- #1

lichen

- 24

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I wonder if anyone can give me some quick advice.

I'm designing a physically small (but high current) pulsed solenoid. The circuit will basically be an RLC circuit where a switch is thrown to discharge the capacitor into the coil, giving a strong short-lived magnetic field.

I'm doing all right with the design so far, but I am having trouble getting an idea of the temporal characteristics of the pulse - i.e. how the current through the solenoid will increase then decrease over time. I know that roughly speaking it will have a growth period defined by the initial inductive resistance to current, followed by a decay.

Can anyone mathematically quantify the time situation here for me, in terms of R, L, and C? The R may be a small resistor in the circuit, or it may simply be the wires/coil resistance - shouldn't matter.

Many thanks.

- Lichen