The 3-Phase AC induction motor is a rotating electric machine designed to operate from a three-phase source of alternating voltage. The stator is a classic three phase stator with the winding displaced by 120°.
Medium construction complexity, multiple fields on stator, cage on rotor
High reliability (no brush wear), even at very high achievable speeds
Medium efficiency at low speed, high efficiency at high speed
Driven by multi-phase Inverter controllers
Motor EMI good but…terrible EMI from Inverter
Sensorless speed control possible
Low cost per horsepower, though higher than for 1-ph AC induction motor
Higher start torque than for 1-ph, easy to reverse motor
Pump Motor (2)
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