December 16, 2019 at 4:51 pmSun1234Subscriber
Dear all, I have designed a synchronous generator using rmxprt and from that I created a Maxwell 2D model...I performed transient analysis ....I used an external circuit created in Maxwell circuit editor...when I ran the generator at a time step of 0.002 sec for a duration of 2 seconds I got a nice sine wave...when I reduced the time step to 0.0001 sec for the same 2 second duration...I got a sine wave with wiggles... (high frequency sine wave superimposed on the actual sinewave)...I wanted a smooth sinewave. .can any one resolve this issue.. thanks in advance....
January 11, 2020 at 6:57 am
January 30, 2020 at 12:49 pmPaul LarsenAnsys Employee
Hello. Your question is difficult to diagnose without further information. It looks like a ripple that is either due to a physical cogging process (does this match with the number of teeth?), or there could be a discretization error that is amplified by the model. The two main types of discretization in these transient simulations are time-discretization and mesh-discretization (compounded with the nonlinear solution process). Because you are using smaller time-steps, I don't think there is any time-discretization problem. I would investigate the mesh and the nonlinear residual (and BH curves). Particularly, I would look at the Band object meshing and use very small segments as a test case (maybe every 1deg in 2D, or every 5deg in 3D). If the ripples change with that Band segmentation, then you can see what value is acceptable. Same with the nonlinear residual, try using a very small value to see if it changes the result (maybe 1e-12 in one case), and then you can see what value is acceptable. When you do the nonlinear residual test, make sure there are enough mesh elements to capture the nonlinear gradients in the magnetic cores.
September 3, 2020 at 6:41 amhameedSubscriberHy nI am working to simulate the axial flux permanent magnet machine i have design all the parameters of model and analyze the setup but the results are not according to standard i need pure sine wave having value in volts (5 to 10V)n with 90 degree phase shift in the induced voltage attaced figure has shape near to sine but value in mV i have set the mesh is ansoft classic and small analysis setup when i increase the setup size distortion in waves occurs. i have get flux linkage waves are accurate but the induced voltage have ripplesnFigure are attached nPlease guidenThanks ?n
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- simulation completed with execution error on server
- Maxwell, HFSS or Q3D?
- How to export Ansys Maxwell simulation results for post-processing in matlab or in .csv file
- Unable to assign correctly the excitations in a coil
- Running ANSYS HFSS on the HPC (it runs on Linux only)
- Running ANSYS HFSS on multiple nodes on SLURM based cluster
- Intersect errors with model with complex structure
- HFSS: reset marker legend dimensions.
- Process ‘3dtds’ terminated abnormally
© 2023 Copyright ANSYS, Inc. All rights reserved.