ST X-NUCLEO-IHM11M1 User manual

August 2016

DocID029570 Rev 1

1/11

www.st.com

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User manual

Getting started with the X-NUCLEO-IHM11M1 low voltage 3-phase

brushless DC motor driver expansion board based on STSPIN230

Introduction

The X-NUCLEO-IHM11M1 is a low voltage three-phase brushless DC motor driver expansion board

based on STSPIN230 for STM32 Nucleo. It is an affordable and easy-to-use solution with motor driver

operation in low voltage battery scenarios, allowing zero consumption state (such as in thermal printers,

robotics, toys, etc..).

The X-NUCLEO-IHM11M1 is compatible with the Arduino UNO R3 and the ST morpho connectors and

supports the addition of other boards to a single STM32 Nucleo board.

Furthermore, the board is designed for six-step and FOC algorithms.

Figure 1: X-NUCLEO-IHM11M1 expansion board

Contents

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Contents

1Hardware and software requirements............................................5

2Getting started.................................................................................6

3Hardware description and configuration.......................................7

3.1 Selecting the STM32 Nucleo board...................................................8

4Circuit description...........................................................................9

4.1 Hall/encoder motor speed sensor .....................................................9

4.2 Sensorless detection.........................................................................9

4.3 Bus voltage circuit.............................................................................9

5Revision history ............................................................................10

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List of tables

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List of tables

Table 1: ST morpho connector table ..........................................................................................................7

Table 2: Other connectors, jumpers and test points...................................................................................8

Table 3: BEFM3 input selection..................................................................................................................9

Table 4: Document revision history ..........................................................................................................10

List of figures

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List of figures

Figure 1: X-NUCLEO-IHM11M1 expansion board ....................................................................................1

Figure 2: X-NUCLEO-IHM11M1 jumper and connector positions.............................................................7

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Hardware and software requirements

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1 Hardware and software requirements

To use the STM32 Nucleo development boards with the X-NUCLEO-IHM11M1 expansion

board, the following software and hardware specifications are required:

a Windows PC (XP, Vista 7 , Win 8, Win 10 ) to install the software package

an X-NUCLEO-IHM11M1 expansion board

an STM32 Nucleo development board (NUCLEO-F401RE, NUCLEO-F334R8,

NUCLEO-F030R8 or NUCLEO-L053R8)

a type A USB to mini-B USB cable to connect the STM32 Nucleo board to the PC

the X-CUBE-SPN7 software package (available on www.st.com)

an IDE chosen among IAR Embedded Workbench for ARM (EWARM), Keil

microcontroller development kit (MDK-ARM) and system workbench for STM32

Nucleo project

three-phase brushless DC motor with compatible voltage and current for STSPIN230

driver

an external power supply or battery able to provide the voltage required by the stepper

motor used

Getting started

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2 Getting started

The X-NUCLEO-IHM11M1 expansion board is a three-phase brushless DC motor driver

covering a wide range of applications.

The board maximum ratings are:

Power stage supply voltage (Vsub) from 1.8 to 10 V

Motor phase current up to 1.3 Arms

To start your project with the board:

1. Check the jumper position of your configuration (see Section 2: "Introduction").

2. Connect the X-NUCLEO-IHM11M1 with the STM32 Nucleo development board

through ST morpho connectors (CN7, CN10).

3. Supply the board through input 5 (Vin) and 6 (GND) of the J1 connector: the D5 (red)

LED turns on.

4. Develop your application using the examples provided with the firmware library.

Further support material is available on the STSPIN230 (www.st.com) and STM32 Nucleo

web pages (www.st.com/stm32nucleo)

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Hardware description and configuration

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3 Hardware description and configuration

The figure below shows the board connector and jumper positions.

Figure 2: X-NUCLEO-IHM11M1 jumper and connector positions

The table below shows ST morpho connector detailed pinout.

Table 1: ST morpho connector table

Connector

Pin(1)

Signal

Remarks

CN10

IO_BEFM

Ground

BEFM3

Section 3: "Hardware and software requirements"

Reset

V_High

U_High

W_Low

BEFM3

Section 3: "Hardware and software requirements"

Fault

V_Low

Enable

U_Low

Hardware description and configuration

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Connector

Pin(1)

Signal

Remarks

W_High

CN7

VDD

Ground

CURR_FDB

VBUS

BEFM2

Speed

BEFM1

Notes:

(1)All the non-listed pins are not connected.

The X-NUCLEO-IHM11M1 is equipped with screw connectors for motor and power supply,

a jumper for enabling a Hall encoder detection circuit and a connector for Hall effect

sensors (refer to the table below).

Table 2: Other connectors, jumpers and test points

Name

Label

Description

1 - 2

Vin -

GND

Motor power supply

1 - 2 -

U, V, W

3-phase BLDC motor phases connection

1 - 2 -

Hall/encoder sensors connector

4 - 5

Sensors power supply

Selection for Hall’s input lines protection (closed by default) Hall’s

input lines

TP1

GND

Ground

TP2

VIN

Motor power supply

TP3

VDD

Digital power supply (by default 3.3 V coming from STM32 Nucleo

board)

3.1 Selecting the STM32 Nucleo board

This expansion board natively supports the following STM32 Nucleo development boards:

NUCLEO-F401RE

NUCLEO-F334R8

NUCLEO-F030R8

NUCLEO-L053R8

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Circuit description

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4 Circuit description

The STSPIN230 integrates a protected triple half-bridge with low RDS(on) for evaluating a

solution for a three-phase BLDC motor in very low consumption mode.

The device is protected against overload and short-circuits: short to ground, short to motor

supply voltage, short between the outputs. If one of the failure events occurs, the fault

signal is set and the fault LED D5 is lit (red).

The STSPIN230 is compatible with single shunt current sense measurement. The current

feedback signal conditioning is performed by hardware available on the board and sent to

the STM32 Nucleo board through the CN7 ST morpho connector (pin 28).

Motor speed regulation can be performed by hardware, by acting on trimmer R12. In this

way, you can change the reference used by STM32 firmware for speed regulation.

The X-NUCLEO-IHM11M1 expansion board provides two hardware solutions for motor

position feedback: one based on sensors and the other one based on sensorless detection.

4.1 Hall/encoder motor speed sensor

The X-NUCLEO-IHM11M1 expansion board implements the Hall/encoder sensor detection

circuit for motor speed feedback. The motor sensor feedback is connected through the J3

connector and an analog circuit to the STM32 Nucleo board in order to detect the motor

rotation.

For sensors requiring external pull-up, three 10 kΩ resistors are already mounted and

connected to the VDD voltage (if these are not necessary, you can remove them).

The J4 jumper (closed by default) protects the Hall’s input lines connecting them to VDD

voltage through a small-signal Schottky diode.

4.2 Sensorless detection

In six-step driving mode, one of the three phases is left in high impedance state: comparing

this phase voltage with the center-tap voltage, we can detect the BEMF zero-crossing.

This signal is acquired through an analog circuit embedded on the expansion board and

sent to the STM32 Nucleo board through the ST morpho connectors.

For each different STM32 Nucleo development board, the BEFM3 driver input can be

selected through a dedicated resistor, as indicated in the table below.

Table 3: BEFM3 input selection

Nucleo board

CN10 connector

R15

R16

Remark

NUCLEO-F401RE

NUCLEO-F030R8

NUCLEO-L053R8

pin15

0 Ω

Not mounted

Default

NUCLEO-F334R8

pin 26

Not mounted

0 Ω

4.3 Bus voltage circuit

The X-NUCLEO-IHM11M1 expansion board provides the hardware bus voltage sensing.

This signal is acquired with a resistor divider from the motor supply voltage (VBUS) and

sent to the analog to digital converter (connector CN7 pin 30).

Revision history

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5 Revision history

Table 4: Document revision history

Date

Revision

Changes

19-Jul-2016

Initial release.

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