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Designing a Disc Magnet for use with Infineon GMR Sensors

This application note introduces the concepts underlying the use of GMR sensors, including discussions on potential sources for errors and how to mitigate them. The application note then details the process of designing and analyzing a disc magnet for use with Infineon GMR sensors. The three main attributes to consider when selecting or creating a disc magnet are its material from which it is manufactured, its diameter, and its thickness. This application note describes a specific recommended disc magnet design using sintered SmCo5 material with a Br value of 0.9T, a diameter of 10mm, and a thickness of 1.7mm. The application note also provides the information necessary to analyze alternative disc magnet designs if required.

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903.29 KB
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15/10/2011