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LAUNCHXL-F280049C: Execute demo DRV8300-EVM-GUI 1.0.3

Ray Vincent Aranzaso
Mastermind 18180 points
Part Number: LAUNCHXL-F280049C
Other Parts Discussed in Thread: DRV8300DRGE-EVM, DRV8300

Hi,

Good Day. I have a customer wo is working with LAUNCHXL-F280049C & DRV8300D. Please see below his query for your reference. Thank you very much.

"I am using launchpad f280049c board and a DRV8300D motor controller board I am trying to execute demo DRV8300-EVM-GUI 1.0.3 I made HW connections but motor start for small duration and gives overcurrent fault."

Best Regards,

Ray Vincent

  • 0
    TI__Guru** 116090 points

    Does the motor have hall sensor? And connect the hall sensor as described in the user's guide?

  • 0 in reply to Yanming Luo
    TI__Mastermind 18180 points

    Hi Yanming,

    Good Day. Please see below the response of our customer to your question. Thank you very much.

    Yes this BLDC motor has 4 Hall sensors, out of 4 we have connected A,B,C to DRV8300DRGE-EVM MDO030A as described in user guide.
    We are using LAUNCHXL - F280049C board
     
    Want to give some more details as below,
    1. Power supply given to DRV board -
    PVDD = 41.5 V
    HALL_PWR = 3.2V
    Software showing PVDD Voltage = 42.98 V GVDD = 12.3 and Board Temperature = 35.3
    2. Using below SW setting -
    EVM Selection = Normal PWM
    Acceleration delay = 50
    Over-Current Limit = 25
    Current Sense Resistor = 0.003
    CSA Gain = 1
     
    When we enable the output and as we go on increasing duty cycle up to 16
    Motor slightly run but then we give more than 16 % duty cycle, PVDD = 25.1 GVDD = 12.0 Board Temperature = 49.98
    Then Hardware gets disconnected.
     
    Sometimes it gives Over-current Fault also.
     
    Please suggest to us what we are missing.

    Best Regards,

    Ray Vincent

  • 0 in reply to Yanming Luo
    TI__Mastermind 18180 points

    Hi Yanming,

    Good Day. I would like to follow up about customer's query. Thank you very much.

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Guru** 116090 points

    Hi Ray,

    I have re-assigned this thread to MD-BLDC team, the expert of DRV8300 should reply to this question.

  • 0 in reply to Yanming Luo
    TI__Mastermind 18981 points

    +Thanks Yanming

    Hi Ray,

    We are looking into this and will follow up shortly 

    Best Regards,

    Andrew 

  • 0 in reply to Andrew Liu
    TI__Mastermind 18180 points

    Hi Andrew,

    Good Day. I would like to follow up about customer's query. Thank you very much.

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Mastermind 18981 points

    Hi Ray,

    We are still looking into this, and I will follow up with the team again soon.

    Will try to have an answer within 1-2 days about what's exactly causing the overcurrent at motor startup,
    and will see if there's anything that can be done from a motor setting perspective to resolve this issue. 

    Best Regards,
    Andrew

  • 0 in reply to Ray Vincent Aranzaso
    TI__Mastermind 18981 points

    Hi Ray,

    I am still following up on this further within the motor drives team, but I do have some comments and questions to help debug the situation: 

    • In your comments, I noticed that the GVDD voltage went from 41.5 all the way down to 25.1V during the problems experienced in operation.
      • Based on that info, it seems like something is sourcing a very high amount of current from the power supply and Vdrain bus, causing the voltage to dip significantly.
      • this high amount of current is also possibly triggering the OCP fault, like mentioned 
    • I am consulting my team members further to see if any of the settings you mentioned may be causing the problem. 

    Questions: 

    1. For the debug, is your motor currently connected? 
      1. I suggest that you try keeping the motor wiring disconnected for now, and confirm that the DRV device can operate with an open-load first (apply INHx/INLx waveforms accordingly, and see if there are any problems toggling the gate drive outputs) 
      2. during open-load operation, do you observe any other problems, like fault flags? 
    2. Can you tell us a bit more about the power supply that you are using to generate PVDD? 
      1. is it a battery, or a bench power supply? 
      2. we would like to understand if there is a current clamp in your power source, and if so - what current limit threshold the bench supply might have been set at
    3. what level of current are you observing at the motor phases? (SHx) 
      1.  is it possible to get a few waveforms captured on the oscilloscope?
    4. Also, can you share some information about the motor that you are trying to drive?
      1. knowing more about the motor specifications can help us understand what's causing so much current to be drawn from the Vdrain bus in this case 

    Best Regards,
    Andrew

  • 0
    TI__Mastermind 26046 points

    Hi Ray,

    Do you still need help on this thread?

    Thanks,
    Aaron

  • 0 in reply to Ray Vincent Aranzaso
    TI__Mastermind 18981 points

    Hi Ray,

    Please let us know if there is any additional help needed from us on this - or if the problem has already been resolved

    Best Regards,

    Andrew

  • 0 in reply to Andrew Liu
    TI__Mastermind 18180 points

    Hi Andrew,

    Good Day. Still waiting for the response from the customer. I will inform you by next week. Thank you very much.

    Best Regards,

    Ray Vincent

  • 0 in reply to Ray Vincent Aranzaso
    TI__Mastermind 18981 points

    Thanks Ray

    appreciated on the update on this, and hope you have a nice day

    Best Regards,
    Andrew