So, I've been wondering what way to go to reach extreme performance in e-applications. For me the logical way is a gearbox and some very high rpm's.
I've found a material witch I think enables this performance. It has a permeabillity of 600k (normal electrical steel is around 4k), a core loss of 0.3W per kg (40% of electrical steel grade M3) at 60hz - this is a spec sheet.
It comes extremely thin (0,9mils), punching and annealing would be a massive undertaking - but you would be left with 'the best of the best'. Sheets come in a width of a maximum of 8,4 inch - making quite large stators possible. And, could you anneal the whole stator in one piece - or would you need the individual parts to be annealed different ways? Annealing stil puzzles me some...
I haven't done much math on core materials, so if anyone could chime in if this is a no go or not - that would be great As I understand it, the high permeabillity of the material allows for more copper inside the stator. The relatively low saturation limit of 1,5T is a obstacle hi-rpm surely would beat
As for laminations between steel sheets, is kapton useable? Or is there another material that is preffered?
Just throwing it out here, I'm sure some will be intrigued I do not have the skills to 'reinvent' the motor, but I'm sure some of you do!
I've found a material witch I think enables this performance. It has a permeabillity of 600k (normal electrical steel is around 4k), a core loss of 0.3W per kg (40% of electrical steel grade M3) at 60hz - this is a spec sheet.
It comes extremely thin (0,9mils), punching and annealing would be a massive undertaking - but you would be left with 'the best of the best'. Sheets come in a width of a maximum of 8,4 inch - making quite large stators possible. And, could you anneal the whole stator in one piece - or would you need the individual parts to be annealed different ways? Annealing stil puzzles me some...
I haven't done much math on core materials, so if anyone could chime in if this is a no go or not - that would be great As I understand it, the high permeabillity of the material allows for more copper inside the stator. The relatively low saturation limit of 1,5T is a obstacle hi-rpm surely would beat
As for laminations between steel sheets, is kapton useable? Or is there another material that is preffered?
Just throwing it out here, I'm sure some will be intrigued I do not have the skills to 'reinvent' the motor, but I'm sure some of you do!