NVH Analysis in Motor-CAD
Introduction
Hello everyone, this is Daniel Esmaili. On behalf of Ozen Engineering, Inc., today I'm going to talk about NVH analysis in Motor-CAD. In this presentation, we will demonstrate how to carry out predictions of electromagnetically excited noise and vibration, known as e-NVH, for a brushless permanent machine previously shown for an e-bike. This is the third video in the Motor-CAD series, and we plan to produce more videos in the near future.
Company Overview
Before we start the simulation, a brief word about our company: we are located in the Bay Area, in the northern part of California. We sell ANSYS products, provide customer support, and manage traction for machines.
Simulation Overview
In a previous video, we discussed the thermal aspects of Motor-CAD and created related plots. Today, we will focus on the NVH analysis. We will use the model created for the e-bike, but you can choose different models by going to File > Open Template and selecting a different machine, such as BPM or IPM.
Steps for NVH Analysis
- Open the file for the e-bike model.
- Ensure the motor type is set to BPM model.
- Switch to the mechanical settings for NVH analysis.
- Review the slot number and pole number (Slot Number: 18, Pole Number: 4).
For a detailed review, please refer to our previous videos. You can pause the video to review settings before proceeding.
Simulation Details
The approach for this simulation is based on calculating the vibration response of the stator to radial forces, which are determined using the Maxwell stress tensor simulation. These forces are calculated around the stator at each time step as the rotor rotates.
Key Components
- Force Calculation
- Acoustic Model
We will explore these components in different tabs during the simulation. The expected vibration and acoustic response is derived from these forces.
Conclusion
Thank you for watching. Stay tuned for more videos in the Motor-CAD series.
Title: Part 1-A-BLDC Simulation with Motor-CAD: Simulating E-Bike Motor E-NVH. Noise Vibration Harshness Hello everyone, this is Daniel Esmaili from Ozen Engineering Incorporated. Today, I will talk about NVH analysis in Motor-CAD.
In this presentation, we will show how to carry out predictions of electromagnetically excited noise and vibration, known as e-NVH, for a brushless permanent magnet machine, specifically for an e-box.
This is the third video of the Motor-CAD race, and we will make more videos in the near future for Motor-CAD. Please note that the method described in this tutorial can also be used for synchronous and SRM machines.
Before I start the simulation and show you how to use the software, here's a little about our company: We are located in the Bay Area, North of California, and we sell ANSYS products and provide customer support for them.
We also do traction management for machines, even if they are in Seoul or the Bay Area. In a local video, we talked about the Motor-CAD thermal aspect and created these plots. Now, let's open Motor-CAD. I will pull up the model used for the e-bike.
If you want to have other models, feel free to go to File, then Open Template, and choose a different machine. For today, I will choose the file we created for the e-bike. We open the file and check that we are on the Motor Type BPM model. We did the thermal last time, and today we will use NBS.
We need to choose Mechanical, and the interface will change. In the previous video, we reviewed the slot number (18) and the pole number (4). Here, you can see a little more detail. I won't go into details, but feel free to check the previous videos or pause this one to look at the settings.
As a result, we have a very raw readout. Now, let's start with a short description. For example: Model D1, Model D2, Model D3, Model, Model, Model, Model, Model, Model, Model, Model. Some settings and the material database. Here is the calculation tab that we will use in a couple of minutes.
Coming back to the Input Data and Settings parts, we will use this tab here. As you can see, we have the Force Calculation for the Acoustic Model. I'll switch to these different tabs so you can see them as I talk.
The approach for this simulation is based on calculating the vibration response of the stator to the radial forces, which are calculated based on the Maxwell stress tensor. The forces are calculated around the stator at each time step as the rotor rotates. We'll see the time step here.
From these forces, we expect to see the vibration and acoustic response.
