This workshop, drawing on measurements and expertise from Schaffner R&D Development Center, presents practical considerations for the design and construction of common-mode choke (CMC) and its impact on EMI filter suppression. Divided into four parts, the workshop offers a comprehensive exploration of CMC design and EMI filtering. The first section introduces EMI filtering concepts, including their necessity, relevant standards, and the role of Power Converters (PE) in noise generation. It covers concepts ranging from Common- and Differential-Mode noise propagation and advanced practical topics on the design of CMC. Part two compares magnetic materials based on measured parameters from various suppliers, examining permeability, temperature dependencies, and saturation in real-world applications cases. The third segment explores CMC design and construction parameters, considering core geometry, construction methods, winding techniques, and potting effects on performance. It provides practical insights into choke design and material selection. The final part addresses how the construction of CMCs impacts the performance of EMI filters in real applications, focusing on saturation and resonance phenomena. It includes methods for identifying saturation, mitigation strategies, and case studies. The workshop concludes with practical tips for optimizing EMI filter design and performance, offering valuable insights for industry professionals and researchers.
