STMicroelectronics STEVAL-CTM011V1 Evaluation Board for 250 W Mainstream Compressors User Manual

: June 4, 2024
: STMicroelectronics

UM2962

User manual

Getting started with the STEVAL-CTM011V1 evaluation board for 250 W mainstream compressors

Introduction

The STEVAL-CTM011V1 is a three-phase inverter based on the STSPIN32F0601Q controller, which embeds a 3-phase 600 V gate driver and an Arm® Cortex®-M0 STM32 MCU. The power stage features STGD5H60DF IGBTs.
The board supports one-shunt and two- plus one-shunt sensing topology. You can properly set the shunt topology by populating the related shunt resistors (RS1, RS2, and RS3).
Moreover, you can implement a sensorless field-oriented control (FOC). This allows driving permanent magnet synchronous motors (PMSMs) and brushless DC (BLDC) motors to cover a wide range of applications, such as refrigerator compressors, pumps, fans, and industrial appliances.
The STEVAL-CTM011V1 evaluation board is compatible with a wide range of input voltages. It includes a power supply stage with the VIPER122 in buck configuration that generates +15 V and +3.3 V supply voltages required by the application.
The companion firmware is X-CUBE-MCSDK, available for download on www.st.com, to be used with the STSW- CTM011 firmware example for compressor motors.
You can compile, debug, and configure the firmware through the STM32CubeIDE and B-STLINK-ISOL plus STLINK- V3SET.
SWD and UART TX-RX connectors are also available.

Figure 1. STEVAL-CTM011V1 evaluation board

STEVAL-CTM011V1 - Figure 1

UM2962 – Rev 3 – May 2022 www.st.com
For further information contact your local STMicroelectronics sales office.

1 Getting started

1.1 Safety and operating instructions

1.1.1 General terms

STEVAL-CTM011V1 - LINE 3

Warning: During assembly, testing, and normal operation, the evaluation board poses several inherent hazards, including bare wires, moving or rotating parts, and hot surfaces. There is danger of serious personal injury and damage to property if you improperly use or incorrectly install the board or its components. The board is not electrically isolated from the 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 measuring equipment must be isolated from the mains before powering the board. When using an oscilloscope with the demo, it must be isolated from the AC line. This prevents shock that derives from touching any single point in the circuit, but does not prevent shock when touching two or more points in the circuit.

STEVAL-CTM011V1 - LINE 3

All operations involving transportation, installation, and use, as well as maintenance, have to be carried out by skilled technical personnel (national accident prevention rules must be observed). For the purpose of these basic safety instructions, “skilled technical personnel” are considered as suitably qualified people who are familiar with the installation, use, and maintenance of power electronic systems.

1.1.2 Intended use of the board

The STEVAL-CTM011V1 evaluation board is designed for evaluation purposes only and must not be used for electrical installations or machinery.
The documentation details technical data and information about the power supply conditions that have to be strictly observed.

1.1.3 Evaluation board installation

The installation and cooling of the evaluation board must be in accordance with the specifications and target applications.
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 board contains electrostatically sensitive components that are prone to damage if used incorrectly. Do not mechanically damage or destroy the electrical components (potential health risks).

1.1.4 Evaluation board operation

Note: Do not touch the evaluation board after it has been disconnected from the voltage supply as several parts and power terminals containing potentially energized capacitors need time to discharge.
A system architecture that supplies power to the STEVAL- CTM011V1 evaluation board must be equipped with additional control and protective devices in accordance with the applicable safety requirements (that is, compliance with technical equipment and accident prevention rules).

Caution: Follow the safety recommendations to operate the board. Use proper PPE, such as protective shields and glasses to avoid injuries due to malfunctions.

1.2 Features

Complete system solution made by ready-to-use hardware and firmware
Fitting wide range of applications supplied from the mains, rated up to 250 W:
- refrigerator compressors
– pumps and fans
– industrial appliances
Very low stand-by power consumption and overcurrent/undervoltage protections
Based on STSPIN32F0601Q intelligent 3-phase motor controller with embedded STM32
Power supply based on VIPER122 in buck configuration to generate on-board DC voltages
Inverter power stage based on STGD5H60DF IGBT rated 600 V and 5 A
Compact size: 7.5 x 11.2 cm
Equipped with proven sensorless field-oriented control (FOC) firmware in one-shunt or 2+1 shunt topology
RoHS compliant

1.3 Target applications

Three-phase motor drivers
Fans
Pumps
Refrigerator compressors
Industrial appliances
Inverters

2 Hardware and software requirements

To use the STEVAL-CTM011V1 evaluation board, you need the following software and hardware:

a Windows PC (XP, Vista, Win 7, Win 8, or Win 10) to install the software package;
B-STLINK-ISOL plus STLINK-V3SET;
an isolated USB-to-UART wire to connect the board to the PC (optional);
X-CUBE-MCSDK (v5.3 or later);
STM32CubeMX (v4.24.0 or later);
a three-phase brushless PMSM DC motor with compatible voltage and current ratings;
AC mains power supply or external DC power supply
any of the supported IDEs:
– IAR Embedded Workbench® for Arm® (v7.80.4)
– Keil® MDK tools (v5.24.2 or later)
– Ac6 System Workbench (v2.3.0 or later)
– STM32CubeIDE

3 Hardware description and configuration

3.1 Board components

The figures below show the position of the main circuitry blocks of the board.

Figure 2. STEVAL-CTM011V1 main components (top view)

STEVAL-CTM011V1 - Figure 2

Figure 3. STEVAL-CTM011V1 main components (bottom view)

STEVAL-CTM011V1 - Figure 3

3.2 Shunt resistor configuration

You can configure the shunt resistors according to the desired operation:

SR1 = 0 Ω and SR2 = 0 Ω to operate in single shunt mode set by SR3 value = 0.1 ohm (default configuration);
two-shunt plus one-shunt mode by setting:
– SR1 and SR2 to the desired value (that is SR1=0.1 Ω and SR2= 0.1 Ω);
– SR1: shunt for U phase current sensing;
– SR2: shunt for V phase current sensing;
– SR3: shunt for overcurrent protection.

Figure 4. STEVAL-CTM011V1 – shunt configuration

STEVAL-CTM011V1 - Figure 4

3.3 Overcurrent detection and current-sensing measurement

The STEVAL-CTM011V1 evaluation board implements overcurrent protection based on the STSPIN32F0601Q integrated comparator.
The SR3 shunt resistor measures the load current that brings the voltage signal to the CIN pin. When the phase peak current exceeds the selected threshold, the integrated comparator is triggered and all the power switches are disabled. Power switches are enabled again when the current falls below the threshold and the output
disable time expires, thus implementing a current limitation control.
By default, the evaluation board has an overcurrent threshold set to IOC_typ = 4.6 A and a restart time after fault detection of ~28 µs. You can change these values by changing SR3, C18, and R14.

3.4 Bus voltage circuit

The STEVAL-CTM011V1 evaluation board features bus voltage sensing.
You can set this signal through a voltage divider from the motor supply voltage (VBUS – R65, R66, and R5) and send it to the PA0 GPIO (ADC channel 0) of the embedded MCU. The input voltage is then downsized of a 200x factor.

4 Firmware debug

The “STEVAL-CTM01xV1 1shunt_FOC” folder contains a reference firmware generated for IAR v8.5. It works on the evaluation board with one shunt resistor (default configuration).
You can download the firmware through the SWD port as described in 5.
You can also generate the firmware and download it on the MCU through the SWD port.
The diagram below shows the workflow of the firmware generation and application debug process.

Figure 5. STEVAL-CTM011V1 – X-CUBE-MCSDK workflow

STEVAL-CTM011V1 - Figure 5

To generate the firmware by using X-CUBE- MCSDK, follow the procedure below.

Note: In this example, we use X-CUBE- MCSDK version 5.4.4, but you can use later versions, too.

Step 1. Launch X-CUBE-MCSDK.
Step 2. To start with an environment already set for the evaluation board, load the configuration file provided with the firmware package, named “STEVAL-CTM01xV1 1shunt_FOC.stmcx”.
Step 2a. Choose [Load Project] and select the file.
Step 2b. Alternatively, create a new project by selecting [New Project] >[Inverter]>[Custom board] and follow the next steps.
Step 3. Configure the motor parameters, start-up sequence, and all the relevant parameters according to the target application, as per the user manual in [Documentation] >[‘Getting started with STM32 motor control SDK v5.x’].

Figure 6. X-CUBE-MCSDK configuration options

STEVAL-CTM011V1 - Figure 6

Supply voltage configuration
Supply voltage divider configuration
Motor parameters configuration
Shunt & OpAmp configuration
Overcurrent threshold configuration
Speed feedback configuration
Driving section configuration
ADC configuration
I/O configuration
Startup, driving parameters, protection enabling configuration

Figure 7. X-CUBE-MCSDK configuration example (1 of 2)

STEVAL-CTM011V1 - Figure 7

Figure 8. X-CUBE-MCSDK configuration example (2 of 2)

STEVAL-CTM011V1 - Figure 8

Step 4. Click on the generate icon.
You can then generate the project according to your selected IDE environment.
The X-CUBE-MCSDK motor control workbench calls the STM32CubeMX in background to generate the project frame in the selected IDE.
When the firmware generation starts, a progress window shows that the script is running.
When finished, the tip window appears. The user information table is updated accordingly.

Figure 9. X-CUBE-MCSDK firmware generation

STEVAL-CTM011V1 - Figure 9

Step 5. After project generation, open the project file, compile, and download it onto the STSPIN32F0601Q device.

Figure 10. Project opened in the selected IDE

STEVAL-CTM011V1 - Figure 10

Figure 11. Project compiled

STEVAL-CTM011V1 - Figure 11

5 How to use the board

To start your project with the STEVAL-CTM011V1 evaluation board:
Step 1. Connect the motor to the CON_UVW connector.
Important: Pay attention to the motor phase sequence.
Step 2. Supply the evaluation board through the AC_IN AC mains connector.
Step 3. Develop your application using the STM32 FOC MC library

6 Schematic diagrams

Figure 12. STEVAL-CTM011V1 circuit schematic (1 of 2)

EMI

STEVAL-CTM011V1 - Figure 12 - 1

SMPS

STEVAL-CTM011V1 - Figure 12 - AA

STSPIN32F0601

Figure 13. STEVAL-CTM011V1 circuit schematic (2 of 2)

MOTOR DRIVER

STEVAL-CTM011V1 - Figure 13 - 1 STEVAL-CTM011V1 -
Figure 13 - 2

*Default mode is one shunt solution, with SR1 and SR2 shorted. SR1 and SR2 can be modified to configure the board as 2 shunts solution

7 Bill of materials

Table 1. STEVAL-CTM011V1 bill of materials

Item| Q.ty| Ref.| Part/Value| Description| Manufacturer| Order code
---|---|---|---|---|---|---
1| 8| D1, D6, D7-12| BAT46ZFILM, SOD-123| 100 V, 150 mA SMD general-purpose signal Schottky diode| ST| BAT46ZFILM
2| 1| C17| 0805, 1.2 nF, 50 V, ±10%| Capacitor| Kyocera AVX| 08055C122K4T2A
3| 12| C7, C9, C11, C13, C16, C20, C22-25, C32, C39| 0805, 50 V, ±10%| Capacitors| Wurth Elektronik| 885012207098
4| 3| C8, C36-37| 150 pF, 0805, 50 V, ±10%, C0G/NP0| Ceramic capacitors| Wurth Elektronik| 885012007058
5| 2| C18, C21| 0805, 10 nF, 50 V, ±10%| Capacitors| Wurth Elektronik| 885012207092
6| 1| C12| 1500 pF, 0805, 50 V, C0G/NP0| Ceramic capacitor| Wurth Elektronik| 885012007064
7| 1| C68| 0805, 2.2 nF, 50 V, ±10%| Capacitor| Wurth Elektronik| 885012007065
8| 2| C27, C29| 0805, 20 pF, 50 V, ±5%| Capacitors| KEMET| C0805X200J5GACTU
9| 2| C26, C28| 0805, 33 pF, 50 V, ±5%| Capacitors| Kyocera AVX| 08055C330JAT2A
10| 1| C14| 0805, 470 nF, 50 V, ±10%| Capacitor| Taiyo Yuden| UMK212C7474KGHTE
11| 3| C2-C3, C5| 10 µF, 0805, 25 V| Ceramic capacitors| Taiyo Yuden| TMK212BBJ106KG-T
12| 1| C59| CBB61, 0.1 µF, 630 V, through-hole, P = 15 mm 630 V, ±10%| Capacitor| Panasonic| ECQ-E6104KFA
13| 2| C109-110| CC, Y1, 471, 250 V, through-hole, P = 7.5 mm, 250 VAC, ±10%| Capacitors| Panasonic| ECW-F2474JAB
14| 1| C10| 10 µF, Ø5L11, 50 V, ± 20%| Capacitor| Wurth Elektronik| 860130673001
15| 1| C15| EC, 330 µF, 35 V Ø10L12.5| Capacitor| Wurth Elektronik| 860020575013
16| 1| C6| EC, 330 µF, 450 V Ø30L51| Capacitor| Wurth Elektronik| 861021485026
17| 1| C19| 470 µF, Ø8L122, 35 V, ±20%| Aluminum capacitor| Panasonic| EEU- FR1V471L
18| 2| C1, C4| 0.33 µF, 275 VAC, pitch 15 mm| Film capacitors| Wurth Elektronik| 890324025034CS
19| 1| AC_IN| CON_2PINA, P = 7.92 mm| Connector header| Molex| 0359790210
20| 1| JP3| CON_2PIN_B2B, Through hole,P=2.5mm| Connector header| Samtec| TSW-101-07-F-D
21| 2| SWD UART| CON_4PIN, through hole,P=2.54mm| Header spacer connector| Amphenol| 75970-3BB-04LF
22| 1| TEST| CON_8PIN, through hole,P=2.54mm| Connector header| Amphenol| 78511-408HLF
23| 1| MOTOR| CON_UVW, through hole| Connector header| Molex| 0010634037
24| 1| D4| DIOZ_1N4745A, 16V, 1W, LL-41| Zener diode| Vishay Semiconductor Diodes Division| ZM4745A-GS08
25| 1| BD1| DIO_DB_KBJ608, KBJ| Bridge rectifier| Diodes Incorporated| KBJ608G
26| 1| D3| DIO_LED, 0805| Red LED| Visual Communication s Company – VCC| CMD17-21VRD/TR8
27| 1| F1| FUSE_T3.15A-250 VAC through hole,P=5.08mm 250V| Fuse| Bel Fuse Inc.

8 Board versions

Table 2. STEVAL-CTM011V1 versions

Finished good	Schematic diagrams	Bill of materials
STEVAL$CTM011V1A (1)	[STEVAL$CTM011V1A schematic

diagrams](https://www.st.com/resource/en/schematic_pack/steval- ctm011v1_schematic.pdf)| STEVAL$CTM011V1A bill of materials

This code identifies the STEVAL-CTM011V1 evaluation board first version.

9 References

Revision history

Table 3. Document revision history Changes

Date	Revision	Changes
12-Jan-2022	1	Initial release.
07-Feb-2022	2	Updated Section 1.1.4 Evaluation board operation.
04-May-2022	3	Updated introduction and Section 1.2 Features.

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UM2962 – Rev 3