[Sam M] wrote in with a quick proof-of-concept demo that blows our socks off: transferring enough power wirelessly to make a small quadcopter take flight. Wireless power transfer over any real distance still seems like magic to us. Check out the videos embedded below and you’ll see what we mean.
What’s noteworthy about this demo is that neither the transmitter nor the receiver are particularly difficult to make. The transmitting loop is etched into a PCB, and the receiver is made of copper foil tape. Going to a higher frequency facilitates this; [Sam M] is using 13.56 MHz instead of the kilohertz that most power-transfer projects use. This means that all the parts can be smaller and lighter, which is obviously important on a miniature quadrotor.
High-frequency power switching puts real demands on the transistors, though, and the one [Sam M] is using is cutting-edge and specifically designed for this application. You’re not going to get far with junk-bin parts at high frequencies. In fact, the whole inverter that drives the coil is a custom design, and is extremely well detailed in [Sam]’s research paper, available here. (PDF)
High-power and high-frequency can still benefit from having a wire to run along, but transmitting a few watts across thin air like this is a sweet demo. Thanks for sharing, [Sam]!
*flies
*dipterids
Looks, and sounds, like a bug caught in a bottle.
*dipterid
From Ancient Greek δίπτερα, from δι- + πτερόν, two wings. This thing is a quadcopter drone with four engines and 4 propellers which each act as two wings so it should be called an ὀκτώπτερα, from ὀκτώ- + πτερόν, eight wings. :p
I hacked a lot around my hubsan x4, and I instantly recognized the sound of it in this video. You described it perfectly
*puts foil on private parts to prevent them from cooking*
Don’t use copper tape then, it would make the reverse effect…
Wireless power transfer to a golf ball…
https://youtu.be/KtBJmL8hymA
Looks more like a ping-pong ball…
When he’s fumbling around with it at the beginning, he’s getting it spinning, that’s why it looks smooth. I don’t know why he’s doing that though.
This would be excellent as a wireless charging station for drones. Have them located on rooftops all over with exact coordinates and orientation markings publicly available. Then a drone can hope on one of these for 5-10 mins when it is low on power and carry on its way.
Our research group can be found here: http://www.imperial.ac.uk/wireless-power/
Bumps into an edge for 100% of video nope
My question is the usable range of the power source. Wireless power transfer at a good range (hundreds to thousands of feet) would be useful. Even in the tens of feet it can find uses. Less than a foot…meh.
I think this is work in progress, only short distance (10 cm?). Still much better than chi charging.
Wireless power transfer gets four times less efficient as you double the distance. The big advantage is that take off energy can be provided, and it can transfer power even if the drone isn’t perfectly aligned, while flying!
Yeah, even more HF-junk in the air. Seriously, who need this? Charging your iSomething placed on a special surface maybe, but over the air?
Vehicle with supercapacitor / fast charge / durability / wireless (mobility)
“World’s fastest charging electric bus : 10 seconds thanks to supercapacitors”
Wireless is more efficient and no need to stop.
Less battery = less weight = more space
…
Certainly better than monsanto and fossil energies
They killed N Tesla, The search have to start again !
Hmm, Needs more power.. *Sticks fork in the microwave to jam the safety switch on then point that at the quad.
These devices will pollute the RF spectrum like nothing else… pretty sure this would not comply with FCC regs.
It’s so nice to see Tesla’s work on wireless power transmission for vehicles put to use. Took people long enough.
I’d call it “The Banshee”
13.56 MHz is a wavelength of 23 meters, not 23Cm.