Ferrite Core for High Frequency Transformer

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Content

• Perpose of Ferrite Cores
• Ferrite Core Transformer Types
• Manganese Zinc Ferrite (MnZn)
• Nickel Zinc Ferrite (NiZn)
• Shapes
• E, I Cores
• ETD Cores
• EFD Cores
• EER Cores

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Purpose of Ferrite Cores

• Ferrite has a high permeability, making it ideal
  for use as a core material. It has a high
  resistivity as well. Eddy currents and hysteresis
  losses are held to a minimum as a result of this.
• Ferrite is suitable for high frequency
  transformer core design because of its high
  permeability and resistivity. The only negative
  is that, as a ceramic, it is fragile and
  susceptible to cracking.

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Ferrite Core Transformer Types

• Manganese Zinc Ferrite (MnZn) - useful for
  inductors up to 70 MHz
• Nickel Zinc Ferrite (NiZn) - Higher resistivity
  than MnZn, useful when frequency range is from
  2MHz to MHz in the several hundreds and ideal for
  inductors over 70 MHz
• Temperature and permeability play huge roles in
  ferrite core selection, since ferrite materials
  begin to lose magnetic capabilities under 500
  degrees Celsius. Ferrites are also classified by
  shapes such as

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Ferrite Shapes

• E, I Cores - easy to construct with simple bobbin
  winding, making them useful for power and telecom
  inductors, along with broadband, converter and
  inverter transformers
• ETD Cores - center post has minimal winding
  resistance, ideal for power transformers and
  inductors
• EFD Cores - made with cross-sectional areas
  provide utility for compact transformers
• EER Cores - based on a round center post,
  providing a shorter winding

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• Another way is to design a custom transformer to
  meet the specific requirements of a given
  application. Keep in mind that while
  customization can provide better output at a
  higher upfront cost, it may also provide better
  long-term cost efficiency.
• Based on the materials used to make inductors,
  ferrites play a significant role in how they
  work. A ferrite, which is used as the magnetic
  core of a transformer, is made up of iron oxides
  mixed with other components. The choice of
  ferrite materials has a major effect on the
  application's results.

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Thank You

• If you need more assistance, you can feel free to
  connect with our experts who will take you
  through our wide range of ferrite products
  available for several applications. Contact us to
  learn more.

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www.cosmoferrites.com
91-11 4939 8800