Hello everyone

I am doing research on demagnetization effect of permanent magnet synchronous motor but i am suffering error. First i excite object based demagnetization(permanent magnet mounted on rotor) in first design(i.e. source design) When i link one design(magneto-static) to another design(magneto-static) using setup link in analysis tab it occur an error. I am attaching screenshot.

I am performing a PMSM simulation with AEDT. I have created an Rmxprt design and analyzed showing copper losses as 277 Watts. After that, I have generated a Maxwell3D design from Rmxprt. I have simulated design with normal setup, and losses are way too high (in KW range, about 12KW), namely stranded losses only

To minimize these stranded losses, I have selected a solid wire in phases. now I am getting a high solid loss. I kept the resistance of a wire as per the manufacturer manual i.e. 0.007 ohms. My main purpose is to couple Maxwell and fluent. and I can't map these high losses which yield inaccurate results.

How do I get losses as per Rmxprt, which is an analytical tool and it must be right?

Why stranded losses are too high?

How do I eliminate them from simulation?

Please comment on litz wire modelling, if it is helpful here.

Thanks for your support.

Yogesh

]]>Also, after almost an hour I am getting another error (attached in picture 2).

What steps should be done regarding these errors?

]]>I need to help about generating mesh in Maxwell 3D. I created a Maxwell 3D model from RMxprt, when i tried to generate mesh, "surface mesh on the facets is invalid" error occurs. I rigth clicked the error and opened "go to reference" window. Invalid faces of model are shown, but how can i fix the problem. What kind of an action do i have to do ? I created full geometry of the motor, but then analysis stoped due to CPU intensive processing.

Best Regards.

I watched both parts on youtube namely "Thermal Analysis of Induction Motor Using Maxwell & Fluent" and I have a question about copper losses.

I tried to simulate a motor with the same specification and I obtained losses in the range of KW because of stranded loss. for that many losses, I am getting the temperature in the range of 2000K inside fluent when I map those losses on copper winding. Inside the second part of the video series. I noticed that copper winding phases had a manual entry of source term as 392000 W/m3.

I feel the reason being Maxwell had 2D analysis and phases were 3D inside fluent for manual adding source term but it is still unclear to me how does this value be determined from maxwell.

So, for the applying source term inside fluent, how does this value is determined from maxwell even though losses inside copper winding are much larger?

Please explain the procedure for calculating this value for the source term.

Thanks in advance.

]]>Recently I've been struggling with this issue where some components I have a power specified in Icepak are negative. The left column is the power is specified and the right is the calculated one by the solver. Anyone have experienced anything like this? Where would be a good place to start debugging?

Any help would be greatly appreciated.

Some screenshots of my Convergence plot and monitoring points of my model:

(1) In HFSS 3D project, dipole A is stimulated with a voltage source (Lumped Port excitation), and dipole B is loaded with a 50 Ohm resistor (lumped RLC). Now the question comes up. If I want to replace the 50 Ohm resistor with a **subcircuit**. How could I define the circuit? Specifically, if I want to include nonlinear elements, such as varactor or PN junction diodes, how could I import the **SPICE netlist**? Or if I understand correctly, it is currently not available.

(2) Suppose (1) can be solved, now replace the port excitation with **an incident wave**, and set both dipole A and dipole B as receiving antennas with 50 Ohm resistors at the feeding points. Is it still possible to perform transient full-wave EM/circuit simulation in HFSS?

As far as I know, Ansys provide the co-simulation by dynamic link HFSS into circuit simulation. However, the interaction between HFSS and the circuit is based on a spice like equivalent multiport network, which is called a standard EM/circuit co-simulation. This means HFSS project should be launched before the circuit simulation. A true transient EM/circuit co-simulation would be by carrying out both the field simulation and circuit simulation simultaneously. The interactions or data exchanging between field and circuit parts are conduced at each time step. Unfortunately, this is not well documented in the HFSS help documents. Can any one give me some comments or hints about the above two questions?

Personally speaking, a true transient EM/circuit co-simulation might not be efficient but could be very advanced for nonlinearly loaded RF designs. I am looking forward to the answer. Thanks.

]]>Recently, I have read some articles about PN junction, one of them (data source: Analysis in PN Junction Diode) impressed me deeply and had such doubts What is the concept behind diffusion capacitance and on resistance of the diode? Can we consider diffusion capacitance as a parallel plate capacitor ? It is easier to see the depletion capacitance and its calculation but diffusion capacitance calculation is very confusing ? Does the on resistance comes from carrier scattering?

Is there anyone give me some ideas? Many thanks.

]]>I try to simulate the characteristic impedance of a Si dielectric waveguide (Thickness x Width: 500um x 300 um) with wave ports.

- Ports were set to Zwave and "Do Not Renormalize"
- Port Zo(1,1) is supposed to be the characteristic impedance of the dielectric waveguide

The result plotted is really weird. This simulation was done in HFSS 2020 R2 and 2021 R1. Any suggestions to figure out this problem? Thank you.

]]>Nowadays i am working on the analysis of attraction force between 2 permanent magnets.

Structure is simple and consists only 2 permanent magnets in air with same direction magnetization.

My first thought is to check the results in 2D FEM and analytically.

The results i met in 2D and the analytical calculations by hand are both similar so no doubt.

Also the result by field calculator by taking line integral of Edge Force Density over the magnet and multiply with depth also give right solution.

But i have problem to calculate Edge and Surface Force Density by field calculator.

I make the calculations in field calculator based the equation on the picture1 but results are so different .

Then i tried to make calculation based on as in picture2 but no success.

Can you pls share your kind experience how to calculate Edge and Surface Force Density by field calculator in 2D for reluctance type forces as in attraction force between permanent magnets.

Regards,

Sami

]]>I wish to build a vector controlled VFD in ANSYS Simplorer and make it drive a 3-Ph PMSM motor modeled in MAXWELL.

I could find links to some research papers where this has been achieved:

https://iopscience.iop.org/article/10.1088/1757-899X/872/1/012047/pdf

https://core.ac.uk/download/pdf/188803398.pdf

I have my 3-Ph PMSM motor model ready in MAXWELL.

However, I am still trying to learn how to model a VFD in Simplorer and co-simulate that with MAXWELL.

Since I am just a beginner in this area, can somebody please let me know of some documentation or links wherein we can learn step-by-step procedure to model a VFD and and its co-simulation with MAXWELL ?

]]>I made a PMSM model and implemented applied load torque = -3Nm. Negative sign has been applied as per following discussion: https://forum.ansys.com/discussion/12664/electromagnetic-torque-vs-load-load-torque-in-ansys-maxwell

The PWM model for VFD has been referred from the inbuilt example as per discussion here: https://forum.ansys.com/discussion/26927/co-simulate-ansys-simplorer-and-ansys-maxwell-for-3-ph-pmsm-motor#latest

The expected value graph of Transient torque produced by the motor should have been +3Nm. However, the value that I see is -0.25Nm as shown below:

Apart from that, I could also observe that, no matter what the value of load torque is, Transient torque is always showing up -0.25 Nm.

Can somebody please let me know how do I ensure that Transient torque = -Applied load torque ?

]]>I am trying to simulate the following Simplorer-Maxwell cosimulation inbuilt example "assm-1_PWM_TwinBuilder" available in Electronics desktop.

The in-built example looks as such:

The default settings of transient analysis is as such

However, I wish to increase the time-step to Hmin= 400 us. On doing so, I am getting multiple simulation errors, one of which reads as such:** Too many digital iterations without time advancing **

Can somebody please let me know, how do I carry out the cosimulation with increased time step ?

]]>I wish to a make a saturation block which will be analogous to the block available here: https://in.mathworks.com/help/simulink/slref/saturation.html

Can somebody please let me know how do we do this in Ansys Simplorer ?

]]>https://forum.ansys.com/discussion/comment/116990#Comment_116990

I have posted a question here and added another comment to further explain the question. Apparently, comment on the question seems to mark the question as answered on the forum. So, my guess is that everyone sees this question answered and nobody came forward to answer.

With this post, I want to ask for an answer to the question, please.

Thanks in advance

Regards,

Yogesh.

]]>I am trying to run a simulation on the University HPC which I have access to.

The HPC admin suggested that I use Batch mode since the GUI is taking too much time.

after loading the files to the HPC and running the workbench in Batch mode, this is what I got:

But I don't know how to proceed further to run the simulation and get the results.

The simulation consists of a Maxwell 3D model and a Steady State Thermal model as shown in the screenshot below

Kindly advise on how to proceed with the commands.

]]>I have exported the machine model from RMXPRT and it ran well.

The only thing I modified after that is that I made the copper conductors thinner by 2 mm.

not the model is not running and it is showing the below error:

the image below shows the machine with thinner conductors

and below is the mesh operations list:

I tried to make the SurfApprox_Coil finer and I tried reducing the Length_coil to a Max length of 1 mm (It was 22mm with the previous model generated by RMXprt) but still I am getting the same errors

]]>I was able to perform the same task in 2D but I can't find a way to do it in 3d.

please help !

Is it possible to use the Machine Toolkit without access to Ansys HPC ?

]]>In the following figures I am displaying a flaw as well as all the options used for exporting the file to Q3D? The PCB was designed using Altium and imported into SIWAVE using "Import ODB++" option.

I am working on a project where I use HFSS and MATLAB programs together. Basically, I recorded as script everything I did on HFSS and transferred them to MATLAB, so that I can do mathematical calculations and data evaluations easier. The problem is there is a sphere in my HFSS design, and I need to change its radius in order to observe the effect, and when I recorded this script I got something like this;

oEditor.ChangeProperty(["NAME:AllTabs",["NAME:Geometry3DCmdTab",["NAME:PropServers", "Sphere1:CreateSphere:1"],["NAME:ChangedProps",["NAME:Radius","Value:=", "15nm" ]]]])

As I stated above, I transferred this to MATLAB, and ran the code from there and I wanted to observe this effect for various radius values. However, I get the same problem over and over again which is

Script macro error: Script Error (Code 800a0408) in file: C:/Users/yigit/Masaüstü/transmissionReflection/extract.vbs Description Invalid character Line(16): "oEditor.ChangeProperty(["NAME:AllTabs",["NAME:Geometry3DCmdTab",["NAME:PropServers", "Sphere1:CreateSphere:1"],["NAME:ChangedProps",["NAME:Radius","Value:=", "15nm" ]]]])" Cause: MicrosoftVBScript compilation error

After some online research I checked the box on Tools->Options->General Options->3D Modeler-> Edit properties of new primitives but nothing has changed. Similar problem has occured to me when I wanted to do "EditSetup" for analyzing purposes, however I solved the problem by creating new setups for different frequencies. In this case I do not have that kind of chance so I am desperate for any help.

Thank You

]]>Thank you very much in advance

I wish to build a vector controlled VFD in ANSYS Simplorer and make it drive a 3-Ph PMSM motor modeled in ANSYS MAXWELL.

I could find links to some research papers where this has been achieved:

https://iopscience.iop.org/article/10.1088/1757-899X/872/1/012047/pdf

https://core.ac.uk/download/pdf/188803398.pdf

I have my 3-Ph PMSM motor model ready in ANSYS MAXWELL.

However, I am still trying to learn how to model a vector controlled VFD in Simplorer and co-simulate that with MAXWELL.

Since I am just a beginner in this area, can somebody please let me know of some documentation or links wherein we can learn step-by-step procedure to model a VFD and and its co-simulation with MAXWELL ?

]]>The new 2020 R1 version contains two types of analysis setup options. First one is Auto, second is Advanced.

Advance option is similar to the previous version. But can anyone suggest how does the Auto option work? It doesn't take any solution frequency, then what is the difference between the Auto frequency sweep (without any specific solution frequency) and Advanced frequency sweep (which is setup under a specific solution frequency)?

Thanks.

]]>The input settings are as follows.

How to check if the input value is coming into the waveguide correctly?

I tried like that below ( field calculator ), but the input value is 0.9w not 1w.

is it correct? or 0.1w is loss?

]]>I am having indication regarding material not present in ansys library but regardless of it i customize material. i saved material properties. I want to ask is it effect solution ? if yes how to overcome it ? how can i add it as permanent material in ansys library.

I am getting the following error for a simulation. Can anyone suggest why is this happening?

process hf3d error: Matrix solver exception: file I/O failure. Please contact ANSYS technical support

]]>I developed this wireless power transfer system that supplies 5.28V with a very high supply impedance (32kΩ).

I really want to make it work, so I thought of using a step-down voltage regulator, since it will release a lower voltage at a higher current. The problem is that I can't seem to find any voltage regulator that is rated at a very low voltage.

Do anyone know a switching step down voltage regulator for Vout=2V where Vin=4 to 8V?

]]>while building a Maxwell model from an Rmxprt auto-assigned slot fill factor of around 8000% and after running maxwell design I received an error such as FE matrix could not be solved possible reason being unknown error or poor problem setup. does by any means this excess fill factor is causing error or not? Thanks in advance

Yogesh

]]>while analyzing the motor inside Maxwell, stranded losses are in the range of 5kw. The reason for this being Rmxprt assigned a high winding slot fill factor around few thousand times.

how do I clear this high stranded factor assigned by Rmxprt resulting in high losses?

what would be other changes in design after adjusting this stranded factor?

Thanks in advance

Yogesh

]]>What do the numbers under the progress bar mean?

]]>I am relatively new to APDL , and I am trying to calculate the torque on a cylindrical rod inside a uniform magnetic field. I am using the magnetic scalar potential method (MSP) with SOLID96 elements. I can solve the solution, however I would like to extract the forces acting on the body and use them to calculate the total toque about the COM of the body. First I use FMAGBC on all the rod elements. In post processing I do this to calculate the x,y, and z components of the torque Tx, Ty, and Tz.

\POST1

FMAGSUM, ! Summarize the magnetic elemental forces

PRETAB,FMX_X

CMSEL,S,rod_volume ! Select the rod volume

VSUM, ! Calculate geometry statistics of rod

*GET,Xc,VOLU,,CENT,X ! X, Y, and Z components of centroid of rod

*GET,Yc,VOLU,,CENT,Y

*GET,Zc,VOLU,,CENT,Z

CMSEL,S,rod_elements ! Select the rod elements

*GET,nrelements,ELEM,,COUNT ! Number of elements in the rod

selected_element = 0 ! Counter for selected element numbers

*Do,i,1,nrelements ! Iterate number of selected elements

elenum = ELNEXT(selected_element) ! Get the next selected element greater than current selected_node value

forceX = FMX_X(elenum) ! Magnetic force for this element

forceY = FMX_Y(elenum)

forceZ = FMX_Z(elenum)

rx = CENTRX(elenum) ! Store the realtive coordinates to the CoM

ry = CENTRY(elenum)

rz = CENTRZ(elenum)

Tx = Tx + (ry*forceZ - rz*forceY)

Ty = Ty - (rx*forceZ - rz*forceX)

Tz = Tz + (rx*forceY - ry*forceX)

selected_element = elenum ! Set the current node to the just selected one

*Enddo

FINISH

This does not produce the desired results, there are two issues. Xc, Yc, and Zc, the centroid of the body are not retreived. Second I get an error saying FMX_X doesn't have dimensions defined. The calculation does not work. Am I using the FMAGSUM and VSUM functions correctly? My understanding is that FMAGSUM creates the tables FMX_X etc. Am a indexing the tables correctly in the loop?

Any help would be appreciated,

Mark

]]>how can I set different time steps for different time intervals in the analysis setup.

I remember from the training that there was a conditional equation where I can specify that if time is in a certain range, the time step can have a specific value.

To be more specific and clear:

I want the time step to be 0.01 for the first 0.1 seconds and then I want it to change to 0.001 when the simulation time is between 0.1 and 0.3 and then 0.0001 when the time is between 0.3 and 0.35 seconds.

Thank you

]]>More Detail: I am simulating a dielectric lens in HFSS. Using SBR+ ray tracing, the rays seem to be entirely reflected off the surface of the lens – and all interfaces between transparent materials for that matter. I am using default material definitions provided by Ansys for the Teflon Lens and Air box. In our mm-wavelength range, Teflon should be relatively transparent.

Question: How do I use SBR+ ray tracing to simulate how the lens directs the light waves? What settings should I change so that the rays pass through object interfaces instead of being entirely reflected?

Thank you

]]>