Generally speaking, the electronic system has many components, complicated signal cross-linking, and complicated mutual influence. The traditional method of solving electromagnetic compatibility problems by relying on EMC testing and rectification is difficult to locate, difficult to optimize, and long in cycle. In the process of product development, considering electromagnetic compatibility design and using simulation tools for prediction and analysis, you can avoid unnecessary EMC problems before the prototype production, effectively improve R&D efficiency, save costs, and enhance product reliability. .
1. Solution
The general idea of ​​an EMC solution is shown below:
â—EMC risk analysis
Analyze sources of electromagnetic interference, objects that are susceptible to interference, and interfere with possible propagation paths, identify potential EMC risk points, and develop appropriate EMC analysis methods and countermeasures.
â— Refine the analysis object
Refine the research object so that different methods can be used to solve the corresponding EMC problem from different angles.
â—† Refine the research objects and classify them to system level, component level, cable harness level, PCB board level or component level for analysis.
â—† Propose an effective solution based on different EMC characteristics
â—† Combine the entire development process, specifications and technical methods for proper management and control of EMC
â—EMS implementation method
â—† EMC design: Consider the protection measures such as isolation and filtering according to the EMC characteristics of components; consider reasonable partition and layout according to system structure requirements and circuit points and requirements; consider signal transmission, coupling between traces and reasonable grounding Design, shielding, etc.; according to the characteristics of electronic devices, consider shielding methods and protective measures, etc.
â—† EMC simulation: select reasonable simulation software and electromagnetic algorithm; establish correct and reasonable simulation model; verify the EMC performance of the product based on the comparison of engineering experience, standards and test data, optimize and improve the design
â—† EMC test: Conduct electromagnetic interference and electromagnetic sensitivity test on the system or component, verify the function of the prototype product and whether there is electromagnetic compatibility problem; check whether the product design meets the standard before the product is finalized.
2. Main features
â— EMC risk analysis, design, simulation and testing are effectively combined to effectively control EMC issues throughout the product life cycle
â— Covers PCBs, cable harnesses, connecting devices, and housing structures in electronic products to provide a complete solution for EMC analysis of electronic products
â— Predictive analysis and verification of EMC characteristics of products with simulation software to solve most EMC problems before prototype production
3. Application case
â—Using an electronic control system PCB electromagnetic compatibility simulation analysis and test verification
The CST software is used to simulate the conducted emission (CE) of an electronic control component PCB, optimize and improve the problematic design, and carry out the prototype test. The simulation and test results have good consistency.
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