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Replies to post #69494 on Tesla Inc (TSLA)
Witnesses told the Sheriff's deputies that the Tesla was speeding at a high rate of speed southbound on Seacoast Blvd when it suddenly veered into the oncoming traffic lanes and hit the curb/sidewalk.
The car went airborne and flipped into the Tijuana Sloughs National Wildlife Refuge. The male driver got out of the car and attempted to flee north along the street, but deputies who were responding were able to detain the driver. A female passenger was extricated by Firefighters and she was transported to a local hospital with unknown injuries.
The driver told the Deputies that the Tesla had simply taken off on its own and was driving itself. The male may be DUI and was letting the car drive itself. it’s not known why the male fled the scene.
09/15/22 8:51 AM
GIC are often described as being quasi direct current (DC), although the variation frequency of GIC is governed by the time variation of the electric field. For GIC to be a hazard to technology, the current has to be of a magnitude and occurrence frequency that makes the equipment susceptible to either immediate or cumulative damage.
GIC modelling and simulation are typically below 50 mHz.
Using thick conductive metal material such as steel, which often works well, but the drawback is the weight. Aluminium or magnesium are much lighter than steel, but they have insufficient low-frequency shielding properties and, therefore, cannot be used in this application.
Generally, below 100 kHz, steel achieves much greater attenuation than copper.
low carbon steel is typically specified for DC and low frequency magnetic shielding high permeability and saturation point than high-carbon steel
Magnetic field lines prefer to travel in materials that have certain magnetic properties, namely materials with high permeability. By placing a material of high permeability (or at least a permeability higher than the region in question) around the region you wish to shield, you effectively offer the field lines a better path to travel.
“We’re rapidly changing alloy constituents and forming methods, so traditional names like 304L will become more of an approximation.”
Alloy 304L a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304L has a carbon maximum is 0.030
Any process which can change the crystal structure of stainless steel can cause austenite to be converted to the ferromagnetic martensite or ferrite forms of iron. These processes include cold working and welding. It is also possible for austenite to spontaneously convert to martensite at low temperatures. To complicate matters further, the magnetic properties of these alloys depend on the alloy composition. Within the allowed ranges of variation of Ni and Cr, significant differences in magnetic properties may be observed for a given alloy.
Thus, a shell of high permeability material built around an area will effectively keep most of the magnetic field lines in the actual shell itself and out of the area inside the shell.
https://www.kjmagnetics.com/images/blog/article2010.01.pic3p.gif The team has been focused on creating new alloys for its products, like new aluminum alloy for casting larger parts in Tesla vehicles or new stainless-steel alloys for SpaceX’s starship and Tesla Cybertruck’s exoskeleton.
Now, we learned that Tesla is creating a new Materials Applications Team to help integrate those new materials faster.
We’re rapidly changing alloy constituents & forming methods, so traditional names like 304L will become more of an approximation
— Elon Musk (@elonmusk) July 21, 2020
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