Uploaded August 2025 | Updated September 2026, 1 week ago
#257 In this video I look at how a unknown magnetic core can be characterized. After going over the initial theoretical aspects, I proceed to test the inductance factor, initial permeability and complex permeability of a set of cores. While I already know what the cores values are supposed to be, its still important to observe how the measurement method will impact the values.
Related videos:
Magnetic Core Measurements: youtu.be/M2fjvlVvVBc
LTspice tutorial - simulating Magnetic Hysteresis: youtu.be/nBKC3eyqNyY
Measuring Magnetic Hysteresis: youtu.be/iO4bSZjfZoI
LTspice tutorial - Simulating inductors: youtu.be/65fNDRows90
LTspice tutorial - Modeling transformers: youtu.be/muUwe8X51oY
Useful links and further reading:
https://passive-components.eu/inductors-core-materials-and-their-losses/
tdk-electronics.tdk.com/download/540066/dbcde584d155cc270f5d5dbf1efec233/pdf-generaldefinitions.pdf
https://pa3a.nl/wp-content/uploads/2022/02/Measurements-With-The-NanoVNA-Part-4-Measuring-the-characteristics-of-unknown-toroids-and-identifying-them.pdf
coil32.net/ferrite-toroid-core.html
fair-rite.com/toroid-permeability-calculator
Special Thanks to all my supporters on Patreon!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics
#257 In this video I look at how a unknown magnetic core can be characterized. After going over the initial theoretical aspects, I proceed to test the inductance factor, initial permeability and complex permeability of a set of cores. While I already know what the cores values are supposed to be, its still important to observe how the measurement method will impact the values.
Related videos:
Magnetic Core Measurements: youtu.be/M2fjvlVvVBc
LTspice tutorial - simulating Magnetic Hysteresis: youtu.be/nBKC3eyqNyY
Measuring Magnetic Hysteresis: youtu.be/iO4bSZjfZoI
LTspice tutorial - Simulating inductors: youtu.be/65fNDRows90
LTspice tutorial - Modeling transformers: youtu.be/muUwe8X51oY
Useful links and further reading:
https://passive-components.eu/inductors-core-materials-and-their-losses/
tdk-electronics.tdk.com/download/540066/dbcde584d155cc270f5d5dbf1efec233/pdf-generaldefinitions.pdf
https://pa3a.nl/wp-content/uploads/2022/02/Measurements-With-The-NanoVNA-Part-4-Measuring-the-characteristics-of-unknown-toroids-and-identifying-them.pdf
coil32.net/ferrite-toroid-core.html
fair-rite.com/toroid-permeability-calculator
Special Thanks to all my supporters on Patreon!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: patreon.com/feszelectronics
![EMC tutorials - [3/3] Improving the LISN... sort of...](https://i.ytimg.com/vi/M_ab0Oz2ypI/mqdefault.jpg "EMC tutorials - [3/3] Improving the LISN... sort of...
#127 In this video I try to improve on the original design of the LISN by addressing some of its issues and taking a more detailed look at the inter-channel isolation. Things dont turn out exactly as planned but some valuable insight can be observed nonetheless.
More on the topic:
Part 1: https://youtu.be/OEvkRW5vZNA
Part 2: https://youtu.be/nq-IhHbZdD0
Part 3: https://youtu.be/M_ab0Oz2ypI
Related videos:
Magnetic field shielding: https://youtu.be/2U1o66bs_Qg
Electric field shielding: https://youtu.be/Sxqa7N-fuHM
The flux band: https://youtu.be/Vx00iKkWC3w
Used datasheet: https://www.murata.com/en-global/products/productdetail?partno=GCM188R71H104KA57%23
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: https://www.patreon.com/feszelectronics")
![EMC tutorials - [1/3] Building an LISN](https://i.ytimg.com/vi/OEvkRW5vZNA/mqdefault.jpg "EMC tutorials - [1/3] Building an LISN
#114 In this video I look at the specifications and parameters behind a line impedance stabilization network, or LISN. I look at what is the purpose of the various components is and then take a closer look at how the values need to be chosen. Finally I build such a device.
More on the topic:
Part 1: https://youtu.be/OEvkRW5vZNA
Part 2: https://youtu.be/nq-IhHbZdD0
Part 3: https://youtu.be/M_ab0Oz2ypI
Datasheet:
https://ro.mouser.com/datasheet/2/445/7447707100-1901245.pdf
LISN schematic:
https://drive.google.com/file/d/16oYTyPU5FxeHJ_kNeXga7rXHTa_4HE9U/view?usp=sharing
Coil structure:
https://www.thingiverse.com/thing:4806829
Further reading:
https://www.tekbox.com/product/Pre-Compliance_Conducted_Emission_Measurements.pdf
https://www.ti.com/lit/wp/slyy136/slyy136.pdf
Special Thanks to all my supporters on Patreon! Especially @afiskon and Ralf B.!
If you liked this video be sure to check out my other videos and you can also subscribe to be up to date with all the new ones!
If you want to support the creation of more and better videos please consider checking out: https://www.patreon.com/feszelectronics")
