Inventor Says New Wireless E.V. Charger Is Safer and Cheaper - latest electric toothbrush

One of the least
Battery is the favorite feature of electric vehicles
Charging wire: no one likes to remember to plug in the car every night.
I groped old with the power cord every time.
Marketing experts in the automotive industry generally believe that wireless battery charging may be the key to parking a large number of electric cars for Americans.
In response, including Delphi, Infiniti/Nissan, Qualcomm, plupower, Rolls-
Royce and WiTricity have developed or tested wireless technology that only requires drivers of electric vehicles to park and charge above the floor of the garage or the mat of the parking space.
These systems depend on a method called induction. Using radio-
Wave sensing, the change current in the wire transmitter coil in the channel bed produces the same change current in the receiver coil located directly above the vehicle.
Think about electric toothbrushes.
Or transformer.
The transmitted power then enters the battery and charges it.
Some of the proposals talk about the Chargers buried on the road, which brings a comprehensive vision
No slot size car.
But none of us think it is absolutely ideal, because unless the design is correct, it can release stray radio waves or heat metal objects nearby, these two problems may raise concerns about security.
But the industry insists on wireless power-
The transfer of technology is completely safe.
Our technology is completely secure, says David Schatz, vice president of sales and business development at WiTricity, a leading electronics manufacturer.
Car charging equipment in Volkswagen Watertown.
Two years ago, we crossed this threshold to prove this, to the satisfaction of the automakers, who have to deal with any potential issue of legal liability in advance.
Code and standards are now being written, he said.
Meanwhile, researchers at Columbia University in Vancouver have developed an alternative method for wireless charging electric cars and trucks.
They have been showing it for a year and say it's a safe, reliable, and seemingly cheap way.
It uses what the inventor Lorne Whitehead calls a Remote Magnetic gear.
This concept stems from his interest in charging implanted medical devices such as cardiac pacemakers.
It depends on the magnetic motor.
Dynamic coupling is a magnetic field interaction between two rotating permanent magnets, which are separated by air from 4 to 6 inch.
The device is based on the transmitter magnet below the car and the receiver magnet in the car for magnetic gears.
When a small motor turns the magnet, the magnetic field causes the upper magnet to turn, just as the compass follows the changing magnetic field, he said.
Then, the upper magnet rotates a small generator located at the top of the car's battery.
The magnetic field between them is essentially a mechanical coupling, an invisible magnetic pulley/belt system, but it does not require direct contact, almost completely energy-efficient, applied physicist, Whitehead said.
In actual production, the two magnets can be integrated into the motor and generator respectively, resulting in more compact powerTransfer System
He said the tests show that the university's system is more efficient than 90% compared to cable charging and does not require a perfect alignment of the car with the equipment.
Magnetic gear technology can easily be built into the low roadside where the car is locatedborne magnet (
It's under the hood.
I will hang up, he said.
A demo system "four Chargers" has been running on campus for about a year and they are charging wirelessly on campus
Service vehicle with receiver magnet installed.
One of the main challenges for electric vehicles is the need to connect wires and sockets in crowded environments and in bad weather, said David Woodson, general manager of the university's construction operations.
The driver's feedback has been very positive since we started testing the system, all they have to do is park and the charge starts automatically.
A patent is under way, sir.
Whitehead believes that the concept will go through a rotation --off company.
'We are also looking at other smaller niche markets like electric forklifts, 'he said.
Other experts in wireless e-commerceV.
Charging technology companies say they doubt the final market feasibility of the university's technology.
"There seems to be too many moving parts," said John M . "
Miller is the center director of the electric power electronics and motor research group at Oak Ridge National Laboratory, Tennessee.
Sir, efficiency comes down to the amount of energy conversion involvedMiller said.
In this case, the energy goes from electrical to mechanical through the magnetic field, back to mechanical and back to electrical.
Each step is accompanied by a certain loss of energy efficiency, which is an inevitable accumulation. Mr.
Neither does Schatz.
Leading car manufacturers are designing wireless electronics. V.
He said that about 2015 of the technology that will be produced and introduced by 2017, he noted that the biggest interest now is to put them in so-
It is called a rain-free hybrid car.
The industry expects future equipment to be close to the size and shape of the paper to accommodate tight packaging inside these products
Model generation.
The power of wisdom --
The transfer of technology is a technology developed on the basis of the technology developed by M. I. T.
, No moving parts.
It is based on the highly resonant magnetic coupling between the specially designed transmitter and receiver.
Each tightly tuned unit is an array of inductance and capacitors made of copper and magnetic materials.
To watch a video demonstration of the university's wireless charging technology, click here.
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