Texas Instruments DRV8311HEVM User manual

User’s Guide
DRV8311HEVM User's Guide
ABSTRACT
This document is provided with the DRV8311HEVM customer evaluation module (EVM)to evaluate the DRV8311
3-V to 20-V Three-Phase Smart Gate Driver. This User's Guide details the implementation of the EVM and
shows how to set up and power the board with the LAUNCHXL-F280049C (C2000 Piccolo MCU F280049C
LaunchPad™ development kit).
Note
The DRV8311HEVM comes automatically populated with and configured for the DRV8311H hardware
device. It is also compatible for the DRV8311S and DRV8311P variants, but the user will need to
modify the board to make it compatible for the SPI/tSPI devices (see Section 4.4).
Note
For the DRV8311H Hardware settings to work, R7 must be removed and 3.3 V must be supplied
externally or from the LaunchPad. Please see section DRV8311H Compatability.
Table of Contents
1 Cautions and Warnings..........................................................................................................................................................2
2 Introduction.............................................................................................................................................................................3
3 Quick Start Guide....................................................................................................................................................................5
4 Hardware and Software Overview.........................................................................................................................................6
4.1 Hardware Connections Overview – DRV8311HEVM + LAUNCHXL-F280049C................................................................6
4.2 Connection Details............................................................................................................................................................. 6
4.3 LED Lights..........................................................................................................................................................................8
4.4 DRV8311HEVM Configurability – Jumpers and Resistors................................................................................................. 9
5 Hardware Setup.................................................................................................................................................................... 15
6 Firmware and GUI Application.............................................................................................................................................16
6.1 C2000 InstaSPIN Universal GUI...................................................................................................................................... 16
6.2 Motor Identification...........................................................................................................................................................17
6.3 Sensorless-FOC Commutation........................................................................................................................................ 18
6.4 Torque Control, Speed Control, and Advanced Modulation Techniques..........................................................................19
6.5 SPI Communication (DRV8311S only).............................................................................................................................19
7 Schematics............................................................................................................................................................................21
7.1 Main Supply / Status LEDs.............................................................................................................................................. 21
7.2 DRV8311H/S/P.................................................................................................................................................................21
7.3 3.3V Buck Regulator........................................................................................................................................................ 22
7.4 Voltage Reference............................................................................................................................................................23
7.5 LaunchPad Connections.................................................................................................................................................. 23
7.6 Connectors & Interface.................................................................................................................................................... 24
7.7 Voltage Sense & Protection............................................................................................................................................. 25
8 Revision History................................................................................................................................................................... 26
Trademarks
All trademarks are the property of their respective owners.
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1 Cautions and Warnings
Observe the following cautions and warnings as printed on the EVM board.
HOT SURFACE:
Caution Hot Surface! Contact may cause burns. Do not touch. Please take the proper
precautions when operating.
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2 Introduction
The DRV8311 is a 3-V to 20-V, 5-A peak integrated three-phase integrated FET driver IC for motor drive
applications. It provides three accurately trimmed and temperature compensated half-bridges capable of directly
driving a 3-phase Brushless-DC motor. The DRV8311 integrates multiple control interface options, low-side
integrated current sense resistors and sense amplifiers, a 3.3-V 100-mA LDO regulator, and a variety of
protection and control features. The device is available in the hardware variant (DRV8311H), SPI variant
(DRV8311S), and Texas Instruments SPI (tSPI) variant (DRV8311P) as shown in Table 2-1 For more information
on tSPI, please see Section 4.4.3 and visit the DRV8311 product page for more resources.
Table 2-1. DRV8311x Device Variants
Device Name Device Description
DRV8311H Hardware variant
DRV8311S SPI variant
DRV8311P Texas Instruments SPI (tSPI) variant
The DRV8311HEVM can be interfaced with the TMS320F280049C microcontroller on the LAUNCHXL-
F280049C LaunchPad in correspondence with the reference software to provide the algorithm to the DRV8311
to control the BLDC motor.
This document serves as a startup guide to supplement the DRV8311HEVM + LAUNCHXL-F280049C BLDC
motor control demo kit. It also is intended to help engineers design, implement, and validate reference hardware
and software for the LaunchPad MCU and DRV8311. For step by step details on connecting the LAUNCHXL-
F280049C + DRV8311HEVM, installing software, and running the project to spin a motor, refer to Section 5.
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Figure 2-1. DRV8311HEVM PCB Layout
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3 Quick Start Guide
The DRV8311HEVM requires a power supply with a recommended operating range from 3-V to 20-V. To setup
and power the EVM, follow the sequence below:
1. Connect the power supply ground to the GND of the 2-pin power connector J3 and the power supply positive
terminal to the VM pin of J3. Ensure jumpers JP1, JP2, and JP3 of the LAUNCHXL-F280049C are populated
to ensure that 3.3 V and 5 V are powered from the LaunchPad.
2. Connect the motor phases to OUTA, OUTB, and OUTC in the correct order. For sensored applications,
connect the Hall sensors to the appropriate locations on the 5-pin connector J4 as shown in Figure 4-2.
Select 3V3 or 5V on jumper J6 to choose the Hall power source voltage.
3. Mate the DRV8311HEVM onto the top half of the LAUNCHXL-F280049C (LaunchPad Headers J1/J3 and
J2/J4) as shown in Figure 4-3. The motor and power connectors should face the same direction as the
Micro-USB connector on the LaunchPad.
4. Connect a Micro-USB cable from the computer into the Micro USB connector on the top of the LAUNCHXL-
F280049C.
5. Power on the DRV8311HEVM.
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4 Hardware and Software Overview
4.1 Hardware Connections Overview – DRV8311HEVM + LAUNCHXL-F280049C
Figure 4-1 shows the major hardware blocks of the DRV8311HEVM. The DRV8311HEVM is designed for an
input supply from 3-V to 20-V. The DRV8311 includes three integrated half-bridges that can drive up to 5-A peak
current which can be used in conjunction with an external MCU for sensored or sensorless trapezoidal control,
sinusoidal control, or Field-oriented control (FOC).
GND
Motor Connectors
and Test Points
Hall
connectors
Current Shunt
Amplifier Outputs
Power
DRV8311S/H/P
3.3V buck
regulator
tSPI Address Select
(DRV8311P only)
VIN_AVDD / Hall
Power select
Hardware variant
jumpers (DRV8311H
only)
GND
Voltage rail test
points / LEDs
SPI enable / test points
(DRV8311S only) VM test point and LED
Figure 4-1. Major hardware blocks of the DRV8311HEVM
4.2 Connection Details
Figure 4-2 shows the power supply and motor connections made to the DRV8311HEVM in order to spin a
3-phase sensored or sensorless Brushless-DC motor.
A 3-V to 20-V power supply or battery is connected to the VM and GND terminals. The three phases of the
BLDC motor connect directly to the OUTA, OUTB, and OUTC terminals of the screw terminal provided on the
DRV8311HEVM.
For sensored applications, to connect the Hall sensor outputs to the Hall connectors on the DRV8311HEVM,
push down on the respective terminals to open the sockets and insert the Hall sensor wires.
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HALL_PWR
HALLA
HALLB
HALLC
GND
OUTC VM GND
OUTB OUTA
Figure 4-2. Connections from motor to DRV8311HEVM
Figure 4-3 shows where the Micro-USB cable is plugged in to the LAUNCHXL-F280049C to provide
communication between the LaunchPad firmware and GUI as well as the correct installment of the
DRV8311HEVM to the J1/J3 and J2/J4 headers of the LaunchPad.
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Figure 4-3. DRV8311HEVM on headers J1/J3 and J2/J4 of LaunchPad and Micro-USB plugged into
LaunchPad
4.3 LED Lights
There are LED indicators on both the LAUNCHXL-F280049C and DRV8311HEVM when power is provided and
the micro USB cable is plugged in to the LaunchPad.
The DRV8311HEVM has 4 status LEDs on the board. By default, the VM and 3V3 LEDs will light up when the
board is powered on. The fault LED will light up when the driver reports a fault, and the MCU LED (tied to
GPIO59) can be used for debugging and validation. Table 4-1 shows the LED descriptions, with the LEDs that
are on during power up indicated in bold. Figure 4-4 shows the LED locations on the EVM.
Table 4-1. Description of DRV8311HEVM LEDs (on during power up in bold)
Designator Name Color Description
D2 3V3 Green AVDD is outputting 3.3 V
D3 nFAULT Red Lights up when fault condition
has occurred on DRV8311
D4 VM Green Power is supplied to the board
D5 MCU_LED Orange MCU debugging
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VM LED
MCU LEDnFAULT LED 3.3V LED
Figure 4-4. DRV8311HEVM LEDs
4.4 DRV8311HEVM Configurability – Jumpers and Resistors
The DRV8311HEVM includes a variety of user-selectable jumpers and unpopulated components on the PCB
to choose user settings and evaluate the DRV8311S, DRV8311H, or DRV8311P device. A summary of those
selectable settings is listed in Table 4-2 (defaults in bold) and can be seen on the board in Figure 4-5. Section
4.4.2 and Section 4.4.3 describes the changes that need to be made to the board in order to use the SPI and
tSPI variants as the main motor driver IC.
Table 4-2. Description of user selectable settings on DRV8311HEVM (H variant defaults in bold)
Id. Setting Name Description Position Function
A AD0 select
AD1 select
(DRV8311P only) Use
J8 and J7 jumpers to
select device address.
DNP jumper if DRV8311P
is not used.
J8 = Left AD0 = 0
J8 = Right AD0 = 1
J7 = Left AD1 = 0
J7 = Right AD1 = 1
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Table 4-2. Description of user selectable settings on DRV8311HEVM (H variant defaults in bold)
(continued)
Id. Setting Name Description Position Function
B GAIN select (DRV8311H only) Use J11
to select desired gain
settings. DNP jumper if
DRV8311H is not used.
J11 = Bottom 0.25 V/A
J11 = Middle 0.5 V/A
J11 = No Jumper 1 V/A
J11 = Top 2 V/A
C SLEW select (DRV8311H only) Use J10
jumper to select desired
slew rate settings. DNP
jumper if DRV8311H is not
used.
J10 = Bottom 25 V/us
J10 = Middle 50 V/us
J10 = No Jumper 125 V/us
J10 = Top 200 V/us
D MODE select (DRV8311H only) Use J12
jumper to select desired
PWM mode. DNP jumper
if DRV8311H is not used.
J12 = Bottom 6x PWM mode
J12 = Middle 6x PWM mode
J12 = No Jumper 3x PWM mode
J12 = Top 3x PWM mode
E Power LaunchPad from
buck
0-ohm resistor used to
supply power from buck
to LaunchPad. DNP
if powering LaunchPad
externally see section _ on
MCU Power
See section 3.4.4 MCU
power options
F Supply 5 V from
LaunchPad
Supplies 5 V to some
of the EVM circuitry from
the F280049C LaunchPad
boost converter.
R15 is populated Supply 5 V from
LaunchPad
R15 is DNP Supply 5 V externally from
TP23
G Supply 3.3 V from buck Connects buck 3.3 V
voltage to supply main 3.3
V.
R7 is populated Connects buck output to
supply 3.3 V rail
R7 is DNP Supply 3.3 V externally
from TP22
H VIN_AVDD select Use J5 to supply
VIN_AVDD voltage from
either VM or 5 V.
J5 = Left VIN_AVDD supplied from
VM
J5 = Right VIN_AVDD supplied from
5 V
I HALL_PWR select Use J6 to supply Hall
power from 3.3 V or 5 V.
J6 = Left Hall power supplied
from 3.3 V
J6 = Right Hall power supplied from 5
V
J S/H/P variant connections Populate specific resistors
to properly use the SPI,
Hardware, or tSPI variant.
Populate R1, R8, R9, R10,
R11, and R13
DNP R12 and R41
SPI connections
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(I) J6 = HALL_PWR select
(H) J5 = VIN_AVDD select
(B) J11 = GAIN select (H/W var.)
(C) J10 = SLEW select (H/W var.)
(D) J12 = MODE select (H/W var.)
(A) J8 = AD0 select (tSPI var.)
J7 = AD1 select (tSPI var.)
(J) R1, 8, 9, 10, 11, 13 = SPI connections
R1, 12 = Hardware connections
R8, 9, 10, 12, 13, 41 = tSPI connections
(E) R14 = Power Launchpad from Buck
(F) R15 = Supply 5V from Launchpad
(G) R7 = Supply 3V3 from buck
(K) R22 = VREF supplies CSA REF
(L) Optional CSA output filtering
Figure 4-5. User-selectable jumpers and DNP components on DRV8311HEVM
4.4.1 DRV8311H Compatibility
The DRV8311HEVM default is the DRV8311H (Hardware variant), which can be used to spin a 3-phase
Brushless-DC motor with selectable modes configured with hardware settings as shown in Table 4-3.
Note
DRV8311H Hardware settings are stuck at default settings (GAIN = 0.5V/A, SLEW = 200V/us, MODE
= 6x PWM) for MD045A. N FAULT must be pulled up externally before VM > UVLO to latch the correct
H/W settings. To fix, implement once of the following workarounds:
1. If using the DRV8311HEVM with an external MCU, remove R7 to disconnect buck supply. Apply
external 3.3V to the 3.3V test point. Power on the DRV8311HEVM.
2. If using the DRV8311HEVM with the LAUNCHXL-F280049C, remove R7 to disconnect buck
supply. Connect the LaunchPad to the DRV8311HEVM, and connect the micro-USB cable into the
LaunchPad to power the 3.3V supply to the DRV8311HEVM. Power on the DRV8311HEVM.
When using the DRV8311H, resistors R1, and R12 must be populated with 0-ohm resistors, and resistors R8,
R9, R10, R11, R13, and R41 must be left unpopulated. This allows the user to select settings using the MODE,
SLEW, and GAIN pins by using jumpers on J10, J11, and J12. An outline of the various hardware selectable
settings can be found below.
Table 4-3. Description of Hardware settings for DRV8311H
Setting Position Description
MODE AVDD 3x PWM Mode
Hi-Z (DNI) 3x PWM Mode
47k to GND 6x PWM Mode
GND 6x PWM Mode
SLEW AVDD 200 V/μs
Hi-Z (DNI) 125 V/μs
47k to GND 50 V/μs
GND 25 V/μs
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Table 4-3. Description of Hardware settings for DRV8311H (continued)
Setting Position Description
GAIN AVDD 2 V/A
Hi-Z (DNI) 1 V/A
47k to GND 0. 5 V/A
GND 0.25 V/A
4.4.2 DRV8311S Compatibility
The DRV8311HEVM is compatible with the DRV8311S (SPI variant) to spin a 3-phase Brushless-DC motor. The
DRV8311S replaces the hardware settings (MODE, SLEW, and GAIN) as well as the nSLEEP setting with 4 SPI
signals: SDI, SDO, SCLK, and nSCS.
When using the DRV8311S, resistors R1, R8, R9, R10, and R11 must be populated with 0-ohm resistors, R13
must be populated with a 5.1k ohm resistor, and resistors R12 and R41 must be unpopulated. Additionally, the
jumpers must be removed from J10, J11, and J12. This properly connects the SPI signals to the correct pins on
the device.
4.4.3 DRV8311P Compatibility
The DRV8311HEVM is compatible with the DRV8311P (tSPI variant) to spin a 3-phase Brushless-DC motor
using enhanced Texas Instruments SPI (tSPI). tSPI is a protocol that allows for multiple motor drivers to be
controlled via one SPI bus. Each device has a selectable address in hardware and tSPI protocol allows for
individual control of each driver through SPI communication from a single microcontroller unit (MCU).
When using the DRV8311P, resistors R8, R9, R10, R12, and R41 must be populated with 0-ohm resistors, R13
must be populated with a 5.1k ohm resistor, and resistors R1 and R11 must be unpopulated. Additionally, the
jumpers must be removed from J10, J11, and J12. This properly connects the tSPI signals to the correct pins on
the device. In order to set the address of the device, jumpers must be used on J7 and J8 to select AD0 and AD1.
This address sets the unique address of the device to allow tSPI to properly communicate with the driver. Up to 4
DRV8311P EVMs can be controlled with a single MCU through the tSPI protocol, but a unique address must be
set for each device using J7 and J8 jumpers.
4.4.4 MCU Power Options
The DRV8311HEVM has several options for powering the LAUNCHXL-F280049C or an external MCU. Table 4-4
provides a description of the various MCU power options.
Table 4-4. MCU power options
LAUNCHXL-F280049C connections DRV8311HEVM connections Result
JP1, JP2, and JP3 are populated R14 and R7 are populated MCU is powered both from the USB of the
LaunchPad and the 3V3 rail of the EVM’s
buck regulator.
JP1, JP2, and JP3 are populated R14 is populated, R7 is not populated, no
external 3V3 supplied to EVM
MCU is powered from the USB of the
LaunchPad, and the LaunchPad will supply
3V3 to the EVM.
JP1, JP2, and JP3 are populated R14 is populated, R7 is not populated,
external 3V3 supplied to EVM through TP22
MCU is powered both from the USB of
the LaunchPad and from the external 3V3
supplied to the EVM
JP1, JP2, and JP3 are populated R14 is not populated MCU is powered from USB power supply
JP3 is populated, JP1 and JP2 are not
populated
R14 and R7 is populated MCU is powered completely from the 3V3 of
the buck of the EVM
JP3 is populated, JP1 and JP2 are not
populated
R14 is populated, R7 is not populated,
external 3V3 supplied to EVM through TP22
MCU is powered completely from the external
3V3 supplied to the EVM
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4.4.5 Interfacing DRV8311HEVM and LAUNCHXL-F280049C LaunchPad
The DRV8311HEVM has 40 pins with different functions. These pins are interfaced with the
LAUNCHXLF280049C LaunchPad development kit and are mapped appropriately to receive the functionalities
of the DRV8311H device. These 40 pins are grouped into 4 ports in respect to the LAUNCHXL-F280049C (J1 to
J4). Table 4-5 and Table 4-6 list the interfacing of these ports of the DRV8311HEVM headers J3 and J4.
Table 4-5. Connections for Header J1 on DRV8311HEVM (DNP in bold)
J1 Pin Number DRV8311HEVM Function LAUNCHXL-F280049C Function Description
1 3.3 VBK +3.3 V 3.3 V LaunchPad Supply
2 5 V supply +5 V 5 V Boost from LaunchPad
3 Not used PGA1/3/5_GND Not used
4 AGND GND GND connection
5 Not used GPIO13/SCIBRX Not used
6 VSENA ADCINA5 Phase A Voltage Sense
7 HALLC GPIO40/SCIBTX Hall sensor C from motor
8 VSENB ADCINB0 Phase B Voltage Sense
9nSLEEP (DNP) NC For internal use only
10 VSENC ADCINC2 Phase C Voltage Sense
11 Not used ADCINB3/VDAC Not used
12 VSENVM ADCINB1 VM Bus Voltage Sense
13 SCLK SPIACLK SPI Clock (DRV8311S and
DRV8311P only)
14 ISENA ADCINB2 Phase A low side Current Sense
15 nFAULT (DNP) ADCINC4 For internal use only
16 ISENB ADCINC0 Phase B low side Current Sense
17 nSLEEP GPIO37 Active-low input to sleep pin
18 ISENC ADCINA9 Phase C low side Current Sense
19 nFAULT GPIO35 Active-low output from fault pin
20 C_TAP ADCINA1 ADC for Center Tap sensing
Table 4-6. Connections for Header J2 on DRV8311HEVM
J2 Pin Number DRV8311HEVM Function LAUNCHXL-F280049C Function Description
1 INHA GPIO10/PWM6A PWM used to switch High-side
FET of Phase A (DRV8311H and
DRV8311S only)
2 AGND GND GND connection
3 INLA GPIO11/PWM6B PWM used to switch Low-side
FET of Phase A (DRV8311H and
DRV8311S only)
4 nSCS SPIASTE SPI active-low chip select
(DRV8311S only)
5 INHB GPIO8/PWM5A PWM used to switch High-side
FET of Phase B (DRV8311H and
DRV8311S only)
6 Not used NC Not used
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Table 4-6. Connections for Header J2 on DRV8311HEVM (continued)
J2 Pin Number DRV8311HEVM Function LAUNCHXL-F280049C Function Description
7 INLB/PWM_SYNC GPIO9/PWM5B PWM used to switch Low-side
FET of Phase B (DRV8311H and
DRV8311S), or PWM used to
synchronize PWM signals with
MCU (DRV8311P)
8 Not used NC Not used
9 INHC GPIO4/PWM3A PWM used to switch High-side
FET of Phase (DRV8311H and
DRV8311S only)
10 Not used XRSn Not used
11 INLC GPIO5/PWM3B PWM used to switch Low-side
FET of Phase C (DRV8311H and
DRV8311S only)
12 SDI SPIASIMO SPI data input (DRV8311S and
DRV8311P only)
13 HALLA GPIO58 HALL sensor A from motor
14 SDO SPIASOMI SPI data output (DRV8311S and
DRV8311P only)
15 HALLB GPIO30 HALL sensor B from motor
16 Not used GPIO39 Not used
17 Not used GPIO18/XCLKOUT (not
connected)
Not used
18 Not used GPIO23/LED4 LED reserved on LaunchPad
19 CSA_REF (DNP) GPIO25 For internal use only
20 MCU_LED GPIO59 Visual feedback for LaunchPad
connection
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5 Hardware Setup
The hardware required to run the motor control is the LAUNCHXL-F280049C LaunchPad development kit, the
DRV8311HEVM, a Micro-USB cable, and a power supply with a DC output from 3-V to 20-V. Follow these steps
to set up the evaluation module:
1) Ensure all resistors or jumpers are set up accordingly according to the device variant used. The
DRV8311HEVM by default is populated with and configured for the DRV8311H (hardware variant). If using
the DRV8311S or DRV8311P, please follow row J of Table 4-2 to configure the board for the DRV8311x device
variant populated for U1.
2) Mate the DRV8311HEVM board to the top half of the LAUNCHXL-F280049C LaunchPad development kit
(mates to J1/J3 and J2/J4 of LaunchPad, as in Figure 4-3).
NOTE: Observe the correct orientation when placing DRV8311HEVM to the LAUNCHXL-F280049C. The motor and power connectors
should face to the LaunchPad’s Micro-USB connector.
3) Connect the three phases from the brushless-DC motor to the 3-pin connector J9 on DRV8311HEVM. Phases
OUTA, OUTB, and OUTC are labeled in white silkscreen on the PCB top layer.
NOTE: If using a sensored algorithm on the LaunchPad development kit, connect Hall sensors to the 5-pin connector J4.
4) Connect the DC power supply to header J5.
NOTE: Observe the correct polarity VM and GND connections on the DRV8311HEVM connector J3.
5) Connect a Micro-USB cable to the LaunchPad development kit and computer.
6) Turn on the power supply and power up the PCB.
If using the DRV8311HEVM with an external microcontroller, make the connections needed on the male headers
on the top of the board or female connectors on the bottom side of the board.
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6 Firmware and GUI Application
The DRV8311HEVM can implement sensored, sensorless, or Field-oriented control for commutating a 3-phase
Brushless-DC motor. The supported firmware is a sensorless Field-oriented control algorithm adapted from
Texas Instruments’ MotorControl SDK Library of motor solutions. The firmware includes motor identification and
a sensorless FOC algorithm to spin the motor. The firmware uses the DRV8311HEVM InstaSPIN Universal GUI
to run the algorithm and includes tabs to read from and write to the DRV8311 SPI registers (DRV8311S only).
The steps below will describe how to identify useful motor parameters, spin the motor, and work with the
DRV8311S SPI registers. For more information on more advanced features of the C2000 InstaSPIN Universal
GUI such as torque and speed control, MTPA, or Field-weakening, consult the MotorControl SDK InstaSPIN Lab
Guide (in the MotorControl Software Development Kit tool page) and InstaSPIN-FOC and InstaSPIN-MOTION
User’s Guide.
6.1 C2000 InstaSPIN Universal GUI
1. Follow the instructions in Section 5 and ensure the LAUNCHXL-F280049C is connected to the PC and the
power supply is turned on to the DRV8311HEVM PCB.
2. Search for the GUI Composer Galllery through https://dev.ti.com/gallery/search/drv8311xevm. You will to
login with a myTI account in order to access the GUI.
3. Accept the readme as shown in Figure 6-1 and check the bottom left hand corner of the screen for
“Hardware Connected”. Once connected, the GUI will flash the algorithm to the MCU as shown in Figure 6-2.
Figure 6-1. C2000 InstaSPIN Universal GUI Readme
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Figure 6-2. C2000 InstaSPIN Universal GUI Downloading Program
6.2 Motor Identification
1. Check the “Enable System” box to enable the InstaSPIN algorithm and run preset calibrations. Wait for the
“OffsetCalc” button to uncheck automatically to finish calibrating board offsets.
2. Check the “Run” box to begin the motor identification algorithm as shown in Figure 6-3. The motor will
begin to spin and stop as it goes through many states to calculate and identify useful motor parameters for
sensorless Field-oriented control. This should take no more than a couple of minutes.
3. Once the motor identification process is complete, the “Motor Identified” indicator will light up, the “Run” box
will be automatically unchecked, and the values Rs, Rs Online, Ls-d, Ls-q, Flux, and Rr will update for that
motor as shown in Figure 6-4. These values will be automatically used for Field-oriented control.
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Figure 6-3. C2000 InstaSPIN Universal GUI Running motor identification
Figure 6-4. Motor identification complete using the DRV8311HEVM InstaSPIN GUI
6.3 Sensorless-FOC Commutation
1. To spin the motor with sensorless FOC, check the “Run” box again. The motor will spin with sinusoidal
current at the speedRef (Hz) value in the GUI, which is automatically set to 20.0 Hz. Use the speedRef (Hz)
input to change the current speed of the motor as shown in Figure 6-5. The GUI automatically calculates
the current reference speed using the variable speed (Hz) and compares it to the trajectory speed variable
speedTraj (Hz) to calculate the Speed Error (Hz) and as a percentage.
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Figure 6-5. Sensorless-FOC commutation using the DRV8311HEVM InstaSPIN GUI
6.4 Torque Control, Speed Control, and Advanced Modulation Techniques
To implement more advanced modulation techniques such as torque control, speed control, and algorithms such
as MTPA, Field-weakening, and PowerWarp (EPL) using the DRV8311HEVM InstaSPIN Universal GUI, please
consult the MotorControl SDK InstaSPIN Lab Guide found in MotorControl SDK.
This document contains detailed lab overviews of how to implement each advanced modulation technique when
using sensorless FOC to spin the BLDC motor in Code Composer Studio. In order to use the project with the
GUI, the user must build and compile the project in CCS, and import the .out binary file for that project into the
GUI properties through GUI Composer. More information can be found in the README when the GUI is first
opened.
6.5 SPI Communication (DRV8311S only)
The DRV8311HEVM InstaSPIN_Universal_GUI includes three SPI register tabs for the DRV8311S: Status
Registers, Control Registers, and PWM Generation Registers. For InstaSPIN-FOC, only the Status and Control
Registers will be used since internal PWM generation is not a supported use case for InstaSPIN-FOC for the
DRV8311H and DRV8311S.
1. Click on the “DRV8311S Control Registers” tab to access the DRV8311S Control Registers as shown in
Figure 6-6.
2. Choose the desired settings by selecting from the drop-down menus for each setting. Clicking a setting
description selects the bits required for that control register setting. Consult the DRV8311 datasheet (Section
8.6 Register Map) for detailed definitions of settings.
3. Click on “Write” to write to all control registers in the device with the configured settings.
4. To read all status and control registers in the device, click on “Read”. The statuses and settings will
auto-populate in the DRV8311S Status Registers and Control Registers.
5. Alternatively, to write data to a specific address, input the address and data in decimal into the address and
data inputs above the “Manual Write” box. Click on the “Manual Write” box to write the data to that address.
To read data from a specific address, input the address in decimal into the address above the “Manual Read”
box. Click on the “Manual Write” box to read the data from that address.
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Figure 6-6. DRV8311HEVM InstaSPIN GUI SPI Control Registers
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