For injection molded magnets pole shape can have an essential impact on their final performance in magnetic sensor applications, electrical machines or other. In a magnetic path sensor e.g. the choice of the right pole shape can have a large influence on the grade of its linearity and finally on its costs. The presentation will first show the physical principles how magnetic poles originate magnetic fields around a permanent magnet, and which aspects have to be considered to design different pole shapes. There will then be presented various sorts of magnets as well as assemblies for their manufacturing to get advantageous results for different situations and customer demands. There will also be shown how to design such systems by FEM, which is usually a sequence of several simulation steps, starting with the manufacturing tools and ending with the magnets application.
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