The Role Of EMI Filters In Power Electronics

As power electronics advance to accommodate higher voltages and sophisticated wide bandgap semiconductors like silicon carbide (SiC) and gallium nitride (GaN), managing electromagnetic interference (EMI) becomes increasingly complex. EMI filters are pivotal in this evolving landscape, providing essential protection by curbing noise and ensuring system reliability. These filters mitigate both common-mode and differential-mode interference, crucial for maintaining signal integrity and operational safety.

This article explores how EMI filters—comprising common-mode chokes, differential-mode inductors, and safety capacitors—play a critical role in modern power electronics. By understanding their structure and function, designers can effectively manage EMI, optimizing performance and safeguarding sensitive components.