B
Bernhard Kuemel
Guest
Hi!
How do I calculate the saturation current of this P-core:
http://ferrite.ru/uploads/pdf/products/pot/p_18_11.pdf
Ordering code: B65651+0400A048
Gap: 0.1 mm
Material: N48
l_e=25.9 mm
mu_e=192
Ferrite N48
www.epcos.com/blob/528870/download/3/pdf-n48.pdf
Flux density (near saturation) (f = 10 kHz) B_S (25 °C)= 420 mT
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/toroid.html says:
B*2*pi*r=mu*N*I
So I assume substituting 2*pi*r with the core length will work
aproximately with a P-core, I do:
NI=B_S*l_e/mu = 0.42 mT * 0.0259 m / (192 * 4E-7 * pi) = 45 A
I don't believe 45 A. I have a 26/16 P-core (without specs, 26 mm
diameter, 16 mm high (per set with 2 halves)) with saturation current of
3.5 A. Even though the P1811 has 0.1 mm gap 45 A seem too large.
I want to know this before I buy the core.
Thanks, Bernhard
How do I calculate the saturation current of this P-core:
http://ferrite.ru/uploads/pdf/products/pot/p_18_11.pdf
Ordering code: B65651+0400A048
Gap: 0.1 mm
Material: N48
l_e=25.9 mm
mu_e=192
Ferrite N48
www.epcos.com/blob/528870/download/3/pdf-n48.pdf
Flux density (near saturation) (f = 10 kHz) B_S (25 °C)= 420 mT
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/toroid.html says:
B*2*pi*r=mu*N*I
So I assume substituting 2*pi*r with the core length will work
aproximately with a P-core, I do:
NI=B_S*l_e/mu = 0.42 mT * 0.0259 m / (192 * 4E-7 * pi) = 45 A
I don't believe 45 A. I have a 26/16 P-core (without specs, 26 mm
diameter, 16 mm high (per set with 2 halves)) with saturation current of
3.5 A. Even though the P1811 has 0.1 mm gap 45 A seem too large.
I want to know this before I buy the core.
Thanks, Bernhard