[参考译文] MCT8316A：电机负载推理

您好、

是的、负载越大、电流越大、有时速度也可能会下降。

在速度模式启用时会发生这种情况。  

谢谢、此致  

Venkatadri S.  

谢谢。 我在 DACOUT2（引脚 38）上监控“输入占空比“(0x40C)、并随电机负载波动。 我不会通过微控制器调整 SPEED 引脚上的 PWM 占空比、也禁用了 CONST_SPEED。 将 CONST_PWR 设置为“功率限制控制“。  
我现在的问题：由于数据表中没有输入占空比 0x40C 的信息、这是什么？ 为什么会随电机负载/扭矩波动？ 这是可取的、因为它可以很好地指示电机负载、但我需要了解它的工作原理。 谢谢。

您好、

我错过了该主题。

您能否验证是否启用了速度环路？ 如果是、占空比将根据负载/电源变化而变化

您可以共享 JSON 文件吗？

谢谢、此致  

Venkatadri S.  

您好、速度环路已禁用。 附件是 JSON 文件。

{
  "signature": "oneui-register-data",
  "data": [
    [
      {
        "idx": 0,
        "id": "isd_config",
        "value": "0x6F04C100"
      },
      {
        "idx": 1,
        "id": "motor_startup1",
        "value": "0x38D561F7"
      },
      {
        "idx": 2,
        "id": "motor_startup2",
        "value": "0x1BB999A4"
      },
      {
        "idx": 3,
        "id": "closed_loop1",
        "value": "0x0746B314"
      },
      {
        "idx": 4,
        "id": "closed_loop2",
        "value": "0x02A664D0"
      },
      {
        "idx": 5,
        "id": "closed_loop3",
        "value": "0x4CC40101"
      },
      {
        "idx": 6,
        "id": "closed_loop4",
        "value": "0x000CE944"
      },
      {
        "idx": 7,
        "id": "const_speed",
        "value": "0x00A00504"
      },
      {
        "idx": 8,
        "id": "const_pwr",
        "value": "0x177048C2"
      },
      {
        "idx": 9,
        "id": "150_deg_two_ph_profile",
        "value": "0x36DB6DA6"
      },
      {
        "idx": 10,
        "id": "150_deg_three_ph_profile",
        "value": "0x36DB6D80"
      },
      {
        "idx": 11,
        "id": "trap_config1",
        "value": "0x054BA106"
      },
      {
        "idx": 12,
        "id": "trap_config2",
        "value": "0x2A880000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "fault_config1",
        "value": "0x78F43025"
      },
      {
        "idx": 1,
        "id": "fault_config2",
        "value": "0x7446B809"
      }
    ],
    [
      {
        "idx": 0,
        "id": "gd_config1",
        "value": "0x18440008"
      },
      {
        "idx": 1,
        "id": "gd_config2",
        "value": "0x14000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "pin_config1",
        "value": "0x2D720602"
      },
      {
        "idx": 1,
        "id": "pin_config2",
        "value": "0x080C0000"
      },
      {
        "idx": 2,
        "id": "device_config",
        "value": "0x7FFF0000"
      },
      {
        "idx": 3,
        "id": "peri_config",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "ana_trim3",
        "value": "0x48004800"
      },
      {
        "idx": 1,
        "id": "ana_trim4",
        "value": "0x00000000"
      },
      {
        "idx": 2,
        "id": "ana_trim5",
        "value": "0x00000016"
      },
      {
        "idx": 3,
        "id": "ana_trim6",
        "value": "0x00000000"
      },
      {
        "idx": 4,
        "id": "ana_trim7",
        "value": "0x00000000"
      },
      {
        "idx": 5,
        "id": "ana_trim8",
        "value": "0x00005251"
      },
      {
        "idx": 6,
        "id": "ana_trim9",
        "value": "0x007DF85E"
      },
      {
        "idx": 7,
        "id": "ana_trim10",
        "value": "0x5374003A"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_reserved1",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "algo_reserved2",
        "value": "0x00000000"
      },
      {
        "idx": 2,
        "id": "algo_reserved3",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "gate_driver_fault_status",
        "value": "0x00000000"
      },
      {
        "idx": 1,
        "id": "controller_fault_status",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "sys_status1",
        "value": "0x00C3446E"
      },
      {
        "idx": 1,
        "id": "sys_status2",
        "value": "0xB0010000"
      },
      {
        "idx": 2,
        "id": "sys_status3",
        "value": "0x00000000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "device_ctrl",
        "value": "0x00008000"
      }
    ],
    [
      {
        "idx": 0,
        "id": "algo_ctrl1",
        "value": "0x00000000"
      }
    ]
  ]
}

尊敬的 Desmond：

感谢您发布 JSON、我将于今天验证并找回。

谢谢、此致  

Venkatadri S.  

尊敬的 Desmon

抱歉、有延迟、我查看了 JSON、其中闭环在 CONST_SPEED[CLOSED_LOOP_MODE]中被禁用。

这将是纯电压模式、相电流不会发生显著变化、这取决于电机的旋转速度、以及当速度降低的 BEMF 也会减小以及电流会因电机电阻而增大时。

为了调节扭矩、您在寄存器中启用电源环路、然后功率限制也生效。

谢谢、此致  

Venkatadri S.