Common Mode Chokes
Nanocrystalline vs Ferrite
New materials are playing a strategic role in the development of new technologies to disrupt the renewable energy sector, and nanocrystalline soft magnetic materials are a new generation of advanced soft magnetic alloys used to control and convert electricity.
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 from malfunctioning.
Common mode chokes are commonly used in industrial, electrical, electronic, telecom and energy applications to remove or decrease noise and related electromagnetic interference.
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 from malfunctioning.
Common mode chokes are commonly used in industrial, electrical, electronic, telecom and energy applications to remove or decrease noise and related electromagnetic interference.
Why common mode chokes?
CMCs cored with nanocrystalline material provide better efficiency, are better suited for higher currents with higher inductances with high frequency ripples, typical of energy applications.
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.
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.
Competitive advantages of nanocrystalline
Material Advantages
Because of high permeability, less turns are needed, less copper, less cost for single stage design, better frequency spectrum to remove further stages, design skill to maximize the material advantage, validation of specifications remains key.
Common mode chokes:
Core and coil composition and alternatives
Optimal core properties of common mode choke are essential for efficient noise filtering:
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.
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.
Interested in learning more?
Download the technical report and learn more about nanocrystalline materials
and their application in common mode chokes.