Questions about electromagnetic forces.

[Rick_Stiles]

Hi all,

I want to start off by saying that I am not too good with physics, so while explaining, if terms could be kept simple I would really appreciate it. :)

Here are my questions:

Can an electromagnet repel a permanent magnet with any significant amount of force? My target is around 175psi of force. Can this be done using magnets?

Furthermore, I need to move the permanent magnet 3". Is this possible?

Also, is there a limit to how quickly an electromagnet can be pulsed? I need things to be instant like a light switch.

I hope I asked my questions in a clear manner, but if anything isn't understood, feel free to ask for clarification.

Thanks a ton :)

 

[lzkelley]

Sounds very clear. The only limit to the repulsive force is the size of the magnetics / how much current you can provide to the electromagnet (there are also material issues, like the electromagnet melting... but you prolly won't have to worry about that).
175psi is a lot of force, so it would take a lot of power.. but its doable. As is 3".

It couldn't be "instant," but it would be very fast.. like hundredths of a second or less.