TMAG5170: TMAG5170

Hi Milos,

Thanks for posting to the Sensors forum and welcome to E2E.

We do have a tool to help with this--our online magnetic simulation tool, TI Magnetic Sense Simulator (TIMSS). You can access TIMSS here: https://webench.ti.com/timss/ 

You can start a new design by clicking "Create new design", then select the desired function and magnet shape (for you I think this would be "Rotation" and "Diametric cylinder", then select the sensor (TMAG5170). In this design, the magnet will rotate around the Z axis.

Under the "Magnet" tab you can set the magnet specifications, shape, and motion. Under the sensor tab you can configure the sensor specifications and placement. Note that the TMAG5170 has two variants (A1 and A2) that offer different configurable magnetic ranges (25, 50, 100mT and 75, 150, 300mT).

You can name and save your simulation and export the input parameters or simulation results.

I've attached an example simulation setup with the TMAG5170A1 in an on axis orientation with the magnet parameters you shared. You can create your own design or start from the example. To import the example, simply click "Import design file" and select the .json file.

{
  "version": "3.1.3",
  "design_name": "TMAG5170_example",
  "magnet_id": 2,
  "poles": 2,
  "material_id": 7,
  "remanence": 1320,
  "temperature": 20,
  "temperature_coefficient": -0.12,
  "coercivity": 10.9,
  "function_id": 4,
  "magnet_geometry": {
    "outer_diameter": 3,
    "height": 0.6
  },
  "magnet_position": {
    "x_position": 0,
    "y_position": 0,
    "z_position": 0
  },
  "magnet_angle": {
    "x_angle": 0,
    "y_angle": 0,
    "z_angle": 0
  },
  "magnet_movement": {
    "arc_length": 360
  },
  "sim_setting": {
    "angular_step_size": 1
  },
  "sensor": [
    {
      "sensor_id": "TMAG5170",
      "sensor_position": {
        "x_position": 0,
        "y_position": 0,
        "z_position": -5
      },
      "sensor_angle": {
        "x_angle": 0,
        "y_angle": 0,
        "z_angle": 0
      },
      "custom_inputs": {
        "variant": "TMAG5170A1QDGKR",
        "applied_vcc": 3.3,
        "temperature_compensation": 0,
        "averaging": 1,
        "maximum_input": 25
      },
      "id": -1
    }
  ]
}

Hope this helps and please let me know if you have additional questions.

Best regards,

Jesse

Hi Jesse,

Thank you for your response. In my case the magnet not only spins around its z axis but it also moves in the x,y plane. Please see the image attached. 
Is there a way to model this behavior in your tool?

Best,
Milos

Hey Milos,

Yes, this will also work with the "Rotation" function. If you offset the magnet from the global Z axis by moving its initial position in the XY plane, the magnet itself still rotates around the global Z axis (as opposed to its own Z axis), which would create the type of motion shown in your image. You can center the sensor at the origin.

Best regards,

Jesse

Thanks Jesse, this helped! I managed to run the simulation but I'm not sure if I fully understand the results that the tool is showing. 

1) On the first graph I see that the B that the sensor sees is super small ~6m, even the smallest sensitivity of the sensor (+/-25mT) can't pick this up. Am I reading this well?
2) Can you please tell me what is Output Signal (Code) on the second graph?
3) Calculated angle seems to be off, the magnet is rotating from 0 to 110deg, am I missing something here?

Thank you!

Best,
Milos