Can anyone give me a clue on how much power a T130-2 core can handle?
I'm still a noob with this inductance/inductor stuff, so please forgive me if the question is worded incorrectly.
I'm interested in replacing some 10uH and 20uH inductors with gapped ferrite toroids. The data for the size and permeability of the new cores gives me max current ratings of 12.25A (10uH) and 17.32A (20uH). That's assuming I got the math correct (big assumption there).
I just need to know if the gapped cores have substantially less power handling or not compared to the T130-2.
Thanks
I'm still a noob with this inductance/inductor stuff, so please forgive me if the question is worded incorrectly.
I'm interested in replacing some 10uH and 20uH inductors with gapped ferrite toroids. The data for the size and permeability of the new cores gives me max current ratings of 12.25A (10uH) and 17.32A (20uH). That's assuming I got the math correct (big assumption there).
I just need to know if the gapped cores have substantially less power handling or not compared to the T130-2.
Thanks
As a first approximation, see this link:
Amidon IRON POWDER TOROIDAL CORE
Knowing current and voltage, you can estimate power, then given frequency, choose a core. Check if it doesn't saturate, and that it can dissipate power lost in the core and wire without exceding temperature rising.
Good luck.
Amidon IRON POWDER TOROIDAL CORE
Knowing current and voltage, you can estimate power, then given frequency, choose a core. Check if it doesn't saturate, and that it can dissipate power lost in the core and wire without exceding temperature rising.
Good luck.
No kidding.
Haha, thanks though... I'll go chew on this for awhile and see if I can manage to swallow it down.
I am still working on the sheet, So need not be error free.
See if this could be of any help to you. I am working using micrometals core in mind.
attached sheet.
See if this could be of any help to you. I am working using micrometals core in mind.
attached sheet.
This app note has a bit of info in it about core size and power dissipation: http://www.micrometals.com/appnotes/appnotedownloads/ipcs4rfp.pdf
Powdered iron cores technically have an air gap that is distributed evenly throughout the entire core. So try not to think of power handling as a function of the size of the air gap.
Hi Brian, nice to see you're still lurking in the shadows. 
Some of the math and general comprehension required here is beyond me. I'm just going to do what I always do and run with what little I understand and hope for the best. 😛
I'm pretty sure the Ferroxcube cores I'm interested in are more than sufficient for my needs anyway.
Some of the math and general comprehension required here is beyond me. I'm just going to do what I always do and run with what little I understand and hope for the best. 😛
I'm pretty sure the Ferroxcube cores I'm interested in are more than sufficient for my needs anyway.
When life permits I make my way back here once in a while 😉
Are the ferroxcube cores the same ones used on other fairly high output power class d amps? If so, you should probably be fine.
When in doubt, look at what other amps with similar power ranges are using and use that as a baseline.
Are the ferroxcube cores the same ones used on other fairly high output power class d amps? If so, you should probably be fine.
When in doubt, look at what other amps with similar power ranges are using and use that as a baseline.
I was tempted to just assume that at first, but they do custom parts so I started thinking maybe some of these OEMs had parts made with lower permeability than the standard gapped cores.
Stacking cores is always an option to if space permits.
One more thing; are the inductors on the icepower amps wound common mode? Trying to understand which direction the two windings go. Should have payed more attention when I actually had one in front of me.
The gray one in this pic...
The gray one in this pic...
An externally hosted image should be here but it was not working when we last tested it.
- Status
- Not open for further replies.