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Universal Motor Control AC Drive

Such motors are used in AC applications not requiring continuous operation mode. The AC universal motor drive controls the rotation speed by means of phase-angle partialization. This method consists of changing the RMS voltage applied to the motor. In this case, the voltage is a function of the firing angle of the Triac. The high commutation capability of ACST family device switches enables a fast change in the firing angle. The conduction angle (α), or firing angle, varies theoretically from 0° to 180°. ST offers a broad selection of products addressing all aspects of these kinds of applications, helping you reach your goals of high-reliability robustness.

Design Support

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Technical Documentation

Application Notes

Description Version Size
pdf
AN1015: Software techniques for improving microcontrollers EMC performance
2.0 342 KB
pdf
AN1172: THE NEW ACS SERIES: SERIES A BREAKTHROUGH IN RUGGEDNESS & DRIVE FOR HOME APPLIANCES
2.1 282 KB
pdf
AN1448: How to reduce 3rd harmonics with ST6200C motor control software
1.3 156 KB
pdf
AN1894: VIPower: VIPer12A non insulated buck and buck-boost converter reference board
1.2 305 KB
pdf
AN2300: An alternative solution to capacitive power supply using buck converter based on VIPer12A
1.2 265 KB
pdf
AN2316: Improved ST7LITE05 AC Chopper Driver Solution
1.3 435 KB
pdf
AN2786: STEVAL-IHI001V1 demonstration board: washing machine user interface based on the ST7LITE49M and STLED316S
1.2 222 KB
pdf
AN422: Improved Universal Motor Drive
1.4 111 KB
pdf
AN4363: How to select the right Triac
1.1 337 KB
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AN439: Snubberless™ and logic level TRIAC behavior at turn-off
3.3 458 KB
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AN533: SCRs, TRIACs, and AC switches, thermal management precautions for handling and mounting
3.3 217 KB
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AN863: Improved sensorless control with the ST62 MCU for universal motor
2.2 199 KB

Publications and Collaterals

Flyer

Description Version Size
pdf
ACST series : overvoltage protected AC switches
1,435 KB
pdf
T-series Triacs: immunity and commutation driven for AC appliances
1,253 KB

Selection Guides

Description Version Size
pdf
Thyristors, Triacs, AC switches and A.S.D™ selection guide
1,717 KB

Brochure

Description Version Size
pdf
Motor Control Reference Guide
3,426 KB
pdf
STM8 8-bit MCU family
1,750 KB
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