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Discussion Starter · #2 ·
Yes, this is cool! I particularly like the idea of charging enroute.
Imagine a relatively small pack that's good for short trips and all the
major long distance routes had embedded induction charging. (Oof, what a
lot of infrastructure.) You could go pretty much as far as you wanted
without have to stop to charge! Of course, each vehicle would need some
sort of tamper-proof meter to track energy used from the system and
ultimately handle billing.

One thing I'm curious about, if anyone can answer (i.e. Lee). How much
efficiency is lost when the two coils become separated significantly - as
they would in this case? Is it small, where most of the energy generated is
absorbed in the receiving coil? or does the transmitter act like an antenna
and "broadcast" out to space?

Peri Hartman
=


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of brucedp4
Sent: 22 March, 2011 12:01 PM
To: [email protected]
Subject: [EVDL] Plugless Power Inductive charging making Googly-eyes


Inductive EV charging is baack! Proprietary or can anyone play?

http://www.wired.com/autopia/2011/03/google-installs-a-wireless-ev-charging-
station/
[image] Google Installs Wireless EV Charging Station By Keith Barry Mar 21
2011

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

The charging station, installed at Google=92s Mountain View headquarters, w=
as
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
=93split=94 between the vehicle and charger. When the two come together, cu=
rrent
flows and charges the EV=92s 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=92s true the oft-lamented EV1 had a similar system, with an induct=
ive
charging paddle that fit into a =93plug=94 on the vehicle, this system is s=
till
an improvement, as it allows vehicles to simply drive up to a charging
station without any direct contact. Google and Plugless Power outfitted one
of the cars in Google=92s 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 [
http://www.wired.com/autopia/2010/11/ditch-the-cord-let-the-road-charge-your
-ev/
]

There=92s 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.

This diagram shows how the setup works =97 simply drive your electric vehic=
le
or plug-in hybrid, fitted with an adapter, over the =93parking block=94 and
leave it there. In a nutshell, inductive charging separates two halves of
the electric transformer. One is in the car, the other on the floor. Bring
them together and current from the charging station flows into the adapter
in the car.
[Wired.com =A9 2011 Cond=E9 Nast Digital. All rights reserved.]






{brucedp.150m.com}

--
View this message in context:
http://electric-vehicle-discussion-list.413529.n4.nabble.com/Plugless-Power-
Inductive-charging-making-Googly-eyes-tp3397405p3397405.html
Sent from the Electric Vehicle Discussion List mailing list archive at
Nabble.com.

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev



_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 

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Registered
Joined
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70 Posts
Discussion Starter · #3 ·
Hi Peri,

When the two coils are not tightly coupled then all
energy in the field created by the first coil is lost.
(You are probably only a few miles away from many
Kilowatt or even Megawatt broadcast transmitters.
I dare you to try pick up even a milliwatt of power
from that broadcast)
Of course the coils can be designed in such a way that
when they are not mated, the amount of energy in the
transmitting coil is reduced, either by pulsing it
like it is done in an induction heating plate when
you remove the pan or in other ways to avoid losing =

massive amounts of power, but it still will be a waste...

Nothing is as efficient as a pair of copper contacts.

Cor van de Water
Director HW & Systems Architecture Group
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.com
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 383 7626 VoIP: +31 20 3987567 FWD# 25925
Tel: +91 (040)23117400 x203 XoIP: +31877841130

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behal=
f Of Peri Hartman
Sent: Tuesday, March 22, 2011 12:22 PM
To: 'Electric Vehicle Discussion List'
Subject: Re: [EVDL] Plugless Power Inductive charging making Googly-eyes

Yes, this is cool! I particularly like the idea of charging enroute.
Imagine a relatively small pack that's good for short trips and all the maj=
or long distance routes had embedded induction charging. (Oof, what a lot =
of infrastructure.) You could go pretty much as far as you wanted without =
have to stop to charge! Of course, each vehicle would need some sort of ta=
mper-proof meter to track energy used from the system and ultimately handle=
billing.

One thing I'm curious about, if anyone can answer (i.e. Lee). How much eff=
iciency is lost when the two coils become separated significantly - as they=
would in this case? Is it small, where most of the energy generated is ab=
sorbed in the receiving coil? or does the transmitter act like an antenna =
and "broadcast" out to space?

Peri Hartman
=


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behal=
f Of brucedp4
Sent: 22 March, 2011 12:01 PM
To: [email protected]
Subject: [EVDL] Plugless Power Inductive charging making Googly-eyes


Inductive EV charging is baack! Proprietary or can anyone play?

http://www.wired.com/autopia/2011/03/google-installs-a-wireless-ev-charging-
station/
[image] Google Installs Wireless EV Charging Station By Keith Barry Mar 21
2011

Google has become the first 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 outl=
et with a charging pad that a specially equipped demonstrator vehicle can s=
imply 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 m=
ore than 100 years and is already in widespread use charging phones and ele=
ctric toothbrushes. Plugless Power unveiled the first prototype wireless ch=
arging station in 2009; the station at Google is the first public release o=
f the technology.

While it's true the oft-lamented EV1 had a similar system, with an inductiv=
e charging paddle that fit into a "plug" on the vehicle, this system is sti=
ll an improvement, as it allows vehicles to simply drive up to a charging s=
tation without any direct contact. 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 entrepr=
eneur thinks it could keep EVs charging while driving. Halo IPT, a New Zeal=
and startup, is pursuing exactly that with tech that could charge vehicles =
while they are in motion [ http://www.wired.com/autopia/2010/11/ditch-the-c=
ord-let-the-road-charge-your
-ev/
]

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 installa=
tions throughout 2011.

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

This diagram shows how the setup works - simply drive your electric vehicle=
or plug-in hybrid, fitted with an adapter, over the "parking block" and le=
ave it there. In a nutshell, inductive charging separates two halves of the=
electric transformer. One is in the car, the other on the floor. Bring the=
m together and current from the charging station flows into the adapter in =
the car.
[Wired.com =A9 2011 Cond=E9 Nast Digital. All rights reserved.]






{brucedp.150m.com}

--
View this message in context:
http://electric-vehicle-discussion-list.413529.n4.nabble.com/Plugless-Power-
Inductive-charging-making-Googly-eyes-tp3397405p3397405.html
Sent from the Electric Vehicle Discussion List mailing list archive at Nabb=
le.com.

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev



_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
| REPLYING: address your message to [email protected] only.
| Multiple-address or CCed messages may be rejected.
| UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
| OTHER HELP: http://evdl.org/help/
| OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
 
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