Quote:
Originally Posted by littlegiant
Does this mean that Air core motors suffer no iron loss since there is no iron cores in them?
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Even being an air core motor, there is still iron in them, as a magnetic shield around the stator, which is magnetically coupled to the winds that are contained therein. The rotors of a cheap motor will also be one piece, non-sintered, which also are doomed to the same eddy currents as a crappy non laminated iron stator core, which heats up the rotor. Because the rotor is not directly thermally coupled to anything for active cooling, they just heat up and heat up, and this is another reason why feiago's cannot typically run very long without over heating or burning up. They need heatsiking and fans, which not very many people here like to use.
