4 ms·
Perhaps they should add a capacitor [bank] there?
by vardump 3y ago
Perhaps they should add a capacitor [bank] there?
- dragontamer 3y ago10V swing for 0.5 seconds (500 milliseconds) across 300 Amps is... a 1500 Farad capacitor. (not uF. Big F, full size Farad. Lol) Methinks that won't work, lol. The numbers discussed are pretty insane, to be expected of a car-sized load / amperage. ----------- What they need is a well designed power-network (Pi-network? Capacitor-Inductor-Capacitor-inductor-Capacitor) to isolate the microcontrollers + analog pedal reader from the rest of the car. PDF was spitballing ideas for a software-only detection of this brownout condition. But I don't like that, any uC / analog sensor circuit that has 10V swings on a 12V nominal circuit is just going to go haywire in unpredictable ways. I'm frankly surprised that the uC is still sending CANbus messages on the pedal state despite the 12V supply voltage swinging down to 2V. I guess TI and STM32 chips / ADCs have enough stray capacitance / local capacitors to survive even when the sensor network/analog circuitry is browning out in Teslas.