ST IHM041V1 User Manual

Universal motor driver with speed control

based on the STM8 and Triac (US version)

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

STEVAL-IHM041V1

Databrief

Description

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

July 2012 Doc ID 023423 Rev 1 1/4

This is information on a product in full production.

www.st.com

4

Schematic diagram STEVAL-IHM041V1

AM12468v1

PB3

DNI

GND

PB2

DNI

PB1

PB1

PB2

PB3

1

2

J2

TX

115VAC

COMMUNICATIONS

out1gnd2gnd3NC

4

NC

5

gnd

6

gnd

7

in

8

U2

L7805ACD13

1

2

P2

R15

47

C4

470F 10V

GND

R16

0.01

10V

Z1

5V

Q1

T1635T

C1

0.22uF

gate

6

5

7

-

+

8

4

U1B

R13

1K

R11

22K

R7

100K

ZC

R17

5K

5V

C3

220uF 10V

MOTOR CONNECTION

POWER SUPPLY

R8

100K

R14

100K

R19

47K

1

2

3

4

J1

swim

C5

0.22uF

GND

5V

C6

0.22uF

LED5

DNI

pd41tx2rx3nrst4oscin5oscout6Vss7Vcap8Vdd9pa3

10

pb5

11

pb4

12

pc3

13

ain2

14

pc5

15

pc6

16

pc7

17

swim

18

ain3

19

ain4

20

U4

STM8S103F3P6

GND

5V

swim

TX

R18

2.2K

R25

2.2K

PB1

PB2

PB3

ZC

VFB

R26

2.2K

R20

100

R21

100

R22

2.2K

R23

2.2K

LED3

DNI

LED2 Red LED

LED4

DNI

LED1

DNI

gate

5V

5V

DEBUG

5V

CURRENT SENSIN G

6

5

7

-

+

8

4

U3B

MOTOR VOLTAGE SENSING

GND

5V

GND

2

3

1

-

+

8

4

U1A

R6

39K

R3 39K

R1 1K

R9 2K

GND

5V

VFB

R10 2K

5V

10R4DNI

R5

39K

R2 39K

2

3

1

-

+

8

4

U3A

LM393

R24

10K

5V

R30

10

VFB

C7

47nF

GND

1

2

3

4

J3

R32

10K

5V

R31

2K

R28

22K

5V

R33

10K

R29

2K

R27

200K

TACHOMETER INTERFACE

R12

MOV

1

TP1

1

TP2

D1

1N4148

D2

D3

C2

2.2uF 250V

1

2

P1

1

2

J4

1 Schematic diagram

Figure 1. Schematic diagram

2/4 Doc ID 023423 Rev 1