Forrest Christian <forrestc <at> imach.com> writes:

>=20
> So I'm looking for ideas, and information.
>=20
> I have 0.05 ohm shunt resistor which I need to protect from overcurrent=20
> (effectively overvoltage).   It's measuring steady-state current, and=20
> also being used for overcurrent trip purposes.  In certain=20
> very-high-current 'dead short' situations, this poor component becomes=20
> less of a resistor and more of a fuse - I'd like to prevent that,=20
> bypassing some of the current long enough for the trip to occur - a few=20
> ms at most.
>
Taking it on another angle from what's being posted so far:

Where the in-rush current go (I presume it's not cold filaments of vacuum
tubes?). If it's filter capacitor, does the current sensor have to be befor=
e it?
Maybe put a current-limiting resistor in series with the battery, and shunt=
 it
off with MOSFET once current settles close to "normal" range?

Sergey Dryga
http://beaglerobotics.com




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