EMC differences between field and laboratory frequency converters

The EMC performance of frequency converters in field applications often differs from that in standard laboratory tests. Understanding these differences is crucial for ensuring reliable operation. These differences stem from:

1. Different electromagnetic environments: Laboratory background noise is low, while field applications may contain various unknown sources of strong interference, such as welding machines, radio waves, and other frequency converters.

2. The complexity of interference: Laboratory tests typically involve a single type of interference, while field interference can be of multiple types, occurring simultaneously or randomly.

3. Grounding conditions: Laboratory tests have standard grounding plates, while field grounding may be non-standard, with high grounding impedance or ground loops.

4. Cable routing: Laboratory tests follow standard routing, while field cables may run parallel to power lines for long distances, bend, or be close to metal structures, resulting in complex coupling.

5. Load and operating conditions: Laboratory tests are usually conducted at specific load points, while field loads vary greatly, and operating conditions are complex.

6. Environmental factors such as temperature and humidity can also have an impact. Therefore, products certified in laboratories may still experience problems in the field.

Solutions: Include sufficient margins in the design; design according to harsh field environment assumptions; provide clear field installation guidelines, emphasizing grounding, wiring, and shielding specifications; conduct on-site EMC assessment tests. Yinte Electronics' high-level protection devices and solutions help products adapt to complex field environments.