Reducing Cogging Torque
A summary of techniques used for reducing cogging torque:
- Skewing stator stack or magnets
- Using fractional slots per pole
- Modulating drive current waveform
- Optimizing the magnet pole arc or width
Almost all the techniques used against cogging torque also reduce the motor counter-electromotive force and so reduce the resultant running torque.
A slotless permanent magnet motor does not have any cogging torque.
Read more about this topic: Cogging Torque
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