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Legacy Personal Blogs Reasons why transformer cores are assembled from separate plates
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  • Author Author: nazima
  • Date Created: 20 Apr 2020 4:41 PM Date Created
  • Views 1984 views
  • Likes 4 likes
  • Comments 5 comments
  • transformer
  • core transformer
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Reasons why transformer cores are assembled from separate plates

nazima
nazima
20 Apr 2020

The transformer's core is the principal part of any electronic and electrical system. By its efficiency, the effectiveness of the secondary and primary windings depends on how the electrical impulse reaches the system. Many people know about the equipment's estimated scheme of operation, can call the mechanism's key features. Yet the question of why the core of the transformer is constructed from separate plates finds no answer.

 

The truth is that there is an electrical impulse applied to the material, and there seems to be no difference whether it is fixed or multiple. Therefore, in a simple language, we will seek to illustrate as easily as possible why the transformer core is constructed from thin sheets, why it is necessary and how the length, width, and conductivity coefficients are chosen correctly.

 

Transformer Core Features: Principle

You need to understand the very nature of the structural component before addressing the question why the transformer core is being constructed from plates. The mechanism's aim is to concentrate the magnetic flux that goes into the system. The values are obtained by constant and corresponding measurements resulting from processing. Without the existence of a core, it would be difficult to measure the device's technical characteristics including the coefficient of error, performance and more.

 

image

 

Why are transformer cores made of different plates-improving the magnetic properties of these metals and elements.

 

The system consists of solid tiles, of varying thicknesses. You can make various product variations: from 0.5 to 0.35 millimetres, but you can also find another sheet of thickness. Cold-rolled and hot-rolled variants are distinguished by improved magnetic circuit characteristics but the assembly of the unit involves different work skills.

 

Even the toroidal ones can be dialed from a spiral folded cord. In this method assembling involves positioning the secondary winding, while the primary winding's inductive resistance can decrease dramatically (tends at zero values), which can improve the precision of the job.

 

Why is the transformer's magnetic core constructed from different sheets, if the system can have more than one hundred volts and amperes and an operating frequency of 50 Hz-enhancing the efficiency of the work and ensuring uninterrupted electricity supply for processing.

 

Devices from thin and different core plates need to be assembled-this eliminates vortex losses. They become deformed under the influence of magnetostriction on the transformer, the performance is decreased, high-quality power measurements and other technological features are impossible to carry out.

image

 

Yet through experimental calculations, we find that the values of mechanical vibrations are different, because the noise produces higher harmonics. It is clear why the transformer's core is made from different sheets and that only high quality metals are used to produce it.

 

Practice

Having learned how the core works and understanding its main technical characteristics, materials of manufacture and design features, you can understand yourself why the core of a modern transformer is assembled from separate sheets of iron. In order to understand this, you need to trace the opposite. If the core of the equipment was made of a solid solid piece of metal, this would lead to the appearance of an alternating magnetic field.

 

This in turn encourages the formation of a substantial magnetic field near the core. Emerging additional currents are not needed for stable and high-quality operation of the vehicle, they only complicate the processing of data by the secondary and primary windings.

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Top Comments

  • genebren
    genebren over 3 years ago +2
    The cores are constructed from thin laminated sheets (of silicon steel) to prevent circulation currents (eddy currents) which cause heating and energy loss within the core, decreasing the transformers…
  • colporteur
    colporteur over 3 years ago +1
    Way back in technology when glass transistors (i.e. vacuum tubes) were the norm, I believe my instruction in electronic provided the reason for plates being used in transformer construction. I can only…
  • colporteur
    colporteur over 3 years ago in reply to genebren +1
    You didn't attend Radio College of Canada in Toronto in 1979 did you? You answer aligns with what I understood. I found the Blog post more engineering than technologist. Boots on the ground, what was happening…
  • abhijeetsav
    abhijeetsav over 3 years ago

    Transformer core is engineered to reduce eddy current loss, since the wide cross-sectional area with lower resistance which causes the more eddy current with heat loss and unnecessary heat enables total output to be lower than customer planned. Such eddy currents are minimized by laminating the core and isolating the lamination with a coat of varnish. Here is an additional source on transformer cores which might help.

    https://nicoreindia.com/transformer-core/

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  • genebren
    genebren over 3 years ago in reply to colporteur

    No, I did not attend the Radio College of Canada (which would have been cool), but I was very fortunate to have had a very excellent high school electronics and broadcast radio program.  Our instructor/faculty advisor was a brave man that allow mere kids to assist in building and maintaining a 5KW Stereo FM radio station.  He was a great teacher who taught use electronics and radio communications.  Later in college, my first year (of a three year program) for a BS degree was almost all review of what I learned in high school (nods to my high school math teacher too).

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  • colporteur
    colporteur over 3 years ago in reply to genebren

    You didn't attend Radio College of Canada in Toronto in 1979 did you? You answer aligns with what I understood. I found the Blog post more engineering than technologist. Boots on the ground, what was happening inside the chassis, is what concerned me in my careers.

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  • genebren
    genebren over 3 years ago

    The cores are constructed from thin laminated sheets (of silicon steel) to prevent circulation currents (eddy currents) which cause heating and energy loss within the core, decreasing the transformers efficiency.  Here is a link to a good article on this subject:

     

    https://www.electronics-tutorials.ws/transformer/transformer-construction.html

     

    Gene

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  • colporteur
    colporteur over 3 years ago

    Way back in technology when glass transistors (i.e. vacuum tubes) were the norm, I believe my instruction in electronic provided the reason for plates being used in transformer construction.

     

    I can only speculate this because my mind has lost the memories but I can recall using a varnish to coat noisy television vertical flyback transformers to eliminate spurious sounds. I no doubt suggested the problem could be eliminated if the cores were solid and was told otherwise. I still use the varnish trick.

     

    Great tutorial! I probably won't remember the details but always enjoy discovering the why.

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