3-Phase AC Induction Motor  Favorite


The 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-phase AC induction motor
  • Higher start torque than for 1-phase, easy to reverse motor

  • Freescale 3-Phase AC Induction Motor application block diagram

      Click to view Interactive elements
  • Motor Control Demo Using Kinetis V Series MCUs and Kinetis Motor Suite

  • Getting Started with Kinetis V and Motor Control Tower Modules - How To

Community Demo

Explore the MC34937, an industrial-grade 3-phase gate pre-driver for BLDC and PMSM motor control. The MC34937 can support 12V, 24V, and 36V motor control applications and easily interfaces to standard MCUs and DSPs.

See more demos at the Freescale Community >

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