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Since the unwanted interference is from sparkplug, I wonder - assuming it would contain no additional electrincs, could they get some EV? Or does the electric e

Since the unwanted interference is from sparkplug, I wonder - assuming it would contain no additional electrincs, could they get some EV? Or does the electric engine itself generate noise by necessity?

genewitch 2y ago
EV are so noisy they talked about doing away with AM radio in the US because the EV jams it. I am unsure what would lead to this question...
- panstromek 2y ago
  hm, yea, I guess it was a dumb question. Spinning magnets for sure must generate noise.
  - p_l 2y ago
    It's possible to deal with it, but one must want to deal with it, plus the "costs" like increased weight, BOM, etc. EV makers don't want to and it's a problem even with the very low bar is consumer equipment
    - panstromek 2y ago
      yea, my question was more about whether this is more about the redundant additional electronics in newer cars, or just EV car problem in principle.
      - p_l 2y ago
        Mostly EV components - the motors and inverters that drive them can generate a lot of EM noise.
- namibj 2y ago
  That's not because they have to, though; especially if quietness in a narrow band is required. It's just way cheaper and somewhat more efficient to abuse the motor as the inductor to filter the hard switching.
  - genewitch 2y ago
    explain how you make something quiet in a "narrow band" around things that are so sensitive that it was claimed that "if you integrated all of the signal power received by the antennas, it's less than the energy used by a flea to jump". not just at any given moment. In the career of whoever said that, the total power was that miniscule.
mikewarot 2y ago
It's possible to build a control system and inverters for an electric vehicle that don't spam RFI everywhere, it won't be anywhere near as small, as all the filtering required is going to be quite sizeable. (And no, I'm not suggesting using analog/linear systems, that would be silly huge and get super hot) The motors are brushless, so if all of the drive power is low frequency and well filtered, it'll be nice and RF quiet.

genewitch 2y ago

EV are so noisy they talked about doing away with AM radio in the US because the EV jams it. I am unsure what would lead to this question...

panstromek 2y ago
hm, yea, I guess it was a dumb question. Spinning magnets for sure must generate noise.
- p_l 2y ago
  It's possible to deal with it, but one must want to deal with it, plus the "costs" like increased weight, BOM, etc. EV makers don't want to and it's a problem even with the very low bar is consumer equipment
  - panstromek 2y ago
    yea, my question was more about whether this is more about the redundant additional electronics in newer cars, or just EV car problem in principle.
    - p_l 2y ago
      Mostly EV components - the motors and inverters that drive them can generate a lot of EM noise.
namibj 2y ago
That's not because they have to, though; especially if quietness in a narrow band is required. It's just way cheaper and somewhat more efficient to abuse the motor as the inductor to filter the hard switching.
- genewitch 2y ago
  explain how you make something quiet in a "narrow band" around things that are so sensitive that it was claimed that "if you integrated all of the signal power received by the antennas, it's less than the energy used by a flea to jump". not just at any given moment. In the career of whoever said that, the total power was that miniscule.

mikewarot 2y ago

It's possible to build a control system and inverters for an electric vehicle that don't spam RFI everywhere, it won't be anywhere near as small, as all the filtering required is going to be quite sizeable. (And no, I'm not suggesting using analog/linear systems, that would be silly huge and get super hot) The motors are brushless, so if all of the drive power is low frequency and well filtered, it'll be nice and RF quiet.