| Electronics > Beginners |
| How do I measure various parameters of a ferrite toroid |
| << < (4/5) > >> |
| 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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