TMS320F280025C: Universal Motor Control Lab - currentUnbalance fault

Eyal Kurz

Tool/software:

Hey, I'm trying to implement a Hall Sensored-FOC/Sensorless-FOC on a custom PCB.

I'm trying to go through the 4 build levels of the Universal Motor Control Lab SDK.
I manage to successfully get the motor to spin through the first 3 build levels.

However, when trying to get the build level 4(with MOTOR1_HALL, HALL_CAL flags on and also when toggling on the MOTOR1_FAST flag) to work,
I constantly get the currentUnbalance fault and my motor won't start.

What could be the reasons for this fault to occur?
What tests should I focus on first?

I use TMS320F280025C with DRV8323S.

Thanks,
Eyal

over 1 year ago

0 Yanming Luo over 1 year ago

TI__Guru** 117270 points

Did you try to run the motor with FAST only? Any happens?

If you want to run the motor with HALL only, you have to make sure that the hall signal are detected correctly, and the hall angle table (hallAngleBuf) is configured correctly as well.

0 Eyal Kurz over 1 year ago in reply to Yanming Luo

Prodigy 60 points

I'm currently not using the ADC to convert voltages from the three motor phases. I figured this isn't necessary if I wish to run hall sensored-FOC.

Is there a guide on how to properly configure the hall angle table? I guess it's worth a try.

Thanks!

0 Eyal Kurz over 1 year ago in reply to Yanming Luo

Prodigy 60 points

Hey, so I tried using an evaluation board to generate the hallAngleBuf for my motor.
However, I noticed the values it generates for each state doesn't converge to a specific value, but keep changing.
I tried running it with HALL_CAL, MOTOR1_FAST and also tried adding the MOTOR1_HALL as well.
How should this process be done?

Thanks,
Eyal

0 Yanming Luo over 1 year ago in reply to Eyal Kurz

TI__Guru** 117270 points

Yes. You need to run the motor with FAST, and use the FAST to calibrate the HALL by enabling HALL_CAL.

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280025C: Universal Motor Control Lab - currentUnbalance fault