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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.

Featured Products

Part Number
Description
STEVAL-IHM041V1 Universal motor driver with speed control based on the STM8 and Triac (US version) Quick view

Key Features

  • Input voltage 120 V/60 Hz
  • Motor current: 7 A RMS
  • Phase control for universal motor drive
  • Open loop or closed loop speed regulation
  • Voltage and current sensing, for sensorless operation (optional)
  • Debug outputs
  • AC tach, Hall sensor or opto-sensor for speed feedback
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-GLA001V1 Triac and AC switch insulated control evaluation board Quick view

Key Features

  • Insulated control of three different AC switches used to drive AC loads up to 1 kW (230 Vrms) for residential appliances
  • Interface with STM32 Nucleo-64 development board
  • Three control modes available thanks to STM32 Nucleo-64 firmware (continuous or pulse gate current, timer option and phase control)
  • Easy to configure through user-friendly interface
  • Compatible with any external microcontroller
  • Input voltage range: 90 VAC to 265 VAC 50 / 60 Hz
  • Operating temperature: 0 °C to 60 °C
  • 5 V and 3.3 V insulated power supply
  • Low standby power losses (< 300 mW)
  • Criteria A @ 2 kV IEC 61000-4-4
  • Criteria B @ 4 kV IEC 61000-4-4
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-IHM029V2 Universal motor control evaluation board based on the STM8S103F2 MCU and T1235T Triac Quick view

Key Features

  • Input voltage range: 90-265 VAC, 50/60 Hz
  • 12 VDC / 5 VDC auxiliary power supply based on the VIPer16L in buck converter topology
  • Total power consumption below 300 mW in standby mode
  • Maximum output power: 1500 W
  • 20-pin, 8-bit STM8S103F2 MCU as main controller
  • Employs zero-voltage switching (ZVS) to synchronize MCU events with the voltage mains
  • Motor driven by T1235T Triac in phase-angle control
  • 5 power levels and standby mode selectable by potentiometer
  • 5 LEDs to display the power level of the board
  • “RUN” LED to indicate the board is functioning
  • Standard in-circuit programming connector
  • IEC 61000-4-4 pre-compliance test passed (burst up to 8 kV)
  • IEC 61000-4-5 pre-compliance test passed (surge up to 2 kV)
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
Part Number
STEVAL-IHM041V1

Universal motor driver with speed control based on the STM8 and Triac (US version)

Key Features

  • Input voltage 120 V/60 Hz
  • Motor current: 7 A RMS
  • Phase control for universal motor drive
  • Open loop or closed loop speed regulation
  • Voltage and current sensing, for sensorless operation (optional)
  • Debug outputs
  • AC tach, Hall sensor or opto-sensor for speed feedback
  • RoHS compliant

Show More

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-GLA001V1

Triac and AC switch insulated control evaluation board

Key Features

  • Insulated control of three different AC switches used to drive AC loads up to 1 kW (230 Vrms) for residential appliances
  • Interface with STM32 Nucleo-64 development board
  • Three control modes available thanks to STM32 Nucleo-64 firmware (continuous or pulse gate current, timer option and phase control)
  • Easy to configure through user-friendly interface
  • Compatible with any external microcontroller
  • Input voltage range: 90 VAC to 265 VAC 50 / 60 Hz
  • Operating temperature: 0 °C to 60 °C
  • 5 V and 3.3 V insulated power supply
  • Low standby power losses (< 300 mW)
  • Criteria A @ 2 kV IEC 61000-4-4
  • Criteria B @ 4 kV IEC 61000-4-4
  • RoHS compliant

Show More

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-IHM029V2

Universal motor control evaluation board based on the STM8S103F2 MCU and T1235T Triac

Key Features

  • Input voltage range: 90-265 VAC, 50/60 Hz
  • 12 VDC / 5 VDC auxiliary power supply based on the VIPer16L in buck converter topology
  • Total power consumption below 300 mW in standby mode
  • Maximum output power: 1500 W
  • 20-pin, 8-bit STM8S103F2 MCU as main controller
  • Employs zero-voltage switching (ZVS) to synchronize MCU events with the voltage mains
  • Motor driven by T1235T Triac in phase-angle control
  • 5 power levels and standby mode selectable by potentiometer
  • 5 LEDs to display the power level of the board
  • “RUN” LED to indicate the board is functioning
  • Standard in-circuit programming connector
  • IEC 61000-4-4 pre-compliance test passed (burst up to 8 kV)
  • IEC 61000-4-5 pre-compliance test passed (surge up to 2 kV)
  • RoHS compliant

Show More

IMAGE

Image
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FEATURED RESOURCES

Schematics BOM Gerber
00 Files selected for download

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

Microcontrollers & Microprocessors

Part number Description
STM8S105S4 Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM
Part number
Mainstream Access line 8-bit MCU with 16 Kbytes Flash, 16 MHz CPU, integrated EEPROM

Thyristors (SCR) and AC Switches

Part number Description
ACST1035-8FP Overvoltage protected 10 A 800 V AC switch
ACST1235-8FP Overvoltage protected AC switch
ACST1635-8FP Overvoltage protected AC switch
T1235H 12 A - 600 V - 150 °C H-series Triacs
T1635H 16 A - 600 V - 150 °C H-series Triacs
T2035H 20 A - 600 V - 150 °C H-series Triacs
T3035H 30 A - 600 V - 150 °C H-series Triacs
T835H 8 A - 600 V - 150°C H-series Triacs
Part number
Overvoltage protected 10 A 800 V AC switch
Overvoltage protected AC switch
Overvoltage protected AC switch
12 A - 600 V - 150 °C H-series Triacs
16 A - 600 V - 150 °C H-series Triacs
20 A - 600 V - 150 °C H-series Triacs
30 A - 600 V - 150 °C H-series Triacs
8 A - 600 V - 150°C H-series Triacs