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DC Choke

Discussion in 'Electronic Basics' started by Andrew, Nov 7, 2005.

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  1. Andrew

    Andrew Guest

    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!
     
  2. Andrew

    Andrew Guest

    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).
     
  3. 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
    http://www.jwmiller.com/pdf2/1140.pdf
    Drum core
    http://www.jwmiller.com/pdf2/1140.pdf
    By thew way, either type is quite easy to build, yourself (especially
    the drum core type), since the number of turns is pretty low.
     
  4. Jamie

    Jamie Guest

    http://www.caddell-burns.com/sys-tmpl/index/
     
  5. kell

    kell Guest

    Buck and a half from BGMicro.com
    http://www.bgmicro.com/search1.asp?sid=
     
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