Nanocrystalline Common Mode Chokes
High Attenuation in Compact Designs
Common mode chokes (CMCs) based on nanocrystalline VITROPERM® offer highest attenuation in compact designs for a wide range of EMI requirements. The broad portfolio of standard types offers solutions for 1-phase and 3-phase applications as well as 4-fold CMCs.
Benefits:
- Small size and high attenuation due to high permeability and saturation magnetization
- Broad standard portfolio
- Flat temperature characteristics
- Solutions for high currents or high voltages available
Special Characteristics of Industrial Grade CMCs
- UL1446-compliant designs based on VAC’s class B insulation system (File No. E329745)
- Operating temperatures up to 130 °C
Designed for a wide range of applications:
- Switched-mode power supplies (SMPS)
- Solar inverters
- Frequency converters
- Welding equipment
- Wind generators
- Uninterruptible power supplies (UPS)
Special Characteristics of Automotive Grade CMCs
- Ambient temperature: -40 °C < Ta < +115 °C
- Max. short-term operating temperatures of Top = 160 °C
- Rated insulation voltage: Ui= 525 Vrms (functional insulation, pollution degree 1)
- Automotive qualified according to AEC-Q200
- Design taking into account ‚Technical cleanliness‘ acc. to VDA 19 Part 2
- Developed for DC/DC converters in hybrid and electric vehicles
General Characteristics
|
Application advantages |
Technical background |
|---|---|
| Small size | high µ, high BS |
| Suitable for high current and/or high voltage |
high µ, high BS, optimized core design |
| Single stage filter conpects possible | extreme broadband attenuation behavior, high permeability, low capacitance designs, slow µ decline towards higher frequencies, low Q factor in the 150 kHz range |
| High efficiency, low dissipation loss | low number of windings necessary for high L, filter stage reduction |
| Suitable for high and low ambient temperatures and high operating temperatures | high Curie temperature, material properties (µ, BS, λS) virtually independent of temperature |
| Simplified filter design | material properties (µ, BS, λS) virtually independent of temperature, constant impedance over a wide common mode current range due to linear magnetization curve |
Superior EMC Filter and Common Mode Choke Design
Nanocrystalline cores are widely used in common mode choke (CMC) applications due to their unique combination of magnetic properties. By utilizing low-cost raw materials (Fe-based) and modern, large-scale production, VITROPERM is a very competitive solution for a wide range of applications.
Our CMCs feature high attenuation which is maintained across a wide frequency range offering extremely broadband attenuation. In many cases, this characteristic can allow a reduction of the number of filter stages in multistage EMC filter configurations to reduce complexity, cost and filter volume. Copper losses are also reduced, thus increasing the efficiency and lowering component temperature.
We have extensive practical and theoretical expertise in the design of CMCs and filter configuration using nanocrystalline cores and components. At higher frequencies, the winding configuration has a major effect on the parameters of winding capacitance and leakage inductance and is therefore carefully considered in our choke designs.
Design Advantages with VITROPERM
The superior material properties of nanocrystalline VITROPERM enable common mode chokes with high inductance/impedance, even with a small number of turns, resulting in reduced copper losses, low winding capacitance and excellent HF performance. Due to the high initial permeability, low winding capacitance and a low Q-factor, VITROPERM CMCs offer a broadband insertion loss curve ranging from 10 kHz up to several MHz and improved attenuation behavior at both low and high frequencies. Better attenuation properties and an extended operating temperature range allow a reduction of the component volume by a factor of up to 3 or more under similar conditions. The excellent attenuation of VITROPERM CMCs simplifies the filter design in a wide frequency range.
Special Characteristics of Industrial Grade CMCs
- UL1446-compliant designs based on VAC’s class B insulation system (File No. E329745)
- Operating temperatures up to 130 °C
Designed for a wide range of applications:
- Switched-mode power supplies (SMPS)
- Solar inverters
- Frequency converters
- Welding equipment
- Wind generators
- Uninterruptible power supplies (UPS)
Special Characteristics of Automotive Grade CMCs
- Ambient temperature: -40 °C < Ta < +115 °C
- Max. short-term operating temperatures of Top = 160 °C
- Rated insulation voltage: Ui= 525 Vrms (functional insulation, pollution degree 1)
- Automotive qualified according to AEC-Q200
- Design taking into account ‚Technical cleanliness‘ acc. to VDA 19 Part 2
- Developed for DC/DC converters in hybrid and electric vehicles
General Characteristics
|
Application advantages |
Technical background |
|---|---|
| Small size | high µ, high BS |
| Suitable for high current and/or high voltage |
high µ, high BS, optimized core design |
| Single stage filter conpects possible | extreme broadband attenuation behavior, high permeability, low capacitance designs, slow µ decline towards higher frequencies, low Q factor in the 150 kHz range |
| High efficiency, low dissipation loss | low number of windings necessary for high L, filter stage reduction |
| Suitable for high and low ambient temperatures and high operating temperatures | high Curie temperature, material properties (µ, BS, λS) virtually independent of temperature |
| Simplified filter design | material properties (µ, BS, λS) virtually independent of temperature, constant impedance over a wide common mode current range due to linear magnetization curve |
Superior EMC Filter and Common Mode Choke Design
Nanocrystalline cores are widely used in common mode choke (CMC) applications due to their unique combination of magnetic properties. By utilizing low-cost raw materials (Fe-based) and modern, large-scale production, VITROPERM is a very competitive solution for a wide range of applications.
Our CMCs feature high attenuation which is maintained across a wide frequency range offering extremely broadband attenuation. In many cases, this characteristic can allow a reduction of the number of filter stages in multistage EMC filter configurations to reduce complexity, cost and filter volume. Copper losses are also reduced, thus increasing the efficiency and lowering component temperature.
We have extensive practical and theoretical expertise in the design of CMCs and filter configuration using nanocrystalline cores and components. At higher frequencies, the winding configuration has a major effect on the parameters of winding capacitance and leakage inductance and is therefore carefully considered in our choke designs.
Design Advantages with VITROPERM
The superior material properties of nanocrystalline VITROPERM enable common mode chokes with high inductance/impedance, even with a small number of turns, resulting in reduced copper losses, low winding capacitance and excellent HF performance. Due to the high initial permeability, low winding capacitance and a low Q-factor, VITROPERM CMCs offer a broadband insertion loss curve ranging from 10 kHz up to several MHz and improved attenuation behavior at both low and high frequencies. Better attenuation properties and an extended operating temperature range allow a reduction of the component volume by a factor of up to 3 or more under similar conditions. The excellent attenuation of VITROPERM CMCs simplifies the filter design in a wide frequency range.
Here you find futher detailed information about
VITROPERM 550 HF VACOCOIL Solutions for wide bandgap semiconductors
List of Standard Common Mode Chokes
Quick Selector for Common Mode Chokes
You did not find the right product for your application in the above list of standard products?
Then you may enter your application parameters here and you will receive further suggestions from our product range. If you would like a data sheet or further advice on a choke found in the search results, please contact us using the form at the bottom of this page. Thank you.
Whitepaper for VITROPERM available Register to receive a Whitepaper on Mitigation of EMI in Applications with wide bandgap semiconductors
Wide bandgap semiconductors – like SiC, GaN and Ga2O3– offer specific advantages in power electronics due to their special physical properties and provide guidance on the optimization of the efficiency of passive LC-filters.
Downloads
Common Mode Suppression Chokes in Nanocrystalline VITROPERM for Automotive Applications
Product Information
Related Products
Amorphous and Nanocrystalline Cores
Common mode chokes (CMCs) based on nanocrystalline VITROPERM offer highest attenuation in compact designs for a wide range of EMI requirements.
Nanocrystalline Material VITROPERM®
VITROPERM is an iron-based nanocrystalline material with an outstanding combination of soft-magnetic properties which make it the state-of-the-art material for a wide range of applications, e.g. common mode chokes (CMCs), current transformers (CTs), EMI filters and shielding material in wireless power transfer.
EMI filtering
We offer not only benchmark material for EMI solutions, but also cores and common mode chokes based on our nanocrystalline VITROPERM material.
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