Ferrite Core Transformers: Types and Benefits
What are Ferrite core transformers?
Ferrite core transformers are non-conductive, ferromagnetic compound that uses ferrite cores as their magnetic material to facilitate the transfer of electrical energy. The core allows efficient transfer of electrical energy between primary and secondary winding.
Ferrite core transformers are used in high frequency applications as they peak efficiency and reduce eddy current losses. They are commonly well suited for applications where size, weight and EMI or electromagnetic interference needs to be minimized.
What are the benefits of ferrite core transformers?
- Ferrite core transformers offer high efficiency as they minimize energy loss during the transformation of electrical energy.
- Soft ferrite cores have higher coercivity. They can also change their magnetic direction while ensuring negligible hysteresis losses.
- >Ferrite core transformers can operate at a wide range of frequencies and are used in both high and low frequency devices.
- Ferrite cores ensure temperature stability and consistent performance as they maintain their magnetic properties in wide temperature range.
- They offer high magnetic permeability and low electrical conductivity.
What are different types of ferrite core transformers?
Soft ferrites have a general composition of MeFe204. Here Me is one or several of the divalent transition metals such as Manganese (Mn), Zinc (Zn), Nickel (Ni), Copper (Cu), Iron (Fe) or Magnesium (Mg). The most popular among these are Manganese- Zinc and Nickel-Zinc ferrites.
Manganese Zinc Ferrite (MnZn) – These ferrites are used in low to medium frequency applications that have operating frequency of less than 5MHz. Their common applications are power supplies, audio equipment and low frequency transformers. The impedance makes them ideal for inductors up to 70MHz.
Nickel Zinc Ferrite (NiZn) – Compared to MnZn ferrites, Nickel Zinc Ferrites have better resistivity. They offer higher magnetic permeability and are well suited for wide range of applications with frequency range between 2MHz to several 100MHz. These ferrites are also suitable for inductors above 70 Mhz.
What are the different shapes of ferrite core transformers?
E-cores – E-cores are often used in high frequency applications and are offer simple bobbin winding along with easy assembly. They are economical and resemble the shape of letter “E”.
I- Cores - I- Cores resemble the shape of letter “I”. They are used for high power operations in less space. These cores offer low leakage inductance and superior voltage isolation and are commonly used in power transformer applications.
Planar Cores – Planar cores offer the advantage of no wasted space but are pricier in comparison to other cores. They are well suited for high power density and compact designs that are crucial in power electronics.
U core- U- cores have a U-shape and are popular for their compact design. They are also a good choice for low leakage and superior voltage isolation.
Toroidal cores – Toroidal cores are shaped like a ring. They offer exceptional magnetic efficiency and have high resistance to external magnetic fields applied. These ferrites have a compact size and are lightweight. Common applications include power amplifiers and audio equipment.
RM Cores – RM cores have a unique shape. They are rectangular shaped ferrite cores with a centre post. Their common applications are differential inductors, filter inductors, power inductors and broadband transformers.
Pot Cores – Pot cores offer superior magnetic shielding. They also offer the advantage of lowest leakage inductance and high Q. Common applications include broadband and narrow transformers and power transformers and inductors.
What is Cosmo Ferrites?
With state-of-the-art equipment from leading manufacturers of Europe, rigorous quality standards and well-equipped in-house R&D set up, Cosmo ensures delivery of high-quality ferrites to customers along with continuous product up-gradation. Our Core are backed with ISO Accreditation and are thoroughly tested to provide a consistent quality and exceptional performance.
For more details on our exceptional range of soft ferrite products please connect with our experts today!