I can give you my point of view:scientists (and applied science) always looks *the use* of certain inventions, and not in-depth-view of what magnetic field is really.So, you have a rotating magnet inside a stator:voila, an alternator. You have a stator that creates a rotating magnetic field and inside it a "squirrel cage" rotor:voila, an asynchronous rotor.Without both the inventions, todays world would not exist. Imagine a refrigerator motor with brushes.Or a fan motor with them.Or generating electricity only with DC.Actually, the equations of Maxwell, describe an electromagnetic field, used to transmit TV and radio, and have nothing to do with pure magnetism (even in the more complex form of the rotating magnetic field).The magnetism...is something.
-- Dimitris Tzortzakakis,Iraklion Crete,Greece major in electrical engineering freelance electrician dimtzort AT otenet DOT gr Ï "Ken" Ýãñáøå óôï ìÞíõìá news:yLH5d.2351$ snipped-for-privacy@news20.bellglobal.com...