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MCF8316AEVM: No-fault stall

Kevin Tritz
Prodigy 20 points
Part Number: MCF8316AEVM

After manually entering in the motor parameters (MPET seems to get them wrong), I'm able to get my BLDC motor spinning. I can play around with the various acceleration and other parameters and they seem to do as expected. However, while running quite often the motor will just stall/stop in the closed_loop_unaligned or closed_loop_aligned status without showing any fault status. There doesn't appear to be any way to force it back into the motor_idle status, so I have to reboot the eval board just to get things working again. Any idea what could be going wrong? I'm using this motor: http://www.jdpowersky.com/en/p-info.aspx?cid=1&id=49 and I've attached the register file (I think, no way to tell after drag&drop).

Thanks,

Kevin

  • 0
    Prodigy 20 points 

    {
  "signature": "oneui-register-data",
  "data": [
    [
      {
        "idx": 0,
        "id": "isd_config",
        "value": "0x44638C20"
      },
      {
        "idx": 1,
        "id": "rev_drive_config",
        "value": "0x281AF064"
      },
      {
        "idx": 2,
        "id": "motor_startup1",
        "value": "0x4B6907CA"
      },
      {
        "idx": 3,
        "id": "motor_startup2",
        "value": "0x24CE6008"
      },
      {
        "idx": 4,
        "id": "closed_loop1",
        "value": "0x0C2980BC"
      },
      {
        "idx": 5,
        "id": "closed_loop2",
        "value": "0x1AADE1B8"
      },
      {
        "idx": 6,
        "id": "closed_loop3",
        "value": "0x29800002"
      },
      {
        "idx": 7,
        "id": "closed_loop4",
        "value": "0x64D905A0"
      },
      {
        "idx": 8,
        "id": "speed_profiles1",
        "value": "0x00000000"
      },
      {
        "idx": 9,
        "id": "speed_profiles2",
        "value": "0x00000000"
      },
      {
        "idx": 10,
        "id": "speed_profiles3",
        "value": "0x00000000"
      },
      {
        "idx": 11,
        "id": "speed_profiles4",
        "value": "0x00000000"
      },
      {
        "idx": 12,
        "id": "speed_profiles5",
        "value": "0x00000000"
      },
      {
        "idx": 13,
        "id": "speed_profiles6",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "fault_config1",
        "value": "0x1DB2802E"
      },
      {
        "idx": 1,
        "id": "fault_config2",
        "value": "0x54000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "pin_config",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "device_config1",
        "value": "0x10100001"
      },
      {
        "idx": 2,
        "id": "device_config2",
        "value": "0x00009000"
      },
      {
        "idx": 3,
        "id": "peri_config1",
        "value": "0x40000000"
      },
      {
        "idx": 4,
        "id": "gd_config1",
        "value": "0x00000103"
      },
      {
        "idx": 5,
        "id": "gd_config2",
        "value": "0x00200000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "ana_trim3",
        "value": "0x48004800"
      },
      {
        "idx": 1,
        "id": "ana_trim4",
        "value": "0x00000000"
      },
      {
        "idx": 2,
        "id": "ana_trim5",
        "value": "0x80000013"
      },
      {
        "idx": 3,
        "id": "ana_trim6",
        "value": "0x00000000"
      },
      {
        "idx": 4,
        "id": "ana_trim7",
        "value": "0x00000000"
      },
      {
        "idx": 5,
        "id": "ana_trim8",
        "value": "0x00004424"
      },
      {
        "idx": 6,
        "id": "ana_trim9",
        "value": "0x8091C6DE"
      },
      {
        "idx": 7,
        "id": "ana_trim10",
        "value": "0xD36C113D"
      }
    ],
    [
      {
        "idx": 0,
        "id": "int_algo_1",
        "value": "0x00B3207D"
      },
      {
        "idx": 1,
        "id": "int_algo_2",
        "value": "0x00000167"
      }
    ],
    [
      {
        "idx": 0,
        "id": "gate_driver_fault_status",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "controller_fault_status",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_status",
        "value": "0x3F9AFFF0"
      },
      {
        "idx": 1,
        "id": "mtr_params",
        "value": "0x00000000"
      },
      {
        "idx": 2,
        "id": "algo_status_mpet",
        "value": "0x0A000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "dev_ctrl",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_ctrl1",
        "value": "0x7FFF0000"
      },
      {
        "idx": 1,
        "id": "algo_ctrl2",
        "value": "0x00000000"
      },
      {
        "idx": 2,
        "id": "current_pi",
        "value": "0x0000F184"
      },
      {
        "idx": 3,
        "id": "speed_pi",
        "value": "0x00000000"
      },
      {
        "idx": 4,
        "id": "dac_1",
        "value": "0x00000000"
      },
      {
        "idx": 5,
        "id": "dac_2",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algorithm_state",
        "value": "0x00200008"
      },
      {
        "idx": 1,
        "id": "fg_speed_fdbk",
        "value": "0x7FFFFFFF"
      },
      {
        "idx": 2,
        "id": "bus_current",
        "value": "0x0021D460"
      },
      {
        "idx": 3,
        "id": "phase_current_a",
        "value": "0x00000000"
      },
      {
        "idx": 4,
        "id": "phase_current_b",
        "value": "0x00000000"
      },
      {
        "idx": 5,
        "id": "phase_current_c",
        "value": "0x00000000"
      },
      {
        "idx": 6,
        "id": "csa_gain_feedback",
        "value": "0x00010003"
      },
      {
        "idx": 7,
        "id": "voltage_gain_feedback",
        "value": "0x00000001"
      },
      {
        "idx": 8,
        "id": "vm_voltage",
        "value": "0x02C24000"
      },
      {
        "idx": 9,
        "id": "phase_voltage_va",
        "value": "0x00000000"
      },
      {
        "idx": 10,
        "id": "phase_voltage_vb",
        "value": "0x00000000"
      },
      {
        "idx": 11,
        "id": "phase_voltage_vc",
        "value": "0x00000000"
      },
      {
        "idx": 12,
        "id": "sin_commutation_angle",
        "value": "0x00000000"
      },
      {
        "idx": 13,
        "id": "cos_commutation_angle",
        "value": "0x00000000"
      },
      {
        "idx": 14,
        "id": "ialpha",
        "value": "0x00000000"
      },
      {
        "idx": 15,
        "id": "ibeta",
        "value": "0x00000000"
      },
      {
        "idx": 16,
        "id": "valpha",
        "value": "0x00000000"
      },
      {
        "idx": 17,
        "id": "vbeta",
        "value": "0x00000000"
      },
      {
        "idx": 18,
        "id": "id",
        "value": "0x00000000"
      },
      {
        "idx": 19,
        "id": "iq",
        "value": "0x00000000"
      },
      {
        "idx": 20,
        "id": "vd",
        "value": "0x00000000"
      },
      {
        "idx": 21,
        "id": "vq",
        "value": "0x00000000"
      },
      {
        "idx": 22,
        "id": "iq_ref_rotor_align",
        "value": "0x00000000"
      },
      {
        "idx": 23,
        "id": "speed_ref_open_loop",
        "value": "0x00000000"
      },
      {
        "idx": 24,
        "id": "iq_ref_open_loop",
        "value": "0x00000000"
      },
      {
        "idx": 25,
        "id": "speed_ref_closed_loop",
        "value": "0x03A456B8"
      },
      {
        "idx": 26,
        "id": "id_ref_closed_loop",
        "value": "0x00000000"
      },
      {
        "idx": 27,
        "id": "iq_ref_closed_loop",
        "value": "0x00000000"
      },
      {
        "idx": 28,
        "id": "isd_state",
        "value": "0x00000000"
      },
      {
        "idx": 29,
        "id": "isd_speed",
        "value": "0x00000000"
      },
      {
        "idx": 30,
        "id": "ipd_state",
        "value": "0x00000000"
      },
      {
        "idx": 31,
        "id": "ipd_angle",
        "value": "0x00000000"
      },
      {
        "idx": 32,
        "id": "ed",
        "value": "0x00000000"
      },
      {
        "idx": 33,
        "id": "eq",
        "value": "0x00000000"
      },
      {
        "idx": 34,
        "id": "speed_fdbk",
        "value": "0x03DD5C05"
      },
      {
        "idx": 35,
        "id": "theta_est",
        "value": "0x00000000"
      }
    ]
  ]
}

    Here's the register JSON

  • 0 in reply to Kevin Tritz
    TI__Mastermind 24405 points

    Kevin,

    Can you check if you have auto-read register enabled in the GUI? If you are auto-reading registers while the motor is spinning, device might get stuck in unknown state. This is a known issue and we will be fixing this in our next revision. 

    Regards,

    Vishnu

  • 0 in reply to Vishnu Balaraj
    Prodigy 20 points

    No, I have enabled auto-read motor status and auto-read faults, but not auto-read registers.

  • +1 in reply to Kevin Tritz
    TI__Mastermind 24405 points

    Kevin,

    Please disable auto-read motor status and auto-read faults and try again. This should help fix the issue. 

    Regards,

    Vishnu 

  • 0 in reply to Vishnu Balaraj
    Prodigy 20 points

    So far that seems to have fixed the problem. Is this related to too much I2C activity, or is there something specific in the GUI program? If I have an MCU polling the controller for motor status will I encounter the same problem?

  • 0 in reply to Kevin Tritz
    TI__Mastermind 24405 points

    Kevin,

    This is related to too much I2C activity in the device. You will see the same problem when you use external MCU to ping the device. This is a known issue and we will be fixing this in our next revision. 

    Regards,

    Vishnu