All Questions
Tagged with solenoid electromagnetism
66
questions
4
votes
4
answers
1k
views
Can a slanted magnetic field be created with this insulated stranded wire arrangement?
I am considering building a small-scale experimental coil gun because I have an idea of how a magnetized projectile could be rotated while it is traveling through the coil(s), similar to how a bullet ...
- 173
7
votes
1
answer
212
views
Equation for the force created by a solenoid
I'm trying to make an electro-magnet and I want to figure out what core and wire I need using math instead of trial-and-error.
I want it to produce ~1.5 newtons of force at ~1.5 inches from the magnet....
- 173
1
vote
2
answers
87
views
Driving 12V hand wound solenoid using PWM
I'm trying to drive a hand wound solenoid (140 turns of 0.8mm enamel copper wire, 4cm long) with a 12V/2A power supply. I need to control the intensity of the force generated by the solenoid, so I'm ...
1
vote
1
answer
112
views
Finding the ideal parameters for a homemade electromagnet
I am making an electromagnet and I was watching some videos on designing one. I just have some misunderstanding about power calculations of electromagnets and I have some questions about it.
Q1)
1.1) ...
- 177
0
votes
0
answers
55
views
How does this motor work?
I have been on a bit of a quest to find some sort of linear motion device to compress a spring with 15kg of force 80mm at 1600mm/s, with continuous duty cycle, ideally under $40. So I was digging for ...
- 43
0
votes
3
answers
127
views
Linear Motor Design
I previously uploaded a question on trying to make a solenoid attract a magnet 80mm away, however this ended up being an impossible ask due to solenoid's having a max effective attraction distance of ...
- 43
0
votes
1
answer
164
views
Strong Compact Solenoid Design
I have a spring that I need to compress 80mm. To do so requires approximately 15kg of force. To compress the spring, I will have the spring in front of a piston head. The piston head will have a ...
- 43
0
votes
0
answers
116
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How do we calculate the cross section area and EMF in a solenoid?
Case 1: Consider an air core solenoid \$S_0\$ with inner diameter \$(d_{in0})\$ = 10 cm and the cross section area of the wire = 0.1 cm, outer dia \$(d_{out0})\$ = 10.1 cm. The number of turns in the ...
- 1
0
votes
0
answers
85
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Calculating optimum shape of an air core solenoid magnet pair with given number of turns
Consider a cylindrical \$N52\$ magnet with mass \$m_0\$ travelling in horizontal x-axis with initial velocity \$v_0\$ in \$-x\$ to \$+x\$ direction. It passes through an copper air core solenoid on ...
- 101
0
votes
0
answers
49
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Could I use a solenoid to push a wire, without the solenoid's electromagnetism affecting the wire? (or vice versa)
If I have a solenoid, and I put current through it, it would push a metal rod. This rod would be inside of the coil, and have a casing (to not damage the coil).
Something like this image on google:
I ...
- 453
2
votes
1
answer
81
views
DIY fixed voltage solenoid inductor -- do more loops actually make the B field stronger?
I'm building a custom electromagnet. Given the fixed voltage, I'm wondering if there's actually a benefit to putting more wire loop layers in my solenoid given the trade-off of increased resistance/ ...
7
votes
1
answer
1k
views
Why doesn't an AC solenoid coil change magnetic polarity on each cycle?
I am trying to figure out how an AC solenoid coil maintains its N and S magnetic polarity.
Since in a sinusoidal AC, current alternates in both directions. How does the solenoid not change polarity (N ...
- 89
-1
votes
1
answer
43
views
Induction on the center of solenoid
Why is the magnetic induction at the middle of the solenoid greater than at the end of the solenoid?
I know it's bigger, but the question is why is that?
-1
votes
1
answer
48
views
Solenoid magnetic induction graph
I need help solving this problem, if anyone had a similar problem it would help me a lot.
A table is given with the current flowing through the solenoid,also values for the magnetic induction vector ...
0
votes
1
answer
158
views
Electromagnet force and magnetic permeability
In a cylindrical core electromagnet,
Magneto-motive force (MMF) = 613 At
Magnetic strength (H) = 15345 At/m
I am using an iron core with 10% silicon in it, so the saturation magnetic flux density of ...
