Carregamento por indução bem encaminhado

[ruimegas]

Carregamento por indução bem encaminhado. (Look Ma! No Wires! Google Gets Wireless Electric Car Charger)


"Let’s face it: going wireless is cool. The humble phone lost its stuffy image when it lost that annoying cable, wireless computing has transformed access to the Internet and unlocking your car with keyless entry beats stumbling around in the dark for the key hole any day.
So when software and Internet search king Google was approached by a company offering to unplug its electric car fleet from their charging stations it had to say yes.
Installed as part of a test project at Google’s Mountain-view headquarters, the inductive charging system developed by Evatran promises to allow electric cars to charge while they are parked in specially adapted parking bays.
Charging is initiated automatically and unlike the existing cabled solutions, requires no further input from the driver after parking the car.
Although Google’s own electric car fleet includes a wide range of electric and plug in hybrid vehicles the Evatran system will initially be used with its fleet of low-speed electric vehicles used for short-range travel around its campus.


Eventually it is hoped the system could be used in some of Google’s larger plug in vehicles, such as the Plug-in Prius fleet Google invested in as part of its RechargeIt program.
When we first heard about Evatran’s Plugless Power system last year we were a little skeptical: in the past wireless charging under a vehicle came with major energy losses. But in the intervening time we’ve seen time and time again that the technology is rapidly becoming a holy grail of electric car charging.
And it appears just like wireless Internet and cellphones, every generation of wireless induction technology is improving on the generation before it.
So much so that Rolls-Royce’s first all electric car, the ultra-luxurious 102 EX Phantom Experimental Electric will include wireless inductive under car charging as standard.
Will we see Evatran charging pads around parking lots and maybe at stoplights in years to come? At the moment it’s hard to tell. But with Google’s involvement we think it will only be a matter of time before we see wireless inductive charging creep into the public garages and parking lots of Silicon Valley. "

Em: http://www.allcarselectric.com/blog/105 ... lectric%29

[RJSC]

É bom continuarmos a preferir o carregamento por cabo, por algumas boas razões:
- Eficiência, com esse sistema 20% da energia perde-se. Esperam subir para 90% mas nunca será como um cabo, com 99.999%.
- Custo, um cabo é mais barato.
- Vai ter que se começar a estacionar com muita precisão alinhando a bobina do receptor do carro com a da base para conseguir o menos perdas possível.

Isto é um bom sistema para coisas como telemóveis em que se se perder 20% da energia nem se nota porque o seu consumo é pequeno, mas num VE, vai fazer diferença na fatura de energia.

[Filipe]

O pior é o COBRE dos cabos estar a ser pago nos ferro-velhos a 5 EUROS o kilo.

[ruimegas]

"Google es una de las primeras compañías en el mundo en adoptar un sistema de recarga de baterías para vehículos eléctricos sin cable. El sistema se basa en la técnica de inducción electromagnética, una tecnología que ya es utilizada en campos como la telefonía y otros gadgtes electrónicos.

La definición de la inducción electromagnética indica que es “el fenómeno que origina la producción de una fuerza electromotriz (f.e.m. o voltaje) en un medio o cuerpo expuesto a un campo magnético variable, o bien en un medio móvil respecto a un campo magnético estático. Es así que, cuando dicho cuerpo es un conductor, se produce una corriente inducida…” (definición: Wikipedia.es)


Para que el proceso de inducción entre en funcionamiento el vehículo debe estar equipado de un transformador especial para realizar la transferencia de energía.

Google posee en su sede central de Montain View, California, una pequeña flota de vehículos eléctricos destinada a sus empleados para trayectos reducidos pero no todos han sido transformados para acceder a este tipo de recarga ya que la instalación se encuentra en su fase inicial.


La empresa distribuidora de este concepto “Plugless Power” asegura que la eficiencia de carga alcanza hasta un 90% del total suministrado ya que uno de los grandes problemas de la carga por inducción electromagnética es la pérdida de energía durante el proceso.

Según la compañía Evatran, responsable de la instalación "plugless Power", éste sería su primer producto "comercializable".

Em: http://www.forococheselectricos.com/201 ... to-de.html

[ruimegas]

"Google has become the first trial customer for a new wireless EV charging station.

The charging station, installed at Google’s Mountain View headquarters, was developed by Virginia-based Plugless Power. It replaces an electrical outlet with a charging pad that a specially equipped demonstrator vehicle can simply park over to charge up.

Instead of a direct connection with a cord and an outlet, the system uses a principle known as inductive charging where an electrical transformer is “split” between the vehicle and charger. When the two come together, current flows and charges the EV’s battery.

Inductive charging, also known as proximity charging, has been around for more than 100 years and is already in widespread use charging phones and electric toothbrushes. Plugless Power unveiled the first prototype wireless charging station in 2009; the station at Google is the first public release of the technology.

While it’s true the oft-lamented EV1 had a similar system, with an inductive charging paddle that fit into a “plug” on the vehicle, this system is still an improvement, as it allows vehicles to simply drive up to a charging station without any direct contact. As part of the trial, Google and Plugless Power outfitted one of the cars in Google’s EV fleet to work with the wireless setup.

Ditching the cord certainly makes charging easier, and at least one entrepreneur thinks it could keep EVs charging while driving. Halo IPT, a New Zealand startup, is pursuing exactly that with tech that could charge vehicles while they are in motion.

There’s no word from Plugless as to how much their system costs or when it will be more widely available, but the company says to expect more installations throughout 2011.

Photo: Plugless Power. A demonstration of the technology at a trade show in London.

Post updated 3/22/11 at 5:18 PM to include a new photo and reflect that Google’s use of the technology is on a trial basis."

Em: http://www.wired.com/autopia/2011/03/go ... g-station/