How to improve EPS radiated immunity (RS)?

Improving EPS's immunity to radiated interference (RS, such as IEC61000-4-3) hinges on reducing the system's sensitivity to radiated fields and preventing interference intrusion. Improvement measures include:

1. Enhancing cabinet shielding effectiveness: Ensuring the integrity of cabinet shielding (addressing gaps and openings) is the first line of defense.

2. Improving cable shielding and grounding: Using shielding layers for all incoming and outgoing cables and grounding them 360 degrees at the cabinet entrance to prevent interference from coupling through cables.

3. Port filtering: Effectively filtering all incoming and outgoing cable ports, especially signal and communication ports, using common-mode chokes (such as the CML series) and filter capacitors.

4. Internal circuit immunity design: Implementing measures such as partial shielding, adding filter capacitors, using watchdog timers, and software filtering for sensitive circuits (such as reset, crystal oscillator, and sampling).

5. Reducing internal antenna effects: Controlling the length of internal PCB traces and cables to avoid forming efficient receiving antennas. This comprehensive improvement is achieved through systematic shielding, filtering, and circuit reinforcement.