MCF8316C-Q1: How do I use Motor Studio's Smart Tuning to get my motor to spin?

zhanhao zhou

Part Number: MCF8316C-Q1

Tool/software:

I have a new MCF8316CEVM and have connected it to a motor. The motor has one pole pair, a phase resistance of 8.4 ohms, and a phase inductance of 0.05 mh. I have followed the instructions to change the switches and other hardware of the MCF8316CEVM to the correct positions and entered some parameters. However, after running the device, I get an error message. How should I resolve this issue? Do I need to import a configuration file into the new MCF8316C chip first?

7 days ago

0 zhanhao zhou 7 days ago

Prodigy 20 points

The rated voltage of the motor is 12V, the rated current is 0.75A, and the speed is 25500 rpm.

0 Venkatadri Shantaram84961 6 days ago in reply to zhanhao zhou

TI__Mastermind 23572 points

For 1 pole pair (2 poles), the max speed is 425 Hz, can you verify again?

Also, is 0.75A is when motor is at max speed or stall current?

Thanks and Best regards

Venkatadri S

0 zhanhao zhou 6 days ago in reply to Venkatadri Shantaram84961

Prodigy 20 points

The max speed should be set to 424Hz. I forgot to multiply the number of poles. My motor is a hollow cup motor and has a 16-stage reduction gearbox. The rated current is 0.75A and the stall current is 1.65A. However, after changing the maximum speed, the motor still starts unstable. I still don't know what is the reason.

Thanks and Best regards.

zhou.

0 Venkatadri Shantaram84961 6 days ago in reply to zhanhao zhou

TI__Mastermind 23572 points

Can oy also allow SmartTune to find R, L.

Do not program the value and just run.

Please follow the FAQ (+) [FAQ] MOTORSTUDIO: SmartTune FAQ - Motor drivers forum - Motor drivers - TI E2E support forums

Thanks and Best regards

Venkatadri S

0 zhanhao zhou 6 days ago in reply to Venkatadri Shantaram84961

Prodigy 20 points

Hi.

My motor has a rated speed of 25500. Regardless of whether it has a reduction gearbox or not, is the maximum speed of the motor 425Hz?
Thanks and Best regards

zhou

0 Venkatadri Shantaram84961 6 days ago in reply to zhanhao zhou

TI__Mastermind 23572 points

Yes max rated speed is 425Hz but with gearbox is there any possibility of reduction in speed due to load?

Thanks and Best regards

Venkatadri S

0 Venkatadri Shantaram84961 22 hours ago in reply to Venkatadri Shantaram84961

TI__Mastermind 23572 points

Can you also refer to the app note SmartTune User Guide: How to Quickly Setup and Spin Your 3-Phase BLDC Motor

Thanks and Best regards

Venkatadri S