All Questions
Tagged with solenoid inductance
16
questions
0
votes
3
answers
253
views
Inductance of solenoid with solid metal core
Consider the solenoid/inductor like in the picture.
There is an air gap between the coil and the inserted solid metal.
The solid metal is from aluminum or copper (Both have a relative magnetic ...
- 39
0
votes
2
answers
71
views
How to get a smooth operation of multiplexed solenoids
My project involves 100 small solenoids, that I either have drive individually, or hopefully I can drive in a multiplexed configuration, the same way LED displays are driven. Then I only need 20 ...
- 133
6
votes
1
answer
969
views
Measure inductance of air core inductor
I am making an inductor
Air core
Wire: 18 AWG guage
Turns: (I am not sure ) but could be about 6000 turns
The weight of the wire : 400 gram
The coil wrapped by machine
Coil is 5 cm
Diameter of core ...
- 465
3
votes
1
answer
2k
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Calculate the number of turns in air core inductor
Coil specification:
Air core coil
Length 790 mm
Diameter 290 mm
Wire guage 18 - 1 mm diameter
I need the number of turns to get an inductance of 150 mH.
While searching for calculating the number of ...
- 465
1
vote
4
answers
2k
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Designing an RC snubber for AC solenoid lock (inductive load)
I am designing an AC solenoid lock. Here is my design:
Resistance 8 Ω
Main outlet power source 220 V - 50 Hz
Inductance 150 mH
Impedance 47 Ω
I (RMS) ~ 5 A
I read that the inductive load needs a ...
- 69
0
votes
0
answers
100
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Imagine having a broken radio transmitter, and I need to make it work by building a solenoid with an inductance of 100 uH. How can I do it?
This is a problem made by my professor.
Imagine having to repair a radio in a rural area, without any high-tech instruments, and I need to build a solenoid with an inductance of 100uH, a cross-section ...
- 1
1
vote
1
answer
400
views
What equation should I use to calculate inductance of wire coil?
I've been working on a project recently which requires me to build an inductor, however in my research I found many different equations (with a range of variables used and giving very different ...
0
votes
1
answer
1k
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Short circuit of solenoid's windings
I wanted to short a solenoid, so I just touched the wire of two adjacent loops at a point somewhere in between of solenoid, but now I wanted to know what changes occur in its inductance and ...
- 1,184
1
vote
1
answer
316
views
Designing custom solenoid with feedback for measuring force
I am contemplating the construction of a very small tensile force sensor based on the following principle:
1) Use positional feedback to a linear solenoid to maintain a fixed position when the plunger ...
- 203
12
votes
3
answers
665
views
Electrocuting a fruit fly using magnetic induction
We are electrically inducing heart attacks in fruit flies to test the effects of various treatments on survival. We are shooting for roughly a 50% survival recovery rate in our control group.
I work ...
- 121
0
votes
4
answers
5k
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Should I use a permanent magnet inside a solenoid for an electromagnet shuttle?
I'd like to make some kind of actuator/vibrator but much stronger. I thought of using a static, tubular solenoid, driven with AC current. Inside it would be a mobile permanent magnet cylinder (...
- 249
2
votes
1
answer
202
views
Solenoid circuit current issue
I have been working on a circuit go make a solenoid switch polarity with arduino. I originally used transistors (NPN) rated for 1A and 625mW in between the ends of the solenoid and ground. These all ...
- 43
1
vote
2
answers
134
views
Inductor Reactance
I have a few questions about the reactance of inductors at certain frequencies.
I have been working on a project that involves flipping the field in a solenoid with an air core at ~10-20 kHz with a ...
- 13
1
vote
4
answers
657
views
Minimal pulse width to actuate a solenoid
I'm powering a solenoid from a battery, so I want to spend the minimum amount of power to get the job done. In this case the solenoid doesn't even have a return spring, so as soon as the armature has ...
- 690
2
votes
2
answers
5k
views
How to determine the force of a solenoid based on inductance
I'm looking to potentially build my own small solenoids, I thought perhaps that I could take an Air core inductor, a spring, piece of plastic, and conductive core and build my own. Is there a way to ...
- 833