EPC EPC9147C User manual

Revision 2.2
Development Board
EPC9147C
Quick Start Guide
Motor Drive Controller Interface Board –
STMicroelectronics STM32 Nucleo

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DESCRIPTION
The EPC9147C board is an interface board that
accepts the STMicroelectronics STM32 NUCLEO-
G431RB motor drive development board, that
is tted with the STM32G431RBT6 ARM Digital
Controller, and interfaces to a 3-phase eGaN® FET/
IC motor drive inverter board. This interface board
allowsuserstoutilizetheexistingSTMicroelectronics
Integrated Development Environment resources to
program the controller board that controls a motor
powered by an eGaN FET/IC 3-phase inverter using
sensor-less eld oriented control with space vector
pulse width modulation.
Figure 1 shows an overview of the EPC9147C board
detailing connections and various human interfaces
that measures 120 mm x 71 mm (L x W).
Figure 1: Overview of the EPC9147C board
EPC9147C development board
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Expansion Port
Test points
Nucleo board interface Ext. 5 V
Ext. 3.3 V
34-pin
connection
interface
3.3 V source
Speed adjust
knob
PB2 LED 2
Monitoring
jumper settings
Motor Drive
connection
(a)
(b)

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The EPC9147C includes a standard STMicroelectronics STM32 NUCLEO-G431RB motor drive development board compatible connector (J11 & J12) that
interfaces the PWM, analog feedback signal, errors states and 3.3 V power to the motor drive inverter board as shown in gure 2.
Communications
EPC9147C board
Nucleo board
BLDC
motor
3-Phase
Inverter
Figure 2: Application overview of the EPC9147C control interface board
HUMAN INTERFACE CONTROLS AND INDICATORS
The EPC9147C has a human interface controls and indicators as shown in gure 1.
To operate the motor the following controls are available:
• Black button on ST Nucleo board – press this button once after the power supply is set to prepare for motor run.
• Blue button on ST Nucleo board – press this button once to start the motor and press it again to stop the motor.
• Speed potentiometer on EPC9147C – This knob can be used to change the motor speed. By default, the potentiometer is not interfaced in original ST
rmware, so it is up to the customer to modify the ST rmware to interface the potentiometer to use it as target speed setting analog interface.
There are LED indicators that provide information on the status of the controller:
On Nucleo board:
• Power LED (green) – The Nucleo board has power. Power is provided by the motor drive inverter, through the EPC9147C board.
• Status LED (red) – when it is ashing, the Nucleo board is ready for operation. After power up, press the black button at least once. The blue button is
used for starting and stopping the motor.
On EPC9147C board
• PB2 signal status (red). This LED is not used by the ocial ST rmware. The user may re-program and customize the Nucleo board rmware and provide
driving for this LED.
Warning: The human interface controls and knob, as well as the entire EPC9147C, and the ST Nucleo board are not isolated. The EPC9147C is
referenced to Power Ground and extreme caution must be observed when operating the board at high voltage.

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Table 1: Monitoring jumper settings mapping
Jumper Phase Position 1-2 (default) Position 2-3
J8 1 Shaft Encoder A Motor Phase Voltage 1
J9 2 Shaft Encoder B Motor Phase Voltage 2
J10 3 Shaft Encoder Index Motor Phase Voltage 3
Test Points
Several test-points are available for measurement of various analog, error and PWM signals. Analog signals include voltage and current readings, input
DC voltage to the drive, and current sense amplier voltage reference. The operator is encouraged to read the motor drive inverter drive QSG carefully to
determine the correct scaling factors. The locations of the test points are shown in gure 1(b).
Monitoring Jumper Settings
The EPC9147C is provided with a set of jumpers that can be used to change the monitoring connections. Table 1 provides a detailed list of the settings
mapping and gure 3 shows this graphically.
Internal/External 3.3 V Power Jumper Setting
The EPC9147C is provided with a jumper (J7) that, when it is mounted (by default), allows the 3.3 V power supply to be fed by the Power Board. If Jumper
J7 is not mounted, the EPC9147C 3.3 V (and the ST Nucleo 3.3V) power must be supplied by an external 3.3 V power supply connected to the connector J6.
Any combination of valid position settings may be selected.
Figure 3: Monitoring jumper settings (a) shaft encoder (default), (b) phases voltage
(a) (b)

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Compatible Motor Drive Inverters
A list of motor drive inverter power boards compatible to the EPC9147C is given in table 2.
EPC9147C Electrical Specications
Table 2: Compatible eGaN FET/IC motor driver inverters to the EPC9147C
Motor Drive Inverter Board Number Basic Specications Web Link
EPC9146 Rev. 2.1 400 W, 3-phase BLDC Inverter using EPC2152 EPC9146 – 400 W Motor drive demo board
EPC9145 Rev. 1.1 1000 W, 3-phase BLDC Inverter using EPC2206 EPC9145 – 1000 W Motor drive demo board
Table 3: Electrical Specications (TA= 25°C) EPC9147C
Symbol Parameter Conditions Min Nominal Max Units
V3.3EXT External 3.3 V Operating voltage J7 is not mounted 3.1 3.3 3.5 V
V5VEXT External 5 V straight to ST board connector 4.9 5.0 5.1 V
Table 4: Motor interface connection (J2) pin allocation map
Pin # Pin Name Pin #
2 PWMH1 GND 1
4 PWML1 GND 3
6 PWMH2 GND 5
8 PWML2 GND 7
10 PWMH3 3V3 9
12 PWML3 3V3 11
14 EncA 3V3 13
Index
18 EncB GND 17
20 EncI GND 19
22 Vin GND 21
24 V1 GND 23
26 V2 GND 25
28 V3 GND 27
30 Iin GND 29
32 I1 GND 31
34 I2 GND 33
36 I3 GND 35
38 EN/Pgood LEDerr 37
40 Tsns LEDact 39
CONNECTION DETAILS
Inverter
A 40 pin connector is used to interface power, PWM signals and analog
feedback signals between the interface board and the motor drive
inverter. Table 4 gives the map (J2) for each signal
PROGRAMMING
The ST Nucleo board that is connected to the EPC9147C board provides
a full programmer and debugger onboard. The user can program the
ST Nucleo board by using a USB cable connected to connector CN1 to
the ST Nucleo board and by using ocial ST integrated development
environment.
More details on the ST environment can be found at this page:
https://www.st.com/ content/st_com/en/ecosystems/stm32-motor-
control-ecosystem.html
The ow, as described by ST, can be depicted in Figure 4.
Figure 4 - ST motor control development programs

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PROGRAMMING WITH .elf FILE
The ST Nucleo board comes with an onboard programmer debugger. Connect the CN1 connector to a USB port of your computer and use the STM32
CubeProgrammer software. The CN1 connector requires a Micro B USB male cable. The STM32CubeProgrammer software can be downloaded from
ST’s’ website, after registration, at this link: https://www.st.com/en/development-tools/stm32cubeprog.html
Verify that the jumpers CN11 and CN12 in ST Nucleo board are mounted and that the selector on the 5V_SEL is set on 5V_STLK position. Start the
STM32CubeProgrammer, click on Connect button by making sure that the ST-LINK option is chosen.
Once connected, click on the Open File tab and choose the proper .elf le to be programmed on the board. The original demo .elf le can be
downloaded from EPC website on the EPC9147C web page.
Click on the lename tab to bring it in front, so that it is fully visible. Right-click on the lename tab and choose the Download option. This will
program the ST Nucleo ash memory. Once programming is done, it is possible to verify the Flash memory content if needed.
Figure 5: STM32CubeProgrammer
Figure 6: Open le tab
Figure 7: Open .elf le and download it to the ash memory
Filename tab

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EXTRA FUNCTION PORT
The EPC9147C is provided with an extra function port (J2) that can be
used to expand functionality to the board. Table 6 provides the pin
allocation map for the expansion port. The usage of the expansion port
depends on ocial ST rmware. In the demo provided by EPC, these
functions are not used.
QUICK START PROCEDURE
Please check EPC’s EPC9147C product page for updates on compatible
eGaN FET/IC inverters with reference settings for specic motors:
https://epc-co.com/epc/Products/DemoBoards/EPC9147c.aspx
The demo program is set to drive a specic motor: Teknic M-3411P-LN-08D.
If a dierent motor needs to be used, please follow these steps:
1. Verify that the ST Nucleo G431RB is properly mounted on the EPC9147C
as shown in Figure 2.
2. Verify that on ST Nucleo board, CN11, CN12, JP6, and JP3 jumpers are
mounted. JP8 must be in position 2-3, 5V_SEL must be in 5V_STLK
position, and JP1 and JP7 are not mounted.
3. Connect the motor Teknic M-3411P-LN-08D to the power board. Only
the three phase wires of the motor are needed, because the rmware
is sensor-less.
4. Connect 48 V 3.0 A power supply to the power board connected to the
EPC9147C.
5. Power up the 48 V power supply.
6. Press the black button once.
7. Press the blue button once. Motor start spinning at a xed speed.
8. Press the blue button once again. Motor Stops.
Warning: The human interface controls and knob, as well as the
entire EPC9147C, and the ST Nucleo board are not isolated. The
EPC9147C is referenced to Power Ground and extreme caution must
be observed when operating the board at high voltage.
Table 6: Extra Function port (J2) pin allocation map
Pin # Connector
15 V
2 GND
3 PFC shutdown
4 PFC iL
5 ICL shutout
6 PFC PWM
7PFC Vac
8 PFC Synce
MOTOR COMMISSIONING PROCEDURE
To commission a new motor, the user must install the entire development
suite from ST website after registration.
Download and install the following programs:
ST Motor Control Workbench:
https://www.st.com/content/st_com/en/products/embedded-
software/mcu-mpu-embedded-software/stm32-embedded-software/
stm32cube-expansion-packages/x-cube-mcsdk.html
STM32CubeMX
https://www.st.com/en/development-tools/stm32cubemx.html
STM32CubeIDE
https://www.st.com/en/development-tools/stm32cubeide.html
For your reference, the page about the ST Nucleo G431RB is at this link:
https://www.st.com/en/evaluation-tools/nucleo-g431rb.html#tools-
software
Once the software is properly installed, the user must follow this procedure:
1. Use the Motor Control Workbench with specic EPC project relevant to
the specic EPC power board being used
2. Modify the motor parameters to adapt the system to the desired motor
3. Generate the code
4. Use STM32CubeIDE to compile, link, and ash the generated .elf le to
the ST Nucleo board

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ST MOTOR CONTROL WORKBENCH
Download from EPC power board web page the proper .zip archive that contains the ST Motor Control Workbench project. Unzip the archive
by placing the .stmcx le and the contained directory in a folder in your computer. E.g., for EPC9145 power board, the project le name is G431-
EPC9145-DummyNema34_50k_100n.zip, and it contains a le G431-EPC9145-DummyNema34_50k_100n.stmcx and a directory named G431-
EPC9145-DummyNema34_50k_100n. Save these in a specic location folder in your computer, then start the ST Motor Control Workbench program.
Click on Load Project button (Figure 8) and choose the G431-EPC9145-DummyNema34_50k_100n.stmcx le. The architecture will be then shown
in the program as in Figure 9.
On the Motor tab, ll in the Electrical parameters and click the Done button: Next, click on the Generation arrow button:
Figure 8: ST Motor Control Workbench Load Project button
Figure 10: Motor Parameters
Figure 11: ST Motor Control Workbench Generate Code button
Figure 9: ST Motor Control Workbench
Double click on the motor symbol.

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Project generation dialog box will appear. Verify it matches Figure 12’s settings and then click Generate.
Once the Generation is complete, click Open Folder button and then click the Close button.
Figure 12: STM32CubeMX Code Generation dialog box
Figure 13: STM32CubeMX Code successfully generated

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Intheexplorerwindowwhere the generated code folder isshown,asinFigure14, openthefolder namedSTM32CubeIDE.
Figure 14: Generated code folder
Inside the STM32CubeIDE folder, double click the .project le.
Figure 15: STM32CubeIDE project directory