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Hello,

I'm a new addition to this group. 1215 members? wow! I had to see what all the commotion was about.

A question to get rolling: How does a choke work? How are they made?

thanks.

Steve.

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hey ,

a quick response...it works as an inductor...which reduces the current but
doesn't consume the power...it also helps in increasing the current
slowly...

it is made up of coils...(mostly of cu or al..)

Regards :-),

--himanshu sharma

Himanshu,

a quick response...it works as an inductor...which reduces the current but
doesn't consume the power...it also helps in increasing the current
slowly...

The way I compared coils, chocks and otherwise, with capacitors was...

Inductance passes DC, and opposes AC (but that is frequency dependent)
A capacitor does the opposite, it blocks DC and pass AC (again frequency
dependent)

I can think of two common uses of a choke coil, in power supplies (in the
old days mostly, and RF circuits. In RF each stage of an RF amplifier
got it's power connection through an RF choke, which along with a
capacitor, kept the common power supply connections from coupling
RF between amplifier stages and prevented the oscillation that would
result otherwise.

In power supplies choke coils worked with filter capacitors to 'smooth'
the pulsating DC that comes from diode rectification of AC. In this
instance I would say that coils oppose change in current and capacitors
oppose changes in voltage.

Jim