Equal surface fields? Different pull forces?

• Mar 29, 2013

• Thread starter
• #2

Vis99

Electrical

Mar 29, 2013

12

The pull force is next to the surface field (5754)
The force is in (lb).

 

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• Mar 29, 2013

• #3

RyreInc

Electrical

Apr 7, 2011

205

Physics.

The surface field is a flux density. The total flux is a product of the density and the area of the face.

https://en.wikipedia.org/wiki/Magnetic_flux

 

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• Mar 29, 2013

• Thread starter
• #4

Vis99

Electrical

Mar 29, 2013

12

What? I have no idea what you ment RyreInc
However, I seem to noticed that the force is dependent on the area, the larger the area the more space the flux line can pass and the force is greater.

 

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• Mar 29, 2013

• Thread starter
• #5

Vis99

Electrical

Mar 29, 2013

12

I also noticed that,
When the surface area of the magnet is = to the surface area of the other magnet or magnetic object, the magnetic force of attraction/repulsion is at its heights.

 

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• Mar 29, 2013

• Thread starter
• #6

Vis99

Electrical

Mar 29, 2013

12

Its greatest*

 

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• Mar 29, 2013

• #7

IRstuff

Aerospace

Jun 3, 2002

44,773

A calculation of the "pull" force relative to area*field strength show pretty reasonable results.

TTFN
faq731-376

Need help writing a question or understanding a reply? forum1529

 

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• Mar 29, 2013

• Thread starter
• #8

Vis99

Electrical

Mar 29, 2013

12

Is it safe to say, to utilize a magnets full force at a gap of 0... The area should be = or greater to the magnets area?

 

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• Mar 29, 2013

• #9

ndsram

Materials

Jul 17, 2006

35

One more thing, i would also like to mention in addtion to the reply in your other post. The magnetic force of attaction & repulsion will vary w.r.t the surface area of the magnet. If you have 2 different sized magnet with different volume or if same sized magnet with different magnetic material.

The force tend to change between magnet

 

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• Mar 30, 2013

• #10

Vis999

Electrical

Mar 30, 2013

7

Hey ndsram,
for some reason I got log into my account... So I made a new one.
The force between the magnets is a lot more complicated than what I've thought. Thats what I can say...

 

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• Mar 30, 2013

• #11

ndsram

Materials

Jul 17, 2006

35

Dear Vis99,

It is not so, the way in which you perceive is more important. Consider what are the criteria will affect for of a magnet.
Take a simple example and get into basic understanding.Lets take steel and magnet of area 10 mm^2 of both and volume be 1000 mm^3

Here are few
Distance between the magnet and steel
Grade of the steel
Grade of the magnet

Set ideal condition to compute force then try with diffrent option by varying parameters which you're interested

Reg
N D Ssenthil Ram

 

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• Mar 30, 2013

• #12

Vis999

Electrical

Mar 30, 2013

7

Hey ndsram,

I just noticed, that when I bought te magnets. They are rated at 5lb of force maximum.
I discovered, in order to get that MAX. force of 5lb the object has to be strongly magnetic and the surface area where the force is applied has to be equal to the magnet or greater and you find that force to be significant!

 

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• Mar 30, 2013

• #13

Vis999

Electrical

Mar 30, 2013

7

Ow yea also how thick that magnetic object is is important to utilize the MAXIMUM force.

 

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• Mar 30, 2013

• #14

ndsram

Materials

Jul 17, 2006

35

BY converging or diverging the flow of flux lines in a steel, the holding force may be determined. Try to see some example of holding magnet

 

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