Why don't magnetic motors work?

by dipole
Tags: magnetic, motors, work
dipole is online now
May5-12, 10:32 AM
P: 419
THIS IS NOT A POST ABOUT FREE ENERGY. I know this topic is against the rules, and I am not foolish enough to believe such a thing exists.

I just want to understand the root flaw in such a concept. I have two suspicions about why you can't use the repulsion of magnets (with no other source of input) to generate work.

The first is that its difficult (maybe impossible?) to find some configuration in which any net torque is actually produced. The second is that even if you could find some configuration in which a net torque is produced, the spinning of this wheel of magnets is going to induce currents, which generate heat, and act to demagnetize the magnets, causing your wheel to inevitably slow down.

How far off am I?
Phys.Org News Partner Physics news on Phys.org
The hemihelix: Scientists discover a new shape using rubber bands (w/ video)
Mapping the road to quantum gravity
Chameleon crystals could enable active camouflage (w/ video)
Borek is offline
May5-12, 10:47 AM
Borek's Avatar
P: 22,710
Quote Quote by dipole View Post
Yes it is. There is no free energy, so there is no way such a motor can work, regardless of the design. There is no need to discuss anything beyond this point.

Register to reply

Related Discussions
How do motors work? Introductory Physics Homework 6
Magnetic motors Classical Physics 1
Perendev Magnetic Motors General Discussion 20
Magnetic motors Mechanical Engineering 3
reduce magnetic radition from motors General Physics 2