seymourfroggs
- Sep 29, 2014
- 13
- Joined
- Sep 29, 2014
- Messages
- 13
Hello
In a circuit where a short burst of current through a coil opens a valve, I need to estimate the time to reach a certain current level.
The point is that there are two resistances, but I think only that of the coil matters. This is key to my question.
We simply have 15 v applied across the circuit. There is 5.6Ω in series with the coil, whose resistance is 0.15Ω. The coil's inductance is 0.15 mH.
So tau is L/R and my question is is tau 10^-3 from 0.15/0.0015 ? Or is it (0.15 + 5.6)/0.0015?
I need to find the time to reach 5 A in the coil but I can do it if I know the value of tau.
Thank you!
Seymour
In a circuit where a short burst of current through a coil opens a valve, I need to estimate the time to reach a certain current level.
The point is that there are two resistances, but I think only that of the coil matters. This is key to my question.
We simply have 15 v applied across the circuit. There is 5.6Ω in series with the coil, whose resistance is 0.15Ω. The coil's inductance is 0.15 mH.
So tau is L/R and my question is is tau 10^-3 from 0.15/0.0015 ? Or is it (0.15 + 5.6)/0.0015?
I need to find the time to reach 5 A in the coil but I can do it if I know the value of tau.
Thank you!
Seymour