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Universal motors can be used with AC or DC supplies and are commonly used in consumer appliances such as mixers, fans and vacuum cleaners.
Most universal motors are unidirectional. Bidirectional motors using two coils on the stator can be driven by applying a voltage to only one of them for the respective direction. The advantages of universal motors are high starting torque, very compact design and high speed. A simple controller with an AC supply can be implemented using a low-end microcontroller and a single Triac or an AC switch.

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Technical Documentation

    • Description Version Size Action
      AN414
      Controlling a brushed DC motor with an ST6265C or ST6260C MCU
      2.1
      278.05 KB
      PDF
      AN1448
      How to reduce 3rd harmonics with ST6200C motor control software
      1.5
      155.81 KB
      PDF
      AN4363
      How to select the Triac, ACS, or ACST that fits your application
      2.1
      361.44 KB
      PDF
      AN2316
      Improved ST7LITE05 AC Chopper Driver Solution
      1.5
      434.99 KB
      PDF
      AN422
      Improved Universal Motor Drive
      1.5
      111.37 KB
      PDF
      AN863
      Improved sensorless control with the ST62 MCU for universal motor
      2.4
      198.77 KB
      PDF
      AN441
      Inductive load control with AC switches
      3.2
      712.21 KB
      PDF
      AN392
      Microcontrollers and TRIAC-based dimmers
      2.3
      132.78 KB
      PDF
      AN2777
      New high-temperature, high-performance TRIACs for optimized vacuum cleaner designs
      1.2
      303.15 KB
      PDF
      AN533
      SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting
      3.6
      217.19 KB
      PDF
      AN1015
      Software techniques for improving microcontrollers EMC performance
      2.1
      342.1 KB
      PDF
      AN1172
      THE NEW ACS SERIES: SERIES A BREAKTHROUGH IN RUGGEDNESS & DRIVE FOR HOME APPLIANCES
      2.5
      282.31 KB
      PDF
      AN414

      Controlling a brushed DC motor with an ST6265C or ST6260C MCU

      AN1448

      How to reduce 3rd harmonics with ST6200C motor control software

      AN4363

      How to select the Triac, ACS, or ACST that fits your application

      AN2316

      Improved ST7LITE05 AC Chopper Driver Solution

      AN422

      Improved Universal Motor Drive

      AN863

      Improved sensorless control with the ST62 MCU for universal motor

      AN441

      Inductive load control with AC switches

      AN392

      Microcontrollers and TRIAC-based dimmers

      AN2777

      New high-temperature, high-performance TRIACs for optimized vacuum cleaner designs

      AN533

      SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting

      AN1015

      Software techniques for improving microcontrollers EMC performance

      AN1172

      THE NEW ACS SERIES: SERIES A BREAKTHROUGH IN RUGGEDNESS & DRIVE FOR HOME APPLIANCES

Publications and Collaterals

    • Description Version Size Action
      H Series TRIACs : high application robustness 150°C TRIACs 1.0
      477.86 KB
      PDF
      T-series Triacs: immunity and commutation driven for AC appliances 3.0
      676.39 KB
      PDF

      H Series TRIACs : high application robustness 150°C TRIACs

      T-series Triacs: immunity and commutation driven for AC appliances

    • Description Version Size Action
      Thyristors, Triacs, AC switches and A.S.D™ selection guide 2.0
      1.51 MB
      PDF

      Thyristors, Triacs, AC switches and A.S.D™ selection guide

    • Description Version Size Action
      Motor Control Reference Guide 15.10
      2.61 MB
      PDF

      Motor Control Reference Guide

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