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Is Wireless EV Charging the Better Way?

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naperlou
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good alternative
naperlou   10/25/2013 11:11:43 AM
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Cap'n, this is a good alternative.  It is espeically nice because the driver does not have to do anything.  I wonder, though, about billing.  For the school, it is only their vehicles.  I assume that the reciver units could have an ID and the charging units could communicate that back when a vehcile comes up to them. 

The more conventional charging units do have a high voltage option, if the vehicle supports it, to charge the vehicle in a short period of time (I think it is 15 min.).  I don't know how many of these are deployed or how many vehicles can support them, though. This inductive system would be great if the devices were widely installed.  Perhaps they could even be installed at stop lights, etc. 

Ann R. Thryft
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Re: good alternative
Ann R. Thryft   10/25/2013 12:58:18 PM
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Meanwhile, eight states including NY and CA are working together to boost the number of charging stations:
http://www.nytimes.com/2013/10/25/business/energy-environment/coalition-of-states-seeks-to-spur-use-of-electric-cars.html?_r=0

NadineJ
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Re: good alternative
NadineJ   10/25/2013 2:02:47 PM
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I think this would be good if the bus is charged while parked in a staging area.  It wouldn't be a good idea to charge while there are people, especially children, on the bus.  EHS (Electrical Hypersensitivity), like extreme food allergies, is very real for many people.

Here in San Francisco, I noticed that our public buses are moving from bio-diesel to bio-diesel hybrid electric.  This would be great in the bus barns to quickly and easily recharge the fleet.

TJ McDermott
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Coils of copper - tempting?
TJ McDermott   10/25/2013 3:10:13 PM
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I really want this system to be successful - I like the concept very much.  But what temptation will the chargers be to copper thieves?  I've had customers suffer theft of copper cable (sometimes from live circuits!).  How easy will it for thieves to steal the inductor coils?

Charles Murray
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Re: good alternative
Charles Murray   10/25/2013 5:50:15 PM
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You're right, naperlou, public fast-charge stations are starting to pop up. They use 440V lines (only available in public stations) to charge EV batteries in as little as 20 minutes. These systems will connect to the grid on a 220V line and get the job done faster than a wired 220V line, but not as fast as a fast-charge station. 

Charles Murray
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Re: Coils of copper - tempting?
Charles Murray   10/25/2013 5:52:41 PM
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Good point, TJ. We actually discussed that question with HEVA. HEVA's position is that it will be less of a temptation than the copper wiring in a "wired" station, which is a little easier to access.

shehan
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Gold
Re: good alternative
shehan   10/25/2013 11:47:08 PM
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@Charles   - Wow it's a great way of thinking, now you could charge your electric vehicle in the same mechanism. I hope going forward we will have these charging stations at every car park, so you never run out of power.

shehan
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Re: good alternative
shehan   10/25/2013 11:49:44 PM
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@naperlou   - As this is wireless charging we need to figure out wireless vehicle identification for billing. May be we could use an NFC tag for the vehicle to communicate the identification and the time to the charging terminal. 

shehan
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Re: good alternative
shehan   10/25/2013 11:53:14 PM
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@naperlou   - I've heard that there high voltage charging units reduce the life of the batteries. Most manufactures rate the stranded charging power. Vehicle manufactures need to stick to a standard charging voltage to make this project successful. 

shehan
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Gold
Re: good alternative
shehan   10/25/2013 11:55:20 PM
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@Ann – That's good news, I just wish if these charges were wireless too. I wonder why we don't use this concept and implement it at once than having the normal charging units installed first and then upgrading to wireless charging. 

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