How to control EMC consistency in mass production of intelligent controllers (PACs)?

Ensuring consistent EMC performance in mass production of PAC (Power Acoustic Controller) requires attention to design, materials, and manufacturing. During design, sufficient filtering and shielding margins (e.g., 6dB) should be reserved. Materials with good consistency should be selected, such as common-mode inductors (CMZ series) and shielding gaskets, specifying brands and models.

During production, key processes should be controlled, such as the torque of the shielding chamber mounting screws and the compression of the conductive gaskets. An EMC testing sampling system should be established, with each batch of samples undergoing radiated emission and ESD testing. When problems are found, the issue should be traced back to the design and manufacturing process. Through these controls, the EMC performance of mass-produced products can be consistent with the samples, with a pass rate greater than 95%, meeting quality system requirements.