Force on armature in soleniod if it is a magnet

ccurtis

Well-Known Member

• Oct 29, 2017

• #1

I'm wondering if the force on solenoid armature is greater if the armature is a magnet instead of iron or ferrite, all else being equal and how to quantify any difference.

 

cowboybob

Well-Known Member

Most Helpful Member

• Oct 30, 2017

• #2

Yes, it is.

But not easy to quantify...

For a solenoid without a PM armature, see this "Recent Trends in Engineering and Technology" paper.

For a solenoid with a PM armature, see this "applied sciences" paper, starting at the end of page 3 ("Biot-Savart law") and running through page 5.

Have fun .

 

alec_t

Well-Known Member

Most Helpful Member

• Oct 30, 2017

• #3

The force will be modified, but whether it is increased or decreased will depend on the relative polarities and geometry of the magnet and the solenoid field.

 

ccurtis

Well-Known Member

• Oct 30, 2017

• #4

Thanks cowboybob! I only scanned the link about the magnet armature, but it answers the first part of my question and certainly leads me to the second part. My search didn't find anything on the topic.

alec-t., granted the plunder would have to installed in the proper orientation for increased force.

 

C

Colin

Active Member

• Nov 26, 2017

• #5

A magnetic armature gives push-pull