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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
I cant find a BH curve for some of TSC's ferrites. I really need to know the H value. Am I just not seeing it on there website? Surely any maker publishes this info, I mean every other maker Ive ever seen does. I only see a vague reference to the "15 Oersted" graph.
In my other apps, my ferrites from other makers are spec'ed to 5 Oe, but above 3 Oe their function starts to go down. So the H (Oe's) are an important factor.
My material is the -50ALL type seen here in this PDF. ]50allgraphpage.pdf[/file]
I guess i could calculate it given the change in slope of u = B/H ?
instead of going through the H Oersted direction i think i can go at it this way:
At = B(Ae/Al)
Where: At is ampere turns B is in Teslas Ae is area of center leg in meters Al is intuctance in Henries
And then:
At/m = (N x I)/Mp
Where: At/m is ampere turns per meter N is number turns I is current in amps Mp is magnetic path in meters
Or...
H = (0.4 x Pi x N x I)/ Mp
Where: H = Oerteds Pi = 3.14 N = Number of turns I = Current in Amps Mp = Magnetic path in cm
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TSC International ( H for Oersted )
