Did you know that the transformer market size will grow with an 8.3% CAGR between 2022 and 2030? This is due to the increased energy demand to electrify remote areas globally.
Transformers are an integral part of any electrical grid. The operation of a transformer depends on the mutual inductions between the windings.
There are vital considerations to make during the manufacture of transformers. The aim is to reduce energy losses that develop during transmission. This is achievable through the use of a transformer core. Here is all you need to know about transformer cores.
What Is a Transformer Core?
A transformer core is a static device that provides a channel for magnetic flux to flow in a transformer. The core is constructed using thin strips of silicone steel. The silicon steel sheets are electrically isolated and coupled to reduce no-load losses in the transformer. They also have high permeability to reduce magnetizing current and core losses.
During operation, the transformer’s core and other metallic parts induce a high floating discharge. The core is usually grounded from a single point to prevent discharge. If you ground the core to multiple points, an eddy current is produced. This action produces local heating that causes thermal faults on the transformer.
Types of Transformer Cores
An efficient transformer should have iron cores and windings that utilize magnetic induction. Depending on the construction material, there are three main core class transformers in the market. These include the following.
Steel Laminated Cores
These are permeable cores suitable to transmit voltage at the audio frequency level. Their lightweight nature helps increase the transformer efficiency.
Solid Cores
They have the highest magnetic permeability and long serving life. Their transformer core resistance provides a safe performance to work under high frequency.
Toroidal Cores
These are circular cores designed to handle high-level energy loads. They give more coupling and radiate less energy outside the transformer.
Functions of a Transformer Core
Power transformers have primary and secondary windings wounded to the core. There is no direct electrical connection between the primary and secondary windings. However, the core magnetically links them and provides a low reluctance path for flux to flow.
The transformer cores provide mechanical support for the windings. The vertical legs support the coils while the lower yokes connect the legs. This action helps to improve the magnetic conduction path through the core.
The core is also designed to reduce hysteresis and eddy current losses. During operation, the power transformer produces an alternating current that leads to a shift in the magnetic flux.
The core is folded with a ferrite core of the insulating layer to prevent hysteresis and eddy current losses. In split core current transformers, the core is open to provide a connection without disrupting the wiring.
Purpose of a Transformer Core
For a transformer to function, it has to have an effective built-in transformer core. The core increases the efficiency of the transformer by minimizing power losses. When purchasing electrical equipment, it’s essential to get them from credible sources. Peak Substation Services provide you with quality electrical equipment depending on your budget.