How to optimize the layout of the grounding copper busbar for EPS modules?

Optimizing the layout of the grounding copper busbars for modules (such as power modules and filter modules) within the EPS cabinet is crucial for reducing grounding impedance and improving EMC. Key optimization points:

1. Short and thick, low aspect ratio: Use flat copper busbars with sufficient cross-sectional area and minimize their length to reduce resistance and parasitic inductance.

2. Straight lines and low-inductance paths: Avoid unnecessary bends and detours, providing a direct path for high-frequency noise currents. Use rounded corners where necessary.

3. Star or radial structure: Draw copper busbars from the main grounding busbar in a star configuration to each module, providing an independent, low-impedance grounding path for each module and preventing common impedance coupling between modules via the grounding busbars.

4. Multi-point surface contact: Use multiple screws or soldering to connect the copper busbars to the module grounding terminals to ensure a large area of tight contact and reduce contact resistance.

5. Keep clean and tight: Keep the metal surfaces of the connections clean, free of paint or oxide layers, and regularly check the tightening force to prevent loosening.