LDC2114: About Interlayer PCB thicknes (Spreadsheet “Spiral Inductor Designer” in LDC tools)
Part Number: LDC2114
When I unzip the downloaded Slyc137e.zip folder, the folders has the following structure. LDC_Tool_Spreadsheet_calculators - Excel_FEMM_v1p28.xlsm - LDC_Tools-ext49.xlsx - Read-Me.txt
In "Spiral Inductor Designer" of LDC_Tools-ext49.xlsx, is the target material aluminum as before?
In Excel_FEMM_v1p28.xlsm, I thought that by selecting the type of the target conductor, it would be calculated as easily as with conventional aluminum, but it seems that the target can be easily replaced and calculated. not. Maybe because I don't understand how to use it.
How can I select a conductor other than aluminum and calculate it as easily (short time) as the conventional aluminum target? Please teach me how to use Excel_FEMM_v1p28.xlsm.
FEMM has been downloaded.
In the Spiral Inductor Designer, the conventional aluminum target only uses formulas in the excel document to calculate the target response. In the FEMM excel tool, the same inputs from the Spiral Inductor Designer are input into FEMM, which then runs its simulations in the background. These simulations are more accurate than the original excel tool, but they do take more time to run. You can track the progress of the simulation in the FEMM window that opens. Though there's no way to change the calculation time in the FEMM excel tool, in FEMM itself you can change the mesh size, which basically changes how detailed your simulation should be and how long it will take to run.
Current and Position Sensing
For more information, check out the Inductive Sensing FAQ
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Kristin Jones93:
Thank you for your quick reply.
Spiral Inductor Designer contains only aluminum target parameters, so calculation is quick and easy to use. I think that it is best to be able to select the type of target conductor in this conventional Spiral Inductor Designer.The FEMM Excel tool is certainly slow. Rather than linking with FEMM each time, the calculation can be quick if Spiral Inductor Designer itself incorporates the parameters of conductors other than aluminum. Although it may be linked with FEMM, it is good if the parameters of various conductors necessary for calculation with Spiral Inductor Designer are stored and can be calculated with Spiral Inductor Designer as it is with conventional aluminum.I'm sorry for my bad explanation. The point isSpiral Inductor Designer can select not only aluminum but also parameters of SUS304, nickel, copper at least..No need to FEMM. If parameters other than aluminum can be captured and memorized using FEMM, that's fine.
Maybe I don't understand how to use the FEMM Excel tool.Please tell us the correct usage.
We hope that the target conductors other than aluminum can be calculated as easily and quickly as aluminum.
In reply to user5203911:
The Spiral Inductor Designer is really meant for quick prototyping. The major benefit of the target parameters is making sure that the sensor Rp value is within the acceptable range for the given LDC device. Aluminum is a highly conductive material and approximates a "worst case" Rp value with the target interaction. It is also a very common target material.
The benefit of the FEMM tool is its accuracy and flexibility. You can save the FEMM design file so you can customize your target, including both the shape and material. There are too many target shapes and materials to effectively implement them in the Spiral Inductor Designer.
Hello, Ms. Jones
*Attachment retry Sorry if not attached
SpiralInductorDesigner with FEMM.docx
I'm sorry fot the late reply.
Does that mean that the calculated value in Excel_FEMM_v1p28.xlsm is accurate?The simulation results are listed below.
Is it better to believe the calculated result using FEMM as a result than the conventional calculated value?Is the 0.001 mm shift value in the result next to the FEMM button calculated when the target distance is 0.501 mm?I don't know what is saved in the saved result (xxx.fem). The data size is also very small. How are the saved results used?I don't know if I'm using this tool correctly. Please tell me how to use this Excel_FEMM_v1p28.xlsm
Does that mean that the calculated value in Excel_FEMM_v1p28.xlsm is accurate?
The simulation results are listed below.
A part is the conventional calculated value
B part is calculated using FEMM
Is it better to believe B as a result than A?
I don't know if I'm using this tool correctly. Please tell me how to use this Excel_FEMM_v1p28.xlsm.
Yes, the calculated values using FEMM are generally more accurate than the quick calculations in our LDC Tools excel calculator. You are also correct about the shift in target distance. It sounds like you are using the tool correctly.
The saved results are the problem setup that FEMM solves. You can open the file using FEMM and modify it if you wish, then simulate a custom problem. FEMM has a how-to guide for magnetic problems if you would like to pursue this option.
I understood what you say.
Where is the how-to guide for magnetic problems?
*Register questions related to Excel_FEMM_v1p28 separately.
You can find the tutorial here: http://www.femm.info/wiki/MagneticsTutorial
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.