| Author |
Message |
Andrew
Guest
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 Posted:
Mon Nov 07, 2005 5:35 pm Post subject:
DC Choke |
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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!
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Andrew
Guest
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| Posted:
Mon Nov 07, 2005 5:35 pm Post subject:
Re: DC Choke |
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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). |
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John Popelish
Guest
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| Posted:
Tue Nov 08, 2005 12:07 am Post subject:
Re: DC Choke |
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Andrew wrote:
| Quote: | 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.
|
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.
| Quote: | What is the approximate size of a choke that will fit these
specifications.
|
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
| Quote: | 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!
|
By thew way, either type is quite easy to build, yourself (especially
the drum core type), since the number of turns is pretty low.
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Jamie
Guest
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kell
Guest
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| Posted:
Tue Nov 08, 2005 9:35 am Post subject:
Re: DC Choke |
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Andrew wrote:
| Quote: | 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!
|
Buck and a half from BGMicro.com
http://www.bgmicro.com/search1.asp?sid= |
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