Roger Stockton via EV wrote:
Hmm, maybe cost savings of putting a grounded shield around the motor
and controller. For the AM radio, what could the cost be? $1.00?
Good point; perhaps the real cost savings isn't the radio itself, but that its
absence allows them to cut corners (and cost) elsewhere on EMI measures?
That said, my conversion doesn't need shielded conductors or a shield around the controller in order
for AM to be perfectly usable, so I'm not sure where they would cut costs such that they needed to
eliminate AM capability to "hide" their cost saving measures? Commercial EVs pretty much
always have the controller in an aluminum enclosure, so it should be largely shielded for
"free"; I doubt we'll see controllers in plastic boxes very soon ;^>
That's been my experience as well. The AM radio in my LeCar EV
conversion works. It has a classic ADC series motor, Curtis 1231C
controller, and normal non-shielded wiring. There is some noise on weak
AM stations, but they still work.
Now, if the modern factory EVs are using much faster switching edges in
their controllers, there could be a lot more noise.
--
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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