Hello, friends
I’m Zahid Rahman it’s an EEE campus presentation. Today I’m discuss about losses in Transformer in Bangla? We can try to clear our concept about that.
The core loss of a transformer refers to the power that is dissipated in the transformer core due to the alternating magnetic field that is generated by the primary winding. This power loss is often referred to as iron loss, because it is mainly caused by hysteresis and eddy current losses in the iron core.
Hysteresis losses occur because the magnetic field in the core is constantly reversing direction as the AC current passes through the primary winding. As the magnetic field changes direction, the magnetization of the iron molecules in the core also changes, but not instantaneously. This lag in magnetization creates a magnetic hysteresis loop, which results in energy loss in the form of heat.
Eddy current losses occur when the changing magnetic field in the core induces currents in the conductive material of the core. These currents, known as eddy currents, create heat in the core and reduce the efficiency of the transformer.
The core loss is dependent on several factors, including the frequency of the alternating current, the magnetic flux density in the core, and the core material. To minimize core losses, transformers are often designed with high-quality core materials that have low hysteresis and eddy current losses, and the core is typically constructed in laminations to reduce eddy current losses.
The copper loss of a transformer refers to the power that is dissipated in the transformer's copper windings due to the resistance of the wire used to make the windings. When current flows through a wire, it encounters resistance, and this resistance causes some of the electrical energy to be converted into heat, resulting in power loss.
In a transformer, there are two sets of windings: the primary winding and the secondary winding. The current flows through both sets of windings, and because both windings have resistance, power is lost due to the copper losses in the form of heat. The copper loss is proportional to the square of the current flowing through the windings, and it increases as the load on the transformer increases.
The copper loss can be calculated using Ohm's law, which states that the power loss due to resistance is equal to the square of the current times the resistance:
Copper Loss = I² x R
Where I is the current flowing through the windings, and R is the resistance of the wire used to make the windings.
To minimize copper losses, transformers are designed with wires that have low resistance and high conductivity, such as copper or aluminum, and the wire is typically wound in multiple layers to increase the surface area of the wire and reduce the resistance. Additionally, the cross-sectional area of the wire is often increased to reduce the resistance and minimize copper losses.
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Thanking you.
Zahid Rahman
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