How to optimize the layout of industrial servo grounding copper busbars?

Optimizing the layout of the grounding busbar within the servo cabinet is crucial for reducing high-frequency common-mode impedance. Etymotic's layout guidelines recommend using flat, tin-plated copper busbars (recommended dimensions: 2mm thickness, 30-50mm width) to provide a low-inductance path. The busbar should be positioned close to major interference sources (such as servo drives) and filters, with the path as straight as possible, avoiding right-angle bends (using 45-degree angles or rounded transitions). The distance between the connection points of the busbar and the cabinet frame should be less than λ/10 (for 100MHz, <30cm), and secured with welded or toothed washer bolts, ensuring clean contact surfaces. Provide independent shorting wires from the components to the busbar for critical components (such as IGBT heatsinks and filter housings), rather than daisy-chain connections. After optimization, using a frequency response analyzer, the impedance of the busbar in the 1-30MHz range should be <5mΩ. This optimized layout can reduce high-frequency ground noise within the cabinet by more than 50%, improving the overall EMC performance of the system.