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Thread: EMF Radiation

  1. #21
    Darell, the EVnut EVnut's Avatar
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    It isn't that hard to shield against EMF. Yes it should be a consideration in designing any vehicle that emits a significant amount of EMF (and that means not just EVs!). But I'm a bit more concerned about how much benzene is given off by the millions of gas cars all around me. And of their carcinogenic exhaust. There are people who think nothing of the health and deadly consequences of standing around filling a gasoline tank that is venting to the atmosphere - and are worried about EMF exposure.

    I'm sure there are sevearl smokers who are worred about EMF exposure as well.

    It amazes me to see what we become complacent about and what we worry about. Mostly we tend to worry about anything new, or that we haven't yet thought much about. The OLD concerns don't matter since they haven't killed us personally yet.
    Darell, the EVnut
    Email me: darell at evnut dot com

  2. #22
    You're right Darell, it really is incredibly easy to incorporate EMF shielding into most products - and some manufacturers have done this. But so many are either too cheap or too lazy to take the tiny bit of effort to do this.

    So, Ben -- have you had a chance yet to take some updated measurements with the new meter? I'm looking forward to finding out if it uncovers anything at the higher frequencies.

  3. #23
    Senior Member malcolm's Avatar
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    More reading: Item from the TetraWatch website (campaigns against mobile phone masts)

    http://www.tetrawatch.net/papers/emr_epilepsy.pdf

  4. #24
    Roadster #108 and SSL #61
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    Quote Originally Posted by johnr View Post
    So, Ben -- have you had a chance yet to take some updated measurements with the new meter? I'm looking forward to finding out if it uncovers anything at the higher frequencies.
    I've ordered the EMF meter, and will post the results when I receive it, hopefully this week.

  5. #25

  6. #26
    EVs are here to stay Iz's Avatar
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    Thanks for the link TEG. A hybrid's battery is small relative to a BEV. Perhaps the best group to "study" are former EV1 owners, particularly those that drove the vehicle from '97 - '03.

  7. #27
    Roadster #108 and SSL #61
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    Some preliminary results, using my new 40hz - 100khz electric field meter. During charging the AC electric field is negligible; doesn't even register in the cabin, so <1 volt / meter. (Strong magnetic field though.) But while driving, I've measured peaks of about 20 volts / meter up near the headrests. Most of the rest of the cabin reads 0 - 2 volts / meter.

    Incidentally, sometimes my AM radio reception works fine, and sometimes it's abysmal. I recently figured out that not the drivetrain but actually the HVAC that kills the AM reception! Heater on, nothing but static and squealing. Heater off, clear signal. Go figure.

  8. #28
    Roadster #108 and SSL #61
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    For reference, the International Commission on Non-Ionizing Radiation Protection specifies the following guidelines on EMF exposure limits: General public, 24/7 exposure: 5kV/m electric, 1000mG magnetic. Since the highest peak EMFs I've measured in the Roadster are 20v/m and 50mG (under full acceleration), it's orders of magnitude below these limits. My Roadster recently passed the 5000 mile mark, and I ain't giving it back!

  9. #29
    Senior Member WarpedOne's Avatar
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    Ben W, thank you!

    Now we need someone to interpret those numbers. What do they mean? How do they compare to other electronics around us?
    I believe in Tesla as a concept, a brand, and a suite of products. No matter who conceived, started, runs, or maintains, I hope it ultimately prevails and lasts.
    -- TEG


  10. #30
    ERIC VFX vfx's Avatar
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    Quote Originally Posted by Ben W View Post
    Incidentally, sometimes my AM radio reception works fine, and sometimes it's abysmal. I recently figured out that not the drivetrain but actually the HVAC that kills the AM reception! Heater on, nothing but static and squealing. Heater off, clear signal. Go figure.
    Hey Ben,

    Thanks for doing this.

    Which radio do you have? When you say heater, does that include the seat heaters?

    For those not up on the lingo 5K = 5000

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