Replies to post #68040 on Tesla Inc (TSLA)

[boston745]

Big difference between 12v vs 360v. Greater the voltage the bigger the magnetic field, greater the induction. So its not simply wire length.

Impact of electromagnetic interference on the functional safety of smart power devices for automotive applications

 Fault conditions such as over temperature, short circuit or loss of load must therefore be reliably diagnosed by these devices and any kind of errors must be dependably reported to a controller unit. In this paper, the susceptibility of smart power high side switches during electromagnetic interference has been investigated.

It is shown that there are significant deviations from the immunity limits that are commonly requested for ICs used in automotive applications. For example, it could be observed, that an over temperature of the smart high side switch might not be correctly detected by a control unit in the presence of electromagnetic interference and in a wide frequency range of the disturbing signal the device leaves its safe over temperature shut down mode and turns on again. The latter especially endangers the functional safety of the motor vehicles.
Future autonomous driving cars will have to rely tremendously on reliable and functional safe electronic systems that will work properly also in the presence of electromagnetic interferences, therefore special care should be taken in order to ensure the electromagnetic compatibility of the electronic systems used in vehicles.

https://link.springer.com/article/10.1007/s00502-018-0633-4

Si3N4 has the ability to insulate these ICs to help prevent them reaching fault states that lead to accidents we are seeing in vehicles with autonomous systems...like Teslas.