BOOSTXL-DRV8323RS: EVM cannot commutate motor in Six Pulse IPD mode; Rotor Align mode spins up and faults due to stall.

Kenneth Kleinsmith

Part Number: BOOSTXL-DRV8323RS
Other Parts Discussed in Thread: MSP-EXP430F5529LP

New to BLDC motors, and having consistent issues.

I am using a BOOSTSL-DRV8323RS as a gate driver and a MSP-EXP430F5529LP as a Launchpad to operate a A60-7XS V4 28-Pole kv330 motor.
I am running the BOOSTSL-DRV832x EVM.

When attempting to operate in Six Pulse IPD Mode, the motor emits a single chirp and typically does not move. Any indication as to why this occurs would be great.

Additionally, when operating in Rotor Align Mode, the motor begins to commutate, increases in RPM and then faults consistently.
Is this part of the program or is there a way to resolve this issue?

I have tried to operate under many different configurations of parameters to no avail.
The best results were under the following conditions attached in the

BLDC_decent_settings.txt

Sensorless Motor Control and Tuning
DRV832x Sensorless Software User's Guide
Device Configuration
Driver Utilized
DRV8323RS Sensorless
MODE

DRIVER ENABLE

Motor Control
MOTOR ENABLE

Set Motor Speed010020
20 %
Motor Direction
REVERSE
Motor Poles

PWM Switching Frequency
10
kHz

Motor Initial Position Mode

Status Report
FAULT STATUS INDICATOR
Electrical Speed
0 Hz
Current Motor Speed
0 RPM
 System Parameter Control
Min Off Duty
10
%

Min On Duty
15
%

Maximum Duty Cycle
100
%

Ramp Rate Delay
500
PWM Cycles

 Fault Handling Control
Under Voltage Limit
10
V

Over Voltage Limit
25
V

Stall Detect Rev Threshold
2
Revs

Stall Detect Timer Threshold
200
ms

Auto Fault Recovery Time
3000
ms

Motor Phase Current Limit
10
A

 Align Control
Align Sector
1
Align Wait Time
500
PWM Cycles

 Open Loop Acceleration Control
Acceleration Rate
4
Hz/s

Acceleration Stop
50000
mHz

Acceleration Velocity Constant
10000
mHz

 Closed Loop Control
BEMF Threshold
1000
counts

PWM Blank Counts
5
Clock Cycles

Startup Duty Cycle
4
%

Commutation Blank Time
5
PWM Cycles

Here is some specs on the motor.

Motor Technical Data:
Powerrange: max. 2300W (15 sec.)
Idle Current at 8,4V: 1,5A
inner resistance: 20mOhm
RPM / Volt: 320
Weight: 480g
Diameter: 60 mm
Length: 52 mm
Type: 28-Pole
recommended Timing: 25°
Switching Frequency: 8 kHz

Thank you.

over 5 years ago

0 Adam Sidelsky over 5 years ago

TI__Guru 63350 points

Kenneth,

Please snap a picture of your setup so I can see the connections and current configuration.

You mention faults, which faults are being reported?

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

Test Setup:

0 Adam Sidelsky over 5 years ago in reply to Kenneth Kleinsmith

TI__Guru 63350 points

Kenneth,

Did you resolve this issue or measure which fault are being generated?

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

I did not resolve the issue.

While operating in Six Pulse IPD mode, an "Unknown Fault" was triggered.

While operating in Rotor Align mode, "Stall Fault" was thrown.
The motor comutates, spins up to different levels (starts at 2% PWM, increases by 4% RPM, increases about 5 times, then stops spinning and buzzes, then produces STALL FAULT.

0 Adam Sidelsky over 5 years ago in reply to Kenneth Kleinsmith

TI__Guru 63350 points

Kenneth,

Do you have any more details on the "Unknown fault"?

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

How would I be able to get more information on the Faults?

I have tried using the EVM to update the registers but they do not update in time.

In Six Pulse IPD mode, the motor chirps and stays in place, yielding "Unknown Fault". After changing the settings in the GUI, it will produce "Voltage Fault".

In Motor Align mode, the motor starts commutating (spins up through a few incremented steps) and then stops, producing "Stall Fault".

I have tried modifying the values in the GUI for the BOOSTSL-DRV832X EVM.

I am trying to commutate a 28 pole motor which cannot be selected in the options provided. Perhaps this may be contributing.

0 Adam Sidelsky over 5 years ago in reply to Kenneth Kleinsmith

TI__Guru 63350 points

Kenneth,

Please click the following Pencil button and check for which fault registers are flagging:

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

0 Kenneth Kleinsmith over 5 years ago in reply to Kenneth Kleinsmith

Prodigy 160 points

The registers don't seem to update or change

0 Adam Sidelsky over 5 years ago in reply to Kenneth Kleinsmith

TI__Guru 63350 points

Kenneth,

Are you sure the board is powered, enabled, connected via USB, and having a fault at the time you are checking the register map?

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

What do you mean enabled?

I have the board powered and connected via USB, connected to external power supply to provide the additional power to operate the motor, and tried multiple ways of updating the register map while the fault is occurring.

The automatic update does not seem to work. I have also tried updating the registers via the update button at various times through the process, all to no avail.

0 Adam Sidelsky over 5 years ago in reply to Kenneth Kleinsmith

TI__Guru 63350 points

Kenneth,

The driver must be enabled through this button:

If the board is powered through the VM+ connector with more than 6V and the USB connection is plugged in, you should see the following by default:

Have you tried restarting the PC, turning off the EVM power completely and replugging the USB?

Can you try a second EVM in case the first one is broken?

Do you have any motors that are 4-8 pole?

Regards,

-Adam

0 Kenneth Kleinsmith over 5 years ago in reply to Adam Sidelsky

Prodigy 160 points

Adam,

I was able to resolve the stalling issues by systematically modifying the GUI and was able to obtain commutation with:
Set Motor Speed (28%)
Under Voltage Limit (6 V)
Over Voltage Limit (30 V)
Motor Phase Current Limit (30 A)
Startup Duty Cycle (20%)

While operating in Rotor Align mode.

Thank you for your help!

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BOOSTXL-DRV8323RS: EVM cannot commutate motor in Six Pulse IPD mode; Rotor Align mode spins up and faults due to stall.