Ansys Maxwell Core Loss Calculation
Hello everyone, David Giglio here with Ozen Engineering, Inc. In this video, I will show you how to use Ansys Maxwell to calculate the core loss of a laminated core and compare the results with the manufacturer's specification sheet.
Model Overview
In this model, we have a water inductor with excitation current flowing out of an inner cross-section of the winding. The current flows upward and circulates around, as shown by the current density vectors. This produces a field in a counterclockwise, circumferential direction in the coordinate system.
Excitation and Magnetic Field Calculation
Our goal is to produce a magnetic field (B field) of 1.7 Tesla according to the manufacturer's data sheet for case steel. We apply a frequency of 60 Hertz and use the typical core loss and lamination factor. Based on the magnetizing curve from the manufacturer's sheet, we know the required H value for 1.7 Tesla.
- Using the H value and the mean length of the toroidal core, we calculate the required current.
- We apply excitation and the H value from the magnetizing curve to obtain 1.7 Tesla.
Results
The maximum magnetic field achieved is 1.6956 Tesla, and the average is about 1.67 Tesla, which is very close to the manufacturer's specification.
Core Loss
- The core loss in steady state is 1.10 Watts per kilogram.
- The manufacturer's specification states approximately 1.08 Watts per kilogram.
Our calculations show only a few percent difference from the manufacturer's data sheet.
Magnetizing Curve Comparison
We also compare the magnetizing curve (B vs. H):
- The green curve represents the manufacturer's data sheet.
- The red dot represents a point in the laminated core model, showing a few percent difference.
If a solid core were used instead of a laminated core, the results would align exactly with the manufacturer's magnetizing curve.
Data Import and Configuration
We used a sheet scan tool to import the data sheet, extracting the magnetizing curve and the B vs. P (flux density vs. power loss) data. Here's how the settings were configured:
- Stacking factor: 0.966 (96.6%)
- Stacked in the Z direction (dimension 3)
- Nonlinear BP curve from the manufacturer's specification sheet
- Lamination thickness: 0.23 mm
Conclusion
This is how we calculate the core loss using Ansys Maxwell for a laminated core and verify the results against the manufacturer's specification sheet to ensure accuracy.
Contact Us
If you have any questions, please contact us to learn about our simulation capabilities and request a demonstration. Ozen Engineering, Inc. is an ANSYS Elite channel partner. We provide training for ANSYS tools, consulting services, and sell ANSYS software packages.
Thank you and take care!
Hello everyone, David Giglio here with Zolz in Engineering. In this video, I will show you how to use Ansys Maxwell to calculate the core loss of a laminated core and compare results with the manufacturer's specification sheet.
In this model, we have an inductor with excitation current flowing out of the cross-section, which is the inner cross-section of the winding. Current is flowing up and circulating around, as shown with these current density vectors.
This produces a field going in a counterclockwise, circumferential direction in the quarter system. The goal is to produce a B field of 1.7 Tesla, according to the manufacturer's data sheet. We're using the typical core loss and elimination factor.
We apply 60 Hertz and aim to obtain 1.7 Tesla based on the magnetizing curve in this manufacturer sheet. We know for 1.7 Tesla, we know what H needs to be. We use this H value, know the mean length of the magnetic core, and then calculate the current since we also know the number of turns.
We apply excitation and the H value from the magnetizing curve and obtain 1.7 Tesla. The maximum is 1.6956 Tesla, and the average is about 1. 67. So, it's very close; there's a very few small percent difference with the manufacturer's data sheet. Let's look at the core loss.
Here, we see the core loss transient and the average in steady state is 1.10 Watts per kilogram. The manufacturer's data sheet states it's about 1.08 Watts per kilogram. We apply 60 Hertz, aim to obtain 1.7 Tesla using the H value from the magnetizing curve, and obtain the average.
We're calculating the required current for the winding. We were able to compute core loss that matches closely with the manufacturer's data sheet and it's only within a few percent difference. We can also look at the magnetizing curve. The green curve here is from the manufacturer's data sheet.
We look at the current and see this red dot, a point in the laminated core model. It's also within a few percent difference of the magnetizing curve. If we use a solid core, not a laminated core, it would be exactly like the manufacturer's curve.
In this model, we used a sheet scan tool to import the data sheet. We can import or extract the magnetizing curve and V versus P (flex density versus power loss or core loss versus flex density). Here's how it looks: We open up the material properties and see how the settings were configured.
The stacking factor is 0.966, stacked in the Z direction, and we're using a nonlinear BP curve for the core loss model. We applied the 60 Hertz, mass density, lamination thickness 0.23, and other information for this material.
That's how we calculate the core loss and compare it with the manufacturer's specification sheet to verify the results are accurate. If you have any questions, please contact us to learn about our simulation capability and request a demonstration.
Ozen Engineering Inc is an ANSYS Elite channel partner and provides training, consulting services, and ANSYS software packages. Thank you and take care.
