Solving DC and AC Inductance in Ansys Q3D

Hello everyone, this is Aded from OZ Engineering and in this video I'll show you how to solve for DC and AC inductance in Ansys Q3D. Let's consider this very simple geometry where we have two groups of cables.

Let's assume this is positive and this is negative and we want our signal to go from this side of the positive and come back from here. So we will assign our sources and sinks accordingly. This side will be sources, sinks, sources and sinks.

Here the first thing to do is to go to Nets, right click on it and select Auto Identify Nets. Here under Nets we can see now all our nets. And then we can go to the next step. Now let's assign our sources and sinks. First, let's switch to the Select Face mode.

We can do that by clicking on the F key on the keyboard and selecting Face. So I'll select the first one, right click, go to Assigning Excitation and select Source. Then click OK. On the other side of the cable we will do the same. And with a beta6 and alpha0, the same operation.

Let's select the face, right click, assign excitation. The sign will select sync and click OK. Now we will do the same with the other cables. For the second group of cables, we will assign the source here, right click, assign excitation, source, OK, and we will assign the sync here.

Then we will do the same with the other cables. Let's go back to the previous group of cables. Now if we go here in the Project Manager and expand the Nets, we can see the sources and sinks. Now the next step is to do the same with the first group of cables.

Now we will go to Reduce Matrix, we want these four in parallel, these four in parallel, and then connect them in series. So if I right click on Reduce Matrix, I can go to Join in Parallel.

And select the sources of the first group of cables, so I will select source 1, source 2, 3, and 4. Click Save and Create. And then I will select the sources from the second group of cables. And then I will select the sources from the second group of cables. And here I will click Save and Close.

Let's rename this parallel. And I will make a copy of it. Right click here, and click Duplicate. And I will rename this one series. And here I will rename this one series. In this one, I will right click on it. And I will go to Join in Series.

And connect sync 1 to source 5. And click Save and Close. We can go here and clear this error message. And the next step is to create a Solution Setup, which I already did. Here I solved this model at 10 MHz. For the Solution Selection, we need DC and AC. And here I have a Frequency Sweep.

From 0 to 1 kHz, 101 points, the Linear Count. And from 1 kHz to 40 kHz, 40 samples. That's the Log Scale. Now let's go to the Design Name. Right click on it. And click Analyze. And click Analyze All to solve the model. Once the model is solved, we can go over the results.

But first, let's check the mesh. So I select the cables. Right click. And click Plot Mesh. Right click Done. And as you can see, we have good mesh. Now let's go and look at the inductance results. So I right click on Results. And click Solution Data.

Here at 0 Hz, we have the DC inductance for the individual cables. To view the self terms, we can click here. And to display the AC inductance, we just change the frequency. I'll select 40 kHz. And this is the AC inductance for the individual cables. We can also plot the results.

So I right click on Results. Create Matrix Report. Here I'll change the matrix and select parallel. And I'll plot the DC solution for the partial inductance of each group of cables. Here I'll make a new report where I select AC. And I'll plot the self inductance of each group of cables.

And I'll plot the self inductance of each group of cables. Here we can use logarithmic scale. So I can go to X scaling and change it to log. Click apply. And OK. And here's the DC solution. Now let's plot the DC solution for series inductance of all cables. I change this to series.

And here we click new report. Let's also plot the AC solution. So I select it and click new report. Here we can use log scale. And here's our DC solution for the series inductance. Now let's plot the fields. So I double click on the design name. And here let's hide the mesh.

So right click on mesh and click plot visibility. So right click on mesh and click plot visibility. Here with the select face mode I'll select all the cables. Right click. And click DCRL fields. And here we'll plot the current distribution. Here let's click done.

Here it looks like we are exciting only one cable. So let's go to field overlays. Right click there. And click edit sources. Let's select the DCRL tab. And here we can change the value for all sources. Let's check here it is only 4 MB.

Okay then it Gördöner Mandal as well as what we have selected can be added to the loops. Let's create the output form. Now it will 변 cosine meter. So drag it to the left. Also this is 12 empathy force square. And drives us back to the vote option. So let's drag it.

Bend Folove and press Enter to change. The outputters Zeidner and Kl astronomical start ГiGarrDootering here. And here we can move this via the loop ID and DB. Which helps to launched these loopocovers. And here we can also change the data from the W집ähik configuration to the top data.

So you can change these into this. It's bucked for here. Now, let's select all the cables, right click, go to ACRL fields and let's plot the current distribution. Here, let's click done.

Same as before, to edit sources, let's go to field overlays, right click on it, go to edit sources and select the ACRL tab. Here we can change the value for all sources. And let's click OK. The plot updates automatically.

In this video, we saw how to solve for both DC and AC inductance using Ansys Q3D. Thanks for watching and see you in the next video.