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Original question:

DRV5032: DRV5032

DRV5032: How to select the right magnetic steel for Hall effect sensor

Lin_Charles
Expert 4260 points
Part Number: DRV5032
Other Parts Discussed in Thread: DRV5012

Hi team,

   I want to use this product to measure the speed of the motor (like an encoder). Could you please help me solve below questions,

  • How to choose the right magnets for this products? Do you have some recommend parts for this device? 
  • If I want to realize low power consumption application, do we have some other products to realize this requirement?
  • Do we have related TIDA to demo this device how to measure motor speed?

Thank you very much!

  • 0
    TI__Mastermind 26195 points
    Hello Charles,

    Thank you for using the TI forum. A helpful resource for you is one of our FAQ posts about Hall Effect Sensors, which can be found at: e2e.ti.com/.../355909

    We do not have specific recommended magnets, but the above FAQ post has a list of some various magnet suppliers. In general, you can use a magnetic field calculator to help determine if your chosen magnet is a good fit for your specific sensor. The magnetic field calculator on the DRV5032 product page (www.ti.com/.../DRV5032) will even show you distance results for each version of the device. The above mentioned FAQ post also has a link to another magnetic field calculator.

    The FAQ post mentioned above also has a list of our various Hall Effect devices. I recommend looking over these devices to make sure that the one you choose can fit your power needs as well as your timing needs. As long as these devices can sample quickly enough for you, some of our ultra-low power devices are the DRV5032 (switch) and the DRV5012 (latch).

    The FAQ post also has a list of the TI reference designs that use Hall sensors. A few of these examples have motors in them, but may or may not be what you are looking for. If you are specifically looking for an encoder design, then the “Incremental Rotary Encoder” design may be helpful to you (www.ti.com/.../TIDA-00480).