[Electric Boats] motors with improved efficiency

 

http://myownhybrid.files.wordpress.com/2008/01/holm-modelling-and-optimization-of-a-permanent-magnet-machine-in-a-flywheel.pdf

up to 98% efficiency in motor using Halbach array. This is versus the 70 odd percent efficiency of the motor you have.

If this interests you Google CSIRO halbach device as well as other combinations.. Would be nice to get nearly 1/3 more range with the same battery bank wouldn't it?

 

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