Sam M

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Sam M

Sam M

@samerps

Electronics Engineer, Scientist, and 3D Artist https://t.co/NA35wM06ET

UK Katılım Ağustos 2012
431 Takip Edilen9K Takipçiler
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Sam M
Sam M@samerps·
ElectroMag Nodes now available on BlenderMarket and Gumroad! Give it a go! I would appreciate any comments/feedback. Keep in mind that this is a first attempt at creating a basic electromagnetics solver in Blender, expect more features and nodes to be added blendermarket.com/products/elect… highvoltage.gumroad.com/l/electromagno… #geometrynodes #simulationnodes #b3d #blender3d #electromagnetics #engineers #engineering #electronics #science #physics #educational
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Sam M
Sam M@samerps·
@Jay966591328971 yes I'm using Coilcraft 2929SQ air core inductors to compare, inductance result is close enough within 10% the resistance calculation begins to diverge and become unstable at frequencies above 1MHz.
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Jay
Jay@Jay966591328971·
@samerps Has any of the data been cross referenced/checked to actual inductors for accuracy?
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Sam M
Sam M@samerps·
continuing with my PEEC solver in Blender for inductors. Now I have a basic Python/Numba code that can calculate skin and proximity. You can see as the frequency increases the current shifts towards to the outer surface and also gets affected by adjacent turns #b3d #geometrynodes #electronics #Technology #science
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Sam M
Sam M@samerps·
working on creating a PEEC (partial element equivalent circuit) solver, instant calculation of inductance. Geometry nodes are becoming more and more powerful. This will be included in Electromag Nodes. #b3d #geometrynodes #electronics #technology #Science
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Jay
Jay@Jay966591328971·
@samerps Pretty cool. Is/will this be a stand alone or only through that 3D engine?
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Sam M
Sam M@samerps·
@seekage_ solving Neumanns Integrals, also compared result with FastHenry
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seekage
seekage@seekage_·
@samerps This does not look accurate, are you using a lot of approximations?
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imaginary
imaginary@jaisoddj·
In the initial video, we see the effects of high frequency motion of electrical charges on electric and magnetic fields. Here, the particles is moving up and down at 1THz. The consequence is high derivatives of electric fields with respect to time, thereby generating proportionate magnetic fields whose fluctuations feedback into those electric fields. This is called back EMF. I ran it through a sim, and found something interesting. What happens when I lower the relative permeability of free space to 1e-7? We can see the effect in the video. As you can see, back emf is obsoleted! This is to be expected for two reasons. Absolute permeability multiplies by current density and changing E fields in maxwells equation for the curl of the resultant B field, from changing charge position and magnitude of charge, and changing electric field magnitude with respect to time. So, lower absolute permeabilities imply lower B curls, and lower B curls with respect to time, imply lower feedback into the electric fields. So, let it be known, to get rid of back EMF, all we need is an environment of low permeability, permittivity or both. In the image below, in the first example, I provide a current pointing away from the viewer(X circle) and the resultant B field. In the second example, I provide the same setup, except I add a mu Near zero (MNZ) meta material which effectuates a space with 0 permeability at the right frequency. We see the effect on the magnetic field here. The meta material pushes the magnetic field further away from the current. There is a second block, closer to the current. This may represent bismuth, or any material with lower permeability than the surrounding material, such as air. The meta material and bismuth make sure that the magnetic field pushes away, rather than closer to the current. Now, the change of this curl of this B field with respect to time is proportionate to the back EMF. Keep in mind, the B field is now, partially, further away. So, I end up reducing the back EMF, to the extent I move the B field away from the central current. Ideally, wide surface area meta materials, for maximum B field displacement, will lead to the greatest reduction in back EMF.
imaginary tweet media
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O!@O34760958·
@samerps Never thought Blender could calculate inductance...
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Kritischer Punkt
Kritischer Punkt@KritischerP·
@samerps You just popped up on my feed. The algorithm is getting better, but I lack some prior context. Does it compute coupling between arbitrary coil geometries? Will there be a GitHub repo? Cost? Patreon? I am compelled to
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Sam M
Sam M@samerps·
@Jay966591328971 for now air core, but will be including magnetic materials
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Jay
Jay@Jay966591328971·
@samerps Is this just for open core, or can this do others?
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Marc Compere
Marc Compere@Marc_Compere·
@samerps are magnetic fields included in this? there aren’t many B-field solvers and visualization tools 🤔
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Sam M
Sam M@samerps·
I finally made on it on the @TheAmpHour podcast! Many thanks to Chris Gammell for having me on podcast, please check it out if you want to learn about all things @Blender and how I use it for modelling and visualisations in engineering. @eevblog #b3d #blender3d #engineering #science #3dart #3danimations
The Amp Hour Podcast@TheAmpHour

Power engineer and 3D graphic artist @samerps's #blender visualizations have helped many people understand how RF and magnetics acts in a variety of circuits. He talks about how to get started in Blender and the variety of tools available once you do. theamphour.com/695-making-the…

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Sam M
Sam M@samerps·
Kicad can export layout and individual nets as STL files, which can then be imported in #b3d with the new Import STL node. You can either import the entire geometry or selected specific nets by typing their name. The imported geometry can then be scaled up to view a net of interest in more details like this pcb planar transformer design #geometrynodes #electronics #Engineering #3dart #3DModel #kicad
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Sam M
Sam M@samerps·
I'm experimenting with the new features in both #kicad and Blender for exporting and importing geometry. KiCAD now allows you to filter and export selected nets from the PCB as STL or STEP files, and Blender now has new import STL nodes in geometry nodes, which means you can select the nets that you want to visualise with having to import the entire geometry. #b3d #geometrynodes #electronics #Engineering
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Nurhaida
Nurhaida@xenosagaX2·
@samerps Thanks! Looking forward to it💪
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Sam M
Sam M@samerps·
simulating layouts with Blender FastHenry! you can now export spice netlist of your Blender scene and run a layout spice simulation. Here I am using kiCAD Ngspice to see study the switch node voltage ringing of NMOS half-bridge with TO-220 packages. You can see how moving DC link capacitors closer, and shortening leads reduces the amount of ringing and overshoot. @Blender @kicad_pcb @DanielBogdanoff @eevblog
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Sam M
Sam M@samerps·
@xenosagaX2 Hi, thanks for testing, the demo file is out of date, I will create a new one and upload it soon
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Nurhaida
Nurhaida@xenosagaX2·
@samerps Hey Sam! Nice video and great enhancement. I tried running one of the demo file included in your repo but when I tried to 'Run All' following the sample video mentioned in github, I experienced a unique id error not found? I'm running on Blender 4.4.1. What's causing this?
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