RF Man Discusses Core Saturation Of Inductors and Ferrite Materials

[@AmbientHex]

Great explanation and demonstration of "induckta" saturation. Thanks!

[@vk2zay]

I see you borrowed the diagram from my 2008 inductor saturation tester article on my website. Glad it was useful! I liked the display of the different inductances and saturation points of different material ferrite beads with the same number of turns.

[@Greg_Chase]

This was a fantastic "Compare and Contrast" on inductor core permeability - nice job! Keeping in mind that magnetic fields are manifest when electron spins are aligned (discovered in the 1920s): TAKEAWAYS 1) the higher permeability materials have more electron spins per unit area (that's just the nature of increasing permeability in ferrite core material) 2) free space does not saturate (air core inductors remain linear) - free space has very low permeability 3) the lower permeability ferrite cores have fewer electron spins per unit area than can be aligned, so that they are 'more like' free space than ferrite cores with lots more align-able electron spins The closer the ferrite core's permeability gets to free space, the more linear the response, and the less prone to saturation it is. The tradeoff is, particularly with transformers, lower permeability cores do not couple as much magnetic field into the secondary winding. The higher the permeability of the core, the larger its B field and the more magnetic field it couples onto the secondary winding .

[@monolito8556]

wonderful RF man, im playing with ferrites these days and this will help me alot, thank you so much

[@justme-n-gracie]

Excellent presentation.

[@thunderbuilt77]

Nice presentation. Good to see coverage of a topic here not often explained. Keep them coming. Video on design/build of input/output transformers would be awesome.

[@rfmanchannel6915]

I will see what I can put together for RF Transformers....

[@thunderbuilt77]

@@rfmanchannel6915 That would be cool, thanks.

[@JamesJohnson-ny3xz]

Still Learning, Thankyou James.

[@KraussEMUS1]

This probably will save the day, Thanks a lot!!

[@de_w8tam]

Today I learned! Thank you for sharing!

[@MunnaKumar-sc7qo]

What is the frequency?

[@W1RMD]

Nice video. At what frequencies did you test these? Don't you have to test them for the frequency range of desired use? Thanks.

[@XPCTECH]

Great Video, Thanks!

[@rfmanchannel6915]

Thanks for your feedback!

[@marcotulio-analogchannel306]

Thanks for sharing!

[@Frohicky1]

Is it that the flux density drops, or that it fails to keep rising?

[@fernandohood5542]

Can you determine the saturation point if u know the inductance and voltage step?

[@john22852]

good job very interesting

[@rfmanchannel6915]

Thanks for your feedback!

[@manwar999]

could it be possible to almost' totally cancel out all permeability of core using only current?

[@dalenassar9152]

Can an air-core inductor ever saturate? ALSO: When a cored inductor is saturated, does it just have the same inductance as if it were air-core?? THANKS MUCH!!

[@bingosunnoon9341]

How about selecting core material to operate at 500 Hz ? How is that selected?

[@donnaankstitus7092]

Good demonstration. However you dont mention the frequency at which you test, It makes a big difference with ui and uii,

[@dennispeake1877]

I'm wondering about your material 61 with the wire you use. If you're using high volts in that circuit, would you use Teflon wire for high temperatures?

[@philradford2717]

RF Man, Thanks for the informative video. I bought one of the single LDMOS amps from you and I want to use it only on 50.125 to 50.400mhz in the 6 meter band, do I need to change the input and output transformers for better efficiency on those frequencies? Keep up the work! Phil N4STC

[@LaboratoryW]

Nice job! 73!

[@ekiskaliburnirvana9047]

Firstly, wind coils to get the same inductance and after that test the core saturation

[@dalenassar9152]

You state "INDUCTANCE WILL INCREASE 4 TIMES PER TURN". In a tech note for inductance vs #turns, it states that the increase is "N squared" where N is the # of turns. This means, that for each additional turn (after the 1st) the inductance will increase by: 4, 9, 16, 25, 36, 49,...... Is this incorrect?? THANKS FOR THE GREAT VIDEO!!!

[@gareth40]

What happened to the video RF Man Discusses Transmission Line Effects?

[@rfmanchannel6915]

I reposted this video for you.