Electromagnetic interference (EMI) is one of the most important challenges in modern power electronics. As switching frequencies and power densities increase, engineers need to understand how unwanted electromagnetic noise is generated, how it propagates through a system, and how effective EMI filters can be designed to achieve EMC compliance. This course provides a comprehensive and practical understanding of EMI filter design, starting with the fundamentals and progressing toward advanced design and EMC testing concepts. You will learn how to identify conducted and radiated interference, understand common-mode and differential-mode noise, and select appropriate techniques to reduce unwanted electromagnetic emissions.
The course covers the practical design of common-mode filters, differential-mode filters, LC filters, EMI chokes, capacitors, damping networks, and other filtering components used in power-electronic systems. You will learn how to calculate important filter parameters such as inductance, capacitance, cutoff frequency, impedance, attenuation, and insertion loss. You will also learn how component selection, parasitic effects, saturation, leakage current, component tolerances, PCB layout, grounding, shielding, and wiring can influence the actual performance of an EMI filter. These practical considerations are essential because a theoretically correct filter may not provide the expected performance when implemented in real hardware.
