Wow, a lot of good information and help. Makes me think I might be able to
solve the problem. I replied to all and it looks like this is going to the
Discussion List.
I'll need to read over the information and let everyone know. I just went over
to the tower location this morning and left my cell phone at home. Same result
but at least we may have eliminated that potential issue.
Sorry I did not say where I was located. I live in Fairfield CA between San
Francisco and Sacramento. If anyone lives in the area I would be more than
happy to have them come over, if nothing else but to make sure I am not crazy
about this issue.
I have been thinking it has something to do with the throttle also so these
comments really help. The throttle is I think a five or six wire Prius
throttle with two wipers, two grounds and one or two 5 volt wires if I remember
correctly. From the pedal the wires are covered with a shielding material out
to a point about 2 feet of the controller where I had to add additional wiring
to make it long enough to fit. At one point I wrapped the exposed wires with
tin foil and grounded the foil. I also have installed a lot of ferrite beads
close to the controller and the UQM inverter as someone had suggested a couple
of months ago. I could possibility re-route the wiring from the peddle and do
some of the other things recommended here. I'll try anything at this point.
Interesting comment about the AM radio because when I was driving it in the
downtown area I had it almost quit again in one specific area and since that
time I have noticed that the radio on our 2007 Saturn Vue has issues in the
same area and I think it is tuned to an AM station. I don't have a radio in
the Avanti.
I will read over all the suggestions and start trying some things. Thanks so
very much to those who have commented. If you all have any questions please
let me know. David
On Saturday, June 24, 2023 at 10:13:59 AM PDT, Lee Hart via EV
<ev@lists.evdl.org> wrote:
Bill Dube via EV wrote:
> I agree with Phil.
>
> I also doubt that cell towers are the root cause of your issue.
I agree; cell phones operate at GHz frequencies, which is highly
unlikely to affect any EV electronics.
However, wherever they put cell towers, they may also put *other* radio
services. There's a city water tower near us, and it literally bristles
with dozens of radio antennas; police, fire, FM radio stations, etc.
They operate at lower frequencies and higher power levels, which *may*
get into your EV wiring.
> The problem is likely due to the motor wiring and other power wiring not
> kept separate/distant from the throttle wiring. The throttle wiring
> needs to be a small, shielded, 3-wire cable, kept very distant from any
> battery or motor cables.
>
> Additionally, the motor cables need to be kept very close to one
> another, and the battery cables need to travel in pairs that are also
> kept close to one another. Every battery cable that emerges from a
> battery module needs to be paired tightly with the opposite polarity
> battery cable carrying the return current.
That's all good advice. When this can't be done (for instance the wiring
between cells inside a battery box), then the box itself should be
metal, or have some kind of shielding (even grounded aluminum foil will
work).
A portable AM radio is an easy way to "sniff" for RF noise. Tune the
radio between stations, and turn up the volume. If something is emitting
broadband RF noise, it's likely to interfere with AM radio.
Lee
--
Whatever the problem, be part of the solution. Don’t just sit
around raising questions and pointing out obstacles. -- Tina Fey
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
--
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