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## DELTA vs WYE (STAR) Termination

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