What type of core should I use?
What type of core should I use?
(OP)
Greetings,
So, what kind of core is best used in an electromagnet? Is it iron?
And is iron the ONLY material commonly used in electromagnets cores?
So, what kind of core is best used in an electromagnet? Is it iron?
And is iron the ONLY material commonly used in electromagnets cores?





RE: What type of core should I use?
Yes.
Yes. Or steel. Which is iron with carbon and sometimes a few more ingredients in low concentration.
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of core should I use?
RE: What type of core should I use?
I'm worried that if there is a magnet in the system. The electromagnet can't push it away, because the magnet is attracted to the iron/steel core...
RE: What type of core should I use?
Bill
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"Why not the best?"
Jimmy Carter
RE: What type of core should I use?
RE: What type of core should I use?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: What type of core should I use?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of core should I use?
Lets say we had a Solenoid, it can pull/push a magnet without the trouble of having the magnet attracted to the core.
Now, lets we add an iron/steel core. Its magnetized by the current around it. Why should the magnet be attracted to it? Even if the electromagnet is set to push it away. The magnet should be pushed regardless of the iron/steel core because its now magnetized to oppose the magnet.
RE: What type of core should I use?
Can the Solenoid be built in a way to = the Electromagnet?
RE: What type of core should I use?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of core should I use?
"I second Bill" wouldn't really help me understand much.
RE: What type of core should I use?
Apply a very small dc current with polarity to oppose the PM magnet flux. By "small", I mean not enough to reverse the PM-induced flux in the core. The magnet will still be attracted to the core.
Now increase to a large dc current, sufficient to reverse the flux in the core. The magnet will now be repelled.
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(2B)+(2B)' ?
RE: What type of core should I use?
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(2B)+(2B)' ?
RE: What type of core should I use?
RE: What type of core should I use?
Trying to compare between a Solenoid with and without the core.
RE: What type of core should I use?
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of core should I use?
When calculating the properties of electromagnets, one inch of magnetic path through a core of good transformer iron may be equal to 50,000 inches of magnetic path through air. Some solenoids, the ones used in magnetic contactors come to mind, are built with a small air gap in the magnetic circuit. The purpose is to reduce the flux density so that residual magnetism will not cause the contactor to stick closed.
But this forum is for professionals and you are asking second year electrical apprentice questions.
Bill
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"Why not the best?"
Jimmy Carter
RE: What type of core should I use?