically a bit worse as the circulation current causes a bit of current ripple (and thus torque ripple) in some of the upper-order harmonics (3rd, 6th, and 9th ring a bell). That being said, the ESC behavior with the two different types of motors is going to play a significant role in how the overall system behaves.