Conjugate Heat Transfer of an Inverter in Ansys Icepak AEDT

Conjugate Heat Transfer of an Inverter in Ansys Icepak AEDT Electronic Desktop starts with Icepak. Go to Modeler, Import, Open the Geometry, import material, and assign it to these three components, and we assign it to this component. Be sure that we have liquid cooling.

Invert all material selected here. Click OK. Assign material to the rest of the components, to all wire B material and all trace objects. We have more wire B, wire B, and also trace objects, more wire B, wire B. Assign material, assign copper to all of that.

Next, we go to Assign Material, AI Extruded Aluminium Extrusion, Aluminium excluded. We choose this. Next is all base plate objects. We assign copper to them. You see that copper. Next, we are going to all DC, Phase, and VR components. These ones will be copper, aluminiumistic. All copy MO Objects.

Save As. Say small and also important things like details or the material will be a graph, small, liquid, and will be assigned a molecule, molecule 50. Checking the materials, AIN materials, object scale for Aluminium oxide, old trace and wire B materials, and cooler for Aluminium extruded.

Copper will be assigned to base plates, copper aluminize for DC object phase and V objects, copper brass for all copper, molybdenum, DC, and whatever. That here you can see the objects engraph for TIM object, glycol for liquid, silicon typical for all diode RGBT, and the rest are for solenoid.

Next, we remove a region from the simulation, region, simulation, inside. We uncheck this one so it won't be included into the simulation. Assign power to diodes on module 1, Terminal block. We call it Diode Lower Lower 1. Now we will create this total power assigned to every of these diodes.

We will do it for diodes for module 2, and the total power is 100, and also for this diode, assign term on, call it diode lower. This is the name, and power will be 100 watts. So, in the third one here, you can check them. These are 100 watts. Next, module 2, 100 watts. And then module 3, 100 watts.

Then we assign power to RGBTs. Assign thermal block, call it IGBT power 1, now it is 80 watts. Now we assign the flow inlet condition, select this phase, go to terminal, opening, free, or you can call it flow inlet. Ambient temperature and ambient radial temperature already set.

Check mass flow rate, and the amount is 0. 13525. This is Inlet opening mode, I already assigned it. We can see that this is the Flow Inlet. So, I choose another side for Outlet. Now we are setting Flow Outlet.

Right-click, thermal, opening, filling, call it flow outlet, ambient temperature, ambient radiation temperature, we just go by the default, click OK. So, inlet, outlet. Create monitors to check the simulation progression for all the IGBTs, UIGBT.

For objects, we can assign monitor point and choose temperature. For outlet, we can assign monitor to the face for mass flow rate, OK. Check the power budget, the total should be 30 to 40 watts, and this is the itemized list for the power. Now, for Mesh, right-click, edit global region.

For face edit level, set it to 4. Come to Advanced tab, click User Specified, set the max element size to 8 in X, Y, Z, 8ml for minimum element in the gap, set it to 2, and for max level set it to 30. Click OK.

To assign a mesh region, click all objects that have power, right-click, and go to assign mesh region. Click OK. Go to Advanced, User check specified, Set X to 4, Y to 2, and Z to 4, so 4 to 4, Gap set it to 2, and Max level set it to 2, and select the X, Y, and Max size. Select OK.

You can check this mesh region here. You can see it. And these are the information we entered. We can add mesh refinement to some objects. Check all... Check all... or better at reading.

So, all YRP material objects, as well as face material, face object, face object, face object, Then DC plus and min. So, all Diot, IGBT, Wire, Phase, DC plus and DC min objects.

We choose all of them, right-click, Assign mesh operation, now change the name to VW_refinement, set name to tb, and max to 4, and this is for mesh operation. You can see. Mean 3, Max level of refinement 4. Go to analysis for solution setup.

Add solution setup, set the maximum iteration to 500, be sure that flow and temperature are included, check turbulence, and use k-omega SSD, check the sequential solution. Click OK. Go to Solver Settings, be sure that Turbulence Kinetic Energy is set to 0. This is important.

Open advanced options, and for under-relaxation, and also with discretization scheme for momentum and temperature, check second order. Click OK here, and be sure that kinetic energy for Turbulence set to 0. Save the project, right-click on the setup, and set generate mesh.

The mesh is generating, it takes maybe a few, a couple of minutes. So, the mesh is done, about 2.5-2.6 million cells. We can check like this item, see that what are the meshes on that, you can see that.

Let's check other objects like, for example, this one, you can see, this is IN, and if we check, for example, copper or base plates object, you can see. So, mesh quality, face alignment, volume, and skinness. So, back to mesh display. So, we have about 2.6-2.5 million cells. Is this not simulation?

I'll be back when the simulation is done. The solution is done, you can see that we have a good convergence when we get the rigid walls below the convergence setting, and these are stable magnitudes that reach the stable values.

These are the thermal monitors, and these are for mass flow rate fellow monitors. So, we are good for the solution. Let's go and check some of the results. Select the right-click, plot field, temperature, temperature, check surface only, and this is for temperature.

Click on it, will calculate the temperature on the surface, and it will show the contours. This is the contour of the temperature, and this is where the cold liquid came in, and after a little bit heating up, will be out.

And you see that the temperatures, okay, here you see the temperature maximum, it is up to 137. If we work with maybe better mesh, we can see that if it is different for getting that maximum temperature or not.

Let's check other results like go here in for the liquid and check pressure again, surface pressure, it is calculating the pressure. So, you see the pressure here, maximum it is 720, and if we just see the pressure, you can see that.

Or we can verify the application and verify it using very perfect application techniques as you want.

Check the summary of the results, you come here to the results, field summary, it could be for the boundary objects or monitors, we can check objects, on the surface of the objects or volume, we can check volume, and these are the quantities that we can export the results, say that for example temperature.

If we check some objects like Diodes and IGBT, say for example this one. If I want to choose more, maybe other Diodes and IGBT, you can add or subtract the output value to the output value. Then later we can add other objects if I want.

You can see here, for example, if I want to see the max temperature, see that what component, what object has the maximum temperature. 130 here for this object, DR2 lower, be sure that we consider all 130, 130 here for another diode, and this one, this is the maximum, 131. So, we can check the other statistics about that, Min, Max, Min, Max, Min value, Standard deviation, or whatever.

So, in this way, we can have a summary of that, and even we can save it as a template, or export it as a spreadsheet in Excel and save it. And later we can use it if we need it for the other calculation. Please contact us at https://ozeninc.com/contact for more information.