What’s New in EMI Filter Designs and Applications, How They Aid EMC Compliance
Electromagnetic interference (EMI) is becoming a crucial factor as new designs, ranging from industrial to lighting to renewable energy, become more interconnected and employ sophisticated IT and communication systems. There are several design venues with which to suppress interference and minimize unwanted emissions, both preemptively during the design phase and reactionarily in the troubleshooting phase.
For instance, take simulation tools to predict EMI issues, which require engineers to obtain data for multiple components and then conduct simulations. However, this mandates skilled and dedicated engineering teams, and no simulation model is perfect amid unpredictable design changes. Likewise, while current probes attached to oscilloscopes or spectrum analyzers can efficiently locate emissions to suppress interference, they can also increase the reception sensitivity. As for metal shields installed on the transmission path to suppress noise, the use of shields generally increases the cost and weight of the device.
Add the increasingly shorter design cycles and cost constraints to the above design practices, and discrete EMI mitigation solutions emerge as a viable option for design, troubleshooting and retrofit phases. Off-the-shelf EMI filters are highly versatile, and they can serve a wide range of applications. Moreover, they can be customized for specific EMI suppression requirements during the design or troubleshooting stages.
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