How to control EMC consistency in EPS mass production?

To ensure consistent EMC performance during EPS mass production, control is required across all stages: design, materials, production, and testing.

1. Design Robustness: EMC design must have sufficient margins to tolerate normal fluctuations in component parameters and processes. Parameter selection for critical filtering and protection circuits should not be at a critical level.

2. Key Component Control: Strict supplier management and incoming material inspection standards must be established for key components that significantly impact EMC performance (such as common-mode inductors, X/Y capacitors, magnetic rings, and shielding gaskets) to ensure batch-to-batch stability of parameters and materials.

3. Production Process Standardization: Develop and solidify production processes that affect EMC, such as PCB grounding via processes, shielded cable termination processes, filter installation torque and sequence, and screw tightening processes.

4. Production Process Inspection: Set up necessary inspection points on the production line, such as checking grounding continuity and shielding layer overlap quality.

5. Sampling and Batch Testing: Regularly sample finished products from the production line for complete EMC testing to monitor long-term consistency. Establish and strictly implement a list of EMC Critical Control Points (CCPs).