EPC EPC9147C User manual
QUICK START GUIDE EPC9147C Motor Drive Controller Interface Board
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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
}
}
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 ocial 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 amplier 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 Specications
Table 2: Compatible eGaN FET/IC motor driver inverters to the EPC9147C
Motor Drive Inverter Board Number Basic Specications 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 Specications (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 ocial 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 ocial 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 specic motors:
https://epc-co.com/epc/Products/DemoBoards/EPC9147c.aspx
The demo program is set to drive a specic motor: Teknic M-3411P-LN-08D.
If a dierent 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 specic EPC project relevant to
the specic 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 specic 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
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If this is the rst time that the STM32CubeIDE project le is opened, an Operation completed dialog box will appear once the installation is completed.
Click OK. Note: If the project was already imported the following dialog will not appear and the program will open.
Connect the USB cable to the ST Nucleo board on the EPC9147C.
Highlight the project (1) in the STM32CubeIDE program and click the Debug (2) button as in Figure 17. The entire Compilation, link and ash of the
project in the STM32 ash will start (a dialog box may appear, in that case click OK). When the process is nished, the Compiler will enter in Debug mode.
Click the Terminate button as in Figure 18 and disconnect the USB cable. The STM32CubeIDE program can be closed.
The ST Nucleo Board in the EPC9147C is now ready to run the motor and you can follow the steps described in the quick start procedure paragraph.
Figure 17: Compile, Build and Flash
Figure 18: Debugger terminate button
Figure 19: ST Motor Control Workbench Open Monitor button
Figure 16: Import the .project in the STM32CubeIDE Workspace
ST Motor Control Workbench – Advanced Use
When the ST Nucleo board is properly programmed and connected via
the EPC9147C to the proper power board, it is also possible to use the ST
Motor Control Workbench GUI to change the speed and the direction of
the motor.
Open the ST Motor Control Workbench and load the proper .stmcx
le that is relevant to the project you are working at (e.g. G431-EPC9145-
DummyNema34_50k_100n.stmcx).
Click on the Open Monitor button.
1
2
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Connect the USB cable to the PC and power up the 48 V to the power board.
Click on the Connect button.
Click Fault Ack (1) button if any fault was detected. Then click Start Motor (2). Motor should spin. It is now possible to move the graphic potentiometer
on the GUI to change the speed of the motor and to change the motor direction. Refer to ST user guide manual for more details on how to work with
the ST Motor Control Workbench for further customization.
Wait for the successful connection message (Figure 21).
Figure 20: Connect button
Figure 21: Device successfully connected message
Figure 22: GUI with speed potentiometer. Note the yellow LED “Fault over” (3). Fault Ack (1) must be clicked before starting the motor.
1
2
3
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Table 5: Bill of Materials
Item Qty Reference Part Description Manufacturer Part #
1 1 C1 CAP CER 0.1 μF 16 V X7R 0603 AVX 0603YC104KAT2A
2 3 C2, C3, C4 CAP CER 0.1 μF 16 V X7R 0603 AVX 0603YC104KAT2A
3 1 D1 LED RED CLEAR CHIP SMD Lite-On LTST-C193KRKT-5A
4 3 J1, J6, J7 TE 4-103185-0-02
5 1 J2 TE 87227-4
6 1 J3 Sullins SBH11-PBPC-D17-ST-BK
7 1 J5 Sullins SFH11-PBPC-D17-ST-BK
8 2 J11, J12 Header Male&Female 100 mil 2 row, 19 pos. thru Vert. Polarized Samtec ESQ-119-24-T-D
9 1 P1 TRIMMER 1 k Ω 0.5 W Horz TOP Vishay M63P103KB30T607
10 1R1 RES SMD 1 K Ω 0.1% 1/10W 0603 Yageo RT0603BRD071KL
11 38
R2, R3, R4, R6, R7, R8, R13, R15,
R19, R20, R22, R30, R32, R38,
R39, R40, R41, R44, R45, R48,
R49, R56, R60, R61, R64, R68,
R69, R72, R84, R86, R88, R89,
R92, R93, R96, R100, R104, R108
RES 20 K Ω 0.1% 1/10 W 0603, RES SMD 0 Ω JUMPER 1/10 W 0603 Stackpole,
Panasonic
RNCF0603BTE20K0,
ERJ-3GEY0R00V
12 74
R5, R9, R10, R11, R12, R14, R16,
R17, R18, R21, R23, R24, R25,
R26, R27, R28, R29, R31, R33,
R34, R35, R36, R37, R42, R43,
R46, R47, R50, R51, R52, R53,
R54, R55, R57, R58, R59, R62,
R63, R65, R66, R67, R70, R71,
R73, R74, R75, R76, R77, R78,
R79, R80, R81, R82, R83, R85,
R87, R90, R91, R94, R95, R97,
R98, R99, R101, R102, R103,
R105, R106, R107, R109, R110,
R111, R112, R113
RES SMD 0 Ω JUMPER 1/10 W 0603 Panasonic ERJ-3GEY0R00V
13 4SO1, SO2, SO3, SO4 8834 Nylon Stando Keystone 8834
Table 6: Optional Components
Item Qty Reference Part Description Manufacturer Part #
1 3 J8, J9, J10 Jumper 2 pin 50 mil Harwin M50-203005
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FD1
PCB Fiducial
FD2
PCB Fiducial
FD3
PCB Fiducial
Motor Drive Interface Connector
PWMH1
PWML1
PWMH2
PWML2
PWMH3
PWML3
Isns1
Isns2
Isns3
ST_EncA
ST_EncB ST_EncI
Vdc
Tsns
ICL shutout
5 V
PFC_SYNC
PFC_PWM
PFC_iL
PFC_shutdown
PFC_V ac
PFC_SYNC
PFC_PWM
PFC_iL
5 V
GNDA
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
J3
EMPTY
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
J5
1 2
3
5
7
4
6
8
J2
PFC_shutdown
ICL shutout
PFC_V ac
1 2
3 4
5 6
7 8
9 10
11 12
13 14
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
J4
PWMH1
PWML1
PWMH2
PWMH3
PWML2
PWML3
EncA
EncB
EncI
Vdc
Vsns1
Vsns2
Vsns3
Isns1
Isns2
Isns3
Tsns
OCPn
GNDA
3V3_PB
Controller connection - ribbon cable
Controller connection - direct
EncA/B/I = shaft encoder (Default)
Vsns1/2/3 = phase voltage
Extra Functions
Sensor function
1
2
J6
3.3 V power option
3V3
GND
GND
GND
3V3
1
2
J7
3.3 V supply from motor drive board (Default)
3V3 3V3_PB
GND
3.3 V external supply (optional)
External3.3 V
1
2
3
J8
ST_EncA
EncA Vsns1
1
2
3
J9
ST_EncB
EncB Vsns2
1
2
3
J10
Vsns3EncI
ST_EncI
Jumper 50 mil Red with handle
JP8
Jumper 50 mil Red with handle
JP9
Jumper 50 mil Red with handle
JP10
100 mil Jumper Black
JP2
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35
37
36
38
100mil TH Male-Female
J11
ESQ-119-24-T-D
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35
37
36
38
100 mil TH Male-Female
J12
ESQ-119-24-T-D
PWMH1
PWML1
PWMH2
PWML2
PWMH3
PWML3
Isns1
Isns2
Isns3
Vdc
Tsns
5 V
LTST-C193KRKT-5A
0603 Red
D1
GND
PB2
PB2
Nucleo Board Connection
GND
GNDA
CW
M63P
10 k 0.5 W
P1
3V3
GND
0603
0 Ω 0.1 W
R5
Speed
Speed
CN7 equivalent - on bottom
CN10 equivalent - on top
1
2
J1
5 V
GND
External 5 V
0 Ω 0.1 WR3EMPTY
0 Ω 0.1 WR6EMPTY
0 Ω 0.1 WR8EMPTY
0 Ω 0.1 WR10
0 Ω 0.1 WR12
0 Ω 0.1 WR14
0 Ω 0.1 WR16
0 Ω 0.1 WR18
0 Ω 0.1 WR20EMPTY
0 Ω 0.1 WR22EMPTY
0 Ω 0.1 WR24
0 Ω 0.1 WR26
0 Ω 0.1 WR28
0 Ω 0.1 WR30EMPTY
0 Ω 0.1 WR32EMPTY
0 Ω 0.1 WR34
0 Ω 0.1 WR36
0 Ω 0.1 WR38EMPTY
0 Ω 0.1 WR4 EMPTY
0 Ω 0.1 WR7 EMPTY
0 Ω 0.1 WR9
0 Ω 0.1 WR11
0 Ω 0.1 WR13 EMPTY
0 Ω 0.1 WR15 EMPTY
0 Ω 0.1 WR17
0 Ω 0.1 WR19 EMPTY
0 Ω 0.1 WR21
0 Ω 0.1 WR23
0 Ω 0.1 WR25
0 Ω 0.1 WR27
0 Ω 0.1 WR29
0 Ω 0.1 WR31
0 Ω 0.1 WR33
0 Ω 0.1 WR35
0 Ω 0.1 WR37
0 Ω 0.1 WR39 EMPTY
0 Ω 0.1 WR40EMPTY 0 Ω 0.1 WR41 EMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 W
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 WEMPTY
0 Ω 0.1 W10
0 Ω 0.1 W
R44
R48
R52
R56
R60
R64
R68
R72
R76
R80
R84
R88
R92
R96
R100
R104
R108
R1
R112
0 Ω 0.1 W EMPTY
0 Ω 0.1 W EMPTY
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 W EMPTY
0 Ω 0.1 W
0 Ω 0.1 W EMPTY
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 W EMPTY
0 Ω 0.1 W EMPTY
0 Ω 0.1 WR97
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 W
0 Ω 0.1 WR111
0 Ω 0.1 WR113
0 Ω 0.1 WR42
0 Ω 0.1 WR46
0 Ω 0.1 WR50
0 Ω 0.1 WR54
0 Ω 0.1 WR58
0 Ω 0.1 WR62
0 Ω 0.1 WR66
0 Ω 0.1 WR70
0 Ω 0.1 WR74
0 Ω 0.1 WR78
0 Ω 0.1 WR82
0 Ω 0.1 WR86EMPTY
0 Ω 0.1 WR90
0 Ω 0.1 WR94
0 Ω 0.1 WR98
0 Ω 0.1 WR102
0 Ω 0.1 WR106
0 Ω 0.1 WR43
0 Ω 0.1 WR47
0 Ω 0.1 WR51
0 Ω 0.1 WR55
0 Ω 0.1 WR59
0 Ω 0.1 WR63
0 Ω 0.1 WR67
0 Ω 0.1 WR71
0 Ω 0.1 WR75
0 Ω 0.1 WR79
0 Ω 0.1 WR83
0 Ω 0.1 WR87
0 Ω 0.1 WR91
0 Ω 0.1 WR95
0 Ω 0.1 WR99
0 Ω 0.1 WR103
0 Ω 0.1 WR107
J3-1
J3-33
J3-3
J3-5
J3-7
J3-9
J3-11
J3-13
J3-15
J3-17
J3-19
J3-21
J3-23
J3-25
J3-27
J3-29
J3-31
J3-1
J3-33
J3-3
J3-5
J3-7
J3-9
J3-11
J3-13
J3-15
J3-17
J3-19
J3-21
J3-23
J3-25
J3-27
J3-29
J3-31
J3-2
J3-34
J3-4
J3-6
J3-8
J3-10
J3-12
J3-14
J3-16
J3-18
J3-20
J3-22
J3-24
J3-26
J3-28
J3-30
J3-32
J3-2
J3-34
J3-4
J3-6
J3-8
J3-10
J3-12
J3-14
J3-16
J3-18
J3-20
J3-22
J3-24
J3-26
J3-28
J3-30
J3-32
PWML1
OCPn
OCPn OCPn
OCPn
0603
100 nF 16 V
C1
GND
OCPn
3V3
EncA
EncB
EncI
Vsns1
Vsns2
Vsns2
Vsns3
Vsns3
Vsns3
3V3
3V3
5 V
3V3
GND
GND
3V3
GND
5V
GND
0603
20 k 0.1 W
R2
EMPTY
0603
100 nF 16 V
C2
EMPTY
0603
100 nF 16 V
C3
EMPTY
0603
100 nF 16 V
C4
EMPTY
GNDA GNDA GNDA
R45
R49
R53
R57
R61
R65
R69
R73
R77
R81
R85
R89
R93
R101
R105
R109
If1
If2
If3
If1 If2 If3
0603
1 k 0.1 W
R1
8834
SO1
8834
SO2
8834
SO3
8834
SO4
1PP1
1PP2
1PP3
1PP4
1PP5
1PP6
1PP7
1PP8
1PP9
1PP10
1PP11
1PP12
1PP13
1PP14
1PP15
1PP16
1PP17
1
PP18
1
PP21
1
PP19
1
PP20
1
PP22
1
PP23
1
PP24
Speed potentiometer
PB2 Signal
Board Standos
ATTENTION
ELECTROSTATIC
SENSITIVE DEVICE
Figure 23: EPC9147C Main schematic
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Demonstration Board Notication
The EPC9147C board is intended for product evaluation purposes only. It is not intended for commercial use nor is it FCC approved for resale. Replace components on
the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Quick Start Guide. Contact an authorized EPC representative with any questions.This board is
intended to be used by certied professionals, in a lab environment, following proper safety procedures. Use at your own risk.
As an evaluation tool, this board is not designed for compliance with the European Union directive on electromagnetic compatibility or any other such directives or regulations. As board
buildsareat times subjectto product availability,it is possiblethatboardsmaycontaincomponentsor assembly materials that are not RoHScompliant.EcientPowerConversionCorpora-
tion (EPC) makes no guarantee that the purchased board is 100% RoHS compliant.
The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this Quick Start Guide constitute a sales contract or create any kind of warranty, whether express
or implied, as to the applications or products involved.
Disclaimer: EPC reserves theright at anytime, without notice, tomake changes toany products described herein toimprove reliability, function, or design.EPC does not assume any liability
arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, or other intellectual property whatsoever, nor the
rights of others.
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