Effectiveness of Cable Sleeves to Suppress Interference in Electrified Vehicles

The article delves into the effectiveness of cable sleeves, particularly cable ferrites and nanocrystalline sleeves, in suppressing electromagnetic interference in electrified vehicles. It highlights the increasing electrification of vehicles and the subsequent challenges in electromagnetic compatibility. The study by Würth Elektronik uses a laboratory setup to verify the effectiveness of these sleeves through practical measurements. The article discusses the intrinsic physical properties of ferrite materials, the geometry of the sleeves, and the electromagnetic properties of cable systems that influence the effectiveness of interference suppression. It also explores the amplitude spectra of interference signals and system impedances in electric vehicles, providing insights into the optimal frequency ranges for different ferrite materials. The laboratory setup is described in detail, emphasizing the importance of considering the impedances of the interference source and sink. The article concludes with a comparison of the typical parameters and preferred frequency ranges of various ferrite materials and nanocrystalline materials, offering a comprehensive overview of the topic.