That was cool. I’ve been doing some sums and If I’m right it would make for an awesome generator. For each coil 50mm long 2.8+2.8 = 5.6 mm thick winding. With od 25.6 r= 12.8 Calculating resistance values per coil if using copper 1.68*e-8(0.05/.51471811m2) =1.63196123e-9 ohms
From this we can calculate the amps due to coil length. when the numbers are punched in. we get 5.8159805amps from a standing coil. Once the voltage and watts are accounted for you get a generator with 9.49145407V and total watts per coil of 55.2021118W with a little more math all 10 coils will give you 94.915407v 552.021118W for the whole generator. Obviously this would multiple in accordance with lens’s law due to rpms. This follows on from my last comment I’ve pasted it in for reference.
Just in case nobody saw:
We have a ring OD 0.82m. working off terminal velocity of 9.8m/s2 I calculated the tube length in the experiment is .49m approximately from the time it took to fall. Then did a differential calculation to find out how much inductive resistance slowed the ball > 0.12250014 m/s. which gave it 79.990858-1 reduction in speed while falling through standing tube.
So going from 9.8m/s2 > 0.12250014m/s so theoretically. It would be possible to hold multiple magnets in place with a spinning kite with the generator attached. I believe there would be resonate harmonics in relationship with the spin of the kite. also an infinite fall for the ball/ fluid to take. I don’t want to say perpetual gravity generator. if an objects falling with no chance of stopping it certain would come close. It dose however rely on the fact the generators airborne and spinning. For the example shown.
The total track length is 2.5761038m based on the OD. From standing it would take 21.0293947419s for the magnetic elements to theoretically completely a lap. That would increase due to m/s of the kite spinning as it would take longer to complete said lap if the tube was completely copper.
So recommend coil distance and size in my case it’s 1.4mm wire we have two layer giving it a total thickness of 2.8mm approx wound to 50mm in length. Meaning it takes 0.612507s to pass through each coil if standing. I suspect the voltage would increase the faster the kite spins in accordance with lenz’s law. The ball slows >9.187493m/s through each coil. I suspect this would be different depending on coil arrangements. Be that radial or linear flux. Cored or uncored. So based on the lenz law experiment I can conclude that the magnetic elements will recover if the coil spacing are far enough apart.
For our case the spacing would be 24.150955mm approximately between each coil on centres. This is based of the differential loss of velocity vs coil length. along the total track length. This also give you the maximum coil on each ring 10.666675 coil sets per ring. So I’d say no more than 10 coils per ring every 36 degrees. average out the difference between those coils. For design sakes. as this is only theroy taken from terminal velocity. Minus the resistance.
I had an idea it would have worked based on what I knew about motor. A very interesting video indeed. I’m just a little surprised nobody has thought to using a constantly falling magnet in a tube? to power something big. I almost want to name It draupnir after Odin. It was the secret to the aesir’s wealth. Every eight nights, eight gold ring fell from draupnir as he shook it. I’d imagine the ware would be very minimal. Spacing would be key to it successfully operating.
I did notice how quickly it regained terminal velocity once it passes through. It is effectively a solenoid at that point. Provided there constantly and rapid interaction with the coils. I see no reason why it would work indefinitely. The harder the coil are hit the high the voltage out. Depending how big the generator ring and track length are? Terra-watts might be possible. Prehaps even more?
Considering the nesting and stacking options. 550w is mostly what appliance need to operate. Mains uk is 240-250v. This may seem daft but 2.5263158 rpm is all you need for that. Based on 95v. So I suspect it would be higher voltages are achievable in higher wind speeds. Perhaps for example you have 20rpm 95v for a moving ring if I got me maths right 1900v. a bit dream world but. It definitely has potential if true? Might even be very efficient? 70-80% would be good nice. Considering it’s friction less potential.
Great demonstration video. Next question is operating temperatures? If heating is likely?