Which Materials Can Be Used For Transformer Magnetic Core - Miracle Electronics - PowerPoint PPT Presentation

About This Presentation
Title:

Which Materials Can Be Used For Transformer Magnetic Core - Miracle Electronics

Description:

A variety of materials can be used to manufacture magnetic cores in a transformer. Learn about the different types of materials and their qualities here. – PowerPoint PPT presentation

Number of Views:60

less

Transcript and Presenter's Notes

Title: Which Materials Can Be Used For Transformer Magnetic Core - Miracle Electronics


1
Transformers feature primary, secondary and
tertiary windings, whose working depends on the
flux that is produced between these windings.
Magnetic cores in the transformers serve as the
pathway of the flux. These cores are magnetic
materials with high magnetic permeability used
to guide magnetic fields in transformers and
other electrical or magnetic devices. They are
made of ferromagnetic metals or compounds. There
are a variety of materials that can be used to
manufacture these magnetic cores, the most common
ones mentioned in this blog post.
Solid Iron Solid iron cores serve as an excellent
pathway to provide magnetic flux and retain high
magnetic fields without saturating the iron.
However, these cores are not recommended for
2
transformers that operate in AC applications
because its magnetic field produces large eddy
currents, which in turn produce lots of heat at
high frequency. Carbonyl Iron Carbonyl iron is
a highly pure iron that has stability across a
wide range of temperatures and magnetic flux
levels. Carbonyl iron powder comprises of
micrometer-sized iron spheres coated with a thin
insulating layer that reduces the eddy current at
high temperature. Often known as RF cores, these
carbonyl iron cores have lower losses, but lower
permeability too. Amorphous Steel Magnetic
cores that use amorphous steel are made of many
layers of paper-thin metallic tapes that help to
reduce the flow of eddy currents. These cores
have fewer losses than other magnetic cores,
which help them to easily operate at high
temperatures as compared to standard lamination
stacks. However, amorphous steel is too brittle
to be used in motors, which is why they are used
in high efficiency transformers that operate at
medium frequencies. Silicon Steel Silicon steel
has high electrical resistivity and offers high
saturation flux density. It also has high
permeability and low losses, which enables
silicon steel cores to be used in
high-performance applications. To reduce eddy
current losses, most low frequency transformers
use laminated cores made of stacks of thin
silicon steel to provide current with space only
enough to flow through narrow loops between
every lamination layer. (You can learn more about
laminated magnetic cores below in the
blog.) Amorphous Metals Amorphous or vitreous
metals are glassy and non-crystalline, thus can
be used to create high- efficiency and
high-performance transformers. The low
conductivity of these materials helps to reduce
eddy currents. These amorphous metals can be
highly responsive to magnetic fields for low
hysteresis losses, and can have low conductivity
to reduce eddy current losses. Ferrite
Ceramics Ferrite ceramics are made from iron
oxide and one or multiple metallic elements,
which are made in different specifications to
meet diverse electrical requirements. Ferrite
ceramics
3
magnetic cores are used in high-frequency
applications and serve as efficient insulators to
prevent eddy currents. However, losses like
hysteresis loss can still occur with these
ceramics. Laminated Magnetic Cores Laminated
magnetic cores are made of stacks of thin iron
sheets coated with an insulated layer, which lie
parallel to the lines of flux. These insulation
layers serve as barriers to prevent eddy current
so that it can flow only through the narrow loops
within each single lamination layer. This
technique prevents major of the current from
flowing and reduces eddy current to a very low
level. Moreover, narrow laminations can reduce
power losses to a great extent too. Thus,
thinner the laminations, lower the eddy current
loss will be. As you can see above, every
material has its own pros and cons. This is why
you need to consult an electrical expert to know
which core will be the most suited for your
transformer. And to rely on experts for
providing you with transformers that can be
customized as per your requirement, the name is
Miracle Electronics, the leading name as a
transformer manufacturer in India since more
than 20 long years now! For more information
visit Miracle Electronics
Write a Comment
User Comments (0)
About PowerShow.com