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Company: Shijiazhuang FAITH Machinery Co., Ltd.
Email: crystal@faith-machinery.com
Ferrite cores are magnetic components made from iron oxide combined with metallic elements like nickel, zinc, or manganese. They are widely used to control electromagnetic fields, reduce energy loss, and suppress interference in inductive devices, transformers, and high-frequency systems.
From induction welding and tube production to power electronics, RF transformers, and EMI suppression, ferrite cores ensure efficient magnetic flux conduction and consistent performance in modern industrial and electronic applications.
A ferrite core is a magnetic core made from ceramic ferrite material, typically containing iron oxide (Fe₂O₃) combined with metal oxides like zinc, nickel, or manganese.
Key Functions:
Concentrates magnetic flux in coils and transformers
Reduces eddy current losses due to high electrical resistivity
Improves energy efficiency in induction and RF systems
Suppresses electromagnetic interference (EMI) in electrical circuits
Ferrite cores operate by guiding magnetic lines of force in inductors, transformers, or welding impeders.
Magnetic Field Concentration: The ferrite core increases inductance by providing a high-permeability path.
High-Frequency Efficiency: Its low conductivity minimizes eddy currents and power loss at high frequencies.
Flux Guidance: In tube welding applications, ferrite cores act as impeders, channeling the magnetic field inside the tube to improve weld quality.
| Type | Material | Key Feature | Application |
|---|---|---|---|
| Mn-Zn Ferrite Core | Manganese-Zinc | High permeability, low losses at low frequencies | Transformers, inductors |
| Ni-Zn Ferrite Core | Nickel-Zinc | High resistivity, low eddy current | High-frequency applications, EMI suppression |
| Ferrite Beads | Mn-Zn or Ni-Zn | Small, simple shape | EMI filtering, noise suppression |
| Toroidal Ferrite Core | Ring-shaped | Efficient flux path, low leakage | Inductors, high-Q transformers |
| Impeders/Ferrite Cores | Custom ferrite | High magnetic flux concentration | Tube welding, ERW/HFI lines |
Shijiazhuang FAITH Machinery Co., Ltd. supplies both standard and customized ferrite cores for industrial and electronic applications.
Allows more magnetic flux to pass through, increasing inductance.
High resistivity prevents heating and energy loss at high frequencies.
Effectively reduces electromagnetic interference in sensitive circuits.
Supports high-power and high-frequency applications without increasing size.
Maintains performance across a wide range of operating temperatures.
| Feature | Ferrite Core | Iron Core |
|---|---|---|
| Frequency Range | High (up to hundreds of MHz) | Low (50–100 kHz) |
| Losses | Low eddy current loss | High eddy current loss |
| Weight | Lightweight | Heavy |
| Thermal Stability | High | Moderate |
| Applications | High-frequency transformers, EMI suppression, tube welding | Power transformers, low-frequency inductors |
Conclusion: Ferrite cores are ideal for high-frequency, compact, and lightweight applications, whereas iron cores are better for low-frequency, high-current systems.
| Industry | Application | Purpose |
|---|---|---|
| Tube Manufacturing | Impeder Ferrite Core | Concentrate magnetic flux for high-frequency welding |
| Electronics | RF Transformers & Inductors | Signal coupling and energy storage |
| Power Electronics | Switching Power Supplies | Reduce energy loss and size |
| EMI Control | Ferrite Beads & Cores | Suppress electromagnetic interference |
| Telecommunications | Inductors & Filters | Stabilize high-frequency signals |
| Automotive | Ignition Coils, EMI Filters | Efficient energy transfer and noise reduction |
| Model | Type | Permeability | Resistivity | Frequency Range | Application |
|---|---|---|---|---|---|
| FAITH-FC50 | Mn-Zn Toroid | 2000–5000 | 10–50 Ω·cm | 50 Hz – 500 kHz | Transformer, Inductor |
| FAITH-FC100 | Ni-Zn Bead | 1500–2500 | 100–500 Ω·cm | 1 MHz – 500 MHz | EMI suppression, RF filters |
| FAITH-FC150 | Impeder Core | 2000 | 50 Ω·cm | 0.1–10 MHz | Tube welding, ERW/HFI lines |
| FAITH-FC200 | Custom Shape | 1000–4000 | 50–200 Ω·cm | 0.5–50 MHz | High-speed industrial applications |
Frequency Requirements
Mn-Zn for low to medium frequencies
Ni-Zn for high-frequency circuits
Magnetic Permeability
High permeability → high inductance, better flux concentration
Resistivity
Low eddy currents at high frequency require high resistivity
Temperature Range
Choose ferrite grade suitable for operating conditions
Shape & Size
Toroidal, bead, or custom shapes for your application
Application Type
Impeder cores for tube welding vs EMI suppression vs transformer cores
| Problem | Cause | Solution |
|---|---|---|
| Core cracking | Excessive heat or mechanical stress | Use water-cooled or reinforced design |
| High power loss | Wrong frequency or low resistivity | Match ferrite grade to operating frequency |
| Magnetic saturation | Excess current | Increase core size or choose higher permeability |
| EMI filtering failure | Incorrect bead placement | Verify bead size and positioning |
| Mechanical wear | Vibration or improper installation | Secure core in housing, avoid excessive force |
| Type | Size | Material | Price (USD) |
|---|---|---|---|
| Standard Mn-Zn Toroid | 10–50 mm | Ferrite | $5 – $20 |
| Ni-Zn Bead | 5–25 mm | Ferrite | $2 – $15 |
| Impeder Ferrite Core | 20–150 mm | Ferrite | $150 – $700 |
| Custom Shape Core | Any | Ferrite | $200 – $1,200 |
FAITH Machinery offers bulk pricing and OEM customization for industrial applications.
Spring & Autumn: Optimal for inspection and replacement of ferrite cores. Moderate temperature reduces thermal stress.
Summer & High-Speed Operations: Use water-cooled or high-grade ferrite cores to prevent overheating.
Winter: Maintain proper storage to prevent moisture absorption and cracking.
High magnetic permeability and low loss
Precision manufacturing for industrial and tube mill applications
Custom geometries for impeders or transformers
Global compatibility with ERW/HFI lines and electronic devices
Long service life and low maintenance
Q1: What is the difference between ferrite core and iron core?
A: Ferrite cores are ideal for high-frequency and EMI suppression, while iron cores are better for low-frequency, high-current applications.
Q2: Can ferrite cores be used in tube welding?
A: Yes, used as impeder ferrite cores to concentrate magnetic flux inside tubes.
Q3: How long do ferrite cores last?
A: Depending on application, cooling, and handling, typically 6 months to several years.
Q4: Can I customize ferrite cores for my machinery?
A: Yes, FAITH Machinery provides customized shapes, sizes, and coatings.
Q5: Are ferrite cores compatible with high-speed ERW lines?
A: Yes, especially water-cooled and tapered designs for high-speed, high-quality welding.
Ferrite cores are critical components for modern industrial and electronic applications. Whether used as impeders in tube welding, transformer cores, or EMI suppressors, ferrite cores improve:
Magnetic flux efficiency
Weld seam quality
Energy savings
Electromagnetic interference reduction
Shijiazhuang FAITH Machinery Co., Ltd. offers high-quality ferrite cores with custom design, precise manufacturing, and reliable global support, making them the preferred choice for tube production and industrial electronic applications.
Email: crystal@faith-machinery.com
Professional Ferrite Core & Impeder Manufacturer
Magnetic Precision for Industrial and Electronic Solutions
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