Questions tagged [magnets]

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19 questions with no upvoted or accepted answers
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1answer
282 views

Magnetic decoupling torque

I have a system consisting of 4 magnets rotating at speeds between 200 and 6,000rpm, which are facing 4 other magnets with a 0.5mm gap between the two sets. The set-up looks like this: Both sets of ...
3
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1answer
195 views

How is the attractive force between two magnets changed when they are separated by non-metalic solids?

I recently encountered the following practical problem. We have a system of several layers: a neodymium magnet; a disc, dimensions and grade to be determined 1 mm of 925 sterling silver; we can ...
2
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0answers
37 views

Magnetic Force - Point of Load

I am using a Magnet like this in an assembly and I am trying to calculate the torque in point P2 (see picture below) resulting from the attraction force F between my magnet and the steel part. As I ...
2
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0answers
133 views

Using magnetic field readings for linear gesture recognition

I am thinking about using a permanent magnet as an input device for my smartphone. I have been reading some papers about it, but I really want to understand how things work. Using the integrated ...
2
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0answers
49 views

Could magnets at the RHIC be damaged like the ones at the LHC were in 2008?

In 2008, an electrical fault led to a freaky magnetic quench at the Large Hadron Collider, which in turn released a lot of helium, damaging dozens of superconducting magnets in the process and setting ...
1
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0answers
26 views

Practical estimation of magnetic force

I'm trying to estimate the magnetic force which develops on a truss-like ferromagnetic structure (I want to estimate the motion of the object) in a uniform magnetic field, and I came to realize that I ...
1
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2answers
111 views

How to design a magnet to handle a known force?

There is a metallical structure. I can estimate how much steel are in it. I would like to know how tall/strong a magnet should be to maintain a certain object to the metallical structure. The object ...
1
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2answers
106 views

Compensating for a magnet in a device with a magnetometer

I'm working on a device that relies on data from a magnetometer. Unfortunately, the device also needs to have a fairly powerful magnet on it. Given that the design is fairly flexible, and within ...
1
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0answers
67 views

Does the Hyperloop One suspension require constant current through copper windings?

As a follow-up to How does the pressurized suspension of the Hyperloop not affect the tube pressure?, I believe (though I can't find where I read it now) that the Virgin Hyperloop One implementation ...
1
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0answers
69 views

Could we use NE 555 Timer for industrial magnetic proximity switching circuit?

I actually need a magnetic proximity switching circuit such that In the case of water in fuel sensor, whenever the water level in water in fuel sensor increases the magnetic float shall move and come ...
1
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0answers
76 views

How can I calculate field strength of a Neodymium Ring magnet at an angle?

How can I calculate field strength of a Neodymium Ring magnet at an angle? I have a Neodymium Ring magnet, and I rotate the magnet around an axis perpendicular to the poles. (Not continuous rotation). ...
0
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1answer
45 views

How this synchronous motor works and how to modify them?

I have the following synchronous motor ripped out from an old range hood in my kitchen. I used new electrician tape to cover up the coils that should form the electromagnet--the old cover is too oily....
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0answers
29 views

What is the most efficient way to convert shaking/vibration to electrivity?

What is the most efficient way to get electricity from shaking? I am thinking about something like shown in the picture below (the magnet is going inside the coil), but maybe there is a better design ...
0
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1answer
53 views

How could you produce large quantities of metallic hydrogen?

Could you somehow crush hydrogen atoms with magnetic fields in order to produce it? Or maybe someday someone will invent a material capable of withstanding 500GPa and we'll have giant machines that ...
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0answers
23 views

Magnetomotive forces acting on assembly

Apologies if this is the wrong place to pose this question, or if it is poorly formulated, I would appreciate any help, even if that is pointing me to a place where I can learn more about solving ...
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0answers
19 views

Restricted Rotation using electromagnets

I was wondering if I could restrict the rotation of a part over another in one direction alone using an electromagnet but allowing me to have a continuous rotation if forced (maybe by using some ...
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0answers
39 views

Is it possible to protect electronics on a cubesat from 100-1000g of acceleration

I am currently researching the feasibility of setting up a coilgun that launches Cubesats for a paper.
0
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1answer
353 views

Difference between permanent magnet and electromagnet exciter generator in principles wise?

I searched about this, but couldn't find any helpful explanations. All it says is that magnetic field is generated by either permanent magnets or electromagnets. In both cases, how does the exciter ...
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0answers
35 views

Calculate the relative pulling force as function of size for neodymium magnets

I want to optimise the size and shape of a magnet for a desired pulling force. (Please forgive my limited knowledge of magnetism). A cylindrical magnet fixed to an object will hold it in place by ...