Pros and cons of permanent magnet motors

[AB Hammer]

Greetings all
Pros and cons of permanent magnet motors

What uses will the permanent magnet motors have when we finish our discoveries?

What disadvantages would there be in industrial use?

How large can we make them before the magnetic field become more of a danger?

These questions I feel are in good timing to what we are doing. I can see allot of advantages in small application or magnet wheels, even up to car motors. But I see disadvantage to large industrial use. First getting magnets big enough and then the difficulty of using them or even making them ( basically dealing with them ). Imagine 2 strong magnets just 3 foot tall and you are having to place them in some equipment. The magnetic field would be massive and you have to think. What can it do to me, or what happens if they attract and you are in between them?

Just a little food for thought and I think good for discussion.

[Honk]

If we can build spaceships, large supertankers and other heavy duty devices, then the safe handling of big
supermagnets is entirely an engineering task. This will not be a limiting factor in design and production.

[AB Hammer]

Greetings Honk

The biggest problem with large magnets are, what do we have to do? And what kind of equipment will be able to work with them? It will be interesting on how it may be done.

Lets go hypothetical. A 1ton magnet that has a constant strong draw. What do we know of today that can lift it and move it around without getting stuck on it? Then we have to mount it in something. Are we going to have limits to what may be to hot to handle so to speak? Aluminum seems to be the best idea that I can think of, but just working with small magnets there is a problem keeping them from attracting to each other while working on a wheel. This is where the real problem comes in. IMO

PS I use to be in the Coast Guard and I have been ship yards as well. It is not as massive as one might think moving large tankers. It is the cranes and the moving platforms otherwise it is allot of men and women putting on one part at a time, like a large puzzle.

[utilitarian]

Greetings all
Pros and cons of permanent magnet motors

What uses will the permanent magnet motors have when we finish our discoveries?

What disadvantages would there be in industrial use?

How large can we make them before the magnetic field become more of a danger?

These questions I feel are in good timing to what we are doing. I can see allot of advantages in small application or magnet wheels, even up to car motors. But I see disadvantage to large industrial use. First getting magnets big enough and then the difficulty of using them or even making them ( basically dealing with them ). Imagine 2 strong magnets just 3 foot tall and you are having to place them in some equipment. The magnetic field would be massive and you have to think. What can it do to me, or what happens if they attract and you are in between them?

Just a little food for thought and I think good for discussion.

It seems to me that permanent magnets would only be useful in a few situations.  Yes, they can pull things together, but it takes an equal amount of energy to pull those things apart later.  Usually, an electromagnet is much more useful, because it can be turned off and on at will.

The problem is that we already have a constant force in place that needs to be overcome all the time.  That force is gravity.  Do we really need another one like that?

[Honk]

The problem is that we already have a constant force in place that needs to be overcome all the time.  That force is gravity.  Do we really need another one like that?

Gravity is a one way directional force, always pulling downwards on all subjects, no matter what.
You cannot arange the force of gravity into circular gradient force like within a magnetic wankel motor.
This is where magnets excel over gravity.