Replies to post #69741 on Tesla Inc (TSLA)

[boston745]

You're still talking about insulating not shielding. So I'll repeat myself, because Titanium can align to the magnetic field its exposed to, it becomes magnetic, making it a bad candidate to either insulate or shield. Thats because its permeability is too low, as you keep pointing out, to provide good shielding effect and because it can become magnetic it cannot effectively insulate. Silicon Nitride and other such ceramics are superior to titanium at electrically insulating. Steel is one of the best shielding/attenuating materials for low frequency electromagnetic interference.

[boston745]

Not specifically about cars but it explains the purpose of shielding and insulating. So Cybertruck exoskeleton job is to effectively shield electromagnetic interfering signals from getting into the car and exposing sensitive ICs. To insulate is to use a non conductive material to separate these ICs from the exoskeleton so the electrical waves do not transfer from the shielding material to the ICs and interfere with their signaling. Current Teslas do not have this exoskeleton and thus are more susceptible to EMI than what the Cybertruck will be able to be exposed to. Elon Musk has said that the Cybertruck has hidden features and shielding EMI is one of those features.

Cable shielding functions as an electromagnetic energy interceptor: it prevents electrical interference from traveling to the cable’s center conductor and disrupting the data signal. In addition to blocking renegade electrical waves, shielding also ensures that any potentially disruptive energy is disposed of through efficient and proper grounding. In order for shielding to effectively perform its duties, it needs to be highly conductive, and typically comes in two forms: wire braid and foil.

While insulation offers no protection against electromagnetic interference, it helps shielding to work effectively – and the cable as a whole to function properly – by keeping the center conductor and shield material from coming into contact with each other.