Electromagnetic Field Simulator Simplified Modeling for EMI Analysis
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Solution Overview
Problem
Existing electromagnetic field analysis methods face challenges in efficiently creating analyzable models on general-purpose PCs due to increased calculation amounts and require extensive time and cost for accurate EMI simulation, especially when optimizing IC and oscillator placement on printed boards.
Innovation Solution
An electromagnetic field simulator that extracts model creation information, automatically creates simplified models by identifying conductive components with antenna operating portions, and performs electromagnetic field analysis, allowing for efficient analysis even on general-purpose PCs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detailed structures of printed boards, cables, and metal housings are input for electromagnetic field analysis, then measurement precision is improved, but calculation amount increases making analysis difficult by general-purpose PC
Solution Approach 1:
The patent segments the electromagnetic field analysis into two distinct models: a detailed model for accurate EMI level calculation and a simplified model for rapid analysis. The detailed model includes all structures (printed boards, cables, metal housings) while the simplified model uses representative structures. This segmentation allows each model to serve its specific purpose without compromising overall analysis efficiency and accuracy.
Solution Approach 2:
The patent creates a simplified model that copies only the essential electromagnetic field characteristics from the detailed model. By using representative structures that replicate key EMI behaviors without including all detailed geometries, the system achieves accurate EMI level prediction while reducing calculation complexity to levels manageable by general-purpose PCs.
2Measurement precision
If detailed conditions of circuit configuration and wiring mode are reflected in simulation, then measurement precision is improved, but time required for model creation increases causing increase in calculation cost
Solution Approach 1:
The patent separates the modeling process into two stages: creating a detailed model only when EMI level calculation is required, and using a simplified model for other electromagnetic field analyses. This segmentation eliminates the need to always create detailed models, significantly reducing model creation time while maintaining EMI calculation accuracy when needed.
Solution Approach 2:
The simplified model copies only the necessary electromagnetic field characteristics from the detailed model, excluding unnecessary circuit configuration and wiring mode details. This selective copying reduces model creation time and calculation cost while preserving sufficient accuracy for EMI level assessment.
3Manufacturing precision
If analysis space is enlarged to improve disposition of structures, then manufacturing precision is improved, but calculation amount increases
Solution Approach 1:
The patent uses a simplified model that copies the essential spatial relationships and electromagnetic field characteristics of the enlarged analysis space without including all detailed structures. This allows component disposition optimization to be performed with reduced calculation complexity, making it feasible to analyze larger spaces while maintaining manufacturing precision for component placement.
Data Source
AI summary
An electromagnetic field simulator performs: a model creation information extraction process; a model automatic creation process; and an electromagnetic field analysis process. The model creation information extraction process includes: obtaining evaluation frequency information that includes an evaluation frequency for an apparatus suffering noise; obtaining target material information of a determination target; determining whether a conductive component is present in the obtained target material information; and determining the conductive component as having an antenna operating portion that operates as an antenna if the conductive component is present in the obtained target material information. The model automatic creation process includes: creating the model to have a simplified shape except for the component to be determined determined as having the antenna operation portion of the component. The electromagnetic field analysis process includes: performing electromagnetic field analysis on the created model.