Robert Bruninga via EV wrote:
Looks like EVs and hybrids get an exemption from RF emission limist of the
FCC’s part-15 limits.
Looks like one could bulid a 1 MHz transmitter right in the middle of the
AM broadcast band and run it at 50,000 watts from an EV battery and not
violate part-15 limits! (exemption #1 and #8 and #10!)
An EV can easily have a 50,000 watt controller. They generally switch at
15 KHz or so; not 1 MHz. But the harmonics can easily extend up into the
broadcast band. If the wiring is done badly enough, it can produce a
substantial amount of power in the AM broadcast band.
The "saving grace" is that a car is too small to have a decent antenna
at these frequencies. The wavelength at 1 MHz is 300 meters. This
severely limits the range of the noise that an EV could radiate.
--
Obsolete (Ob-so-LETE). Adjective. 1. Something that is simple,
reliable, straightforward, readily available, easy to use, and
affordable. 2. Not what the salesman wants you to buy.
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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