[RFI] Wireless Power Transfer with electric vehicles

[Hare, Ed, W1RFI]

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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