DC Choke

Nov 07, 2005 4 Replies
A

I am looking for a DC choke that will handle roughly 10A continuous, and is ~ 150uH (100uH to 200uH). I'm not sure where to look to pick up one. It seems that typically chokes with high current are low inductance.



What is the approximate size of a choke that will fit these specifications.



BTW it is to be used in series with a DC motor with low inductance, in order to match the motor's inductance to a specific motor driver.



Hopefully these specifications can result in a choke that is roughly no larger than 8 cubic inches (~ 2" x 2" x 2").



Thanks!



Vote
Twitter Facebook LinkedIn
A

Sorry, also wanted to note that I am not interested in winding the inductor myself, it has to be commercially available (or custom made, commercially available).

Vote
Twitter Facebook LinkedIn
J

The energy stored in the magnetic field of an inductor is 1/2 * L*I^2, so for higher currents, the stored energy goes up fast. This implies larger, more expensive units for a combination of high inductance and high current.

The two most common forms for such inductors are probably powdered iron toroids and ferrite drum cores.

Here are examples from Digikey: Toroid, but a bit light on current

formatting link
Drum core
formatting link

By thew way, either type is quite easy to build, yourself (especially the drum core type), since the number of turns is pretty low.

Vote
Twitter Facebook LinkedIn
J

formatting link

Real Programmers Do things like this. http://webpages.charter.net/jamie_5
Vote
Twitter Facebook LinkedIn
K

Buck and a half from BGMicro.com

formatting link

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required