[RFI] Wireless Power Transfer with electric vehicles

[David Eckhardt]

With FCC having RF exposure "safety" issues with low power wireless
chargers - we have to measure RF field strength as a regulatory issue, now
- I certainly can envision these 20 kW beomyths coming under rather nasty
'safety' regulations!  That, alone, may kill the proposed nightmare -
hope.......hope.....  After all, BPL was conceived with its own casket (and
FCC cheating which ARRL took to court and won).

Dave - WØLEV


On Sun, Apr 11, 2021 at 6:10 PM Tom Thompson <w0ivj at tomthompson.com> wrote:

> I looked at the video and 6:50 into it there is a proposed schematic
> that has a classic switch mode power supply circuit.  At 21 kW, that is
> really going to create a lot of RFI unless they do a great deal of
> filtering.
>
> Tom   W0IVJ
>
> On 4/11/2021 9:58 AM, Michael Aust via RFI wrote:
> > Here a technical discussion on these
> > Wireless RF chargers that will destroy
> > HF for city dwellers for sure !
> >
> > https://m.youtube.com/watch?v=iOVg62_DUYU
> >
> > Mike
> > WB6DJI
> >
> > Sent from my iPhone
> >
> >> On Apr 11, 2021, at 8:52 AM, Michael Aust <wb6dji_dx at icloud.com> wrote:
> >>
> >> These RF chargers like the Qi for iPhones is being proposed as
> Automobile RF Chargers for Hybrid cars now and are basically RF oscillators
> generating Lots of RF in the HF Bands
> >>
> >> 20kW RF oscillators!!!!
> >>
> >> https://m.youtube.com/watch?v=CEGlmQS692w
> >> Qi RF Charger
> >>
> >> This Will destroy the HF HamBands
> >>
> >> Mike
> >> WB6DJI
> >>
> >>
> >> Sent from my iPhone
> >>
> >>>> On Apr 10, 2021, at 4:28 PM, James Gordon Beattie Jr <w2ttt at att.net>
> wrote:
> >>>>
> >>> Ed,
> >>> The bottom line question will be whether in a housing sibdivision with
> homes  with two EV chargers each, can they peacefully coexist with low
> profile HF/VHF/UHF antennas in attics, around gutters and on flag poles?
> >>>
> >>> The pressures of domestic electronics technology and HOAs and
> deed/convenant-restricted communities are at crossed purposes with respect
> to Amateur Radio.
> >>>
> >>> 73,
> >>> Gordon Beattie, W2TTT
> >>> 201.314.6964
> >>>
> >>> Get Outlook for Android<https://aka.ms/ghei36>
> >>>
> >>> ________________________________
> >>> From: RFI <rfi-bounces+w2ttt=att.net at contesting.com> on behalf of
> Hare, Ed, W1RFI <w1rfi at arrl.org>
> >>> Sent: Saturday, April 10, 2021 3:21:20 PM
> >>> To: jim at audiosystemsgroup.com <jim at audiosystemsgroup.com>;
> rfi at contesting.com <rfi at contesting.com>
> >>> Subject: [RFI] Wireless Power Transfer with electric vehicles
> >>>
> >>> Oh, it's worse than the little Qi chargers, Jim.  We are talking 20kW
> chargers for electric vehicles and ARRL and IARU are very concerned about
> harmonics and inverter noise.  Right now, they are using magnetic loops,
> which are resonant, but also need filtering,, which at the 20 kW level Is
> not trivial.  The key is to get the right limits set.  ARRL has been
> helping to revise a few industry position papers, and although we don't
> always see eye to eye, we are making a difference and, more important,
> planning ongoing work.  Much like BPL, the goal is not to stop technology,
> but to help identify proper EMC solutions. With BPL, HomePlug  did it and
> HomePlug devices deployed successfully by the millions.
> >>>
> >>> Today, I am in the Lab, gathering the wiring and adapters I need to
> finish the installation of  1.5m loop and active whip on a trailer to tow
> behind my van, to get away from vehicle noise. I am headed out to two large
> solar farms in Connecticut, just to get a feel for the EMI that may be
> present near them locally.
> >>>
> >>> I get to have all this fun on weekends sometimes, too!
> >>>
> >>> -----Original Message-----
> >>> From: RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> On Behalf Of
> Jim Brown
> >>> Sent: Saturday, April 10, 2021 3:14 PM
> >>> To: rfi at contesting.com
> >>> Subject: Re: [RFI] Ed Hare W1RFI Contact Info?
> >>>
> >>>> On 4/10/2021 11:58 AM, Hare, Ed, W1RFI wrote:
> >>>> I have three major issues come up with wireless power transfer,
> >>> Great to hear that you're engaged on this, Ed. My RFI alarm went off
> years ago when I heard the first rumblings about this for use in charging
> widely used consumer devices.
> >>>
> >>> 73, Jim K9YC
> >>> _______________________________________________
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-- 
*Dave - WØLEV*
*Just Let Darwin Work*