 Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me. |
Forum Index : Electronics : What would be the Net outcome?
| Author | Message | ||||
| Kamak Senior Member  Joined: 13/04/2021 Location: CanadaPosts: 150 |
With a BLDC motor with a permanent magnet rotor. What would be the predicted magnetic field characteristic of a combination of magnetic pole-pieces arranged as N|SN|S|N|S....with Mu metal spacers between the magnetic pole pieces? Would there possibly be any peak-peak power loss mitigation? First and foremost, there are many types of Mu metal compositions used for a variety of different applications. Finding any candidate to create the best polarity distinction between each magnet, would have to be investigated, before even beginning to ask the question: "Is there a cost-benefit, is there any benefit?". From my limited knowledge of magnetic behavior, two magnetic polar axes in parallel and aligned with opposite polar faces flush with one another, make the field lines, between said poles, "join" together. Putting Mu metal with high magnetic susceptibility between said magnets probably would do nothing beneficial. Unless there is something I cannot see. I was originally thinking that the Mu metal spacer would "cut/separate" the magnetic field lines between said magnets, driving them through the Mu metal plane. What about magnetic poles of like polarity, in the above mentioned arrangement, with Mu metal between them? Aside from the use of high permeable metal spacers between magnets. I'm really trying to find a way to maintain the highest flux density centerline (the peak amperage production point) of each opposing magnetic pole piece, around the rotor. Spacing in general can do this. The gauss strength of the magnets can help. I read that Tesla uses segmented magnets, I believe for this purpose, or maybe it's for some other reason. Edited 2021-04-30 07:06 by Kamak |
||||
| Kamak Senior Member Joined: 13/04/2021 Location: CanadaPosts: 150 |
"Less eddy current loss means less heat and less waste. Designers in the aerospace, automotive, motorsport, and industrial markets are turning to laminated rare earth magnets, and are working to balance the tradeoff between power and heat." https://www.arnoldmagnetics.com/products/l-type-laminated-magnets/ Edited 2021-04-30 07:37 by Kamak |
||||
 Print this page |
