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A single-phase AC induction motor is a brushless motor designed with a single stator coil. ST offers state-of-art, rugged devices such as TRIACs, thyristors and AC switches, allowing motor speeds to be regulated in various ways, depending on the cost and performance requirements of the final application.

  • Bi-directional drives

    When a motor with a permanent phase-shift capacitor is used, the direction of rotation can be reversed by means of two AC switches connecting the phase-shift capacitor in series with either of the two stator windings.

  • Phase-controlled drives

    ST offers a silent and cost-effective variable speed drive with an innovative topology to control motor speed. A simple phase-control switch is used to vary speed by changing the motor torque.

Part Number
Description
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
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-IHT001V2 Cold thermostat kit based on AC switches and the STM8S Quick view

Key Features

  • Low-cost solution for spark-free thermostats:
    • No need for a sealed version
    • Low-cost STM8S microcontroller for thermostat control
    • Low-cost capacitive power supply
  • High efficiency:
    • Refrigerator consumption reduction by adjusting and reducing the hysteresis threshold of the temperature
    • Improved efficiency by turning on the defrost resistor only when it's useful and not at each OFF cycle of the compressor (as done in some mechanical thermostats)
  • High system immunity:
    • Overvoltage protected ACS switches: ACST610-8FP for compressor control, ACS110-7SN for defrost resistor and ACS102-6TA for light bulb and fan
    • Class A criteria for IEC 61000-4-4 up to above 3 kV levels
  • Flexibility:
    • Development: program setting with PC interface to change firmware variables
    • Industrialization: end-of-production MCU programming thanks to FLASH, for soft upgrade and efficient MCU stock management
  • RoHS compliant

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FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-IHT007V1 Extension board with ACS switches for STM8S Discovery Kit Quick view

Key Features

  • Direct drive of 110/220 VAC loads
  • Opto-transistors to isolate the high voltage side
  • Zero voltage switching to synchronize Triac / AC switch pulses with AC mains
  • RoHS compliant

Show More

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
Part Number
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
Image

FEATURED RESOURCES

Schematics BOM Gerber
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-IHT001V2

Cold thermostat kit based on AC switches and the STM8S

Key Features

  • Low-cost solution for spark-free thermostats:
    • No need for a sealed version
    • Low-cost STM8S microcontroller for thermostat control
    • Low-cost capacitive power supply
  • High efficiency:
    • Refrigerator consumption reduction by adjusting and reducing the hysteresis threshold of the temperature
    • Improved efficiency by turning on the defrost resistor only when it's useful and not at each OFF cycle of the compressor (as done in some mechanical thermostats)
  • High system immunity:
    • Overvoltage protected ACS switches: ACST610-8FP for compressor control, ACS110-7SN for defrost resistor and ACS102-6TA for light bulb and fan
    • Class A criteria for IEC 61000-4-4 up to above 3 kV levels
  • Flexibility:
    • Development: program setting with PC interface to change firmware variables
    • Industrialization: end-of-production MCU programming thanks to FLASH, for soft upgrade and efficient MCU stock management
  • RoHS compliant

Show More

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
STEVAL-IHT007V1

Extension board with ACS switches for STM8S Discovery Kit

Key Features

  • Direct drive of 110/220 VAC loads
  • Opto-transistors to isolate the high voltage side
  • Zero voltage switching to synchronize Triac / AC switch pulses with AC mains
  • RoHS compliant

Show More

IMAGE

Image
Image

FEATURED RESOURCES

Schematics BOM Gerber
00 Files selected for download

Technical Documentation

    • Description Version Size Action
      AN4607
      Basics on the thyristor (SCR) structure and its application
      2.0
      317.41 KB
      PDF
      AN4363
      How to select the Triac, ACS, or ACST that fits your application
      2.1
      361.44 KB
      PDF
      AN3168
      Non-insulated SCR / Triac control circuits
      1.2
      315.8 KB
      PDF
      AN303
      Thyristors and TRIACs: latching current
      3.4
      164.96 KB
      PDF
      AN4607

      Basics on the thyristor (SCR) structure and its application

      AN4363

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

      AN3168

      Non-insulated SCR / Triac control circuits

      AN303

      Thyristors and TRIACs: latching current

Publications and Collaterals

    • Description Version Size Action
      T-series Triacs: immunity and commutation driven for AC appliances 3.0
      676.39 KB
      PDF

      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

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

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