Hi,
I regularly use chokes (inductors) in power supplies. These coils store
energy and act as filters.
One way of looking at a coil (choke) is like this...
If you apply a voltage to a coil nothing happens until some time later,
when the current starts to build up step by step. This can happen fast
however with small chokes. Once the current builts up, you cant stop it
too easily. Even if you open circuit the choke that current tries to maintain
itself in keeping the current constant, at least for a short time period.
After a longer time period all the energy dies out.
Thus, the inductor acts like a constant current for short time periods.
If you look at the current as a pulse voltage is applied, you see the current
ramp up in an inductor (coil, choke).