SBAA632 April   2024 TMAG3001 , TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5273

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Implementation and Testing
    1. 2.1 Build Configuration
    2. 2.2 Data Collection
    3. 2.3 Speed Calculation Methods
      1. 2.3.1 Continuous Sampling
      2. 2.3.2 Running Average
      3. 2.3.3 Zero-Crossing
      4. 2.3.4 Periodic Sampling
  6. 3Summary
  7. 4References

3 Summary

The implementation of back-bias magnetic sensing is useful for cases where it is not practical to use several magnets, and contact free sensing is required. This is particularly helpful in applications such as wheel and gear speed detection which is a helpful function that enables anti-lock braking (ABS), speedometers, and other power-train monitoring requirements for both e-bike and automotive systems.

In addition to back-biased magnetic sensing, inductive sense coils can also be designed an implemented with devices such as LDC0851 to track the proximity of rotating conductive surfaces. Application information can be found in the reference materials in Table 4-1.

For more information regarding magnetic sensing in e-bike and automotive applications, please refer to Table 4-1 and Table 4-2.