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Next thing you know, in the future we start asking: *”Can I get your charger password?”*
Underrated comment. lol
Apple migh do that
Don't say to Apple that
lol
Delete this before they see this
I'm curious as to how Apple is going make sure their wireless chargers are incompatible with anyone else's.
Jami Animations Yes because they won't need a Thunderbolt charging port. Simplifying the design.
Their devices can be charged with any wireless charging pads
LOL! #Winning #PCMasterRace
Merc E.Z. Your PC has wireless charging? Nice!
Supercharged having I wireless pc sucks, its basicaly the same but you need double the energy to power it up, its like celebrating for paying 20 bucks for the exact burguer you use to pay 10
Now: *plugs phone into wall 2035: *walks into house *CHARGING*
There's no need for a battery at that point. There was never a need for a battery. The technology was vaulted long ago
I'd be surprised if that was the case, and if it is the case a house would need to be a Faraday cage, as would clothing, and you'd essentially be wearing a tinfoil hat at all times. The technology for truly wireless and efficient power transmission already exists, and has existed for quite a long time. The problem is that the technology is inherently incompatible with our biology due the transmission frequency in the ELF range. ELF causes a whole bunch of problems with insect/bird navigation, as well as wreaking havoc on hormones/mood regulation/Circadian rhythm/etc.
2050: *goes outside *charging*
But you still need a battery when you're in the sticks.
Disney has a room that has a pole in the middle with a current so that no phone can run out of charge in said room without even plugging the phones in
You know what I miss? The copper pads on the back or bottom of old PDAs so you just dropped it in a cradle, it aligned itself using physical forces and stuck a couple pins onto the pads. Simple, easy, and more efficient than wireless.
You can still buy that great technology if you buy and use a Sonim XP8 Smart Phone (Android). It's also a ruggidized industrial grade phone, with many features you can't get on name brand phones like iPhone. You can also buy extra batteries for your Sonim phone, and swap them out as needed (just like my old Blackberry phones).
Yeah, bring these back instead of this wireless shit. The only wireless thing I use and like is wifi because you can't connect ethernet to a phone and it is practically impossible.
@@_GhostMiner Belkin makes usb-c/lightning to ethernet adapters, although funnily enough people are mostly using the usb-c ones for laptops without ethernet ports.
Technically those aren't *great* since they're exposed mains of a electronic, and they have a ease of tendency to get worn out, making connections difficult or shorting out the entire device very easily by just touching metalic things. I assume that's the reason behind all devices changing to cords
@@ybirch9735 Been seriously tempted to get a Sonim phone. If only for the durability, as im very rough on phones even though i try not to be.
Doesn't need to carry a charger , oh I'll just carry my desk with a built in wireless charger
Lol
did he say a power rectifier? did he mean a *FULL BRIDGE RECTIFIER*
Most of these devices utilize half-wave rectification (located in the usb charging plug) to save on costs.
@@interupt0 it was a joke
Whoa there, Clive.
Boom
*RECTIFIER MAN*
Wireless Charging in one word: Inefficient
The charger that you already plug into the wall is inefficient.
@@TechRyze wired chargers are about 90% efficient compared to wireless charging which is realistically about 40-45% efficient.
@Jan Boreczek exactly this is wire it will likely always be inferior to transmission via wire conductors. This is currently mostly a fad of being “modern and convenient”.
@@TechRyze Except that the wireless charging part is downstream from that charger. So you need to compare wireless charging with the wire, not the charger plugged into the wall. The wire itself is virtually 100% efficient.
Yeah it’s pretty frustrating to think that apple has removed a power brick claiming to save the environment yet is pushing wireless charging which is just less efficient. One thing that’s a bit misleading in this video, a majority of wireless phone chargers run off a 5V USB connection still, not the AC from the wall. So they still include all the inefficiencies of normal charging with an extra DC to AC and AC to DC conversion. If they could use the 50Hz AC power from the wall directly to the coil on the phone you could actually charge more efficient than using the USB cable. Texas Instruments have been working on 50Hz AC chargers but the end device would have to support it.
Sex robots, driverless electric cars, wireless charging and colonizing mars...here we go bois aliens will notice us now
Finally
Aliens have noticed us. We just failed to free them from Area 51
Hey that rhymes sort of
@@MoStLy1aWaKE Not this crap again.
What if the really advanced aliens learned how to solve their technical problems with better civility and culture, rather than better technology? We care a lot about how we improve our tools, but we care very little about hiw we improve our thinking; journalism, criminology, jurisprudence, and civil law have not advanced much since the 19th Century; they have only become more complex and costly, to the point that they are practiced almost exclusively by experts. Technology however, from Smartphones to Ring, is everywhere.
This affects 'current' technology ;)
Jay Perrin i think I may have just died a little on the inside...
That joke is *Shockingly* bad...
Haha he said it, I just added emphasis :)
Boooo get off the stage
That joke has *potential* you know.
The only problem is. Can we put our phones down long enough for it to charge?
Nailed it bro 👌
If we have pads for charging in our cars, on buses or even on a backpack with reserve power then we might ....
😄😄
Sleep. Also I have a wireless battery. It charges, and then I can put it on my phone and charge while I’m using it
@@chrisbraid2907 there are, problem with the wireless charging devices is that they plug into a wall. So your phone is still bound to the same wire. Difference is that every time you pick yo your phone it stops charging. And with a wire it continues. I have a wireless charging pad. And i used it once. Its absolutely useless. It would only work if it worked from within a meter or 2 reach. Otherwise its completely useless
Wireless charging is very inefficient. Conventional transformers need complex laminated or ferrite cores to become efficient. With only air as the 'core' the technology is a poor replacement for a 99.9% efficient cable.
Polymerous ferrite interfaces may become a thing as the technology develops, having the benefits of an iron-augmented field without the weight and expense of solid ferrite. My understanding tells me solid ferrite is only necessary for high-voltage or high-current applications. Also, a lot of efficiency can already be achieved through electronic optimization, which the video touched on and is only starting to emerge in the mobile device world.
@@HuntingTarg By no means Wireless charging can be more than 60% efficient.
The cable might be 99%, but the charger itself that steps the voltage down to 5v is NOT.
@@TechRyze wireless technology is replacement for cable, not charger. Same charger is being used for both so no question here about charger's efficiency.
@@TechRyze Okay, but if you have 60% efficiency via wireless induction to start with instead of 99% of wired conduction, you still waste 39% to begin with regardless of your charger.
At this point, what really interests me is how efficient the technology is. I think we should all be concerned with how much energy we are consuming. Wireless charging is a cool idea but there have got to be better ways to do it.
kzhead.info/sun/aLV_lsWJiZp9gYU/bejne.html j
The only time I have wireless charging is in places I enter and leave often but don’t need to pick up my phone: namely my desk and car. Otherwise, wired is better, both for charging speed and the ability to actually use your phone while plugged in.
Vehicles have them sometimes as a standard feature. Not every modern device is capable of wireless charging. Probably wont be more common for another 5 to 10 years.
For phones and small devices, its a matter of framing it in a more practical manner. The video cited that all phones being wireless would increase grid load by 23 GWh (23,000 MWh) per day. This sounds like a lot until you realize that global energy consumption is 62,500 GWh per day. Everyone using wireless smartphone chargers would be a 0.037% increase in electricity use. that is less than a 1/2500 increase. Wireless charging for cars however is an awful idea.
If you can build an inductive charger into a parking lot you also can just build an automatic cable connector in instead. Inductive charging might have a little less moving parts but the inefficiency is just too big to be viable for widespread use.
@AllRandomThings Actually, inductors mainly consist of copper wire spools. So its probably a zero sum game at best.
lol they should have a big plug on the front of the electric car and a receiving port on a pole . So all you have to do to charge the car is ram it into the pole.
Super robot Knuckles wtf
Lol, the Chevy Plug! That would be awesome!
Sounds too sexual don't you think ?
Honey I'm home! *RAMS
This person is smarter than Einstein
This is the first of your videos that I watched. I've subscribed and hope to watch more in the future. You've done a pretty good job.
I can charge my phone with wire in 1 hour while wireless takes about 3 hours so for me it's unnecessary investment to buy wireless charger Another benefit of wired charging is I can still use my mobile while charging .
I have a wireless charger that charged my s9+ in 1 hour.
get a bluetooth headset.
One plus 8 pro new wireless charger is fast
Mine is 1 hour to charge and 15 hours
The wireless charger has to be connected by WIRE to a charger!
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.
Reasons I watch his videos: 1. Accent 2. Accent 3. Accent 4. Interesting content 5. Accent
whats wrong with the accent ?
Benhard Sim he's saying it's nice
I agree with you, I have trouble with English but with his accent I don't know why but I understand
His accent is pretty grinding, but maybe that's just because I live to the North of Ireland ;)
This guy has an accent. Which means they can't be trusted. #Electroboom!
Your Chanel is one of my latest foundings at youtube and it's like my new favorite series.
Nice to see that they are working on induction charging (for cars), I've mentioned it a few times and no one seems to know anything, but apparently it's been in the works which is good to hear. On phones though, it restricts the movement in the same way, if not more because it's harder to move the pad with the phone, and putting it in is hardly any less convenient, so those don't even seem necessary (they're neat, but that's about it)
Props guys, I'm an EE student at a renowned University and we are working on the topic covered here (we're doing a bit better then DOE currently). I am completely surprised at the accuracy of the info here and thank you for informing people.
This video is old, but. Can you help me understand efficiency here 5:10? what/who is the competitor?
A4WP: www.electronics-notes.com/articles/equipment-items-gadgets/wireless-battery-charging/a4wp-wireless-charging.php
Thanks
Shut the fuck up, dumbass. “Renowned university” you couldn’t be more pretentious if you wanted to be. You’re probably a high school drop out.
@@redbloodedamerican2743 lol you sound like a dropout jealous that he’s from a prestigious school, not him
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.
5:45 wtf there is wire right under the phone whats the point of wasting 60% per 1cm ?
StarzzDrak agreed, in this age when resources are becoming more scares. It seem perverse that we’re going down this route. Yet another example of big business putting profit before ethics:(
of course, there's a wire, where do you think the wireless charger gets the power from? ;) But I agree if there is a need to have a cable, why just don't plug it right in the phone.
@@davidgatherer2073 I couldn’t care less if a business makes profit, good for them, good for the economy. A free market is the most efficient at utilizing scarce resources. This is simply an example of people once again being absolutely fucking stupid. This will continue to be stupid until it can beat the efficiency of wire conductors, which is improbable due to the inverse square law. This is all ironically in the age of environmentalism where governments are banning plastic straws and bags lmao. This is currently nothing more than a modern fashion statement.
@@davidgatherer2073 Agreed, if anything we should find ways to be more efficient instead of squandering it for minor conveniences.
There is one advantage and my mom currently relies on it. It will work even if you're expensive phone's charge port doesn't (she should really get it replaced but the way she works plus the whole Covid thing makes that very difficult).
or you know, go back to removable batteries and just have a dock to charge an extra one man i miss my galaxy beam
You sir, are an imbicilic dinosaur.
But then my phone won't be made of shiny glass even though I keep a case on it.
I still have phone with removable battery I have 2 batteries just remove the drained one and replace with charge one
you could get one of those battery pack phone covers to have 2x the battery
@@Bizarro69 Why, because he has preferences? How incredibly privileged must one be, to take offense at other people's choice of smartphone.
love your channel because i always learn something and love your voice. gods blessing and pls stay awsome
Steven Utter *tips fedora*
Daan Sloots And he gave us a *Face Reveal* . 👍🖱📡💡📲♻️⚛
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 brilliant.org/realengineering/
Real Engineering Okay
Thanks mike
Clearly we need massive EM fields close to our human bodies 24/7/365.
Stupid question. Does the wireless charger lose current, energy or whatever if there is no device being charged? (while the charger is on)
what about influence on brain of electormagnetic waves?It's huge! Especially using long distance (1-2m)wireless charging. The brain will be boiled like in microwave oven.
0:21 Me: Do not go gentle into that good night! Rage, rage, against the dying of the light!
* Interstellar theme song begins *
:'(
Laziness
You don't look so bad for pushing 120
The only reason I’m willing to part ways with the charger port is to improve the waterproof capabilities of phones. I wasn’t ready to get rid of the audio jack but I’ve since caught up
Gonna want USB connectivity either way, so let's keep the aux
@@irok1 yeah, file transfer would be a pain, especially any kind of physical backup
I will always want a audio port even through the dongle apple won’t ever get rid of the port
Logic is simple; any mobile device (smartphone, tablet, laptop, music player, e-book) can still be used and charged at the same time while it was plugged to a power source. On the other hand, devices cannot be used effectively while being charged wirelessly since you cannot detache them unless you are okay with charging disruption. Just get a longer cable which can be extended and shortened.
logic. use the wireless charger when you are asleep . . makes this all a moot point.
You missed the point of wireless charging. All the times you set your phone down it could be charging.
Exactly Kram. ! Esp when you are asleep. ..I assume most people do sleep right??
And of course with all that EM RADIATION everywhere from the millions of wireless chargers you are being COOKED slowly as well leading to health issues.
REA987 kartal gol gol gol
For mobile phones it might look as a high overconsumption in MWh but if your consider a fraction of the total consumption it's nothing. About cars, to loose only 1% efficiency would have more impact than all mobile phones together, even 90% efficiency for a 20kW load it's awfull and will overcost soo much. Induction for mobile phone, of course, for cars, never!
For cars it would be enough when two pins pop out of the ground to charge it
@@bekr3473 Tesla had something similar to that 8 years ago, but decided not to use it.
You and all of your upvoters get the award for lacking the comprehension of scale. Mobile phone's growing data usage and the corresponding charging is incredibly wasteful and unnecessarily indulgent. My LiFePO 4 battery can jumpstart a V-8 engine 22 times (advertised as 25, I tested it) before needing a recharge but will only charge my Galaxy 10 phone 1& 1/2 times from 10% to 100%. Hypocritically scream and rant about excessive carbon footprint yet using far more than necessary without a second thought. Narcissistic wankers the whole lot.
Engineers should have to get English degrees if they want to be engineers just so that they don’t have to learn MMA.
kzhead.info/sun/aLV_lsWJiZp9gYU/bejne.html j
Hi !! Thank you for such informative video. Can you please explain a little about Wireless power transfer in case of powering LVADs - what are future prospects and challenges ?? It would be a great help to me if you could demonstrate a bit in this regard.
3:33 Holy cow those pancake coils are a work of art. Not all connected together, wonder how that functions.
those are just to cover more area so that phone/device can be placed anywhere on charging pad.
I used the Palm series of webOS mobiles, and the wireless inductive charging is something I miss to this day. With a magnetic, wireless dock, my mobile was not only always charged each time I picked it up, there was never a need to fiddle with wires. The best part of it, is that the mobile became an ambient display, always showing photos and social media like a smart photo frame.
I feel like it is just a waste of elctricity to display something 24/7 that won't even be seen all the time. Just buy a picture frame.
@@unliving_ball_of_gassorry I like seeing the pic of your mom and me raw dogging
Tesla was a freaking genius
Tesla was a nutjob....
Didn’t he marry a pigeon or something? Someone correct me
@@JellybellyWaffles He tended to wounded pigeons, which probably led to that rumor
@@JellybellyWaffles he didn't marry with them but near his dead he was started hating people because they were only wanting money so he started love pigeons and making inventions for them.But he was loving a one white pigeon like his wife...
FourDollaRacing Edison was a thief
“Into technology, and beyond!!” Love that lol
Hey, great video, and as an aside, your Brilliant sponsor segment was actually good and I watched it completely, which I never do with other creators.
Love your channel and videos. Its easy understand and enjoyable.
i undertstand the topics but wtf are these "kerrs" xD
1:30 The shown simplified sketch of the circuit bothers me. The battery provides DC, which would cause the volt meter on the other side to show a pulse upon connecting and then drop to zero. To transmit energy effectively you need AC as only a change in the magnetic field will induce a current.
What about sealed batteries that would explode without DC charging.
the circuit connected to the battery on the receiver side contains a rectifier that changes the induced AC current into DC.
@@manabouttongue Yeah but the input needs to be an alternative current or a pulsating direct current.
Excellent presentation!
Just wait! This will force change... Makes me excited for the future 🍻🍻
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.
nikoladd, exactly! Not to mention, I'm not comfortable near multiple 100kW almost-omnidirectional antennas. Yes, it's non-ionising, yada-yada. Still.
According to my information, wireless charging for electric cars can reach an efficiency of 90 % . Audi developed the Audi wireless charger, this system has an efficiency of 90 % www.audi.com/en/innovation/futuredrive/wireless_charging.html This system uses a mechanic device, which lifts the coil plate up until it has 1 cm gap between the coil plate and the car. Conventional cable chargers have more than 90 % efficiency, but they also don't have 100 %.
And its not just the wireless efficiency loss, EV's still require a rectifier circuit @88% efficiency.
That's true, the System with a cable has an efficiency of about 90 %, means from 10 kWh charged from the grid you have around 9 kWh in the battery to use. The wireless charger will cut another 10 %. But that's still a very high efficiency, compared to ICE cars. The engine of a gasoline car for example has an efficiency of around 35 % at the best, but in many situations the engine runs not in the most efficient rpm, and with lot of power available and only little power really used (for example powerful engine, but low speed) the efficiency decreases to 20 % or even less. Diesels are better in this point, but no combustion engine ever reached more than 50 % efficiency, while bigger electric motors can reach more than 90 %. The motor of the Model 3 for example (a synchronous motor with permanent magnets) has one of the best efficiencies ever reached.
+Simon Maier .. well no 90% efficient transmission does not include the signal preparation or received power management. So it's at best 90% to the transmitter, then 90% to the receiver then multiple frequency rectification let's be optimistic and say 90% again... so it's 0.9^3= 0.73% of the power reaching the battery charger. So even in your sci-fi version it's losing at least a quarter of the power. It's a big amount of power when it comes to cars. My point was not that EV's are bad, quite the contrary. My point was that a workable wireless for cars has a lot of problems to solve.
Just want to say this is extremely high quality content, well done. Thank you!
6:10 what up broo? You in Florida, love your videos.
I actually have tought many times about solar panels in space and sort of beaming energy to the earth. Really nice you brought it up. The big picture matters more than teslas and phones.
Some ferric core transformers are 95% efficient. Air gap transformers can be helped by increasing the frequency and narrowing the distance between the coils.
yup Qi is around 120 KHz. and they use ferrite pads In the T X and RX to shape the gap.
Megavolt Services LLC Maybe they could use some magnets to help direct the flux better like they do in brusless motors
perm mags would not really help. Infact it would add more lines of flux and * may * lead saturation however I am allwas open to a cheap test. I am more then willing to try some perm mags near and On a Q1 system.
jeabo0adhd comparing a pad to a transformer is like apples to oranges
Why not have a little robotic arm for plugging in a standard charging plug at the front of each parking spot instead of wasting power on inductive charging? Pull up and turn off the car, the bay-bot comes out of its shelter, reads the car's numberplate, so it knows who to bill for the power, and plugs a charging cable into the front of the car. Once it's charged, or you come back early and unlock the car, the arm unplugs the charger and bills your account with the department of transport for the power used. Same convenience, much less wasted power.
or just a two prong thingy that robot mowers use that is flexible.
Car charging is free in the UK, so you wouldn't even need a reader.
"Same convenince"
I have a better idea. A folded arm plugs itself in the bottom of the car and bills you by some sort of ID your battery is registered too or something like that. It would be way less expensive and for those who will say that you'd need to park perfectly just have it scan for the plug and move on over and plug itself in
I was thinking the same thing. In both cases the user (car driver) has to do nothing, which is the key point. I see no big hurdles. Heck, even our vacuum cleaners can already do this. It would require relatively little engineering. Only standardization.
You totally just got featured in a Popular Mechanics article about wireless charging 👏🏻
Really cool video man!
Great Video ,really enjoyed it. Not my favorite topic, but paid out in the end. It defenitly is up to your usual quality (shoutout to Mike) and I liked the twist with the efficency question, that is something I never thought about. It is a shame that KZhead is killing itself with its algorithm lately. Keep it up, I am always looking forward to your Videos .They are informativ ,very high quality , entertaining and I love your approach at these topics.
JoshXII Your comment says 10 hours ago...
Trispectre Thats when it got released on Patreon 👍
Glad you enjoyed!
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.
Mistake in the narration. We only caught it after I had left Ireland for a holiday.
Real Engineering Thanks you.
You're Irish? ;) :P
You could add a notation on screen just to avert confusion. Great video though! :)
Another mistake is "unmeasurably" instead of the correct "immeasurably" in that context at 1:59 but hey, Faraday made mistakes too.
A Tesla S = another house on the grid. Doubtful. Means my power bill would double if I had one. Doubtful.
Wrong lol
this channel is full of bs
Idiot run car or truck is 10cent to 30cent per mile. Electric car is 1 cent. Also no oil change/coolant/all the good stuff
Yeah, this channel seems to have slipped a fair bit in the last two years . Hope he doesn't go the way of Thuderf00t. Which would be ironic since the guy hates Thunderf00t.
I mean, I only pay like $50/month for power as is, so if you drive a lot it's probably fine
1:09 was trippy af! I thought it he personalized the video to fit everyone’s name somehow lmao
Fuk das trippy
Great video. I liked the fact you broke the technology down so the average person can understand it.
Wireless Charging saved my ass already twice just when the charging ports of two of my phones died.
Samsung phones? Yeah that happened to me too
Thanks for your great information 👍 👏 🙏
Hey! What's the name of the song you used in the background? Thanks! Also, great video!
KZhead STOP TRANSLATING EVERY VIDEO TITLE INTO GERMAN IF IT'S NOT A GERMAN VIDEO I SPEAK ENGLISH AS WELL FFS //hä wo kommen die ganzen likes her o. O
Omg I just thought that too. Aber "drahtloses laden" hat mich echt zum lachen gebracht
@@noel.friedrich xD
Ist echt so... If somebody knows how to turn this setting off, it'd be appreciated
@@neosabien6998 klick auf deinen Avatar. Sprachauswahl ist unter Dark Theme und über Settings :)
Matty L same but with russian:(
I was honestly expecting some sort of conspericy based on the title, but it is nice that it just explains how it works
So, the only place I heard about the efficiency context (from where to where) was in the statement "wall to battery". Don't we have to look more broadly at our transmission systems and see what the impacts of our changes are? I know there is some challenges with loads in the existing network and that much of the power network is pretty old and inefficient from what is deployed. Any thoughts on what can be gained there and how it might impact large scale electrical charging? Particularly, there would seem to be a big peak load issue with lots of cars being recharged during and after the standard commute window.
One of the lowest hanging fruit is shifting car charging to off peak. Ideally dynamically based on load but even a timer would help. Although even better is if workplace and shoo parking had chargers so you can charge during the say from solar. Even more advanced that charge shifting is vehicle to grid where the grid can control current flow in both directions to help with grid stabilisation. This is being trialled currently.
This is the calm before the storm of a the future we all have dreamed of...once it becomes widely profitable...I have faith that we will jump in head first...We are so close to energy efficient breakthroughs!
Wireless charging is extremely useful for businesses such as bars and coffee shops as it allows people to charge their phone with having wires sticking of tables which could be cut. I've seen both technologies used and can tell you the wires were broken a lot quicker than I assumed it would be.. and the pads are still yet to be broken. It's just a shame most phones at the moment don't necessarily have Qi technology built in yet.
Did he say "Tesla Model 3" and show a Tesla Model S? *TESLA FANBOYS TRIGGERED*
yep
I'm just wondering which one the data is actually from.
Yes. That's it, I want my money back.
This channel is OBSESSED with Tesla. They bring it up whenever they can. A company with an egomaniacal sociopath snake oil salesman who tries to rebadge inventions of others as his own.
@@guppy360 69Likes
We love your lectures bro
I liked a lot this old style of videos.
Great video! We should focus more on efficiency.
Based on the title, I honestly thought this video was going to explore the ramifications of generating localized electromagnetic field distortions and their potential negative effects on the health of the human body.
coolal19 No effects have been measured.
And that there aren't any?
You seem to misunderstand the difference between wireless information and wireless power. Wireless information transmission only uses enough power to make a readable signal, so it's power is low enough to have little to no effect on the human body. Wireless power transmission is used for the explicit purpose of transferring power, so it's much more powerful, and may even have a noticeable effect on the human body. Also, wireless power transmission has enough power to cause heat in the powered device. The human body isn't the best conductor, but it is a conductor, so proximity to a powerful charger can have adverse health effects. Not to mention any mechanical implant or prosthetic.
If Cornell University is a trusted source: arxiv.org/abs/0904.1198 "These resonance electric currents may cause necrotic changes in the tissues or blood circulation and in this way significantly affect the biological organism." And if 78 Steps Health is a trusted source (though not peer reviewed, from the look of it): www.78stepshealth.us/magnetic-fields/info-lcd.html "Those students who used only their natural ''magnetic sense'' had a higher success rate than those whose ''magnetic sense'' had been deceived by the field of a magnet attached to their heads (Baker, 1989)." And I am not limited to wireless phone chargers, as this video did point out wireless car chargers, and I said "wireless power transmission" not "wireless phone chargers". So use of more powerful magnets is relevant. Power transmission actively pursues more power, which information transmission does not.
don s Time and time again, you are forced to go with an "educated gut feeling" until the science is out. And by out, this might take decades or more. So it is not silly to have a critical mind of new technologies. Working on a cautionary hypothesis is a reasonable way of avoiding not certain, but potential danger. I am still all about cables. If I had the money to build a house, I would make cabled data transfer the norm in the house. A lot of people seem to focus only on "will this definitely give you cancer or not?" whereas there could be lesser effects that to some people are things to consider. Such as ambient noise, restlessness, headaches and so on, are these in any way affected by the increase of electromagnetic fields? They might not kill you, but they are things that affect quality of life. What I am always noticing is that the last thing engineers/scientists want to hear is someone on the other side of the fence telling them your technology is not 'humane' enough. I think it's to do with complete segregation between science and humanities ever since in the industrial revolution. Now we either have peace loving stoned hippies, or robots.
thanks for the clear explanation
Love how Nikola Tesla managed to light up 200 lightbulbs 40 km away wirelessly hundred years ago and today we are being sold all kinds of crap for so much money.
USB-C is so incredibly fast that unless wireless charging is somehow insanely efficient, i don't see the point. for those who are not in the know, my nexus 6p can charge from ~30%->100% in less than 1 hour.
C is rated to 15 watts. The latest Rev to the QI3 standard can do more then 12W . having both is a WIN WIN. Its not like the added guts to put
I dont think the efficiency is the main thing with wireless charging. I think its made to be convenient, it would be really nice to eventually just be in a room and have it charge my phone in my pocket.
I am fully aware. I am HUGE advocate for USB-C with PD3 . how does that massive current dump day by day effect batt cell lifespan any EE worth there salt knows dump charging is not good for long term lifespan. I advocate for QI as a baseline . Its fast enough to charge any phone and most tablets overnight at a 1-2 amp rate . Yall are getting 8 H of sleep right? provided you can get a day out of a charge then who cares If at night in your 8H of sleep your phone takes 3H vs 1.5 h... does that matter. VS Weigh in the wear you put on your USB jack . Is it cost effective to replace a $800 phone over a loss in % eff in charge rate. what is the envro damage of a useless bricked phone due to a ripped plug Vs the extra power needed to make up for driving a 90% eff QI charger. does any one weigh this as math. ???? The power to refine the silicon to make the chips. the power to machine or Injection mold a case . power to reflow the solder on to a PCB that takes power to cut ! Now lets talk disposal of the now useless phone and its effect on a landfill and last but not least the biz cost If I have to take time to buy a new phone and then take a day to Xfer the apps and get * settled in * how much is your time worth lets say the loss of lossy QI charge means over a year you pay $16 more in power. ( $16 buys a TON of kWH by the way! ) If I take time off of my day to buy a new phone . see my point.
I have an LG v20, whose USB C charging is pretty darn fast. However, its battery is removable, as batteries used to be, and should be today if not for greedy phone manufacturers and planned obsolescence. My v20 goes from dead flat to 100% charge in under a minute. No charging technology can ever beat that.
Goldenman Yeah, and slowly over time such rooms would cook your gonads. A variation on it sterilized my brother after 15 years in the field.
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
most pads seem pretty useless. wireless charging in a dock would probably be a lot more useful since you could use your phone at the same time. if its just a flat pad on the table then you cant really do much with it
biggest cone is the lack of effiency. you dont want to spend 200%(in watt/resources) more as an over all solution. its neat and nice to charge the phone this way. but a car or bus....... overoptimistic "green" people.
thanks for the feedback Sekou
I use it because its really fast and my phones port broke
Yeah a attachable batterypack that doubles as a phone case seems more useful
I found this very interesting even though I'm not a scientist working on inductive charging. Could we have a part 2 to this? Since it's been 5 years
So, if memory serves, power loss over distance is a square of the distance (sort of). I am kind of curious about the efficiency difference between rf and light based power distribution would be. Is the loss characteristic from propagation pattern mostly, or does the medium of energy transfer make a difference? Along that line of reasoning, if incorporating agile (highly directional) antennas, could they be used to create a focused beam for charging, possibly cutting the loss of efficiency? The goal for use in controlled environments, such as a home, where parking can be completed consistently in the same spot. I know I can go research this, but right now I am working on other research topics in a different field and feel that others might be interested is taking this up, if it makes any sense at all.
3 words. GENIOUS NIKOLA TESLA
tonydaletony did you spell Tesla wrong on purpose? Big booty latinas are one of my favorite tho
Nikola Tesla is ❤
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
believe it or not, google/internet services tracks what you do to show you things that they think will interest you!
Very interesting article, thanks. [Looks like Tesla might have been reincarnated as the keyboard player in Sparks. Ideal band name too.]
Appreciate the video do you happen to know the name of the piano songs in the background while avails way ever again
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.
That's just as easily solved by having charging pins instead of a plug.
You can get magnetic plugs, where you leave the small part in the phone all the time.
"I wore out my USB port" You broke your USB by placing lateral strain on the connector or possibly with imprecise plugging and unplugging... not because you were charging it while it was plugged in. A better way to solve that would be to improve the connector.
"A better way to solve that would be to improve the connector..." ...or tell the people how to properly use this incredible complcated thing called connector.
we need both, there is no reason to use mini usb at this point cport is the best option since its idiot proof, the end user will ALWAYS fuck things up somehow. so use a better connector AND make it harder idiots to brake it, win win
I wonder if the earth sometimes makes fun of the moon for having no life?
Kadoc Great joke there xD 100/10
Kadoc i wonder if youve skipped english class
troll gaming IL Oh you know, when English is not your first language ;)
Kadoc no shit sherlock
troll gaming IL why are you being such a douche?
Maybe I’m just tired but I think it’s amazing how 10 years ago driverless cars seemed like a pipedream but now we just refer to them so casually. In the 1960s they viewed driverless cars as magical, but now it’s almost become a standard.
5:30 Yeaa but we should expect the efficiency to improve over the years and decades.
I *LEARNED* something today!
This video seems to be the only video to explain wireless charging with animated diagrams, which I needed to understand the concept. So awesome job there, thank you. Everyone else just talks about this stuff like I am supposed to understand what it means. For anyone who wants to know how wireless charging works, skip to 2:22 and only watch the animated diagram parts, the rest of the video is kind of needless.
I have a question. On what resonant frequency this wireless chargers works please? Is it safe to charge smartphone with it close to bed during the night? Is it something like WiFi transmitter? Thanks.
I have an ancient Galaxy S7 and just recently my charging port got screwed up to the point to where i could only use 1 wire that i bent to where it wont fall out of the phone, and i have to plug it in very delicately and at an angle for it to even work. I realized i had a new wireless charger laying around and started to use it and it literslly saved me from having to get a new phone. It doesnt charge quite as fast as my fast wire charger but still does better than if i pluggee it into a standard, non-fast charger. Really cool technology if you think about it.
5:15 59.4% efficiency!? Heck, I'm not that inconvenienced by plugging stuff in to charge! You've forgotten to mention that Nikola Tesla sought to create long range wireless power transmission, and died trying to improve the significant inefficiency. I will take his valiant attempts as a sign that wire power transmission is the way to go. I wouldn't be surprised if smart cars are able to plug themselves in to a socket soon. :P
thats the problem, Joseph Dickson, and 60% efficiency i believe is already pretty close to the practical limit.
40%~60% efficiency means multiplying total power consumption (and power bill) by 168%~250%. Sadly, I think most people will plug in the electric vehicle to save a few dollars every night while they also won't bother with the inconvenience of plugging in their mobile device to save a couple pennies.
If a roomba can.. would it be somehow a matter of upscaling? I don't know.
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.
Just got funding for hydrogen doc. Will be starting production on it soon
Real Engineering Amazing! I can’t wait!
Hydrogen batteries are amazing with the only waste product being water however there is one major problem. The means to obtain Hydrogen would be less clean for the enviroment then gasoline would. It within itself would be great but we dont have a whole lot of means to get hydrogen efficiently and cleanly.
+Tired Poison true
Yeah, I’ve been doing some reading and it really boils down to the economics of producing hydrogen and how far we’d need to go to make it viable. from what I see, if you’re producing hydrogen via electrolysis you’re better off just putting that electricity straight into the car.
Great video! Thanks
The idea thing here would be for a feedback mechanism in the inductive charger for cars. Car pulls up, signal sent to charger to start charging, Charge pad starts charging, when battery is full, Wireless signal sent back to charge pad to shut off. This would be the least load on the utility network in my book.
What would happen if someone with an internal cardiac pacemaker implant were to walk over a section of street which had an inductive wireless charging circuit below the pavement in a parking spot meant for electric vehicles like the one shown in the video? Would it just charge up the battery inside the pacemaker? Or, would it overload the circuits in the pacemaker and kill the pedestrian? Thanks for another great video Real Engineering!
Every modern electric device has protection to overcharging. He wouldn't die.
Anodyne Melody from what I know of pacemakers there is no battery
He will become John Travolta
@@garrettwright4337 There must be batteries, how else you think it is gonna beat your heart if it stops?
Yeah, of course there's a battery! Once installed the pacemaker is in a relatively easy place to access as the battery needs to be changed every 10-18yrs depending on how active the person is. Those car chargers don't really affect people because they're not always on, however metal detectors can have an affect on pacemakers. That's why they need to be wanded seperately.
Efficiency is Bae (edit: and by "Bae" of course I mean good)
Practicality is...
Why not both?
hope your comment gets deleted
*bad. Very bad.
Festive respect tracking Fancy Fedora Are you saying that efficiency is shit?
Your realism can be 'bubble bursting', but the rare times that you talk something up, I believe you. I'd love to see a 'TED Talk' audience react to you, it would be a real shock for them to hear something actually supported by the science, as opposed to hubris and hyperbole being projected from the flimsiest evidence. Keep up the good work. I've 'Subscribed' now for only the third time (?). You seem to know a lot about other KZheadrs fortunes...Do you guys all secretly know each other? You live in TubeTown don't ya?
I imagine some way of getting the charging coil to move up and get right up against the inductive coil it could improve efficiency. But without integrating the windings as you find in a transformer efficiencies will always be lower. Inductive charging is convenient, but that's about it. I wonder if you had one at home it might hum loud enough to keep people awake at night, or rattle the silverware in the kitchen drawers!
I’ve seen stores with charging stations, but usually no one uses them out of fear of loosing their phones.
this. these people who are going on about all these public charge options arent really thinking about practically applying these ideas in a world where free public utilities are always very poorly maintained (or even vandalized) and using them is risky at best. and honestly, do people really think they might one day be able to charge their battery while sitting at a red light? like, oh yeah, just because we can now charge things wirelessly, the city is just gonna start handing out free power at redlights. pure fantasy.
Speedj2 no one expects it to be free. You'd pay for the power the same way you pay for everything that anti-government people try to pretend anyone thinks is actually free - with taxes. Like the taxes you pay when you buy a car, or register a car, or pay your electric bill, and so on and so on. Those roads everyone is driving on today? When is the last time you wrote a check to have it resurfaced or chip sealed? Never. Are they free then? No. They're paid for with taxes just like everything public. Only a moron would pretend anyone thinks this would be any different. Come back and join everyone in the real world.
Why can we just have removable batteries to change our. ..grrr
Apple profits.
There are plenty of decent phone models out there that don't support designed obsolescence
Pepper LePew Pretty much all mobil phones used to have that 20 years ago or so...
Stefan Sjöberg bring several batteries.. grrrr
this ain't xbox bro
Im thinking about building a small wireless charger for the car that uses the common popsocket phone attachment as a mount for the charger. So you can just fling it into the mount and charge your phone/ have gps at the same time.
So I have been pressure canning with my All American(the big one) & was wondering about water bath canning. Can jars be double stacked for WB like PC? Would something like a crawfish rig(pot/strainer) work?
You showed the Model S while you said "the Tesla Model 3" at 5:59
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
Not really, since cars aren't big enough for that to be useful. There's a limited amount of energy the sun can irradiate per surface area (even on a sunny day), and solar panels can only extract a certain percentatge of that energy (usually 30-40%). The area of the roof of a car is too small to make a difference in battery consumption. There are also further problems like wheight, complexity, exterior desing, etc. The same goes for extracting energy from the asphalt, except that it's even harder and less efficient.
because of the losses involved. wasteful.
You can't create energy with heat, even though heat is energy. To produce usable energy, you need a heat DIFFERENCE. The energy you can use is relative to the differential between the hot and the cold. Cars do get hot and so does asphalt, but only when everything around them is also hot. That makes it not a viable energy source.
I watched this just to know how my Note 9 charged but I get so much than what I bargained for. Subscribed!
Change is hard, and innovations don't happen on a daily basis. The fact that mankind started to think about sustainable energy sources, and dared to take initial steps is amazing. Once we decide and start working on a project, it's just a matter of time to make it a reality and a norm eventually.