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

STEVAL-IHM041V1

Overview

The STEVAL-IHM041V1 demonstration board is a Triac-based phase angle control for universal motor speed control using an STM8S103F3P6, 8-bit microcontroller, to set the conduction angle of the Triac.

The STEVAL-IHM041V1 demonstration board may be operated in either open loop mode or in closed loop speed control mode, with an AC tach, Hall sensor or opto-sensor feedback.
The open loop mode may also be used as a lamp dimmer.
The STEVAL-IHM041V1 demonstration board is designed to operate from a 120 V/60 Hz mains, but may be easily modified to operate on other mains voltages by changing components in the power supply and motor voltage sensing circuits. Suggested component values for 230 V/50 Hz mains voltages are shown in the relevant bill of materials.

Main 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

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-20 13:46:22

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