Forum

Unisciti allacomunità
REGISTRAZIONEAccedi

Electromagnetic Field Shielding ?

Hi,

I wanted to ask if anyone had a chance to measure the EMF in the Model S front and back, or if anyone has information about the measures Tesla took to protect the passengers and driver from EMF.

Thanks,

I guess we were about due to go down this alley again

2010: http://teslamotors.com/forum/forums/emf-radiation
2011: http://teslamotors.com/forum/forums/emf-dangers

Not worth worrying about, in my opinion. Everything has some kind of hazards associated with it, including getting out of bed. The biggest hazard you will face driving your Model S is the same one you face driving any other car - other drivers.

Embrace the fact that you're going to die some day and enjoy life while it lasts.

Your headset/earbuds and connector wire produce vastly more EMF exposure.

This is not correct about the earbuds or headsets and one major difference is that I use my headset for 10 minutes a day and drive me car for hours a day.
The size of the electric motor on the back of the Tesla model is is very large and for sure produces high electromagnetic field around it. I assume Tesla took the measures for shielding it but I was looking for a more professional measured numbers reply. If someone has the numbers.
Also the rear seat in the Tesla will be used by kids which are much more sensitive to the effects of EMF and do not have the above exposures you refer to from cell phone use.
Tesla team, do you have measured numbers you can share?

"This is not correct about the earbuds or headsets and one major difference is that I use my headset for 10 minutes a day and drive me car for hours a day."

Haha, I would have expected it to be the reverse or at least closer to even for many people.

I don't care about EMF. I'll bathe in it. It gives me super powers!

If you're concerned, then I think maybe you should move to the moon.

I'm not worried about EMF, but has anyone considered the impact of a 25' coil of wire with 80 amps being fully electrified while the car is charging? I'm thinking here about a magnetic field being set up around the coil.

With 25' of cable on the HPWC, but with it mounted 3' from the charging port, there is a lot of excess cable.

Nothing to worry about is there?

Ken,

No, there's nothing to worry about. You might as well worry about your house wiring or your electric stove. Let's put it this way: If you smoke, you don't need to worry about any other health issues. If you don't then weight and/or alcohol are what you should worry about. EMF is about number 10,000 on the list. Millions of people have sat for years in front of CRT screens with no ill effects.

Maybe if we line them up properly we could generate 5 Tesla images? (MRI joke folks :o)

I wasn't really worried about health, but the magnet attracting metal objects. But I guess not ...

If someone has a real valid professional answer please reply. We can skip all the guessing answers.

Thank you.

While I have read many older tesla blogs on the topic and am comfortable there should not be an emf issue my wife is very concerned what the emf readings in the Model S will be like during charging. This is important to us since our garage is directly below our 7 yer old sons bedroom. Wold greatly appreciate if customers or tesla could provide accurate data on is this during charging before I confirm/ finalize my order Thanks!

When the "valid professional" tells you the actual numerical value of the electromagnetic fields how will you react? Will you insist it should be zero, unlike every grid-connected building in the world? Will you forever worry about it while you drive the car?

How can you travel down a street or highway behind cars and trucks that are designed so the owners leave the stinky gases behind them for others to breathe in? If that were safe, why isn't the "tailpipe" shortened to save money?

The most dangerous thing about driving the Model S is getting into an accident while going at high speed. While the car is designed to minimize that danger, it is quite real and (statistically) measurable.

Fear of EMF is not measurable, and hazards of EMF exposure at less than microwave frequencies have yet to be shown at all, and exist only in the minds of the imaginative.

Microwaves can burn tissue. Ultraviolet radiation can cause skin cancers. XRays and other high energy particles (the higher the frequency, the higher the energy) can cause cancer.

Perhaps the CDC hasn't issued a warning about house wiring because of a conspiracy? Ooooohh...

Relax. Enjoy life. Stop worrying about nothing. If you want to worry, make it about real things. There are plenty of people dying of famine, war, disease, etc. Worry about that.

As for EMF fields during charging, they're the same type as those emitted during use of any electrical appliance. If the current is high, the EMF is high. But if you double the distance from it, you lose 3/4 of the field strength. So if your charging cabling is ten feet from your son and the current is ten times that of the light one foot away from him, then the car charging is giving one tenth the field that the light is. (1/10 * 1/10 * 10) If you're not worried about house lighting and other "plugged in things", don't worry about the car or its charging.

g'day,
Tesla has in the past advertised for EMI/EMR specialists and there are numerous patents applied for and some granted to Tesla Motors.

Issued patent US8242739 indicates that the AC motor does have some EMI filters in at least one AC motor design.

You may be able to give someone a call at Telsa and have a chat with them. There's a variety of folks' names listed on the designs, I'm sure that in some form they'd be able to talk about their testing.

Turn off the monitor on which you are reading this, now! It is zapping you up close with more EMF than Tesla charger at full load.

Some people need to relocate to 1700, stat. Life expectancy, about 43.

As an engineer and former nuclear power plant operator specializing in radiological controls I am confident there is nothing to worry about with emf from the model s.

That being said, the car is so awesome I might still buy it even if someone demonstrated that there was a chance my testicles would shrivel up and fall off from driving it.

tesla.mr... +1. Funny.

Note that the EMI filters they put on the motor was strictly to stop any radiation from interfering with other equipment as per FCC rules. Otherwise you might "hear" the motor when the radio was on, or it might disturb cellular communication or WiFi.

The filters were not put in to reduce the EMF going through people. As an engineer, I've worked on projects that had to put on similar EMI (ElectroMagnetic Interference) filters.

I've read threads on a lot of different subjects on this forum, and I must say, it is striking how different the tone of the responses is on this one than on any other one. It's a perfectly legitimate question, but it seems that people are more concerned about setting their own minds at ease by ridiculing it.

If you don't know the answer or don't care about the issue, then why don't you just go elsewhere on the forum or keep quiet?

I can rebut many of the ridiculous responses that are being given, but it's not worth it.

It's not really a legitimate question. I suppose there's nothing wrong with being curious if you really don't know, but we should not give the impression that there's some sort of serious medical/scientific debate going on.

There is no credible evidence that the kind of EM people are subjected to every day is harmful (bullet trains, power tools, power lines, elevators, cars, cell phones, and on and on)

EM fields and electromagnetic radiation (which includes radio, X-ray, etc) are not the same type of thing.

The "concerns" that have come up are from people trying to claim living underneath powerlines has caused them some harm, same as people trying to scare you about flouride or vaccinations.

These "concerns" have been around for a long time (after all, large EM fields have been around for decades), and it has been studied.

To carry on as if there is a debate about the affects would be disingenuous.

It must be lower than even a low 0.3 Tesla MRI because otherwise they would've had to have pacemaker warnings on the Roadster and the S.

Not saying its nothing, but I suspect it gives off less EMF than an iPad.

re: olanmills

Your response is qualitatively different than many of the others that were given, both in tone and substance. It's a legitimate response, without ridiculing the question.

However, while it may be true that no health effects from EMF have been proven, I believe the converse is also true. It has not been proven that there are not any long term health effects from prolonged exposure. Also, riding on top of a powerful battery in an enclosed area is a bit different than being 30 feet below power wires in an open area.

I'm not saying there is an adverse health impact; I'm saying the jury is still out. For me personally, I don't intend to let it stop me from buying my Model S.

Hard to prove a negative like that. Prove you are not the Queen of the Space Unicorns in disguise!

Remember that electromagnetic radiation drops with the square of the distance from the source. So the passenger compartment (front especially but also back seats) are located many inches (if not many feet) away from the motor and motor controller. I expect that there will be a very low (comparable to background magnetic fields in your living room).

In any event, I (really) do have an industrial gauss meter and will post some readings after my Sig arrives.

Note to Tesla: you really should push my car to the front of the queue so I can make these readings post haste!

Re: Brian H.

My point is that it is an area that is under active investigation currently. It is actually possible to prove a negative. It's not the same as, for example, trying to prove that you never did or never said something.

Anyway, I'm signing off. I'vr had enough of this topic.

Cheers!

The wording of the negative(s) can be tweaked indefinitely, requiring impossible numbers of "samples" and measurements. Calculations show there is little or no EMF for the passengers. Prove that there is.

Ybachar-

As much as everyone would like to ignore this question, it is most certainly relevant from a cell biology perspective. You'll notice from one of the threads above (or another) that I got beat up pretty badly when discussing it several months ago. This board is probably not the proper forum for an in depth discussion of this topic. To be clear, this is not a criticism of Tesla or the car, but intelligent humans need to be aware that the final word on EMF safety is most certainly not in. There is no debate that EMF can and does affect cellular function. The question is whether the effect is pathophysiologic. I discussed this issue with a Tesla engineer two years ago and I can tell you that occupant EMF exposure was definitely a consideration that factored into the final design of the car (to Tesla's credit). There is ongoing investigation into the effects of low and high level EMF on biological systems. You will hear more about this topic as the peer-reviewed data becomes available. Smoking and low level ionizing radiation seemed pretty harmless in the fifties. Keep an open mind.

+1 Bennett R- More to learn in other topics at this time.

I'm going with the null hypothesis until i see evidence to the contrary.

I'm not too worried about the DC battery. If anything,I'd be concerned with the PEM that produces variable frequency AC.

I've probably got a few hundred yards of 120 and 240 VAC running through my walls and ceilings, and DC resistive heating in the two upstairs floors, and 120 AC resistive heating in the basement.

Come to think of it, I've probably got a lot more wire than I thought.

Besides, once I got used to the idea of growing a second head, I found it quite usefull as he scans this blog when I'm sleeping. I miss the family jewels, but my breeding days were over, and besides, they probably needed to go. The doctor seemed rather frightned.

@ken I wasn't really worried about health, but the magnet attracting metal objects.

Magnetic fields weaken fast with distance, you can hardly measure it outside of the car at all. Also aluminum resists magnetic fields, so that works as natural shield. Also it is three-phase rotating field, each phase combined would be zero field, so at the outside of the motor there is practically no field at all. Definitely nothing that affects human tissues, except by nutjobs imagination-caused placebo-effect. Fumes from gasoline engines would be about gazillion times more dangerous. Mildly speaking.

@ken;
There is no magnet in the TM motor. The magnetic fields are generated "on demand" by current in the coils. No permanent magnet, no rare earths, etc. Most advanced on the planet, AFAICT.

BTW, how doesn't it concern these people that ICE cars have exactly same things. They have generator which is basically a electric motor in reverse, coil to increase battery 12V to kilovolt-area, spark plugs that cause a very strong pulsing EMF. Car stereo system loudspeakers are much closer to passengers than electric motor in BEV and those have variable frequency magnetic fields. All the fans into cabine that blow air in it have small electric motors.

etc. etc. etc.

Those of you who have been driving Roadsters all these years, I'm afraid I have some bad news - you're going to die someday. It might not be from your emf exposure, but if not it will be from something else.


X Deutschland Site Besuchen