How to ensure EMC stability of frequency converters under vibration environment

To ensure stable EMC performance of the frequency converter under vibration, attention must be paid to the reliability of mechanical connections and component fixation. Vibration may cause: elastic contacts such as shielding gaskets and conductive foam to loosen or permanently deform due to continuous vibration, resulting in a decrease in shielding effectiveness. Connections such as screws and terminals may loosen due to vibration, leading to increased grounding impedance or connection failure, affecting filtering and shielding effects. Large components on the internal PCB, such as electrolytic capacitors, inductors, and filter modules, may crack or have poor soldering due to pin fatigue. Cable connections may loosen.

Countermeasures include: selecting shielding materials with good vibration resistance, such as gaskets with adhesive backing or snap-fit fixing; using anti-loosening washers or thread-locking adhesive on critical grounding screws; adding mechanical fixation to large components on the PCB, such as applying adhesive or using brackets; using connectors with locking mechanisms for cable connections, or bundling and securing cables. Modal analysis should be performed during structural design to avoid resonant frequencies. Products must pass vibration testing, and the status of critical EMC-related connection points should be reviewed after testing, with EMC retesting performed if necessary. The connectors and shielding materials of Eintech Electronics are designed with vibration resistance in mind, making them suitable for harsh environments.