High frequency low rpm motors?

[maydaverave]

Anyone know anything about the new high performance transmissionless electric motors from kmd?
http://www.earthtimes.org/articles/show/leading-vietnamese-scooter-manufacturer-selects-kmarsquos-high-performance-electric-motor,690240.shtml

 

[fechter]

Interesting.

sounds like they're using ferrite cores instead of laminated iron.
Something I have suggested in the past.

More info here:http://www.kldmotorsamerica.com/

 

[georgeycc]

sounds like they're using ferrite cores instead of laminated iron

i've also been puzzled with this idea, why all dc/dc converters use ferrite core inductors rather than steel inductors?
what i guessed was that ferrite cores are more efficient/less lossy but get easily saturated??