Interesting Motor -- Only the Brushes Rotate

Author Topic: Interesting Motor -- Only the Brushes Rotate (Read 6465 times)

Matt Watts	Interesting Motor -- Only the Brushes Rotate « on: 2014-12-25, 08:00:19 »
Group: Guest	Skip out to about 3 hours, 54 minutes to see where they run this thing up. https://www.youtube.com/watch?v=FwgwW7sZmzY Uses slip rings to transfer power to the main brushes. Only the main brushes rotate, not the armature. Very screwy and I wouldn't think it would even run. Maybe I'm not looking at it right, but it's sure interesting.

BEP	Re: Interesting Motor -- Only the Brushes Rotate « Reply #1 on: 2014-12-25, 14:12:58 »
Group: Guest	Quote from: Matt Watts on 2014-12-25, 08:00:19 Skip out to about 3 hours, 54 minutes to see where they run this thing up. https://www.youtube.com/watch?v=FwgwW7sZmzY Uses slip rings to transfer power to the main brushes. Only the main brushes rotate, not the armature. Very screwy and I wouldn't think it would even run. Maybe I'm not looking at it right, but it's sure interesting. Interesting way to check for shaft power Imagine doing that to a conventional motor that large Two points for brush resistance for each conductor, no energy stored in rotor momentum, relying only upon the Lorentz force for rotation? Are they trying to turn the calendar back on motor design to the beginning? -- Something must rotate. If you lock the rotor and the stator then the commutator must see the rotational force. This is true for almost any brushed motor. I've seen generators and motors after self-destruction where the bearings were the only thing that rotated and melted in the process.