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
  • Inverter shoot-through' possible, requires dead-time' circuits and compensation

Read more

Freescale 3-Phase AC Induction Motor application block diagram

Recommended Solutions


Products Features
Controllers (MCU and DSC)
MC56F827xx: MC56F823xx and MC56F827xx Digital Signal Controllers MC56F823xx for advanced motor control; 5 mm x 5 mm package option
KV4x: Kinetis KV4x - 150 MHz, Precision, Sensing, Motor and Power Control, High Performance Microcontrollers (MCUs) 150 MHz Cortex-M4 core with DSP, floating point unit, eFlexPWM module with 312ps resolution and dual FlexCAN
MC56F84xxx: Digital Signal Controllers 100 MHz/100 MIPS, 256 KB flash, 320ps PWM, 2x12-bit ADCs
VF6xx: Vybrid family with ARM® Cortex™-A5 + Cortex-M4, 1.5MB SRAM, LCD, security, 2x Ethernet, L2 switch ARM Cortex-A5 500MHz, Cortex-M4 167MHz, 1.5M SRAM, Display, dual 10/100 ETH, dual CAN, PMU, <1W
Software and Tools
FreeMASTER Run-Time Debugging Tool Real-time control and debugging tool for Digital Signal Controllers
Embedded Software Motor Control Libraries Embedded Software and Motor Control Libraries
Kinetis Motor Suite Kinetis motor suite for tuning, observing and managing motor control system operation
Solution Advisor: Interactive Product Selector Guide Online and interactive Motor Control product selector
Advantages