Hmm, that brings up a question.
Do automobiles (electric or otherwise) have to pass any FCC regulations
regarding RF emissions?
Al
On 11/9/2018 8:29 PM, Lee Hart via EV wrote:
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.
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