Electric Motor Noise using ANSYS - Part 3
Hi everybody, this is the final video in a three-part series on how to solve electric motor noise using ANSYS. In this video, I'll demonstrate how to solve the harmonic response using the solutions obtained from the Maxwell and modal simulations conducted in the first two videos.
Updating Maxwell Solution
- Since we modified the Maxwell solution slightly, we need to update it. To do this, right-click on Solution and click Update.
Working in Mechanical
- Once the Maxwell solution is updated, we can start working in Mechanical.
- If you see green arrows in the setup block, right-click on Setup and hit Refresh.
- If there's a question mark next to the setup block, you can skip this step and move on.
- After refreshing, double-click on Setup to open Mechanical.
Importing Remote Loads
- Under Harmonic Response, you'll see imported remote loads.
- Import these loads onto the stator teeth by changing the Scoping Method to Name Selection and selecting Tips, the name selection created on the faces of all those teeth.
- Right-click on Imported Remote Loads and select Generate Remote Loads.
Analysis Settings
- Click on Analysis Settings to view the settings imported from Maxwell with the remote load.
- You can modify these settings if needed, but I will leave them as set up in Maxwell.
Creating a Waterfall Diagram
- Right-click on Solution, go to Insert, then select Frequency Response and ERP Level Waterfall Diagram.
- Scope the geometry to all surfaces on the exterior part of the motor.
- Select the outer body, hide all other bodies, and press Control + A to select all faces on this body.
- Hold Control and deselect faces you don't want to include, such as the three bolt holes and two other faces.
- Click Apply on geometry selection.
Solving Harmonic Response
- Right-click on Solutions and hit Solve.
- Once the solution is complete, review the waterfall diagram.
- Adjust the bands to extract more useful information, identifying areas where most noise is created and the frequency of that noise based on motor speed.
Analyzing Deformation
- Right-click on Solution, go to Insert, and select Deformation.
- Create two deformation plots: one for the x-axis (radial deformation) and another for the y-axis (tangential deformation).
- Change the coordinate system from global to the cylindrical coordinate system created earlier.
- Define the plots by set number, such as set number five, and direct form.
- Right-click and select Evaluate All Results to view deformations in both directions.
Conclusion
That's it for this video series on simulating electric motor noise using ANSYS. If you have any questions, feel free to ask them in the comments section below. If you found this video useful, check out our YouTube channel for more ANSYS tutorials.
About Ozen Engineering
This video is brought to you by Ozen Engineering, an ANSYS Elite Channel Partner. We use physics-based simulation to solve multidisciplinary engineering problems, specializing in FEA, CFD, and high and low-frequency electromagnetics.
For more information, you can email us at info@ozeninc.com, call us at our office phone number, or visit our website at www.ozeninc.com.
Hi everyone, this is the final video in a three-part series on solving electric motor noise using ANSYS. In this video, I will show you how to solve the harmonic response using the solutions gained from the Maxwell and modal simulations from the first two videos.
First, since we changed the Maxwell solution a bit, we need to update it. To do this, right-click on "Solution" and select "Update." Once the Maxwell solution finishes updating, we can start working in Mechanical.
If you see green arrows in the "Setup" block, right-click it and select "Refresh." If you only see a question mark, you can move on. Once the "Setup" block finishes refreshing, double-click on it and open Mechanical. Under "Harmonic Response," you'll see imported remote loads.
Import these loads onto the stator teeth by selecting the "Scoping Method," changing it to "Name Selection," and then selecting "Tips," the name selection we created on the faces of all the teeth.
Once that's done, right-click on "Imported Remote Loads" and select "Generate Remote Loads." If you click on "Analysis Settings," you'll see all the settings brought in from Maxwell with the imported load. You can change these settings if you'd like, but I'll leave them as we set them up in Maxwell.
Next, create a waterfall diagram. To do this, right-click on "Solution," go to "Insert," select "Frequency Response," and then choose "ERP Level Waterfall Diagram." Scope this to all the surfaces on the exterior part of our motor.
Select the outer body, hide all other bodies, and then select all the faces on this body. Deselect any faces you don't want in the waterfall diagram.
Once that's done, click "Apply" on "Geometry Selection," and the harmonic response is all set up, so you can solve it by right-clicking on "Solutions" and selecting "Solve." Once the solution finishes solving, you can look at the waterfall diagram and change the bands to get more useful information.
Use this waterfall diagram to look at the areas where most noise is being created and the frequency of that noise based on the motor speed. In addition to the waterfall diagram, you can also use the map to see the modes of the water and the bands created.
To do this, go to the map and scroll down to the water. You can also look at the deformation of the motor at different frequencies. To do this, right-click on "Insert" or "Solution," go to "Insert Deformation," and then create two different deformation plots.
This will show you the x-axis, which will be the radial deformation, and the y-axis, which will show you the tangential deformation. That's it for this video series on the deformation of the motor. If you have any questions, feel free to ask them in the comments section below.
If you enjoyed this video and found it useful, check out our YouTube channel for other ANSYS tutorials. This video is brought to you by Ozen Engineering and ANSYS Elite Channel Partner. We use physics-based simulation to solve multidisciplinary engineering problems.
We specialize in FEA, CFD, and high and low-frequency electromagnetics. For more information, you can email us at [info@ozeninc.com](mailto:info@ozeninc.com), call us at our office phone number, or visit our website at [www.ozaninc.com](http://www.ozaninc.com).
