Electromagnetic elevation expectations

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    Electromagnetic
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Discussion Overview

The discussion revolves around the feasibility of designing a large electromagnet, specifically a 76 inch by 80 inch platform, capable of elevating a plate of the same dimensions with a maximum weight of 400 pounds. Participants explore both the technical and cost aspects of such a design.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions the realistic expectations of an electromagnet's size and weight capacity, suggesting that smaller electromagnets used in scrapyards can lift more weight without needing a large platform.
  • Another participant emphasizes the necessity of maintaining the specified dimensions for the electromagnet and the platform.
  • A different viewpoint suggests that making the electromagnet larger could simplify the design and increase its lifting capacity.
  • One participant provides a technical calculation indicating that an E-shaped electromagnet with a specific cross-sectional area and magnetic induction could theoretically lift significantly more than 400 pounds, while cautioning against exceeding certain magnetic induction levels to avoid saturation.
  • There is a suggestion that constructing such equipment should be done by an expert due to the complexities involved.

Areas of Agreement / Disagreement

Participants express differing views on the size and design of the electromagnet, with some asserting that a smaller design could suffice while others argue for the necessity of the specified dimensions. The discussion remains unresolved regarding the optimal design approach and cost feasibility.

Contextual Notes

Participants mention various assumptions regarding the design, such as the need for specific dimensions, magnetic induction limits, and safety considerations during testing. There are also unresolved questions about cost feasibility and the availability of design plans.

Who May Find This Useful

This discussion may be of interest to individuals involved in engineering, physics, or those exploring practical applications of electromagnetism in lifting technologies.

Drnwooten
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I am wondering the realistic expectation of a large, rectangular electromagnet, or series of them, to elevate a variable weight.

Specifically, can an electromagnet be designed in a 76 inch by 80 inch platform and elevate a plate of the same dimensions that can hold a maximum of 400 pounds?

Secondly, if the design is feasible, would it be cost feasible for the materials?

Thank you so much.
 
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Drnwooten said:
Specifically, can an electromagnet be designed in a 76 inch by 80 inch platform and elevate a plate of the same dimensions that can hold a maximum of 400 pounds?
Yes. Actually, it can be much smaller. See the electromagnets used for scrapyards, they are smaller, can lift more, and don't even need a special platform.

What is "feasible" for costs? Different applications will have different limits.
 
Thanks for your reply.

I need the base to be that specific size though, and to be able to levitate a platform that same size.
 
Well, it can be smaller. Making it larger makes it easier.
 
Excellent! That's what I was hoping for.

Thank you very much.
 
Can you direct me in the way of making this happen? I'm having trouble finding design plans for something like this.
 
Lifting loads of that size with an electromagnet should be done by equipment built by an expert.
 
Drnwooten said:
can an electromagnet be designed in a 76 inch by 80 inch platform and elevate a plate of the same dimensions that can hold a maximum of 400 pounds?

Say you make an electromagnet with an E shape, a total cross section area = 1m2 and a magnetic induction = 1T, it can elevate an iron plate about 41000 kg. ( 74000 pounds ). The force is proportional to the magnetic induction and the cross section area.

So obtain an E shaped iron core and calculate number of turns and required current by means of amperes law. ( Remember about 0.1mm airgaps ).

Don't use higher magnetic induction than 1T, or the iron will saturate. Calculate it to elevate 400 pounds+30%.

Keep your feets at some distance during test. :wink:
 
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