Section 15.4: Performance Calculations cont.

Subtracting the rotor’s copper losses from the total rotor average power yields the average (per-phase) developed (electromagnetic) power: Pd = Pg - (|Ir|2Rr = sPg)

Ergo, or Pd = (1 - s)Pg

What’s Pd?

It’s the gross (per-phase) average mechanical power developed by the motor

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