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DRV10983: Motor spins for 3-5 secs and then stops causing fault code 1

chandrashekar Shetty
Prodigy 10 points
Part Number: DRV10983

Facing an Issue with DRV10983.

Iam able to read & write to the chip via i2C.

Issue -> motor starts to spin for 3-5 secs. then fault conditon [1 ] occurs and motor stops spinning. Again motor starts spining for 3-5secs and then its stops . this repeats. not able to fix the issue.

motor resistance of a coil -> RPH_CT -> 1.5

Kt -> 411 

Decimal values of the registers (0x21 to 0x2B)

 MOTORPARAM1 ->  74
MOTORPARAM2  -> 222
MOTORPARAM3  -> 58
SYSOPT1  -> 5
 SYSOPT2 -> 144
SYSOPT3 -> 253 
SYSOPT4 -> 137
SYSOPT5 -> 240
SYSOPT 16 -> 5
SYSOPT7 -> 249
SYSOPT8 -> 12
SYSOPT9 -> 14
  • 0
    TI__Mastermind 24415 points

    Hi Chandrashekar,

    Thanks for posting your question in MD forum and sharing the details. FaultCode 0x01 corresponds to current limit fault. Looking at the motor parameters, I'm suspecting your end application to be a low speed high torque motor such as ceiling fan/pedestal fan. Can you try following recommendations?

    1. Decrease the first order acceleration constant A1 to 0.9 Hz/sec.

    2. Change the AdjMode to "Full cycle"

    3. Change the lead time to 1.2m.

    4. Increase the lock detection current threshold to a value that is slightly higher than the rated current of the motor.

    5. Increase the dead time to 800 ns.

    Regards,

    Vishnu  

  • 0 in reply to Vishnu Balaraj
    Prodigy 10 points

    Thanks for the reply.

    Yes you are correct, my motor is low speed high torque motor .

    Change the lead time to 1.2m.  -- didn't get this parameter? do you mean motor commutate control advance?

    Increase the dead time to 800 ns. -- deadtime parameter bit is 4 bits. as per equation (n+1) *40 ns.  i can only go till 640 ns. how to achive 800ns any other parameter to be set for this?

    Rest of the parameters are changed and the motor is performing better from last time . it runs for 10 secs and then stops causing fault 1. 

     

  • 0 in reply to chandrashekar Shetty
    TI__Mastermind 24415 points
    chandrashekar Shetty said:
    Change the lead time to 1.2m.  -- didn't get this parameter? do you mean motor commutate control advance?

    Yes, the Commutation Control Advance Angle.

    chandrashekar Shetty said:
    Increase the dead time to 800 ns. -- deadtime parameter bit is 4 bits. as per equation (n+1) *40 ns.  i can only go till 640 ns. how to achive 800ns any other parameter to be set for this?

    Please set this to 640 ns.

    Regards,

    Vishnu

  • 0 in reply to Vishnu Balaraj
    TI__Mastermind 26046 points

    Hi Chandrashekar,

    Do you need assistance on this thread still? If not, please mark as resolved!

    Thanks,
    Aaron

  • +1 in reply to Aaron Barrera
    Prodigy 10 points

    Issue resolved .

    Issue was with hardware.