ST STEVAL-PTOOL2V1 Manuel utilisateur

Introduction

The STEVAL-PTOOL2V1 is a ready-to-use reference design tailored for medium voltage power tools driven by 3-phase

brushless motors and supplied from 8S to 15S batteries. It can also effectively be used in other battery-operated applications

requiring similar architecture, rating and performance.

The STEVAL-PTOOL2V1 is based on the STSPIN32F0252 motor controller which embeds a 3-phase 250 V gate driver, a

Cortex®‑M0 STM32 MCU and STL130N8F7 MOSFETs.

The power stage can be populated with any power MOSFET with similar ratings and hosted in a powerFLAT 5x6 package.

The board has a single shunt sensing topology. Field-oriented control (FOC) and sensored or sensorless 6-step control

implementation allows driving permanent magnet synchronous motors (PMSMs) and brushless DC (BLDC) motors.

This reference design can deliver up to 19 A of continuous current with very good thermal dissipation performance thanks to the

mounted heat-sink. It is compatible with a wide range (from 20 to 72 VDC) input voltage and includes a power supply stage with

the VIPER013BLS in buck configuration to generate +12 V and +3.3 V supply voltage required by the application.

The STEVAL-PTOOL2V1 embeds a potentiometer for speed variation and is fully protected from thermal shutdown,

undervoltage lockout and overcurrent.

It comes in a compact layout of 80 x 58 mm and includes the STSW-PTOOL2V1 six-step companion firmware that uses the

position feedback from Hall effect sensors.

The STSW-PTOOL2V1 firmware can be debugged and configured through an external ST-LINK debugger (ST-LINK/V2-1 or ST-

LINK/V3MINI).

Figure 1. STEVAL-PTOOL2V1 evaluation board

Getting started with the STEVAL-PTOOL2V1 compact reference design for

medium voltage brushless power tools based on STSPIN32F0252

UM2772

User manual

UM2772 - Rev 1 - October 2020

For further information contact your local STMicroelectronics sales office.

www.st.com

1Getting started

1.1 Safety precautions

Danger:

There is danger of serious personal injury, property damage or death due to electrical shock and

burn hazards if the kit or components are improperly used or installed incorrectly.

Warning:

• The kit is not electrically isolated from the high-voltage supply AC-DC input.

• The evaluation board is directly linked to the mains voltage. No insulation is ensured

between the accessible parts and the high voltage. All measurement equipment must be

isolated from the mains before powering the board.

• When using an oscilloscope with the evaluation board, it must be isolated from the AC line.

This prevents shock from occurring as a result of touching any single point in the circuit, but

does NOT prevent shock when touching two or more points in the circuit.

Caution: During assembly, testing, and operation, the evaluation board poses several inherent hazards, including bare

wires, moving or rotating parts and hot surfaces.

All operations involving transportation, installation, use and maintenance must be performed by skilled technical

personnel who is familiar with the installation, use and maintenance of power electronic systems.

Work area safety

• The work area must be clean and tidy

• Do not work alone when boards are powered

• Protect the area against any unauthorized access by putting suitable barriers and signs

• A system architecture that supplies power to the evaluation board must be equipped with additional control

and protective devices in accordance with the applicable safety requirements (i.e., compliance with technical

equipment and accident prevention rules)

Electrical safety

• Remove power supply from the evaluation board and electrical loads before performing any electrical

measurement

• Arrange measurement setup, wiring and configuration paying attention to high voltage sections

• Once the setup is complete, power the board

Danger:

Do not touch the evaluation board when it is powered or immediately after it has been

disconnected from the voltage supply as several parts and power terminals containing potentially

energized capacitors need time to discharge, and heat-sinks and transformers may still be very

hot.

The kit is not electrically isolated from the AC-DC input.

Personal safety

• Always wear suitable personal protective equipment, such as insulating gloves and safety glasses

• Take adequate precautions and install the board preventing accidental touch

• Use protective shields, such as insulating box with interlocks

UM2772

Getting started

UM2772 - Rev 1 page 2/28

1.2 Overview

The STEVAL-PTOOL2V1 features:

• 20 to 72 VDC input voltage

• Up to 250 V high voltage rail (limited to 100 V by on-board components)

• Up to 19 Arms output current

•STSPIN32F0252 featuring:

– 250 V, 1 A 3-phase gate driver

– Smart shutdown OCP

– Cortex-M0 STM32

•STL130N8F7 MOSFET power stage with:

– VDS = 80 V

– RDS(on) max. = 3.6 mΩ

– 5x6 PowerFlat package

• Single shunt current sensing for:

– Sensored or sensorless 6-step algorithm

– Single shunt vector algorithm

• Digital Hall sensors and encoder input

• Plug-and-play thanks to the six-step firmware with Hall-effect sensor feedback

• Speed regulation through an external trimmer

• Heat-sink for the best power dissipation performance

• Fully protected:

– Thermal shutdown

– Undervoltage lockout

– Overcurrent protection

• Compact footprint (80 x 58 mm)

• Bus voltage sensing

• 12 V VCC and 3.3 V VDD supplies

• Serial wire debug (SWD) port for debugging/programming

• UART TX-RX interface

• Simple user interface with buttons and trimmer

• RoHS compliant

1.3 Hardware and software requirements

To use the STEVAL-PTOOL2V1 board, you need:

• a Windows (XP, Vista, 7, 8 or 10) PC

•ST-LINK debugger/programmer for STM32

•STSW-PTOOL2V1 firmware

• a three-phase brushless or PMSM motor with compatible current and voltage ranges

• External DC power supply

1.4 Evaluation board intended use

The STEVAL-PTOOL2V1 is intended for evaluation purposes only and must not be used for electrical installations

or machinery. Technical data and information concerning the power supply conditions should be strictly observed.

UM2772

Overview

UM2772 - Rev 1 page 3/28

1.5 Installing the board

• The installation and cooling down of the evaluation board must be in accordance with the specifications and

target application

• The motor drive converters must be protected against excessive strain. In particular, components should not

be bent or isolating distances altered during transportation or handling

• No contact must be made with other electronic components and contacts

• The evaluation board contains electrostatic sensitive components that could be damaged if used incorrectly

UM2772

Installing the board

UM2772 - Rev 1 page 4/28

2Hardware description and configuration

Figure 2. STEVAL-PTOOL2V1 circuitry main blocks - top view

1. SWD, UART, GPIOs

2. Power supply

3. Feedback network

4. STSPIN32F0252

UM2772

Hardware description and configuration

UM2772 - Rev 1 page 5/28

Figure 3. STEVAL-PTOOL2V1 circuitry main blocks - bottom view

1. Power stage

2. Shunt resistor

3. Heat sink mounting hole

4. Heat sink mounting hole

5. Heat sink mounting hole

6. Heat sink mounting hole

UM2772

Hardware description and configuration

UM2772 - Rev 1 page 6/28

Figure 4. STEVAL-PTOOL2V1 main components and connectors

1. J3 external trigger

2. VBAT-

3. VBAT+

4. J8 W phase

5. J7 V phase

6. J6 U phase

7. J2 Hall encoder connector

8. J1 external speed regulation potentiometer

9. TR1 speed regulation trimmer

10. SW1 spinning direction switch

11. J9 external direction switch

12. J10 UART SWD - GPIO connector

13. J11 SWD connector

14. SW2 trigger button

Table 1. Jumper settings

Jumper Permitted configurations Default condition

JP1 External reset (connected through soldering pads) OPEN

JP2 Selection PA0 connected to BEMF phase U (1-2 CLOSED) or Hall 1 (2-3 CLOSED) (2-3 CLOSED)

JP3 Selection PA1 connected to BEMF phase V (1-2 CLOSED) or Hall 2 (2-3 CLOSED) (2-3 CLOSED)

JP4 Selection PA2 connected to BEMF phase W (1-2 CLOSED) or Hall 3 (2-3 CLOSED) (2-3 CLOSED)

UM2772

Hardware description and configuration

UM2772 - Rev 1 page 7/28

Table 2. Connectors and test points

Name Pin Label Description

J1 1-2-3 J1 External potentiometer connector (remove R70 if used)

1 A+/H1

Hall/encoder sensor connector2 B+/H2

3 Z+/H3

4 VDD

Hall sensor/encoder supply

5 GND

J3 1-2 J3 External trigger switch

J4 1 VBAT+ Battery positive terminal

J5 1 VBAT- Battery negative terminal

J6 1 OUT U

3-phase BLDC motor phases connectionsJ7 1 OUT V

J8 1 OUT W

J9 1-2-3 J9 External direction switch connector (remove R68 if used)

J10

NRST – MCU reset

2 GND

3 SWDIO – MCU debug IO port

4 PB1 MCU GPIO

5 GND

6 PB0 MCU GPIO

7 SWCLK – MCU debug clock port

8 VBUS_fdbk (PA7) – Battery supply MCU monitor

9 VDD – MCU supply

10 CURRENT_REF (PA6) – current reference for 6-step current mode control

11 PA15 MCU GPIO

12 Curr_fdbk (PA5) – shunt current MCU sensing

13 PB3 MCU GPIO

14 Temp_fdbk (PA4) – Power bridge MCU monitor

15 UART1_TX (PB6) – MCU uart transmit

16 PA3 MCU GPIO – Speed set point MCU monitor

17 UART1_RX (PB7) – MCU UART receive

18 PF1 MCU GPIO

19 BOOT0 – MCU bootloader selector

20 PB8 MCU GPIO

J11

1 SWD IO

Auxiliary connector for SWD mode debugging/programming

2 SWD CLK

3 GND

UM2772

Hardware description and configuration

UM2772 - Rev 1 page 8/28

Table 3. Test points

Name Pin Label Description

TP1 - TP1 W phase high side gate

TP2 - OUT3 W phase

TP3 - TP3 RES3

TP4 - TP4 RES2

TP5 - TP5 W phase low side gate

TP6 - TP6 RES1

TP7 - TP7 SENSE

TP8 - TP8 PB4 MCU GPIO

TP9 - TP9 V phase high side gate

TP10 - TP10 V phase

TP11 - TP11 V phase low side gate

TP12 - TP12 SENSE

TP13 - TP13 Speed set point

TP14 - GND GND – signal ground

TP15 - PGND PGND – power ground

TP16 - TP16 PB5 GPIO

TP17 - OD OD – Smart SD Open Drain output, unlatch and restart input

TP18 - TP18 U phase high side gate

TP19 - TP19 U phase

TP20 - TP20 U phase low side gate

TP21 - TP21 SENSE

TP22 - TP22 CIN – comparator positive input

UM2772

Hardware description and configuration

UM2772 - Rev 1 page 9/28

3How to use the board

Step 1. Check the jumper position according to the target configuration (see Section 2 Hardware description

and configuration).

Step 2. Connect the motor phases to J6, J7 and J8 pads on the basis of the motor phase sequence.

Step 3. Supply the board through DC J4 (VBAT+) and J5 (VBAT-) pads.

Step 4. Develop your application using the STSW-PTOOL2V1 firmware example package as starting point.

3.1 Sensorless mode

To configure the STEVAL-PTOOL2V1 evaluation board for 6-step sensorless mode, BEMF network components

(R65, R66, R67) have to be mounted and the BEMF detection network must be enabled.

You have to set jumpers as follows:

• JP2 pins 1-2: closed, PA0 connected to BEMF phase U

• JP3 pins 1-2: closed, PA1 connected to BEMF phase V

• JP4 pins 1-2: closed, PA2 connected to BEMF phase W

UM2772

How to use the board

UM2772 - Rev 1 page 10/28

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