Force produced by current carrying coil to move sludge(steel rod)

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Discussion Overview

The discussion revolves around calculating the force and lift required to move a steel rod (referred to as "sludge") using a current-carrying coil. Participants explore the relationship between the current in the coil and the resulting magnetic force, as well as the necessary equations to determine the lift and displacement of the rod.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant requests an equation for the lift of the steel rod that depends on the current flowing through the coil.
  • Another participant suggests searching for information on "solenoid force," indicating the complexity of the problem.
  • There is a clarification regarding terminology, with some participants noting that "slug" is a more common term than "sludge" for the object in question.
  • A participant expresses frustration over the focus on terminology rather than the technical assistance needed, emphasizing the need for help with the force and magnetic field calculations.
  • Participants reference external resources, such as Wikipedia articles on solenoids and electromagnets, in hopes of providing additional context or information.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the terminology used for the steel rod, nor do they agree on the specific equations or methods to calculate the required force and lift. The discussion remains unresolved regarding the technical details needed to address the original problem.

Contextual Notes

There are limitations in the discussion, including a lack of specific values for the current and the force exerted by the coil, as well as uncertainties about the magnetic field involved. The discussion also reflects varying levels of understanding and focus on terminology versus technical content.

rvb53
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hi everyone,

I have a problem, if U see the photo I have coil which carries current of rectified ac waveform through it. I have sludge(Steel rod of weight 20#) which has to be moved till the centre of the coil.

If the current in coil induces magnetic field to sludge to move upward, then what will be the force with which th sludge is going to move and I need the lift (or) displacement from its initial position to final position.

If possible, I need the equation for the lift of the sludge and which should depend on the current which flows in the coil.

If anybody wants the value of the current, I can give it...
pls do help me...I am struck in this problem from many days...
 

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Welcome to PF.
I've never heard a solenoid called sludge before.
Where does that come from?

Anyway its complicated, so I suggest Googleing -> solenoid force
and doing some reading.
 
NoTime said:
Welcome to PF.
I've never heard a solenoid called sludge before.
Where does that come from?

Anyway its complicated, so I suggest Googleing -> solenoid force
and doing some reading.

I think it is a typo. It's typically called the armature, but the slang version is slug, not sludge.

CS
 
rvb53 said:
hi everyone,

I have a problem, if U see the photo I have coil which carries current of rectified ac waveform through it. I have sludge(Steel rod of weight 20#) which has to be moved till the centre of the coil.

If the current in coil induces magnetic field to sludge to move upward, then what will be the force with which th sludge is going to move and I need the lift (or) displacement from its initial position to final position.

If possible, I need the equation for the lift of the sludge and which should depend on the current which flows in the coil.

If anybody wants the value of the current, I can give it...
pls do help me...I am struck in this problem from many days...

http://en.wikipedia.org/wiki/Solenoid

CS
 
hi everyone,
thanx for replies.
buddies, I do not need what the rod is called as slug or sludge or rod.
I joined this forum in a sole mission of getting some help.
I need the equation for the lift of slug, which is going to depend on current in the coil + some losess. I do not know the force exerted or magnetic filed...
If U can help me that would be gr8 favor or favour...
 
rvb53 said:
hi everyone,
thanx for replies.
buddies, I do not need what the rod is called as slug or sludge or rod.
I joined this forum in a sole mission of getting some help.
I need the equation for the lift of slug, which is going to depend on current in the coil + some losess. I do not know the force exerted or magnetic filed...
If U can help me that would be gr8 favor or favour...

Give this a read.

http://en.wikipedia.org/wiki/Electromagnet

Hope this helps.

CS
 

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