Hi Dennis, So, I'm getting the tiniest feeling you don't think much of inductive charging (IC)?
Whilst I agree that it's all vapourware at the moment you only have to look at where other commonly recharged things are going to see that if EVs really do take over from ICEVs, IC is an inevitable progression. Sure, they will have to do tests to make sure its safe etc but as far as your specific concerns go... Transfer efficiency has been demonstrated to be as high as 98% - depending primarily on the proximity of the coils. There is no reason why the vehicle's coil couldn't be made to move lower for charging tho I think it unlikely that it would be cost effective. Cars with adaptive suspension would benefit automatically, of course. It would be very easy to switch off the transmitting coil if no vehicle were present to charge - indeed the system would not want to be wasting energy like that anyway. I can't see any significant danger to any sort of structure in close proximity to an erroneously energised transmitting coil. You would have to have at least *some* sort of receiver coil to get any induced current and the likelihood of that happening in a way sufficient to cause a spark that, in turn, ignites some fuel left lying around or leaking is pretty unlikely. As to quick-charging, I think the whole point is that these coils would be inserted on or beneath the road surface at designated parking bays with the specific intention that the EV parked in them would be there for a relatively long time - whilst the driver was at work for example and therefore, a high power 'connection' isn't really what they will be intended for. That said, there is no reason that alternative arrangements, specifically designed for high power charging, couldn't be made. The system can be very efficient indeed with little or no gap. This could be arranged for buses and trucks, for example, (and cars too, really) but would need a more complex arrangement than just putting a fixed pad on the road/floor or burying the coil below the road surface. I agree 100% that before we start spending money on making the EV experience less of a hassle (plugging in every evening is *such* a bore!) that we need first and foremost a well planned, well maintained and prolific rapid (50kW) AC and DC EVSE infrastructure. Without it EVs will never become mass market as the range issue will (rightly or wrongly) always colour the decision making process when it comes to your average driver buying a new (or used, for that matter) car. If anyone is interested, the UK govenmnets stance on all this is available in 2 publications I dug up recently... 2011 'Making the Connection - The Plug-In Vehicle Infrastructure Strategy' - https://www.gov.uk/government/publications/making-the-connection-the-plug-in-vehicle-infrastructure-strategy (either Word or PDF format) ...and the 2013 follow-up document 'Driving the Future Today - A strategy for ultra low emission vehicles in the UK' - https://www.gov.uk/government/publications/driving-the-future-today-a-strategy-for-ultra-low-emission-vehicles-in-the-uk I am trying my best at this time to make the powers-that-be here in the UK realise the importance of a rapid-charge infrastructure and stop wasting money on low power, AC, street-side charge points as well as these crazy, free, home EVSEs the UK government is funding (at a good £1k a pop when a simple (probably pre-existing) 3kW mains socket would do). Unfortuantely, they are under the impression that private industry is going to provide the rapid charging infrastructure though comparing the earlier paper with the later one, I think the truth is beginning to dawn on them. Readers of these documents will note the equally depressing references to support for hydrogen as playing a large part in the move away from fossil-fueled vehicles. Yeah, I know, don't get me started but it does show you how muddle-headed they are - just like the US government! MW On 27 Apr 2014, at 17:06, Dennis Miles wrote: > Again with the wireless charging, show me a product I can buy today and is > more efficient than a simple plug and wire. A lot of talk and pictures of > simulated dream products. The problems with direct wired charging are > slight lack of convenience, but, I don't see any new technology for > refueling with gasoline without stopping. And what is the transfer > efficiency and what health hazards are the possible result of flinging > kilowatts of energy into an area which may or may not be occupied by an EV > and what happens when some misguided driver parks with his ICE fuel tank > directly over a wireless recharging emitter. And a cord can give us Quick > charging , is the wireless Quick charging? Or are we going to invest more > thousands in infrastructure in the name of convenience similar to the B.S. > of the J1772 "Standard" trying to generate profits for infrastructure > manufacturers or sales companies. The only improvements necessary are > lower cost and greater efficiencies, and thus greater range in the > vehicles... > > *Dennis Lee Miles * > > > > > > On Sun, Apr 27, 2014 at 8:16 AM, brucedp5 <bruce...@operamail.com> wrote: > >> >> >> >> http://www.broadwayworld.com/bwwgeeks/article/HELLA-Developing-New-Charging-Systems-For-Electric-Vehicles-2014042299 >> HELLA Developing New Charging Systems For Electric Vehicles >> April 22 2014 HELLA >> >> PLYMOUTH, Mich., April 22, 2014 /PRNewswire/ HELLA is working with Paul >> Vahle GmbH to develop wireless charging systems that could spark renewed >> consumer interest in electric and hybrid-electric vehicles. >> >> Commonly used to recharge small consumer products such as smartphones and >> electric toothbrushes, inductive or wireless charging for cars will make it >> easier for drivers to charge car batteries and extend a vehicle's driving >> range. >> >> Rather than using plug-in charging stations, car owners in the future will >> simply need to park over an inductive charging unit to trigger the process, >> according to Dr. Marc Rosenmayr, CEO for HELLA Electronics in North and >> South America. >> >> He adds that if inductive charging coils were embedded in streets, electric >> vehicles also could be recharged when stopped at traffic lights or even >> while being driven. >> >> For electric car buyers, a contact-free method of transferring energy to >> the >> vehicle certainly will be more convenient and less time consuming. Cables >> no >> longer will be necessary. Inclement weather and the risk of vandalism also >> can be avoided if outside charging stations are involved. >> >> "Wireless, inductive charging is a far more convenient way to recharge a >> vehicle's battery system," Rosenmayr points out. "The driver only needs to >> stop or drive over a charging unit or network to activate the process. As >> wireless charging has become more available and easy to use, it also might >> allow automakers to reduce battery size and weight on electric and hybrid >> electric vehicles. >> >> Rosenmayr notes that a number of technological and infrastructure >> challenges >> still must be overcome before wireless charging for cars and light trucks >> can be successfully introduced. Energy transfer over high-frequency fields >> that are at the heart of inductive systems, for example, cause heat to >> build >> up in metal objects which could lead to safety issues. The impact that >> wireless charging might have on other vehicle electronic systems such as >> navigation, infotainment, driver-assistance and keyless entry systems also >> will need to be studied. >> >> The cooperation between Vahle and HELLA combines the expertise and >> experience of both companies in the field inductive charging. Based in >> Kamen, Germany, Vahle has 15 years of experience in contact-free energy >> transfer in industrial environments, while HELLA is a recognized leader in >> the development of electronics, software, processes and production in the >> auto industry. >> [(c) 2014 Copyright Wisdom Digital Media] >> >> >> >> >> http://evfleetworld.co.uk/news/2014/Apr/Hella-and-Vahle-partner-on-wireless-electric-vehicle-charging/0438014059 >> Hella and Vahle partner on wireless electric vehicle charging >> 22 Apr 2014 - Hella and Vahle will partner to develop wireless charging >> systems for electric and plug-in hybrid vehicles Hella and Vahle will >> partner to develop wireless charging systems for electric and plug-in >> hybrid >> vehicles >> Component manufacturer Hella and contact-free energy transfer specialist >> Paul Vahle GmbH have announced a partnership to develop wireless charging >> systems for plug-in hybrid and electric vehicles. >> [image >> >> http://evfleetworld.co.uk/news/2014/Apr/images/0438014059-9003-77181_jpg-320.jpg >> Hella and Vahle will partner to develop wireless charging systems for >> electric and plug-in hybrid vehicles >> ] ... _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
