This page contains additional information that doesn't fit in on any of the other pages.
DELTA vs WYE
Theoretically, the ratio between Delta and Wye is 1.732 (square root of 3). However, in practise this number is closer to 1.8.
Therefore, a motor with a given number of turns, terminated WYE, would yield ~1.8 times more Kt (torque per amp) than a similarly wound motor that is terminated Delta, while the Kv (RPM/volt) would be ~1.8 times lower.
Delta Kv is 1.8 higher than WYE, while Delta Kt would be 1.8 times lower.
Put differently; with a WYE termination, 1.8 times less turns are needed to get the same Kv as with Delta.
Kt = 1/Kv (in SI units)
Torque = Kt x current (amps)
Consider this: A motor is wound to a certain Kv with either Delta or Wye termination.
If the motor is rewound to have
Winding Diagram Table
CD-ROM Winding Instructions
These winding instructions is for the Apex Mini300 motor, but it's typical for a common 9-tooth, 12-pole (9N12P) CD-ROM motor.
ESC Max. RPM Limits
Brushless speed controllers (ESCís) have maximum RPM limits at which motors can be driven.