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Old 07-01-2021, 07:30 AM   #1 (permalink)
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Post-assembly magnetization of rare-earth fractional-slot surface permanent-magnet machines using a two-shot method By David Dorrell

"This paper has addressed a method of magnetizing rare-earth surface-magnet motors when assembled, and it has been validated experimentally. With the increasing focus on these types of machine, it needs to be emphasized that it is very important to investigate magnetization methods for these machines. The preferred production method is unmagnetized assembly due to the problems in handling and working with strong magnetized magnets; however, most prototyping of rare-earth magnet machines use pre magnetized magnets. The work in this paper highlights that both methods can be used to produce the same results provided that the magnetization current requirements are accurately assessed and used. Further work would be to investigate additional motor topologies using this method including interior permanent motors to assess the impact of multi pulse magnetizing. Some fractional-slot motors may need even more than two pulses for successful magnetization. Harmonics regulation is another possible topic of future research. However, the method described here is simple but has been found to be effective."
~DD~



What a useful tool for segmented pm production in a machine....there is an entire line to this work this is just 1 part of the work.

The tested machine was a 6 pole 9 slot 37x70 stack IPM

This was proprietary information no vendor has ever provided. Know how is taught so to be told you have none by someone bounded by cash not to teach you then you see the real value in such vendors ridiculous mention of their proprietary tech in a DIY section.

Regards
Hubert
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Last edited by 1BOHO; 07-02-2021 at 10:23 AM..
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Old 08-07-2021, 11:06 AM   #2 (permalink)
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