Andy87
September 4, 2019, 11:45am
22
Yes they blow up and they for sure can’t handle 280A and 800A burst
Most anti spark switches available have the same issue.
Most “inrush limiter circuits” fail because they are operating in linear mode during inrush. It’s a design limitation on almost every one.
Imagine a FET is a resistor with a variable resistance. When it’s “off” the resistance is [nearly] infinity and when it’s “on” the resistance is [nearly] zero. That’s all fine and dandy until you add capacitors to the load, like the filter capacitors on VESC and other ESCs. Right when it turns on, it’s effectively a momentary short circuit with [not really…]…
And this
UPDATE
Flispky’s new smart antispark is an implementation of the V1.
There is a hardware revision for the V1 to get its current draw from 2.5mA down to 300-400uA, but it will most likely have to be implemented in future production runs. I realized my mistake too late and after the first fab order was put in. Prototype testers reported no issues with the antispark draining the battery. I also left one of these in my board for like two (three? some long ass time) months and it went from fully ch…
Which should help to understand why they fail.
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