MCT8315ZEVM: Unable to Hold position.

Parag Bobade

Part Number: MCT8315ZEVM

Tool/software:

Hello all,
I am using the MCT8315ZEVM to drive BLDC motors with Hall sensors. I am trying to implement position control (or servo like behavior) with the help of EVM board. Currently I am running into the following issues: -

1) The nFault triggers when the motor stalls. (We need motor to stall for position control).
2) This is also seen when the motor changes its direction. There is a delay due to nFault toggle which results in jerky behaviour of the motors.

Is there a way to resolve this issue by bypassing the nFault flag and achieving the position control?

Thanks,
Parag

7 months ago

0 Venkatadri Shantaram84961 7 months ago

TI__Mastermind 23462 points

Hi Parag,

I will respond to you by tomorrow.

Thanks and Best Regards

Venkatadri S

0 Venkatadri Shantaram84961 6 months ago in reply to Venkatadri Shantaram84961

TI__Mastermind 23462 points

Hi Parag,

How are you stalling the rotor? With external load? If rotor is stalled while spinning then Fault will trigger. We can not by pass the fault detection logic.

Also, do not change direction dynamically, motor should be in idle before changing the direction.

Thanks and Best Regards

Venkatadri S

0 Venkatadri Shantaram84961 6 months ago in reply to Venkatadri Shantaram84961

TI__Mastermind 23462 points

Hi Parag,

Do you have anymore question or issue?

Thanks and Best Regards

Venkatadri S

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MCT8315ZEVM: Unable to Hold position.