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UM1559

Description
The STEVAL-IHM041V1 is a Triac based phase angle control for universal motor speed
File Size514KB,13 Pages
ManufacturerSTMicroelectronics
Websitehttp://www.st.com/
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UM1559 Overview

The STEVAL-IHM041V1 is a Triac based phase angle control for universal motor speed

UM1559
User manual
STEVAL-IHM041V1: hardware description
Introduction
The STEVAL-IHM041V1 is a Triac based phase angle control for universal motor speed
control using an STM8S103F3, 8-bit microcontroller, to set the conduction angle of the Triac.
The 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 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 other mains voltages are shown
in the alternate bill of materials.
On power-up, the firmware determines if jumper J4 is installed or not. The board operates in
open loop mode if J4 is not installed and in closed loop mode if J4 is installed. When
operating in closed loop mode, an AC tach or a hall effect device is connected to J3 to
provide speed feedback.
Figure 1.
Board image
November 2012
Doc ID 023542 Rev 1
1/13
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