Fast switching power doesn't need a ground or a common return to generate
loud EMI and foul AM. In my old testing lab I had used an old transistor
radio to locate noise that was fouling a turbine flowmeter output. The
problem lies with rapid rising and falling voltage - something that is
desired
Mark Abramowitz via EV wrote:
Customer: The “X” feature in my car doesn’t work right.
Dealer: That’s okay. We think that it’s “better” to use something else.
That’s acceptable? Really?
Sure it is! Marketing will convince him. Look, we've been convincing
them to buy our ICEs for years! :-)
"Do you _need_ an AM radio in your car?"
No. But it was sure nice to have when we were heading north out of Weed
CA Route 97 on a dark December night not long ago. The sign said to
tune your radio to some AM frequency for traffic conditions. That saved
us a lot of time because the road was
There is no "ground" in a vehicle, only "chassis". (Unless the vehicle
is on charge and connected to the grid.) The drivetrain and the AM radio
share the chassis "ground", which is likely the root of the problem.
The EMI comes from the controller PWM switching, goes into the chassis,
(and is
Well conducted emissions seems easier to eliminate
Sent from my iPhone
> On Nov 9, 2018, at 12:09 PM, Lee Hart via EV wrote:
>
> paul dove via EV wrote:
>> Is the problem radiated emissions or conducted emissions anyone know?
>
> If radiated, it will cause problems not only for your own
I had interference on the AM radio in my Tesla model S.
Took it in to Tesla to be fixed.
A week later, I got it back. No change in the AM interference.
Their answer, use streaming for AM...
Thank you,
David Delman
___
UNSUBSCRIBE:
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
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)
Peri Hartman 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
t;
Sent: 09-Nov-18 3:20:31 PM
Subject: Re: [EVDL] AM radios dropped from plugins (RFI, EMI, +)> (go
digital)
Tom Keenan wrote:
I have a 2013 Leaf, and the AM radio works fine. Same with my old 2005
Prius. I use the AM radio on a daily basis during my commute to work.
Not sure if it is pe
Tom Keenan wrote:
> I have a 2013 Leaf, and the AM radio works fine. Same with my old 2005
> Prius. I use the AM radio on a daily basis during my commute to work.
> Not sure if it is perhaps an issue with certain radio suppliers/car
> manufacturers?
I suspect it has more to do with the cost
Subject: Re: [EVDL] AM radios dropped from plugins (RFI, EMI, +)> (go
digital)
I have a 2013 Leaf, and the AM radio works fine. Same with my old 2005
Prius. I use the AM radio on a daily basis during my commute to work.
Not sure if it is perhaps an issue with certain radio suppliers/
I have a 2013 Leaf, and the AM radio works fine. Same with my old 2005 Prius.
I use the AM radio on a daily basis during my commute to work. Not sure if it
is perhaps an issue with certain radio suppliers/car manufacturers?
Tom Keenan
> On Nov 9, 2018, at 10:09 AM, Lee Hart via EV wrote:
>
paul dove via EV wrote:
Is the problem radiated emissions or conducted emissions anyone know?
If radiated, it will cause problems not only for your own car; but will
also wipe out AM in the car next to it!
Our Prius has an AM radio, though it has a "tin ear" -- poor weak signal
Is the problem radiated emissions or conducted emissions anyone know?
Sent from my iPhone
> On Nov 8, 2018, at 9:19 PM, brucedp5 via EV wrote:
>
>
>
> https://www.warc.com/newsandopinion/news/video_didnt_kill_the_radio_star_but_electric_cars_might/41298
> Video didn't kill the radio
https://www.warc.com/newsandopinion/news/video_didnt_kill_the_radio_star_but_electric_cars_might/41298
Video didn't kill the radio star… but electric cars might
08 November 2018
Music cartridges didn’t see it off. Neither did cassettes, nor CDs. But AM
radio in cars might just have met its
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