High Voltage Induction Launcher
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- Опубликовано: 24 авг 2024
- In this video I'm going to use a pulse of current from a 1,200 volt capacitor bank to launch metal objects through electromagnetic induction. This is a really interesting area of electromagnetism, because it's effectively generating a huge repulsive magnetic force between two objects without any magnets actually being involved.
The large electromagnet used in the second part of the video is from a microwave transformer. The core can be sliced fairly easily with an angle grinder if you make your cuts right at the weld lines. As a transformer, magnetic flux is circulated between the primary and secondary windings, but with one end open, magnetic flux is free to "leak" out into space, turning the transformer into an electromagnet. This is probably the cheapest and easiest way to make a very powerful electromagnet.
Hardware List:
Power Source - 12V / 450 mAh LiPo battery
Rectifier Diodes: 4kV 0.25A - GP02-40-E3/54 (x4)
Capacitors: 2200 uF 400V - E36D401CJN222MC92M (x3)
Transformer Secondary Wire gauge - 28 AWG
Launch coil wire gauge - 18 AWG
www.amazon.com...
ZVS Driver + Flyback Transformer package:
www.amazon.com...
(I didn't use the included flyback primary/secondary but wound my own instead)
Music:
Serge Pavkin - Fractal
• Free Music / Tech Futu...
Serge Pavkin - Network
Serge Pavkin - Tech
• Free Music / Tech Futu...
That upward shot of the rings shooting up, falling, and bouncing made me have flashbacks to Sonic video games
My undergraduate physics department made a similar device to cut aluminum cans in half.
The thin wall aluminum when inserted inside the coil results in a radial force from eddy current induction and the can splits itself in half and the centerline pushes into the center of the can at all points.
Sweet setup! I have made something similar with huge capacitors but I used a large beefy SCR as a switch instead of a metal object on a stick . It actually worked great. I think manually shorting them results in a waste of energy when it arcs and possibly "bounces". But then again, an SCR's internal resistance may or may not be worse. It's worth a try if you have a big metal SCR laying around (not the 3-pin through hole type).
scr sounds like a clever idea! I know of alot of scr from china having fake ratings
Fun fact - if you cool those metal rings by keeping them submerged in liquid Nitrogen for sometime, you'll be able to launch them even higher
Your channel is great and I hope you can gain some more traction on here. Great stuff!
thx
@Phumgwate Nagala He had one video that got over a million views (and another one with more than 500k I think). It's weird how the rest of the videos still have ~10k views and his channel overal is still small. It's definitely good and deserves more subscribers! If I could buy futures (or a call option) on this channel's subs, I would :p
Regarding the circuit to measure the cap voltage with the 3 resistor voltage divider, I suspect that your voltage is quite a bit higher then the measure 400V. Why? The typical multi-meter has an input impedance of 10M ohms so your final resistor is actually two 10M ohm resistors in parallel or 5M ohms. Looking at your meter I can't imagine that it's input circuit would be anything but 10M ohm though I have been told not to judge anything by its cover. If you have something like an SMU that can measure very tiny currents it's always fun to set it into constant voltage mode and use that to measure the current thru a multi-meter and hence determine the meters input impedance at DC.
I read an article a few weeks ago stating that hundreds of home hobbyists die because the microwave transformer is made to work 100 percent duty cycle and most hobbyists take chances. Nice video also Sir.
sort of.
take a neon sign transformer. theyre wound at the ratio to give 15kv, but are only very loosely coupled, they have a lossy core.
this means that OPEN CIRCUIT, they make 15kv...
but when they are running across the arc of a neon sign, they drop... sag... right down... to only 15V or so. at 30mA. or 60mA, depending. thats all the neon tube needs to remain conductive, but it needed the 15kv to ignite in the first place.
a microwave oven is designed to give 1.2kv or whatever into the load presented by the magnetron and circuitry.
its about reflected impedances.
the power supply, the wall, has "zero impedance". its only limit is the wires, the fuses... if you short it, instead of the voltage sagging, theres so much power it just blasts current and blows everything. when people go on about amps or volts that kill... its the POWER dissipated in a resistance. the heat it produces.
a transformer reflects at the square of the turns ratio. at 1:1, it reflects the load, and thats what the supply sees. you can make it so it limits the current by poor magnetic coupling, otherwise...
old welding transformers and large regulators had cores in them that moved dependent on the current to maintain constant voltages etc... a stick transformer welder still uses an adjustable core to vary the current. turns ratio stays the same, magnetic coupling affects power transfer.
if it steps DOWN, to a lower voltage, then the resistance of the secondary appears higher to the source.
if it steps UP... then the resistance of the load, teh secondary circuit, is reflected as a lower value, and can flow more current because of it.
put a single turn into a microwave oven transformer, and the resistance of the load, YOU, or the short... is reflected back at 1: say, 3000 turns... square that... the supply sees say, 90K, and that limits the power that can flow. even with the 0.001R of the secondary winding itself, only so much power can flow through its reflected resistance. the power point is NOT an infinite source of power, but has its own limitations, of course... just because theres a huge step down ratio doesnt mean a huge current can flow! there has to be a voltage to drive that current through a resistance.
when it steps UP, that all reverses. the load reflects as LESS resistance, and now its simply the windings, their ability to take current, the transformer design, that limits the power that can flow. if you short a MOT, it reflects back as thousands of times LESS... and the current goes out the roof!
its tricky at first. pretty simple when you think about it.
Simplicity is the key to make things happen for a many. Nice fella. @@paradiselost9946
Microwave transformers are incredibly dangerous but you don't understand what you are talking about. They run at different duty cycle depending on the heat of the microwave. They are dangerous because they can make lots of current like 1amp at high voltage and low frequency. Plus in this project he is only using the primary so it has no such risks as no high voltage is involved.
Thank you for clearing that up Samuel. Peace and have a Happy New Year too. Hopefully many more for me and you to come. 😀😀@@samueldavies646
Add a soft iron core on top of your transformer, at least 30 cm. You will have a dramatic increase of speed.
I found out quite spectecularly, when I did this at school, I shot out a lamp in the ceiling.
you should not have launched that coil of wire unless you are willing to destroy it because when the coil lands on the ground it nicks the wire and scrapes off the varnish coating and can weaken it so it will break.
I want to make one that has a round projectile, like a bullet.
With a few stages, it might have bullet-like speeds.
You can remagnetize neodymium magnets that have lost their power due to heating with this, just hold the magnet with something, actually if you do this many times, it gets even and even stronger till a point
I wonder if you could speed up the charging process to create high voltage induction pulses generator. Theoretically you could utilize a metal plate as a base to levitate a high speed electrotromagnetic pulse generator.
lets use it to turn a giant pulse motor wheel and charge a bank of batteries!
Love your channel
Next: Hybrid electromagnet induction and chemical rocket launch to space. Well maybe not space but.... for serous extra height.
Thoughts to consider.
a) The exhaust of a rocket might serve to short the spark gap.
b) Ejection launch ring after EM induction launch portion is complete.
c) Launch lugs attached to side of the rocket made of copper pipe surrounding an iron rod whose base is wound with electromagnetic coils make up an electromagnetic induction assisted launch pad for a chemical model rocket.
I've thought about this a few times. It could be possible to use the aluminum structure of a rocket for eddy currents to push it along with an electromagnetic pulse. Not sure how that'd compare to a mechanical catapult, though. As cool as electromagnetic induction / ferromagnetic attraction is for propulsion, it's really really inefficient
@@HyperspacePirate if going hybrid launch, you'd want to shed the weight when your done with electromagnetic phase of a launch.
Well designed 3 phase Induction motors can do fairly well at converting electrical energy to mechanical. It is a little bit more challenging to do it as efficient with a linear induction motor, but it is used in levitating trains. Imagine a three phase induction ring launcher with an iron rod in the center and sets of 3 coils wound on it.
with a larger rocket The metal must be thick enough that it can carry sufficient current, and the induced current's magnetic field restricts further penetration of the changing original magnetic field.
Efficiency? I don't know, but I strongly suspect it is significantly more efficient than producing the chemicals and the effective efficiency of thrust.
Have you seen the motor I made on my channel?
@@kreynolds1123 I suspect what you'd end up with is something similar to the sabot used in the US navy railgun that breaks away once the round leaves the barrel
@@HyperspacePirate I was envisioning more traditional launch lugs seen on model rockets. But they'd be a wider diameter, and ideally detachable shortly after lift off.
The point is, if rockets are their least efficient when going slow at take off, en.m.wikipedia.org/wiki/Rocket#Energy_efficiency , then getting them started with a linear induction motor make the chemical part of the launch overall more efficient, or allow a reasonably significant amount of weight reduction in the chemical motors.
On a large scale, I see potential structural issues using induction launch lugs for a significant portion of the initial launch acceleration. But maybe not so bad that they couldn't be worked out.
The MAGNETO-YEETER 5000...😉
you should try 15 turns at 12 in diameter on the aluminum plate. you get a much greater force for less. i got mine to fly up about 100 ft, i also used double the voltage.
The more voltage you use the less turns you need.
Amazing work! Just wondering, for your original design (without the microwave transformer) wouldn't performance improve vastly by simply adding a soft iron core in the centre?
Yeah, it would. I used the sawed-off transformer because it was what I had readily available
I'd say whatever core you put in there, it will saturate, given the very high current densities. Also, adding iron increases self-inductance, making the coil "slower". Perhaps the ring has already left the coil while current is not yet at its maximum? I think it's a complicated optimization :) (I tried to optimize this once)
@@HyperspacePirate 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)
Becoming a Muslim is not turning your back to Jesus.
Rather it’s going back to the original teachings of Jesus and obeying him
@@ahmdabdallah5811stop bringing religion into this
Hi, can you do a video on the high voltage transformer? with its driver and how to measure its voltage.
You forgot to account for the multimeter input impedance in the schematic, but as it would then be 2000V across that 1200V cap bank I presume you did account for that later.
cool idea!
you should have waaaay more subscribers than this
It's pretty boring to only throw rings in the air. Why don't you build a Baffle plates accelerator? It consists or a thin plate (like 2 till 3mm thickness) on a coil, the coil has a heavy frame the frame consists of a heavy plate with a decent hole then the setup is coil thin plate with projectile played on the center and the heavy plate with the hole in the center on top hold by the frame. The coil acceleratortes the thin plate with the projectile and hits hard the thick heavy baffle plate the thin plate stops the projectile flys extremely fast and high in the air.
Is it enough to rip a can in half?
The sound at 6:16 wasn't good. Put a dent on the roof of a car?
I hope you are still monitoring comments from this old video! I am trying to use the output from a Marx Generator to power a mini-Lenz Law launcher. How do you calculate the optimal number of turns in the launcher coil?
nice
I played back the intro with the speed slowed to 1/4, made no difference. The ring simply disappears. lol
Luar biasa🥰🥰🥰🥰
Hi. Will this work in case of solid or hollow metal sphere instead of metal rings?
Hi! Great project, and excellent height on the ring :) I was wondering how you were able to trigger the ZVS you had? I have the EXACT same model from Amazon and for the life of me I can't get the oscillation to trigger correctly and end up getting low voltage and weak current. Are you using some sort of soft-start switch, and if so can you please share the circuit diagram? Thanks!
What do you mean by trigger the zvs?
If it can produce an arc it works
I wonder how 100KV induction will look like 😂😂😂
Probably not very good as your capacitor won't store much energy as 100kv of capacitors will be very expensive and most of the energy will be lost in an arc even under oil
Railgun
I can has STL file for transformer bobbin? 100% will give shoutout in next video (coming soon!)
I couldn't find the file, but I'm going to make a much better one and post the files. This transformer is way below optimal because the turns ratio is too high and the current is low, so it's not well matched to 1200V
Interesting, so the zvs circuitry via the windings is only for charging up the caps?
Yes. The continuous current output of the high voltage transformer is extremely small (on the order of milliamps), so it's bottled up in capacitors to give the high current (>1,000A) pulse
@@HyperspacePirate so More 400v caps in parallel would mean even more 'explosion' right?!
@@ThaboW11 Yeah, that's right, although If i got more caps, I'd put them in series to get a higher voltage and lower capacitance so that the LC time constant of the circuit would be smaller and dB/dt would be higher
@@HyperspacePirate Cool.
@@HyperspacePirate but if the capacitor discharges in the coi,l wouldnt it make a resonance circuit? and could it damage the capacitors by charging them in the other polarity because of the colapse of the magnetic field in the coil? and would it be a good idea to put a reverse diode across the capacitor for pulling the negative charging
Do you have the part number for the “1600V 800A diode?” I’m looking at building something similar in principle (including electrolytic capacitors) but I’ve had trouble sourcing diodes for it.
I think that particular part number went obsolete. Searching on DigiKey, looks like a suitable substitute would be VS-60EPS16-M3, which is rated for 1600V and 950A peak
@@HyperspacePirate thanks so much for the quick answer!
Make électromagnétic gun
Could you tell me if a 0.1nF Capacitor at 200kV is deadly? I'm building a Marx generator and it's hard to find information about when a capacitor becomes really dangerous. I'm sure you know more than me because you handle with even more dangerous stuff in this video.
I looked into this a little while back when I was researching static charge built up on the human body. It seems the general rule of thumb is that approximately 1-joule of energy from a static discharge is the threshold for lethality. I can't give you a source off the top of my head, but that's the number i saw several times.
The capacitor you're describing would carry 2J of energy, so if it arced across your heart, there's a very good chance it would kill you. However, that situation is relatively easy to avoid. Don't get near/touch charged terminals, and always use an insulated rod with a ground connection to discharge your system before you work on it.
@@HyperspacePirate Thank you very much. What you are saying fits well to what I could find on the internet.
A 3d plot with voltage, capacitance and chance of death on the axes would be so nice, but I guess noone has ever aquired data on this topic.
The 1-joule rule is good, but not always true. A low voltage cap can have more than 1 joule and may not be deadly, because the energy is not tranfered fast enough trough the human body and the current is too low.
Here you have made the start propulsion or trigger mechanism for your rail gun.
When you press the trigger the gap is closed, the coil is charged pushing your projectile into your accelerator coils which will add velocity extending the distance range of your rail gun.
People think this technology is new but rail guns were used in WW1, bloody great big things, I have a picture of the thing I'm talking about and men are sitting on the turret of what looks a bit like a giant tank but on rails, definitely a rail gun as there was many huge coils around the barrel.
Very impressive things but where have these things vanished from history?
You can likely tell that I'm very interested in deed in electromagnet's 🤣
EMF at certain frequencies is a harmful toxin that accumulates in the body in absence of vitamin D and causes symptoms of cold and flu. C****a electrical discharge. The word "poison" in greek/latin is "virus", obnoxious substance harmful to health...
I apologise for the riddle but you're a clever guy😉
That definition of "virus" in the English Dictionary is lies, nonsense, it's not even an English word so has no business being in there especially with a definition so different from the original... The disease is EMF poisoning.. You know what I'm talking about and it's caused by the new telecommunications technology 👍🏼✌
Never have I read so much BS in a single comment.