Solenoid Basics
ฝัง
- เผยแพร่เมื่อ 20 ก.ย. 2011
- Jeri shows the basic construction of solenoid actuators and demonstrates the relationship between strenght and hold power relative to current flow in the coil.
This video was sponsored by www.intersil.com/html/
Thanks for taking the time to do this. People who follow your work know how busy you are and how many projects you are doing ---all at the same time. I am working on a crystalline semiconductor voltaic cell right now and your videos on making a transistor at home have really helped. Thanks.
my left ear enjoyed this video
Why
+meadowsirl lol
+meadowsirl ROFLMAO
Did you mean audio? Because the video is amazing 🤗
Hahah, i stopped the video several times and did a surround test and all kinds of thing because i thought my headset was broken.
You madam just got a new sub .. because you answered a bunch of fundamental questions ie strength , construction etc. Plus your voice and presentation is bar none! Compared to the other videos ive watched. Thank you so much
A great, concise video! These short lessons on basic stuff is great for beginners like myself. I look forward to more!
Is there a part two, three? Why does the video say part 1 but there are no other videos?
Just browsing some videos to re brush up on some less used parts, and boom! It's Jeri! What a great surprise :D
hahaha, me too! I watched one of her vids 2 years ago on how she got started in electronics. I recognized her voice. I am a little bit further in my own education on electronics now myself.
Great video! Thank you for making/posting it! I am working on a project that requires a custom solenoid and having a company make one for me is way too expensive, so my only option is to make one myself. Your videos are a great help. Thanks again!!!
Gorgeous pic of you at the end with the Intersil team! Hope to see whatever projects you guys come up with. :)
My right ear feels left out
Congrats on the new work
can we apply pwm signal for incremental pushing or pulling? or are all full in or full out at fast speed or proportional to voltage?
Great video. This helped me a lot in understanding Solenoid.
Thanks Jeri! Awesome lesson.
Thank you for using layman's terms :)
So helpful for learning the parts & reasons :)
Thanks Jerie! I appreciate what you do...
I love your Eveready 9 Lives cat logo! I haven't seen that logo in years!
yeah, me too! :]
Thank you so much for the tutorial ! Very helpful !
Thank you, thank you, thank you! Just what I needed to know.
I LOVE YOU JERI - please keep up the good work you are doing by demistifying electricity and its applications - quite opposite to my university professor of electrotechics whose only purpose was to beat us down so he and his 40 years old knowledge coudl appear bigger. LOVE YOU! :)
@zanobi The next video will explore the geometry of the solenoid. I've only seen winding the entire length and then moving up a level.
MY LEFT EAR LOVES THIS
The pie cut out of the solenoid was cool. Bet that was tricky to pull off.
Great vid, looking forward to the follow up vid on ampere turns.
Great video. Very informative.
Great video, thanks for sharing
hey , I want this much force for my solenoid .Can U tell which swg(Size) of wire should I use ..?Thanks
good, to test the coil, plugged the most of the power supply on one side and the less on the other side of the coil?
my left ear really enjoyed this video, in all seriousness though, great video Jeri.
@droidclone The field travels down the middle of the coil and around the outside. The poles are at either end.
Wanna build a coilgun. Using iron projectiles and brass or pvc barrel. What is the ideal length to diameter ratio for the solenoid?
Very good video. What is the wire gauge necessary for this solenoid u made also the amperage value. I need the values
Hi Neri,
Why is satovey calling you Peri, Teri?
Thanks Beri
Jeri, where are you!? I miss this channel. :(
Thank you for explaining the strength factors at 2:01.
I want to make A mini jackhammer out of a push pull solenoid. I don't know how to make it work like a jackhammer?? like 'Push and pull' is one cycle like a jackhammer. I have been trying to find out how for like 4 days now. is there a little pcb board that can do this or control it?
i was looking to make solenoid engine so i ad a electric bell which was not in use so i took the solenoid off. then i passed current (12 v ) but it wont attract anything..(not even small screws-the one in toys). it was coiled on plastic so i passed the iron in the middle gap so it now attracts screws but to make an engine it had to attract the iron but it isn't.. pls help
Sorry,where do you buy the red solenoid?
thank you.
part 2 and more please, this is very helpful video. And others learn how to adjust speaker volume and stop complain!!!!
I built one of those floating ball machines using a coil and IR led/phototransistor. I tried short, fat coils and long skinny coils (using the same magnet wire length) and the short fat coils worked much better. This seemed wrong since the long skinny one has more turns. Any idea why? I was using carriage bolts for a core.
Quick question: is the reaction usually just an ON/OFF? Or can you apply/lower current gradually and the coil reaction retracts/protracts gradually?
Gradually protracting your reply, I see.
@jeriellsworth I figured as much. What you do is great, and will be looking forward to it. Take all the time necessary.
@LukeeeeBennettPlus I'm not sure the shirt is still being produced. I got it from a friend Seattle that sold them on his website.
If you had a pull solenoid and it's on and the power goes out would it go into the original position or be stuck in the pulled position?
thanks for the vid! having been recently converted to the "smarty pants" continuum, I find it very interesting.
Yay fun video! wondering can you operate one solenoid at different amounts of current in one circuit? I'm guessing this would be done by some parrell circuit of some sort, or a diff. load voltage?
About time you posted something. TH-cam was getting boring. :)
Hello, please what is the amount of Maximum Voltage my 3.5kg Air Core Electromagnet can bear.
The Core of the Solenoid is 120mm in height and 13inches in Diameter. It core is 47mm wide and 130mm long.
I used 0.31mm thick enameled copper wire to make it and after winding it reads 1.4KOhms
Please may I know the maximum Voltage to apply to it in other not to get it burnt?
How do I calculate that?
When alien tripods raise out of the ground and you find your car is no longer starting, replace the solenoid. I picked up that tidbit of advice from Tom Cruise when he wasn't busy crawling across the ceiling and shooting sparks out of his ears.
my right ear is jealous of my left ear being soothed by jeri's voice.
Thanks for the tips on making stronger solenoids
@jimbobg65 The electromagnets in a MRI machine are super conducting and that is a huge strong magnet.
Great video! It will help to save me almost 21$ - an unbelievable price of a solenoid valve here in Pakistan as per searching on internet.
what if you use a magnet for the armiture? does this do anything?
great video
Sweet. Thanks for the info!
CoOl, Thanks Jerri
@Insignificantful With enough voltage to overcome the inductance of the coil, which would tend to prevent any change in the current through it, if you had a sensor to determine the armature position, you should be able use PWM to put it where you want. But it would be like regulating air to a pneumatic cylinder: it's going to want to slam to one end or the other and you would have to really keep close control to balance the forces of the spring pulling one way and the load the other.
If you made a homemade solenoid, using a 12 volt battery and a variable resistor, would the solenoid core be gradually pulled into the solenoid as you reduced the resistance with the potentiometer? I am trying to come up with a way to have a solenoid mechanism be attached to a cable and as you increase the current the solenoid would pull harder on the cable.
it wont be gradual
Too bad, my headphone only works on the right side...
hahaha, thats very funny
I see you retracting the armature there, but is an arrangement possible where the electrical current would extended the device?
piezo crystal will voltage applied to it will stretch look into those.
It attracts the negatively charged electrons in the iron centre rod. You just need something positively charged. Like a positive magnet. It would simply repel it. The only issues are that you need a way of holding it in there so it does not fly out.
Kris Patel Thanks! I think I got it now.
Argh, damn secrecy. This just makes your project with Intersil sound more awesome. Hopefully you can show the real project soon.
🔴 What Is Islam? ⚠️
🔴 Islam is not just another religion.
🔵 It is the same message preached by Moses, Jesus and Abraham.
🔴 Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God.
🔵 It reminds us that since God created us, no one should be worshipped except God alone.
🔴 It also teaches that God is nothing like a human being or like anything that we can imagine.
🌍 The concept of God is summarized in the Quran as:
📖 { “Say, He is God, the One. God, the Absolute. He does not give birth, nor was He born, and there is nothing like Him.”} (Quran 112:1-4)[4] 📚
🔴 Becoming a Muslim is not turning your back to Jesus.
🔵 Rather it’s going back to the original teachings of Jesus and obeying him.
Is it possible to have current flow both way to have a push pull action without a spring? Like using ac?
No, the armature will be pulled into the coil regardless of power supply polarity. I made a push / pull solenoid - it has two seperate coils, one at each end, and a piston made of brass and steel. I made it for a model electric steam engine I built (it's on my channel if you're interested).
I'm very interested. What's the name of the vid and or link?
nickquik
The video is called "Electric steam engine with walschaerts valvegear" also feel free to check out my other model engines while you're there.
Yes it can push and pull, if you use an armature that is a permanent magnet
I enjoyed this vid. Very helpful! But where s part 2?
Plz tell, how much turns and coil wire size that solenoid coil.
Hi Jeri - @ 2:44 So if one calculated the difference in the current pull VS the current required at the point that the solenoid releases the weight - could the weight be calculated? Solenoids are simple movers at best I know, but I was wondering if one could use them with current regulation for a simple Haptic technology feedback? BTW good luck with your amateur radio exam :)
nice video, very didactic!!
@jacgoudsmit Yep. The coils were dead already for various reasons. I remember getting batteries with cats on them as a kid.
What solenoid was used at 0:31?
@Lidmotor I can't wait to see what you come up with.
JERI ELLSWORTH, what determines the solenoids pull strength and push strength?
Thank you for this
thank you iev learned a lot.
I’m building a possum trap. Cage type. As a kid I made traps where a possums weight on a ramp tripped a guillotine type trap door that shut behind animal.
Now I want a electric trip where I still use a ramp which taps a micro switch that sparks the coil/solenoid pulls the pin that drops the door.
But how do I stop power after trap has tripped?
Power would have to be switched off to avoid burning out coil.
Is there a part 2 for my right ear?
part2?
?Question: When a coil begins to freak (high frequency chatter) first could you elaborate why it begins to fail in this manner, second? Is there something that can be added to eliminate the freaking.
I will eventually absorb all of your lectures, this means the world to me. Your method teaching is superb, exactly what I need. It must be that those of us that circumvented the education system
@frac A magnet should work if the coil produced a field of opposite polarity. Of course it would have to be made of a material whose magnetic domains would not flip from the mechanical hammering that a solenoid would take. Magnets are used in some relays (like reed relays) to work with the coil. Magnets are sometimes used to hold relay armatures in whichever position the relay was last put in. Or to prevent contact bounce.
very nicely done and informative!
but where is part two of the tutorial ? ;-)
thanks Jeri
perfect explanation and I love it. maybe I make a selenoid -stirling engine then I want your experiments. later
Oh wow, this reminds me of when I used to service the machines at Sol's Pinball Arcade, on Brighton Pier. The place was powered off of a 220v 3-phase board, with a real 'Soggy' (high resistance) Neutral
One night when the illuminations and floodlights were turned on, the power rocketed up to 300V, there was smoke, bulbs popping, the place was in chaos!
It sure got Sol annoyed
@ngneer999 Mag strength = current X turns. But what happens to the strength depends on the path it must take, i.e. the core, etc.. Maybe the path the flux had to take through the air (in addition to the iron) had a big affect on the strength. What would be the result of your trials if you used iron for both the inside AND outside the coil, I.e. wind it on a long, narrow horseshoe? Would fat beat skinny then? My gut says if you use the same path for both shapes, it gets back to current X turns.
can you let me know how do we calculate that force with which the actuator retracts?
+Varun s kumar It depends almost entirely on the voltage you are running, the spring, the gauge of wire you use and the number of wraps. Without knowing the variables it is almost impossible to determine, trial and error may be your best bet.
+Tim W-R thanks man.
@KaslarProductions A-Z videos take huge amounts of time and I can't devote the time to them for a while. It will be months.
Nice test, but how does voltage effect a solenoid.? I wanna use the lowest current possible.. I'm making a solenoid for a project i have, I need a short, fast, hard actuation.. (1/2 second)..
More voltage = more current. Ohm's law.
Nice explanation. I look forward to more videos from the Academy of Analog Pinball Wizardry (neat name.)
Is there any relation between the length of the solenoid and the magnetic field?
No, once it's out of the solenoid it just floats. The magnetic field goes forever.
@jeriellsworth The Classic Eveready 9V batteries had the cat with the lightning bolt tail jumping through the number 9. They still have a smaller logo of the cat on the Everready 9V.
@joshcryer Thanks!
some viewers may find it useful to realize that the armature tugging force is proportional to the current squared.
It puzzles me as to why that no person seems to mention this useful fact. See for yourself here, www.daycounter.com/Calculators/Magnets/Solenoid-Force-Calculator.phtml
Xavier Axiak Hi Xavier, if the centre bar or plunger meets considerable resistance whilst activated , will this potentially damage the coil ?
If it is a single coil solenoid and no complications in the drive circuitry(fixed voltage), the dissipation will stay the same. The temperature rise will be about the same. There will be less heat transfer to the plunger so the coil is likely to reach its final temperature a little sooner.
If the solenoid has a low resistance pull in winding which stays energized for too long, it will quickly go over temperature and be damaged.
The lid latch solenoid(single coil) in my f&P washer is momentarily pulsed with a higher voltage from a capacitor to increase pull in force.
So the answer is, "generally no".
Thanks Xavier. I have an appliance which has a solenoid operated valve passing water. It is 12 volts. The valve is kept shut by the water pressure and is powered open. Which should not exceed 5 bar whilst open. It sometimes experiences water pressures around 9 bar for about 20 minutes at a time. I thought this might have a negative affect on the coils or windings. Thank you for your comments. Really appreciated.
I'm trying to figure out what solenoid ratings mean. If a solenoid says "20N" I am guessing that means it can exert that amount of force. But does it mean 20N will be exerted in the final millimeter before stop? This is kind of annoying because there are many more applications for something that can exert 20N over 10mm rather than 20N over 1mm.
Well explained
Jeri ! where are the other parts of the series "solenoid basics" ??? do they still exist ? I hope you talked in them about the voltages that they can receive,what would happen if you apply lower or higher voltages to the valves..how can you adjust the voltage to a certain valve..and so on..that is very nice of you if you can talk about this issue" sol. valves and voltage"
@dealio82 Yes, but the hard part is not the coil, but the iron magnetic path around it that focuses the flux to get maximum force on the armature, without which if would be much weaker. But why start from scratch when there are so many available as surplus? If you want one to play with, find a dead auto starter solenoid. Remove screws or grind/file off rivets to open and repair the wire break or whatever; the fault should be easy to see. AC solenoids can be had from scrapped clothes washers.
Most excellent
Thank you.
Great job ... !!!
👍+sub ... !!!
Regards Paul P.
Shouldn't it expand if you run the current backwards tho?
Why doesn't the current just take the shortest route? Why does it have flow through the wire and not jump from wire to wire?
The wire is insulated with varnish, sometimes clear varnish so it looks like bare copper
I have a q. At some point i had to take apart 4 big old style photocopiers. Obviously i managed to get a ton of "free" parts. Among them a lot of solenoid actuators for the trays rollers pins etc. I've always wondered why the tip of the armature in those types of solenoids are conic and not flat like in the ones in the video. Thanks in advance.
@droidclone When the magnetic path is through a closed iron circuit (as in this case), the flux is in a circular shape. Where is the start or end of a circle? There is none. So there is no pole per se. A pole is just a place where you can shove in something to sense/measure the flux, but if it is inside where you can't get at it, one place is just as "poley" as another. If you removed the armature, the poles would be where the metal ends and the hole in the coil starts. It's just a concept.