STMicroelectronics STEVAL-IHM029V1 User manual

May 2010 Doc ID 17259 Rev 1 1/23

UM0922

User manual

STEVAL-IHM029V1:

2000 W universal motor control based on the STM8S103F2

Introduction

The STEVAL-IHM029V1 is a low-cost universal motor control demonstration board

designed for the home appliance market, with particular focus on vacuum cleaners, food

processors and power tools.

This system features the 20-pin, 8-bit STM8S103F2 microcontroller running at 16 MHz (RC

user-trimmable internal RC clock), featuring 4 KB of Flash memory, a 10-bit A/D converter,

8/16 bit timers, communication interfaces and 640 bytes E2PROM.

The power supply circuitry is based on the VIPer16LN, an off-line converter with an 800 V

avalanche-rugged power section, operating at 60 kHz.

The STEVAL-IHM029V1 can control any universal motor up to 2000 W, thanks to the

T1235H, a 12 A 600 V high temperature Triac. The motor control is based on phase-angle.

In order to limit the in-rush current and possible current peaks, the demonstration board

features a soft-start routine and a smooth power change function.

The board has passed the pre-compliance tests for EMC directives IEC 61000-4-4 (burst up

to 8 kV) and IEC 61000-4-5 (surge up to 2 kV).

In standby mode, the STEVAL-IHM029V1 has an overall standby power consumption below

300 mW.

Figure 1. STEVAL-IHM029V1

www.st.com

Contents UM0922

2/23 Doc ID 17259 Rev 1

Contents

1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Target applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Schematic diagram and bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7 Oscilloscope waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 EMC test results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9 How to connect the STEVAL-IHM029V1 . . . . . . . . . . . . . . . . . . . . . . . . 15

10 How to operate the STEVAL-IHM029V1 . . . . . . . . . . . . . . . . . . . . . . . . . 16

11 Firing angle table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

12 The STEVAL-IHM029V1 layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

13 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

14 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

UM0922 List of figures

Doc ID 17259 Rev 1 3/23

List of figures

Figure 1. STEVAL-IHM029V1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2. STEVAL-IHM029V1 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3. STEVAL-IHM029V1 circuit schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4. Phase-angle control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5. Motor running at the lowest power level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 6. Motor working at the highest power level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 7. Zero-voltage switching (ZVS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8. Soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9. Demonstration board overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 10. STEVAL-IHM029V1 silkscreen (top) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 11. STEVAL-IHM029V1 top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 12. STEVAL-IHM029V1 bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Safety instructions UM0922

4/23 Doc ID 17259 Rev 1

1 Safety instructions

Warning: The high voltage levels used to operate the STEVAL-

IHM029V1 could present a serious electrical shock hazard.

This demonstration board must be used in a suitable

laboratory environment only, by qualified personnel who are

familiar with the installation, use, and maintenance of power

electrical systems.

Intended use

The STEVAL-IHM029V1 is designed for demonstration purposes only, and must not be

used in domestic or industrial installations. The technical data, as well as the information

concerning the power supply and working conditions, must be taken from the

documentation included in the kit and strictly observed.

Installation

The installation of the STEVAL-IHM029V1 is described in this document.

The components must be protected against excessive strain. In particular, no components

should be bent, or isolating distances altered during the transportation, handling or use.

No contact must be made with electronic components and contacts.

The STEVAL-IHM029V1 contains electrostatically sensitive components, which may be

damaged if used improperly. To avoid risk of injury, ensure that electrical components are

not mechanically damaged.

Electrical connection

Applicable accident prevention rules must be followed when working from the mains power

supply. The electrical installation must be completed in accordance with the appropriate

requirements (e.g. cross-sectional areas of conductors, fusing and PE connections).

Board operation

A system architecture which supplies power to the demonstration board must be equipped

with additional control and protective devices, in accordance with the applicable safety

requirements (e.g. compliance of equipment and accident prevention rules).

Warning: Do not touch the board after disconnection from the mains,

as several parts and power terminals could contain an

electrical charge due to energized capacitors, which must be

allowed to discharge completely.

UM0922 Main features

Doc ID 17259 Rev 1 5/23

2 Main features

The main features of the STEVAL-IHM029V1 demonstration board are listed below.

●Input voltage range: 90-265 VAC, 50/60 Hz

●12 VDC / 5 VDC auxiliary power supply based on the VIPer16LN in buck converter

topology

●Total power consumption below 300 mW in standby mode

●Maximum output power: 2000 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 T1235H high-temperature 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

Target applications UM0922

6/23 Doc ID 17259 Rev 1

3 Target applications

As a universal motor control demonstration, the STEVAL-IHM029V1 is mainly target at the

home appliance market for applications including:

●vacuum cleaners

●food processors

●power tools

UM0922 Block diagram

Doc ID 17259 Rev 1 7/23

4 Block diagram

The universal motor control system can be divided into a few simple blocks.

Figure 2. STEVAL-IHM029V1 block diagram

Power supply

The power supply is designed using a buck converter topology and is based on the

VIPer16LN, which works at a fixed frequency of 60 kHz. The wide range input voltage (90-

265 VAC, 50/60 Hz), allows the demonstration board to operate at either 110 VAC/60 Hz, or

220 VAC/50 Hz. The converter output voltage is -12 VDC. This voltage is sent to a L7905CP

linear regulator, which in turn provides a reference voltage of -5 VDC. The negative power

supply is highly recommended when driving a Triac directly with a microcontroller.

ZVS

The zero-voltage switching signal is captured directly from the input mains. The MCU

detects the ZVS after each period of the input mains, and synchronizes the routines and

events accordingly (i.e. the driving of the Triac).

User interface

The user interface consists of a potentiometer to adjust the output power level, and 6 LEDs

to indicate the status and the power level of the board.

Motor driving

The universal motor is driven by a high temperature Triac in phase-angle control.

STM8S103F2

The entire process is controlled by a 20-pin, 8-bit STM8S103F2 microcontroller.

Schematic diagram and bill of material UM0922

8/23 Doc ID 17259 Rev 1

5 Schematic diagram and bill of material

Figure 3. STEVAL-IHM029V1 circuit schematic

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UM0922 Schematic diagram and bill of material

Doc ID 17259 Rev 1 9/23

Table 1. BOM

Reference Part Supplier

C1 47 nF, 275 V, X2 EPCOS

C2, C3 4.7 µF, 400 V EPCOS

C6, C9 10 µF, 25 V

C4, C22 1 nF, 0805 SMD

R2, R3, C4 Not mounted

C7, C10 100 nF, 0805 SMD

C8 100 µF, 25 V

C11, C23 10 nF, 0805 SMD

C12 1 µF, 1208 SMD non-pol

DL1 10 mA, 3 mm, radial-green

DL2, DL3, DL4, DL5, DL6 10 mA, 3 mm, radial-red

D1, D2 1N4007

D3, D4, D5 STTH1R06 STMicroelectronics

D6 P6KE400CA Transil™ STMicroelectronics

J1, J2 CON 2-pin 5 mm

J3 Strip line 4-pin 2.54 mm

L1 1 mH radial Coilcraft

L2 470 µH radial Coilcraft

P1 50 kΩtrimmer

RV1 300 V 595+ varistor

R1 47 Ω2 W flame proof

R4 33 kΩ0805 SMD

R5 90 kΩ0805 SMD

R24, R25 220 kΩ0.6 W 5%

R26 75 Ω0.6 W 5%

R27, R28, R29, R30, R31, R32 820 Ω1208 SMD

TP1, TP2 Test point

TR1 T1235H-6I STMicroelectronics

U1 VIPER16LN STMicroelectronics

U2 L7905CP STMicroelectronics

U3 STM8S103F2P6 STMicroelectronics

Functional description UM0922

10/23 Doc ID 17259 Rev 1

6 Functional description

The driving of the motor is based on phase-angle control.

Figure 4. Phase-angle control

The MCU operation is synchronized with the voltage mains thanks to the zero-voltage

switching (ZVS) signal. This signal is sent directly to an MCU input pin, which is set as

external interrupt.

The Triac is turned on by sending a pulse to the Triac gate. The Triac turns off when the

voltage mains crosses 0 V.

The firing angle determines the power delivered to the motor; the lower the angle, the higher

the power.

Firing angle and gate pulse length are defined by software. At a mains frequency of 50 Hz,

the demonstration board has a firing angle ranging between 2.5 ms and 8.5 ms, and a

constant gate pulse length of 1 ms.

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