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Gov't Researchers Develop Wireless Car Chargers That Are Faster Than Plug-ins (computerworld.com)
An anonymous reader quotes a report from Computerworld: The U.S. Department of Energy has demonstrated a 20,000 watt (20KW) wireless car-charging system that offers three times the efficiency of today's plug-in systems for electric vehicles (EVs). The research is the first step in creating a 50KW wireless charging system that may someday allow roadways to charge vehicles while they are being driven. The DOE's Oak Ridge National Laboratory (ORNL) in Tennessee demonstrated the new system in partnership with Toyota, Cisco Systems, Evatran and the Clemson University International Center for Automotive Research. ORNL said the 20KW charging system for passenger cars is the world's highest power wireless system. It was developed in less than three years using a "unique architecture that included an ORNL-built inverter, isolation transformer, vehicle-side electronics and coupling technologies."
Just don't let your cat in the garage or it'll lay on the warm inductive plate and get crisped.
Captcha: E scrote
err.
Excrete, my bad.
A Tesla charger has an efficiency of over 90%. If this charger has an efficiency three times that, then it should be above 270%. Maybe it can feed the extra 170% back into the grid.
The actual quote from the article is " achieved 90 percent efficiency at three times the rate of the plug-in systems commonly used for electric vehicles today.", not three times the efficiency. They're comparing the charger to a typical home charger. Which is meaningless since the system isn't limited by the connection to the car. And think about it. 10% loss of charging energy so you don't have to go to all the trouble of plugging it in? What a waste of our tax dollars.
Can't find any clue as to what frequency is being used for the charger. The prospect of 50 kW of power in your garage or wherever is worrying, despite being "well shielded". Even if it's a lower frequency (in the kHz range), there will be harmonics all over the spectrum, putting radio amateurs and anyone else using sensitive radio gear in a bind.
Fiat Lux.
The wireless charging system is not faster than all plug-in chargers, just the ones commonly used at home. The charge stations available commercially are faster and the article mentions this. It is also not three times more efficient, it's 3x faster than the home charging systems. It's 90% percent efficient, which is impressive but I seriously doubt any charging system is only 30% efficient.
Think globally but act within local variable scope.
There's an abundance of research showing that strong electric and magnetic fields can be hazardous.
No there isn't.
It's also been shown that too much exposure [to MRI] causes cancer.
Total BS.
I can't wait until the patent gets handed off to somebody to profit from.
Hi! I make Firefox Plug-ins. Check 'em out @ https://addons.mozilla.org/en-US/firefox/addon/youtube-mp3-podcaster/
Who said a MRI is dangerous? Thousands of people have them every day with no increase in cancer risk.
If you bring a large chunk of metal in to the room then sure it's dangerous but that's more to do with the metal flying physically towards a magnet rather than cancer.
Yes yes, terrible summary.
The 'fun' part is the 10% coupling waste (versus I would imagine much less than 1% for plugin charging).
Remember, we are not talking about the battery charge efficiency here, their 10% is just for the transfer of power to the car..
So, thats 'only' 2kw continuous loss. Thank god everyone is converting their houses to LED lighting, which still wont
offset the losses here.
Go Progress!
If it is wireless, it is NOT EFFICIENT.
50kw, or even 20kw is extremely dangerous to couple. Outside of the leaking RF spectrum possibly interfering with electronics, the danger is something with a similar resonant field could be nearby and absorb some of that power. Even just a few tens of watts could start a fire. They probably need something akin to a gfci circuit that monitors the power in and out precisely and if something is absorbing power that shouldn't be, notice the discrepancy and terminate the charge.
The actual picture is pretty funny, with a ginormous briefcase put under the back of the vehicle, a mere 2 inches above the similar unit embedded in the floor. No way is that remotely practical, they would need to increase the air gap by at least triple, to 5x+ to properly mount it under reasonable vehicles. To keep the same coupling, the size would then have to be increased substantially. Further there is no way in hell that is working while you drive, it has to be precisely aligned which isn't going to happen period, even at stoplights. I could see it embedded into a garage stall, or even a parking stall outdoors, perhaps, but alignment would be a major issue and one that is not being addressed at this stage from anything I can gather.
There's an abundance of research showing that strong electric and magnetic fields can be hazardous.
Bollocks.
Biological Effects and Safety in Magnetic Resonance Imaging: A Review
Since the introduction of Magnetic Resonance Imaging (MRI) as a diagnostic technique, the number of people exposed to electromagnetic fields (EMF) has increased dramatically. In this review, based on the results of a pioneer study showing in vitro and in vivo genotoxic effects of MRI scans, we report an updated survey about the effects of non-ionizing EMF employed in MRI, relevant for patients’ and workers’ safety. While the whole data does not confirm a risk hypothesis, it suggests a need for further studies and prudent use in order to avoid unnecessary examinations, according to the precautionary principle.
Keywords: electromagnetic fields, Magnetic Resonance Imaging, MRI safety, genotoxic effects
Who said a MRI is dangerous? Thousands of people have them every day with no increase in cancer risk.
I don't know about cancer but MRIs are not harmless. People have been killed/injured by magnetic quench and RF heating of undetected foreign material.
Neat stuff, I'm sure. But transportation fuel will always be in the form of liquid molecules or solid anodes that are made in big factories in bulk at much higher efficiencies than possible with electrical transmission and run air-breathing engines with designs that don't need to pack fuel and oxidizer in close proximity. Unless you let the fully-baked hippies try to wish physics away with half-baked tree-hugger politics, that is.
It's also been shown that too much exposure [to MRI] causes cancer.
Total BS.
Then why do radiologists always stand behind lead-lined walls/glass when they operate the machines?
As an added bonus, this system will cook any road-kill to perfection. Even cows! Moooooooooooo Cows! You're all a bunch of cooked road-kill cows! Mooooooooo!
It is safe when used safely by a professional without negligence. It isn't safe when used by anyone. If you can't trust a 4 year old with it, you need to either gate it off or keep making a better design.
Jan 1982?
Just because we protected the child rapist doesn't me we supported him.
U suk
Despite the anal rapes, Sandusky did more good than bad.
And Joe Paterno knew about it, but decided his legacy was more important than protecting children from anal rape.
I think they usually monitor the procedure in real-time, adjusting the area being scanned, etc. I can't imagine why having a computer in the same room as a 1.5T superconducting magnet would be a bad idea...
Only crack the nuts that crack. You don't put the ones that don't crack in the sack.
Exactly. We did more good than u'd think despite our history of protecting child rapists.
Sandusky was found innocent of 3 out of the 48 counts against him. That proves that those republicans that hate him exaggerated the charges.
There's an abundance of research showing that strong electric and magnetic fields can be hazardous.
Sure, like the electric field formed between clouds and the Earth, but only if you happen to be around when the field discharges.
Only crack the nuts that crack. You don't put the ones that don't crack in the sack.
He knew Sandusky did more good than bad.
What's a few stretched-out assholes compared to more than 100,000 children helped?
Clemson played Sandusky in 1988 in the Citrus Bowl, so they are part of the Penn State culture of anal rape.
U mean Second Mile. They may have raped a lot of little boys, but they did help some little boys.
After forty years of raping in Pennsylvania, we eventually reported him. We did our part.
After forty years of raping in Pennsylvania, we eventually reported him. We did our part.
But only after 40 years!
Interesting. Our dumbass crapflooder wants to make Penn State look bad. We can probably conclude that he's associated with one of their B1G rivals like Ohio State, Michigan, or Michigan State. It wouldn't surprise me if we have a dumbfuck who abuses computers in his university's computer lab to circumvent Slashdot's posting limits. You're, of course, the same shitbag who constantly posts the "Republicans hate us and want us to die" crapfloods. Slashdot would be much better off if the editors would throw some of their unlimited mod points at your bullshit so you get a nice temporary IP ban. Also, the B1G is a horribly overrated and inferior conference. Academically it's way overrated and has been watered down by the addition of schools like Nebraska. In football, B1G teams routinely get dominated by stronger and faster teams from the SEC.
...penises in the asshole of ten year-olds. It only means we decided to not put a stop to it.
No. Deciding to not stop it means you supported it.
Puntrooskie!
This. More good than harm.
As long as there is a properly installed quench tube to vent the boiling Helium and prevent it from filling the room, I don't see how a quench can kill or injure someone.
What would make sense is that someone went near the scanner with something magnetic, injuring/killing themselves or someone else, and resulting in an emergency shutdown of the field (i.e. a quench).
Alkaline batteries are dangerous too, if I eat them.
Only crack the nuts that crack. You don't put the ones that don't crack in the sack.
Always has been. Always will be.
More good than bad. More good than bad.
It takes time to build a case against such a powerful man.
Your kind defends men who anally rape little boys. That is how you be.
This. He did more good than harm.
Most of us didn't rape. We only protected the child rapists.
Good point.
A lot of people here in State College, PA made the decision to protect child rapists. You're painting with a broad brush.
This. He is still a hero here in State College, PA.
You argued for putting the statue of the protector of the child rapist back up. That's pretty damning. Most people are disgusted by people that support protectors of child rapists.
Why would Paterno protect a child rapist unless he was one himself?
This is really just one crapflooder who has found a way to abuse Slashdot's posting limits and flood it with offtopic crap. If you're a moderator, please mod this shit down so the crapflooder gets a temporary IP ban and goes away for the night.
Whiplash, this has been brought to your attention many times. While I don't agree with censoring posts like this through the lameness filter, they are offtopic and disruptive. You have unlimited mod points because you're an editor. Why not hit all of this imbecile's posts with offtopic mods to put him at -1 and give him temporary IP bans?
They're putting a lot of high-tech into doing wireless charging when all they really need is some well designed connectors, industrial actuators and a cheap computer vision system to plugin and charge a parked car.
If you're really intent on having no electrical contact, then magnetically couple with a split-core transformer that's divided between car and charger. It's low tech and gets you in the same efficiency ballpark (or better) relatively easily and with a lot less potential for EMI.
Why is gov doing corporate R&D?????????? Why are tax dollar being spent to improve the profit margins of a select group of companies???
That's the only explanation that makes sense.
Wrong. Lincoln decided to not end slavery, but that doesn't mean he wasn't against it.
Some? No, they helped more than 100,000 little boys while only raping about four dozen of them.
And we're putting Paterno's statue back up. The people around here just don't care about children that were raped.
Not MRIs. When I did a paediatric anaesthesia fellowship we would routinely sit in the room for the scan. Think cardiac MRIs requiring breath holds. The techs sit outside the room cause they need to use computers to run the scanner and also it's really (unpleasantly Even with quality ear protection) noisy. Plus something about pressure in the room that I never understood.
This. Sandusky was on campus from 1963, and it took quite a while to build-up a case against him.
This, plus punishing the guy that created "Linebacker U" would have hurt the university.
...government charges YOU!!!
20kw is nowhere near three times the efficiency of an average charger.
Home chargers for Tesla offer 20kw (22kw in EU) for usual setup.
Superchargers offer a lot more - 135kw for Tesla superchargers, 50kw for regular EU charging stations.
Tesla Model S was the best selling EV in the US last year (yes, it outsold the next best - the Leaf, in number of units, not just sales $) - source http://insideevs.com/monthly-p....
Typical home charger for a Tesla is the mobile connector which delivers 10KW charging from a dryer outlet. Owners have an option to install a 20KW Tesla plug-in charger in their garages, which many people do. Tesla plug-in "superchargers" charge up to 120KW, so 20KW wireless is not 3 times the rate of any of those plug-in chargers (it's actually only 1/6th of the most powerful one). It probably is 3x the rate of the original, discontinued a couple of years ago, RAV4 EV charger, but saying it's 3x the rate of plug-in chargers used today is incorrect. Lastly, there are public chargers limited to ~6.6KW, but their limit is not because of the fact that they are wired, it's mostly their power source (the J1772 connector used by most of those can handle up to 20KW).
If you think there are no health effects from high energy electro-magnetic fields, you will learn at your own expense. Even motorized toothbrushes have been inducing headaches via their inductive chanrging coils when used by kids and sensitive adults. The power supply and high-frequency inverter of military night-vision goggles needs to be placed at the back of the head for counter-balance purposes and the EM gives many a "vomit grade" migraine. To be a spec-ops soldier or helicopter pilot requires immunity to this and only a few supermen's nervous systems are fit enough to wear and use these FLIR sights for prolonged periods.
Said devices use a fraction of a Watt or just a few Watts of electricity when running. A battery-electric car would need to receive 50-150 shp worth of charging power over the induction link. As the Tesla Model 42 zooms by, people on the sidewalks would be "rolling on the floor" in head-splitting pain, while those with pacemakers just die.
Electric railways are 115 years old and they have never been induction-fed. Induction motors yes, squirrel caged, fully enclosed, but not over-the-air power supply. Their electricity comes from physical contact between the pantograph's current collector strips and the copper catenary wire (or third rail contact shoes in arch-conservative nations like England). Even though catenary system is complicated and has wave-dynamic control problems on high-speed railways, they cannot be avoided.
Of course it's faster, because with inductive charging systems you can build it in such a way that it can use a 13.2kV primary coil without putting anyone at immediate risk of electrocution.
The limiting factor in plug-in systems is the 240V supply rail, which is limited to a 30A circuit breaker (240V * 30A = 7200W). If you pipe in a higher voltage primary to a plug-and-socket, then you introduce issues of arc flashing and electrocution. However, if the primary high voltage coil is safely isolated and couples magnetically to a secondary, high current coil, then you can transfer much more energy.
So, let's say we use 7200V (typical underground MV circuit for neighborhood distribution) for the primary instead of 240V, and say 360V for the secondary (20:1 turns ratio). If our 7200V circuit is on a 10A breaker, then we have 72kW available. The primary coil is safely isolated in a panel on the floor under the car, and the secondary coil is inside the car itself. Piece of cake.
This is far from revolutionary. It's simple electromagnetics.
Often I want something and when I get it, I realize I didn't really want it after all. I think wireless charging falls into that category.
The reality is that electric vehicle owners equip the place they park their car overnight with a high capacity electrical circuit. It takes less than 30 seconds to plug in the car after you park.
Doubtless a wireless charging solution could be made safe and effective, but it would cost more. We don't need to find ways to make electric vehicles more costly.
Greed is the root of all evil.
Or maybe they are a human being who simply doesn't understand why people fall over themselves to defend child rapists simply because they like the team they are associated with. Of course it's easier for you to dismiss this criticism as some sort of jealousy, as we just witnessed. Thinking is hard, especially when you have to think how to defend child rapists because of some tenuous connection to some sporting team. Yay you.
You're confusing an MRI (Which uses magnetic fields and non-ionizing radio waves) with a CT scan, which uses ionizing x-rays. Lead shielding is used for devices that emit x-rays.
When taking long trips, we typically stop at places for bathroom/coffee breaks whose main income comes from selling gas. What will happen to these places if cars charge off the road as they drive?
If they design an RV that charges as it drives down the road, and has autonomous driving, I would be tempted to sell my house and live in the RV while driving the local interstates. The RV could drop me off at work in the mornings, then take the kids to school. It could drive to the next state and back waiting until it is time to pick us up. I could tell it to find a traffic jam so that I could fix dinner while the RV is not moving, then its down the road until time to return the next day.
It would not need to be "magnetic" ( assuming you mean ferrous ), only conducting.
An aluminum bolt/rod/whatever in your person would still conduct, and moving thru a magnetic field, would have current induced in it.
That current, having nothing to do, would likely heat the component in question.
emt 377 emt 4
Wow, just wow. I can see it now. people get home, charge, and pop goes your power grid.
I imagine that the big ol' tariff book the US has is about to have a few more pages added....
This is awesome news, but there is a threat here:
I'm fairly certain, that future technology will not allow anonymous charging. It could, but it will not — for the same gratuitous reasons you can't use and recharge a toll-paying transponder anonymously (the way you could use a phone-calling card, for example), but must associate it with both yourself and your car. (Well, New Hampshire, sort of, makes it possible to avoid providing your name, but the cars must still be listed in advance.)
And it is increasingly impossible to drive in certain places without such a transponder, which is, of course, routinely used for surveillance.
As happened with electronic toll-paying, the on-the-road charging too will go from optional to mandatory. Manufacturers will reduce the battery-sizes in many models to save weight and space — and how much of a charge do you need to get from the powered highway to your home (over unpowered streets), right? Effective tracking of your car will become possible. Worse, it may also become possible to remotely disable your car by revoking your access to these chargers.
Today's concerns over license-plate readers may then appear naively quaint...
In Soviet Washington the swamp drains you.
Who said a MRI is dangerous? Thousands of people have them every day with no increase in cancer risk.
I don't know about cancer but MRIs are not harmless. People have been killed/injured by magnetic quench and RF heating of undetected foreign material.
When and where?
Wanna buy a shirt?
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It would save having to put in seat warmers for the winter.
There's an abundance of research showing that strong electric and magnetic fields can be hazardous.
No there isn't.
OSHA Links to Dangers of RF radiation
High powered consumer microwave ovens output about 1kW the charging device uses 20kW. There is serious risk of getting an RF burn from this thing.
Knowledge = Power
P= W/t
t=Money
Money = Work/Knowledge so the less you know the more you make
It only appears faster because it's stealing my SUPERIOR FREE MARKET GENERATED electricity at gunpoint.
--
roman_mir
Then why do radiologists always stand behind lead-lined walls/glass when they operate the machines?
Radiologist doing MRI do not stand behind lead lined glass. The reason they stand outside of the imaging room is to keep sensitive equipment (computers) out of the magnetic field and prevent random pieces of metal in their pockets from accelerating towards the patient. You must be mixing MRI (magnetic resonance imaging, which uses nuclear magnetic resonance) with CT (computer tomography, which uses relatively high intensity X-ray).
Cardiac MRIs require the patient to hold his/her breath. I've had one.
"No there isn't."
Yes, there is. This is why hospitals demand you remove all metal objects ND INFORM THEM OF ANY INSIDE YOU before you go into an MRI/CT scanning machine.
I've had a steel under-skin stud piercing ripped out of my body from an MRI, which also damaged the machine. Try again when you've actually experienced this shit first-hand.
Still waiting on Serviscope_minor to wake up to fucking reality and realize that Jessica Price isn't going to fuck him.
When I had my last MRI, the tech was in the control room, which was right next to the room I am in. There was nothing special about the wall or glass between us. You're confusing MRI with CAT, which uses x-rays..
The metal problem with MRI is that MRI uses extremely strong magnetic fields, which will rip metal loose from your body. That does not mean that the magnetic field is dangerous to normal tissue, just that you had metal in your body and were stupid enough to not say anything.
I should have said ferromagnetic. Anyway, the point is, the quench itself likely didn't cause the injury, but was initiated as a result of it.
Only crack the nuts that crack. You don't put the ones that don't crack in the sack.
You're a fucking idiot. You display a level of stupidity than can only be associated with an education from a Big Ten school. We're talking about a conference that's had 25 years to learn how to count beyond ten and has completely failed. Adding Penn State, Nebraska, Rutgers, and Maryland brings the total to 14 schools. However, it apparently requires someone like me with an SEC education to count to 14.
If you were capable of reading comprehension, you'd understand that I'm not defending Penn State. I'm actually ridiculing Penn State and the rest of the Big Ten Conference. Most of the posts in this thread were made by a single crapflooder seeking to cause disruption by making a large quantity of offtopic posts. The crapflooder has no intent to remind people of the statutory rapes committed by Jerry Sandusky or how high-ranking officials at Penn State conspired to cover up the child abuse. Even if the crapflooder actually did intend to do so, it would be completely offtopic in a story about wireless charging of electric cars. With that in mind, I repeat, you're a fucking idiot. Nobody needs a thread of 40+ offtopic posts in any story.
Also, Penn State's scandal doesn't reflect on the entirety of the University. The students and faculty weren't responsible. You have a former assistant, Mike McQueary, and a former head coach, Joe Paterno, who failed to take appropriate action. You have a former University President, Graham Spanier, and a few other high ranking officials, who completely neglected their responsibilities to report Sandusky's sexual abuse of children when they became aware of it. Email records show that Paterno helped talk them out of bringing the matter to the attention of law enforcement. That's a problem that's all too common at many universities, where athletics has a disproportionate amount of power at the university and brings in an excessive amount of donations. In most states, the highest paid state employee is either a football or a basketball coach. That doesn't reflect on the students and the faculty, though. It reflects on the administration and donors who have misguided priorities favoring athletics over academics. However, the primary mission of a university is academic, and the students and faculty were not complicit in the coverup of Sandusky's abuse.
Paterno's legacy is that he won a hell of a lot of games and former players generally speak highly of him. However, he failed to do the right thing when it mattered most, and chose to protect Sandusky instead of the children whom Sandusky abused. That is Paterno's legacy, and the statue is a reminder of both the good and the bad.
Despite my disdain for the B1G, I'll readily admit that Penn State is a damn fine school. I know plenty of Penn State grads who don't want the Sandusky scandal to define how people view their alma mater. It has no bearing on the quality of education they received or their ethics.
As for the comment about defending child rapists, there's no reasonable way to draw that conclusion from the prior comment. You're a fucking asshole for implying that. You can fuck right off. Go directly to hell. Do not pass go. Do not collect $200. Asshole. There is no defending Sandusky or the Penn State officials who chose to protect him. Crapflooding about Sandusky's sexual abuse of children is awful. You're the scum of the Earth for doing so. Burn in hell, fucker.
I'm avoiding electric cars ... but not because they charge slow.
I'm avoiding them because of cost and distance limits.
Another non-problem solved by tax funded research.
They should have made you pay for the damage. Did you think being under your skin made it different somehow? I know they told you to remove all metal.
John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
And yet none have been able to identify the powered devices in double blind studies.
John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
Many types of stainless steel are non-magnetic.
Still waiting on Serviscope_minor to wake up to fucking reality and realize that Jessica Price isn't going to fuck him.
If you're in the way of microwaves that are too powerful, you'll cook. If you're in a magnetic field that's too powerful, metallic things can be ripped from your body or thrown into you. Those things are pretty obvious, and not what people are talking about when they say those things are safe.
"When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes