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@contesting.com> On Behalf Of Rob Atkinson
Sent: Sunday, April 11, 2021 6:48 PM
To: rfi <rfi@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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