Hi there! We got a new website so we will need to update that link- but in the meant time feel free to use:: fair-rite.com/rod-permeability-calculator/
Hi! when tinkering around with stacked rods like you did in the video, I noticed that even the slightest gap between them led to a noticeable decrease in L, resulting in a lower calculated µrod and µi. Is there a way to take the air gaps into account in a formula? The formula for the effective path length used for toroids probably leads nowhere in this case, due to the magnetic circuit being open, not closed...? Thx!
The effective perm formula for toroids won’t be too helpful due to the difficulty in calculating the magnetic path length on something like a rod. What’s the total rod length and inductance? Do you have an approximate size for the gaps? Feel free to send your answers to ferrites@fair-rite.com and Mike will walk you through the best he can 🙂
Hi please would you share the Excel file to get the material plot I see on the web? It's for an university project thanks or even the equation muRod vs RodL/RodDiam
In the ferrite core video the calculations the units appeared to be cgs ones, but in this one the value of absolute permeability is 4pi x 10^-7 which is the value in the mks system. Why does the magnetic industry still use cgs units? In the 1960s in the UK we used cgs units in school Physics but on leaving school and attending Technical College I had to get used to mks units.
Ha..ha.. the Americans still use pounds, miles etc in day to day life all along. None of them cares about the SI units which came into Vogue in the scientific community ever since 1960 after the convention in Paris. In a way it is a bit arrogant to me, to be frank. De VU2RZA
@@subramanianr7206 In the UK we use a mix of metric and imperial units. Although the metric system has been taught in schools for many years, we still use miles for speed limit and other road signs and serve beer in pints in our pubs. Although the UK and US both use the International Yard and International Pound, which are defined in terms of the metre and kilogram, our liquid measures differ. Liquid measures seem to be expressed both in imperial and metric measurements for bottled drinks in both the UK and US.
Hey Mike, thanks for the video! Just one point -- the link to the online rod permeability calc doesn't seem to work anymore?!
Hi there! We got a new website so we will need to update that link- but in the meant time feel free to use:: fair-rite.com/rod-permeability-calculator/
Hi! when tinkering around with stacked rods like you did in the video, I noticed that even the slightest gap between them led to a noticeable decrease in L, resulting in a lower calculated µrod and µi. Is there a way to take the air gaps into account in a formula? The formula for the effective path length used for toroids probably leads nowhere in this case, due to the magnetic circuit being open, not closed...? Thx!
The effective perm formula for toroids won’t be too helpful due to the difficulty in calculating the magnetic path length on something like a rod. What’s the total rod length and inductance? Do you have an approximate size for the gaps? Feel free to send your answers to ferrites@fair-rite.com and Mike will walk you through the best he can 🙂
@@FairRiteProductsCorp Thank you -- will do!
Are both Manganese-zinc ferrites and Nickel-Zinc Ferrites magnetic?
We will be covering this in a video coming soon!
Hi please would you share the Excel file to get the material plot I see on the web? It's for an university project thanks or even the equation muRod vs RodL/RodDiam
In the ferrite core video the calculations the units appeared to be cgs ones, but in this one the value of absolute permeability is 4pi x 10^-7 which is the value in the mks system. Why does the magnetic industry still use cgs units? In the 1960s in the UK we used cgs units in school Physics but on leaving school and attending Technical College I had to get used to mks units.
Ha..ha.. the Americans still use pounds, miles etc in day to day life all along.
None of them cares about the SI units which came into Vogue in the scientific community ever since 1960 after the convention in Paris.
In a way it is a bit arrogant to me, to be frank.
De VU2RZA
@@subramanianr7206 In the UK we use a mix of metric and imperial units. Although the metric system has been taught in schools for many years, we still use miles for speed limit and other road signs and serve beer in pints in our pubs. Although the UK and US both use the International Yard and International Pound, which are defined in terms of the metre and kilogram, our liquid measures differ. Liquid measures seem to be expressed both in imperial and metric measurements for bottled drinks in both the UK and US.
@@Martock1017 oh, thanks 👍
De VU2RZA