How real electric motors work - School of Physics - The University of ...
How real electric motors work - School of Physics - The University of ...
How real electric motors work - School of Physics - The University of ...
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UNIVERSITY OF NEW SOUTH WALES - SYDNEY - AUSTRALIA<br />
8. <strong>The</strong> infamous "ball bearing" motor<br />
This motor is nothing more than a shaft supported by two ball bearings. Current is fed to the outside<br />
<strong>of</strong> one bearing, runs through the shaft, and out the other bearing. It sometimes needs a little kick to<br />
get it started, but once turning will run equally well in either direction.<br />
Advantages:<br />
• Perfect conversation-starter at parties<br />
• Creates confusion amongst engineers<br />
Disadvantages:<br />
• Completely useless<br />
• Requires staggeringly high currents to make it turn<br />
This motor has no windings, brushes, magnets, and cannot possibly <strong>work</strong>. Except that it does. Click<br />
here (URL) for an explanation.