Heat treatment and the addition of Niobium means they have a crystal size below 10 nanometers, which results in high permeability, low losses, and high induction under a wide range of frequency environmental and mechanical conditions. They have been applied in different power electronics, including common mode chokes.
Common mode chokes are chokes that use an inductor cored with high permeable material to filter outside interferences while passing current in an electrical circuit. A common-mode choke uses two coils wound on a single core to suppress interference and prevent signal pollution.
The function is to pass equal but opposite currents, creating a flux in the core that opposes any increase in common mode current, while presenting little inductance or impedance.
The application of common mode chokes are useful for the prevention of electromagnetic interference (EMI)
and radio frequency interface (RFI) from power supply lines and for preventing electronic equipment
Common mode chokes are commonly used in industrial, electrical, electronic, telecom and energy applications to remove or decrease noise and related electromagnetic interference.
Ferrite Bead: Suited for electronic circuits no direct competitors to Nanocrystalline, less efficient, not suited for higher currents, less customizable and less adapted for energy applications.
Common Mode Choke: Better efficiency for knocking down the unwanted noise, can operate at high current with high inductance values, heavier gauge wire, allowing it to run a higher current, don’t result in saturation current, don’t distort transmission signal, only unwanted noise and more adapted
for energy applications.
Core and coil composition and alternatives
high permeability, high rated current and inductance, low DC resistance, temperature stability, wide frequency range.
Nanocrystalline (3% at. Nb) and Ferrite (Mn-Zn) cores provide the best characteristics for maximum efficiency.
Download the technical report and learn more about nanocrystalline materials
and their application in common mode chokes.