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Choosing the Right Magnet Material for Electric Motor Design

Thursday, October 6, 2022

Various types of magnet material options are available for electric motor design with different performance characteristics. Some magnets retain their magnetism once they have been magnetized whereas some magnets tend to lose that effect once the magnetic field is removed. While designing a magnet-assisted electric motor, several factors have to be considered such as magnetic strength required, operating temperatures, exposure to corrosive and demagnetizing conditions, cost, etc. Hence the performance and affordability of magnets make them important components for many industrial and technological applications. Therefore, choosing the right magnet material for your application becomes a challenging task.
In this webinar, we will take a look at the different types of magnets and their characteristics. We will design a surface-mounted magnet motor with a ferrite or ceramic magnet, samarium cobalt (SmCo) magnet, and neodymium (NdFeB) magnets using the virtual prototyping tool EMWorks2D. We shall study each topology and show its performance results, including cogging torque, back EMF, electromagnetic torque, coil flux linkage, losses, and magnetic flux distribution; a comparison of the peak torque density realized by each topology will also be discussed.

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