Electronics > Beginners
How do I measure various parameters of a ferrite toroid
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T3sl4co1l:

--- Quote from: ZeroResistance on October 01, 2018, 06:44:35 am ---Then using all these, determine the saturating flux density of the core?
Er! But how to calculate the max flux density in the core?  :-/O

--- End quote ---

Putting it all together: Bsat = t_sat * Vcc / Ae. :)

A Hall effect sensor measures H (magnetic field intensity), in an air gap -- not actually more accurate, when you want to measure the flux inside a high permeability magnetic path! ;)

Tim
coppercone2:
they need equaations on this forum so bootleg
ZeroResistance:

--- Quote from: T3sl4co1l on October 01, 2018, 07:42:16 am ---
--- Quote from: ZeroResistance on October 01, 2018, 06:44:35 am ---Then using all these, determine the saturating flux density of the core?
Er! But how to calculate the max flux density in the core?  :-/O

--- End quote ---

Putting it all together: Bsat = t_sat * Vcc / Ae. :)

A Hall effect sensor measures H (magnetic field intensity), in an air gap -- not actually more accurate, when you want to measure the flux inside a high permeability magnetic path! ;)

Tim

--- End quote ---

Ok, so the (t_sat * Vcc) part is actually Volt-seconds right and that equals flux ??   :-//
I agree that B = flux / Area
Secondly if we have 10 turns wound on the core? do we also multiply the Volt-seconds part with the Number of turns?
GadgetBoy:
Just a nubbin thought. Would a gaussmeter be useful for this?

Sent from my ONEPLUS A3000 using Tapatalk

ZeroResistance:

--- Quote from: GadgetBoy on October 01, 2018, 11:59:50 pm ---Just a nubbin thought. Would a gaussmeter be useful for this?

Sent from my ONEPLUS A3000 using Tapatalk

--- End quote ---

Noble thought  :-+ However as T3sl4co1l said earlier how do we insert a gaussmeter in series with a high permeability magnetic path without disrputing the very thing we are measuring itself. AFAIK gaussmeter can measure fields which are leaking out of a core / wire etc. But it cannot sense what is happenning inside a magnetic core.
Unless the gaussmeter uses some method of transformer action, I don't see how it can see inside a closed magnetic core like a toroid, It might be useful when the core geometry is open like a rod core?
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