[RFI] Wireless Power Transfer with electric vehicles

[Hare, Ed, W1RFI]

The figure of 50% does not agree with what I have seen reported. If it were only 50%, the radiated field on the fundamental would be way over any limits and/or 10 kW of heat would be dissipated locally from a 20 kW charger.  The little Qi chargers are not very efficient, but the WPT-EV systems must be efficient or they'd get very, very hot.

https://chrismi.sdsu.edu/publications/090.pdf


-----Original Message-----
From: RFI <rfi-bounces+w1rfi=arrl.org at contesting.com> On Behalf Of Rob Atkinson
Sent: Sunday, April 11, 2021 6:48 PM
To: rfi <rfi at contesting.com>
Subject: Re: [RFI] Wireless Power Transfer with electric vehicles

The people who buy electric cars to Save The World are blissfully ignorant of all the pollution associated with making and recycling batteries.  They will also be blissfully ignorant of the fact that wireless charging energy transfer is about 50% efficient compared to a direct cable connection.  Some won't care--they only want to virtue signal with their cars and have plenty of money to waste.  But maybe enough will avoid this idiocy IF they find out how expensive it will be.

73

Rob
K5UJ
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