The Truth About Wireless Charging

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Real Engineering : Huge thanks is needed to Mike from Mobox Graphics (link in description) for this video. Mike is a fellow mechanical engineer and animator. 95% of the work for this video was done by him, including the writing and editing. I just did some minor editorial work and the narration. Wouldn't be able to afford to employ him without Patreon and sponsors like

Callan Whitney : I think a smarter approach given the current (haha) inefficiency of inductive tech, is that we might instead find power inputs on the underside of cars, and chargers that come up from the floor that can work in conjunction with the car's intelligence and find it's way to dock completely unassisted by humans. We can use the tech that's already in Tesla's now to our advantage and make markings around the parking space on the ground that allow the car to see exactly where it is, and then the charger can come out of a hatch from the ground up and plug in! Easy 100% efficiency, and I would say we're much closer to achieving this than slowly developing convenient inductive charging with 90% or higher efficiency over decades.

Jay Perrin : This affects 'current' technology ;)

Festive respect tracking Fancy Fedora : Efficiency is Bae (edit: and by "Bae" of course I mean good)

Ma'al : Love your channel and videos. Its easy understand and enjoyable.

Peter Stoichkov : I was wondering at 6:00 you said Tesla model 3 but on the screen was model s which one is it. And keep it up man. Me and my math teacher love your videos.

Chuckles Nuts : biggest reason for inductive coupling (which is the proper scientific term) is reduced strain on the USB port. i wore out my USB port on my phone 2 years ago. but it has inductive coupling built in as well that i never used. adding a car mount and a desk mount to charge my phone via inductive coupling has allowed me to continue to use my phone.

Joshua Tobin : gimmick

Merc E.Z. : Can't believe I wasn't already signed up on your notifications but I DO check your channel often. Please don't change anything! As much as I want to see two or three of your vids per day, I LOVE the quality and clearly measured way your videos run and you educate. It's obvious you put effort and thought into your delivery and organization.

Kanglar : THE TRUTH

nikoladd : Charging a 2Wh phone at 40% efficiency is somewhat wasteful, but charging 50kWh cars at 40% efficiency is extremely wasteful. No grid in any country can handle that as of now.

sim61642 : How about put the phone down and deal with your smartphone addiction problem instead of finding ways to feed it ! .

sanjuansteve : Great video! We should focus more on efficiency.

JulianChee : Wireless charging in this form is overrated. You can’t hold up your phone while wirelessly charging it

Von Neely : I'm curious as to how Apple is going make sure their wireless chargers are incompatible with anyone else's.

Gnome Watcher : Go Nuclear. You're familiar with engineering. Why do you consistently choose the impractical use of unreliable energy?

brian whittle : I'm glad you brought up the wastefulness of wireless charging, for big devices just plug the bugger in or have plates that raise to connect.

jeabo0adhd : Some ferric core transformers are 95% efficient. Air gap transformers can be helped by increasing the frequency and narrowing the distance between the coils.

Nightstalker314 : Can't we just focus on wasting less energy?

Poker Snob : Why the first 73 Seems odd?

Felix Damm : clickbait much?

Chounoki : You worry too much. People who can afford iPhone X and Tesla are not average people. These people don't give a shit about efficiency or excessive consumption, because that's exactly what luxury means: WASTE as much as you can afford.

EightNineOne : Hey Brian, this video has spun me off into the Hydrogen vs Battery debate for the last hour. And given you've addressed the energy consumption cost of electric vehicles, I'd love to hear your take on battery vs hydrogen fuel cell/combustion argument. I've bee quite skeptical when it comes to battery powered cars, mostly due to the inconvenience of charging, low ranges and longer term, the energy density of lithium cells vs something like hydrogen (Or petrol I suppose). I'm just not quite sold yet and I'd love to hear from you.

Daan Sloots : love your channel because i always learn something and love your voice. gods blessing and pls stay awsome


Guglielmo Ferranti : Nice video as always, BUT! There's one major thing that's bugging me as i was very intrested in the problem of efficiency. You did not say what the efficiency of a traditional charger is! Without a reference or comparison numbers are completely meaningless. I don't know how bad it is compared to what we have now, and that is the relevant question. Cheers!

aceyage : So let's go build some Thorium-based nuclear plants!

dil The pickle : I’ve seen stores with charging stations, but usually no one uses them out of fear of loosing their phones.

iRx Destiny : we need fusion energy, and then all the energy problem will be fixed

Kyle Li : My dream is to build a completely wireless smart house, smart doors charged wirelessly, smart sinks, smart chairs etc. all without wires to power outlets. I imagine being angle to wake up, roll into a chair, say Okay, go to the bathroom, open up bedroom and bedroom door, and turn on sink. Without having to touch anything.

John Le : You have officaly became my favorite educational channel

North Star Ken : Inefficient this, inefficient that. Too long did not watch: Wireless charging is cool but guess what? We don't have the resources for everyone to have that right now. I did not know this. No wonder petrol powered cars are better in just about every way - they're simply more efficient when it comes to everything including cost. Especially cost.

xoid x : i just ordered a wireless charger from amazon and came back to youtube and this video poped up in my subscription box ... strange coincidence :o

whoeveriam0iam14222 : wireless phone charging seems pretty useless to me. you either plug in your phone or you plug in the pad and your phone can slide off that the problem with electric cars is that if you're not rich enough to have your own parking spot you can't charge your car at home

आदित्य Aditya मेहेंदळे Mehendale : I use wireless charging on my smartphone. Wouldn't have it any other way. It's about the convenience of not having to plug and unplug the phone each time --> No cords to break --> phone lasts longer. Offset the "wasted energy" costs against "longer smartphone life" and suddenly the 25% wasted energy is won back many-folds.

Joe3D : The problem with inductive charging pads is that they generate a strong magnetic field over a great distance which is not good for health. Magnetic fields have to be always contained.

George D : I think that being able to wirelessly charge my phone is simply amazing, and I have gotten so used to it that the lack of it would be a deal breaker for future phones I would consider. Firstly, I am not a heavy user and my phone (a nearly two-year-old S7 Edge) regularly lasts me around 70 hours between charges. I have a wireless charger integrated in my bedside lamp, so I just put it down before I go to sleep and then simply pick it up in the morning, no hassle at all - no wires, plugging and unplugging from the wall. I honestly don't even know where my standard charger is right now, I haven't used it in a long time.

Mohamed Mokrane : When I click the bell 🛎 icon for this channel, it says Error 404

AnarchistMetalhead : if you are using electricity generated from coal the power plant itself is just barely more efficient than a regular combustion engine, but will soon be overtaken. should you bring up wind turbines to make you feel green, the unpredictable spikes of wind electricity necessitate that any grid using those has coal power plants for balance, burning on small flame without electricity generation constantly to be on standby, with the exception of grids with large, unutilized hydroelectric capacities. so in most cases nearly no advantage over direct coal use. with an induction efficiency of 60%, an electric motor efficiency of 80% and 15% loss in the power lines you now have just 41% the efficiency of a combustion engine, in the worse case of just 40% induction efficiency you are down to only 27% the efficiency of combustion engines, so you need to burn almost 4 times the fuel. This ignores the higher weight of the batteries, which obviously requires extra energy to get moving. So even if you ignore the environmental impact of the raw materials used in batteries having to be mined, and at some point disposed of, as well as the significantly greater energy required in production compared to conventional drivetrains, people using electric cars have a much greater environmental impact than people using regular cars

Dimitri Sanchez : It's funny how we are jumping into a "wireless" future without even considering the health consequences. I truly believe that this post 2000 generations will have the highest rates of cell abnormalities ever in human history.

jan harald : THE single reason why people want wireless charging: broken cables and to a lesser extent, broken ports (if you're using it for years)

Romuel the Knight : It is through things like this that climate change will most likely be resolved in bulk. People want stuff that's useful, cheap, and efficient which science and the free market are happy to provide.

Jake Maningding : I'm using ultra low brightness on my moto G5 (basically the dimmest setting) . You can't use high contrast mode (impossible to see during daylight hours) but you can use brighter background to compensate.

Sumith Bhat : Razor uses this tech in their mousepads. Induces ac in secondary coil inside the mouse, full wave rectifier coverts it into dc and then stores charge in a tiny capacitor. Wireless, lightweight just perfect. Except its overpriced considering how simple it is :(

Hector Diaz : I'm still confused as to how this witchcraft works.

Sam Host : Is wireless technology good for health?

Cupcake hero : Wireless chargimg seems like a great theory but in prictical use it takes almost twice as long with it enabled But for the wireless cars i was wondering if they could not use heat energy generated by the sun+the heat from the asphalt cause the get really hot can someone tell if thats a good alternate power source plz

Yu Xin : I have read about the situation when wireless charging become ubiquitous in a sci-fi. But the assumption is when nuclear fusion technology is mature that humans have unlocked the unlimited source of energy, which they don't care about the wireless transmission loss.

MrKlswe : Beaming power will cause major EMC problems anything other then well built inductor chargers will never get CE approved.

Scopolamin : Energous is the future!