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DRV8353RS-EVM: Unable to rotate motor smoothly

Ashish Pokhriyal
Prodigy 60 points

Part Number: DRV8353RS-EVM

Hello TI Community,

I am using the DRV8353RS gate driver with a 3-phase BLDC motor and the official Field-Oriented Control (FOC) GUI. My setup communicates successfully and the motor runs, but the GUI constantly displays a large negative speed error (e.g. -97 RPM) and estimates that the motor speed is negative, even though my reference speed is positive and I command forward rotation.

suggets me GUI configuration .

NOte :drv8353rs evm is connected to 30volt supply.

1.In default 6pwm mode motor is stuttring with fault led is blinking.

2.In 1PWM mode motor is making sound no fault led but speed is ngative again and also no rotation in motor.

PFA Scrrenshots

B.r

Ashish

image.png

CaptureGUI.PNG

  • 0
    TI__Expert 6975 points

    Hi Ashish,

    Did you follow user's guide for the GUI and EVM? If so, let me know where is the first step in the guide that you encounter an error behavior.

    Thanks,

    Joseph

  • 0 in reply to Joseph Ferri
    Prodigy 60 points

    Hi Joseph Ferri

    I am facing a issue in which I abled download firmware in GUI but my fault bit and GDF bit is set. Earlier it was fine there was no error at the time of startup and my controller state is showing offline.

    NOTE: I didn't ran the motor yet still fault GDF has set.

    2. Do I need to enable user.h others option I have enabled .

    3. One more thing I have noticed that my gate DRIVEr HS register is set to 0x333 when I turn on system enable which was earlier 3FF. why this is happening?

    B.R

    Ashish

  • 0 in reply to Ashish Pokhriyal
    TI__Expert 6975 points

    Hi Ashish, 

    If user.h Params is enabled when ‘Run’ is selected, the control system will bypass Motor ID and load all settings from user.h, including Offset.

    The gate driver HS register is set to 0x333 because the GUI programs the idrive currents to the 150/300mA setting. This is better for operation as you dont need high drive current of 0x3FF.

    Thanks,

    Joseph

  • 0 in reply to Joseph Ferri
    Prodigy 60 points

    Hi Joseph

    I have tested 6pwm mode motor rotate in one direction with no fault 6pwm mode works fine , but in 1pwm mode motor is stuttering with fault led.

    and in 3pwm mode there is no error no fault led but motor is not responding at all.

    Can you explain Why I am seeing this behavior?

    B.R

    Ashish

  • 0 in reply to Ashish Pokhriyal
    TI__Expert 6975 points

    Hi Ashish,

    You are making sure to program the register to 3x or 1x mode if you are using those modes? 

    The DRV would need to be programmed in the PWM_MODE register for each specific mode. It is 6x by default so this makes sense if you are not changing it.

    Thanks,

    Joseph