Author Topic: Wireless charging efficiency  (Read 2613 times)

0 Members and 1 Guest are viewing this topic.

Offline hamdi.tnTopic starter

  • Frequent Contributor
  • **
  • Posts: 623
  • Country: tn
Wireless charging efficiency
« on: June 01, 2017, 01:16:18 am »
So i been reading an article (link below, in french) talking about ability of electric cars to be charged while running in highway or something using wireless charging, obviously the road will act as a huge charger (project done by an american company and financed by some European program). To me it sound like a load of crap and a waste of money, but this made me think if there is any serious study about efficiency of wireless charger compared to wired classic charger.

i certainly searched for the subject, Texas Instrument documentations are all over the place and by looking at those i find it a bit biased and written in a way to prove that it's as efficient as standard charger. did anyone here designed some wireless charged products and did some efficiency measurement in the process that can share his experience.

Thanks.


http://www.lepoint.fr/automobile/actualites/les-vehicules-electriques-pourraient-a-terme-se-charger-en-roulant-18-05-2017-2128513_683.php
 

Offline DerekG

  • Frequent Contributor
  • **
  • Posts: 882
  • Country: nf
Re: Wireless charging efficiency
« Reply #1 on: June 01, 2017, 02:08:57 am »
So i been reading an article (link below, in french) talking about ability of electric cars to be charged while running in highway or something using wireless charging, obviously the road will act as a huge charger (project done by an american company and financed by some European program).

Yes, if you take it at face value, the further you drive the more energy will be stored in your batteries. A sort of "perpetual energy".

On a serious note, any magnetic field that is generated "by the car itself" will resist the movement of the vehicle's forward motion as per Newton's Laws of Motion.

If the magnetic field in generated "by the highway" the highway will have to be specially built & have electricity running through it to generate the magnetic field. Presumably the supplier of the electricity will want to be paid for it by those who use it.
I also sat between Elvis & Bigfoot on the UFO.
 

Offline Ampera

  • Super Contributor
  • ***
  • Posts: 2578
  • Country: us
    • Ampera's Forums
Re: Wireless charging efficiency
« Reply #2 on: June 01, 2017, 08:25:54 am »
Hah. I can see that being easy to meter. Unless you have toll roads, good luck getting someone to pay for something they already have, and you can't track.
I forget who I am sometimes, but then I remember that it's probably not worth remembering.
EEVBlog IRC Admin - Join us on irc.austnet.org #eevblog
 

Offline hamdi.tnTopic starter

  • Frequent Contributor
  • **
  • Posts: 623
  • Country: tn
Re: Wireless charging efficiency
« Reply #3 on: June 01, 2017, 10:12:27 pm »
the project itself is a joke and much like solar roadway will never pass prototype for things like cost, unclear business model as you said who will pay for it and how. and what interest me the most how efficient will it be (this article is talking about 20Kw available for the car) ...
this remind me the idea by Top gear Uk host james may several years ago when he said that they should make road generate electricity for the electric car passing by ...  :-DD
 

Offline nctnico

  • Super Contributor
  • ***
  • Posts: 27365
  • Country: nl
    • NCT Developments
Re: Wireless charging efficiency
« Reply #4 on: June 01, 2017, 10:23:22 pm »
i certainly searched for the subject, Texas Instrument documentations are all over the place and by looking at those i find it a bit biased and written in a way to prove that it's as efficient as standard charger. did anyone here designed some wireless charged products and did some efficiency measurement in the process that can share his experience.
The efficiency depends on the size of the coils and the distance. With large coils nearby you can reach high efficiencies but at high power the currents will also be high so there will be substantial copper and switching losses. BTW in a way you can see an induction heater as a wireless energy transfer device as well so the idea isn't as far fetched as you might think. But yes, the 'modern' wireless energy transfer methods for charging aren't really mainstream and people with any real hands on experience are rare even though the basic principles aren't new at all.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline Nusa

  • Super Contributor
  • ***
  • Posts: 2417
  • Country: us
Re: Wireless charging efficiency
« Reply #5 on: June 02, 2017, 01:02:17 am »
So i been reading an article (link below, in french) talking about ability of electric cars to be charged while running in highway or something using wireless charging, obviously the road will act as a huge charger (project done by an american company and financed by some European program). To me it sound like a load of crap and a waste of money, but this made me think if there is any serious study about efficiency of wireless charger compared to wired classic charger.

i certainly searched for the subject, Texas Instrument documentations are all over the place and by looking at those i find it a bit biased and written in a way to prove that it's as efficient as standard charger. did anyone here designed some wireless charged products and did some efficiency measurement in the process that can share his experience.

Thanks.


http://www.lepoint.fr/automobile/actualites/les-vehicules-electriques-pourraient-a-terme-se-charger-en-roulant-18-05-2017-2128513_683.php

The article tells you who is developing the technology. My search for "qualcomm wireless charging" got me to https://www.qualcomm.com/products/halo on the first try. The info you seek is there. You jumped into ridicule mode a bit too soon, methinks.
 

Offline Nusa

  • Super Contributor
  • ***
  • Posts: 2417
  • Country: us
Re: Wireless charging efficiency
« Reply #6 on: June 02, 2017, 01:19:41 am »
Hah. I can see that being easy to meter. Unless you have toll roads, good luck getting someone to pay for something they already have, and you can't track.

Hey, if the road itself is capable of charging at a 20 KW rate, transmitting a bit of data like a license key and account number is a pretty trivial detail. At the very least there are niche markets...for instance a city metro system run with electric buses. And once a charging system is in place, you're positioned to buy electric for other vehicles. Police cruisers are an obvious example of constant use, usually used around the clock by several shifts. The long-haul trucking market might justify this for interstates someday.
 
The following users thanked this post: Someone

Offline hamdi.tnTopic starter

  • Frequent Contributor
  • **
  • Posts: 623
  • Country: tn
Re: Wireless charging efficiency
« Reply #7 on: June 02, 2017, 02:00:14 am »
So i been reading an article (link below, in french) talking about ability of electric cars to be charged while running in highway or something using wireless charging, obviously the road will act as a huge charger (project done by an american company and financed by some European program). To me it sound like a load of crap and a waste of money, but this made me think if there is any serious study about efficiency of wireless charger compared to wired classic charger.

i certainly searched for the subject, Texas Instrument documentations are all over the place and by looking at those i find it a bit biased and written in a way to prove that it's as efficient as standard charger. did anyone here designed some wireless charged products and did some efficiency measurement in the process that can share his experience.

Thanks.


http://www.lepoint.fr/automobile/actualites/les-vehicules-electriques-pourraient-a-terme-se-charger-en-roulant-18-05-2017-2128513_683.php

The article tells you who is developing the technology. My search for "qualcomm wireless charging" got me to https://www.qualcomm.com/products/halo on the first try. The info you seek is there. You jumped into ridicule mode a bit too soon, methinks.


Am not looking for info about this project.
i asked for feedback from ppl who designed products and gadget using wireless charging tech.

beside i saw the company working on the project , i just didn't mention them, basically it change nothing to the fact that this is a waste of money (of some european program / tax payer) a fancy web page will not make it legit.

edit : FABRIC is a €9 million project, mostly funded by the European Commission, addressing the technological feasibility, economic viability, and socio-environmental sustainability of wireless DEVC.  Translation : a 9million € to prove it can be done (we sure it's technologically possible) and it will end there.
« Last Edit: June 02, 2017, 02:07:25 am by hamdi.tn »
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf