stunthanger.com
Electric Stunt => Gettin all AMP'ed up! => Topic started by: Tim Wescott on February 15, 2013, 01:05:30 PM
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I thought folks might be interested in seeing how the internals of a motor works.
Here's an animation of a 4-pole outrunner turning (you have to click on the thumbnail for the animation to start up). The outer arcs are the business ends of the permanent magnets, the oddball-shaped inner pieces is the armature. Red means a north pole, blue means a south pole, gray means an armature segment isn't energized.
Study it for a while, and you'll see that each armature segment switches polarity in a way that means it's always pulling a permanent magnet in the right direction to make the motor spin -- this is how the motor generates the torque it needs to keep the prop going.
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Good one Tim, thanks!
I did my own variation of "Outrunner animation" the other night at the Indy Sportliners Club meeting. I was doing an intro-talk on electrics, with the motor running I was cranking up the throttle pot, tryig to show the range of the throttle. Unfortunately I did not have the prop TIGHT enough and..... well it was animated for a few moments!
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I'll bet that some of the audience were pretty animated, too, for a bit.
That's one way to encourage the audience to pay attention.