SLYA079 November   2023 TMAG5170D-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Diametric Magnet Approach
    1. 2.1 Errors and Redundancy for Diametric Magnet Approach
    2. 2.2 Sensor Offset Results
    3. 2.3 Magnet Tilt Results
    4. 2.4 Magnet Offset Results
    5. 2.5 Magnet Diameter Results
  6. 3Axial Magnet Approach
    1. 3.1 Errors and Redundancy for Axial Magnet Approach
    2. 3.2 Offset Results
  7. 4Summary
  8. 5References

2.1 Errors and Redundancy for Diametric Magnet Approach

The conditions for the subsequent data are defined in Table 3-2. Data was collected through the Texas Instruments Magnetic Sense Simulator (TIMSS) tool and post processed in excel. With mechanical assembly, there is the possibility that the sensing device can be offset from the intended location, the magnet tilted, or the magnet can not be correctly centered on the axis of rotation. Consequently, multiple separate tests were performed to see the impact of each of these possible error sources.

All parameters in Table 3-2 correspond to input parameters available in the TIMSS tool in Table 3-2.

Table 2-1 Simulation Parameters
Simulation Parameter in TIMSS Die Configuration Test TIMSS Simulation Parameter Value
Magnet Shape Both All Diametric Cylinder
Poles Both All 2
Magnet Both All Sintered Neodymium, N42
Outer Diameter Both Sensor Offset, Magnet Tilt, Magnet Offset, Diameter Tests 12.7 mm
Diameter tests 6 mm, 8 mm, 12.7 mm
Height Both All 3.175 mm
Magnet Position Both Sensor Offset, Magnet Tilt, Diameter Tests x = 0 mm, y= 0 mm, z = 0 mm
Magnet Offset Test x = 0 to 2-mm steps of 0.5 mm, y= 0 mm, z = 0 mm
Magnet Angle Both Sensor Offset, Magnet Offset, Diameter Tests x = 0 ° y= 0 °, z = 0 °
Magnet Tilt Test x=0° to 20° steps of 5°, y=0° , z=0°
Arc Length Both All 360 °
Sensor Position x Stacked-die Sensor Offset X offset -1.5 mm to 1.5 mm, steps of 0.1 mm
Sensor Y Offset, Magnet Tilt, Magnet Offset, Diameter Tests 0 mm
Side-by-side die Sensor Offset X offset -1.96 mm to 1.04 mm for one Hall element and -1.04 to 1.96 for the other Hall element, steps of 0.1 mm
Sensor Y Offset, Magnet Tilt, Magnet Offset, Diameter Tests -0.46 mm, 0.46 mm
Sensor Position y Both Sensor X-offset, Magnet Tilt, Magnet Offset, Diameter Tests 0 mm
Sensor Y-Offset Test -1.5 mm to 1.5 mm, steps of 0.1 mm
Sensor Position z Stacked-die Sensor Offset Tests -2.9385 to -4.9385 for one Hall element and -3.0615 to -5.0615 for the other Hall element, steps of 1 mm
Magnet Tilt and Magnet Offset Tests -4.0615 mm, -3.9385 mm
Side-by-side die Sensor Offset Tests -3 mm to -5 mm, steps of 1 mm
Magnet Tilt and Magnet Offset Tests -4 mm