TDK introduces new ultra-thin, lightweight permalloy film sheets to shield low frequency band noise

TDK announced the extension of its Flexield family of permalloy thin film sheets with the new IPM01 series, which features high-permeability and high loss in a lightweight and 0.006 mm ultra-thin design. This new material effectively shields low-frequency band noise, which is becoming a growing issue in electric vehicles (EVs). Mass production of the product began this month, May 2024.
Over the years, electronic subsystems have been added to gas-powered automobiles for information, communications, and navigation. All of those subsystems generate high-frequency noise measured in megahertz (MHz). Evs also integrate all of those electronic subsystems, but they eliminate internal combustion engines and replace them with electric motors and inverters that generate lower-frequency noise in the kilohertz (KHz) range. Conventional noise suppression in the kHz band requires thick shielding materials, some of which are metal. The problem is that these materials are too bulky and too heavy for Evs, where minimizing size and weight are top priorities. This new IPM01 series is made of permalloy alloy with extremely high permeability formed into thin film sheets, meaning it can suppress low frequency band noise more effectively than conventional shielding materials and metal shields while r...