Laminations of Core are Generally Made of?
By Balaji
Updated on: March 20th, 2023
The Lamination of the Core is generally made of silicon steel laminations. It is insulated from each other by insulating varnish coatings. The thickness of core laminates is typically around 0.25 mm to 0.5 mm. The core’s basic function is to provide a low resistance, high permeability magnetic circuit that allows the magnetic flux generated by the magnetomotive force of the primary winding to be efficiently coupled to the secondary winding.
Table of content
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1. Lamination of Core
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2. Core Lamination Process
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3. Laminations of Core are Generally Made of?
Lamination of Core
The silicon steel laminations that make up the transformer core are separated from one another by an insulating varnish covering. Transformer core laminations are typically between 0.25 and 0.5 millimeters thick. The core is divided into thin layers for lamination, and these layers are kept together by insulating materials like varnish, impregnated paper, etc.
Core staggering is the act of bunching all laminations. Each layer’s effective cross-section area decreases by around 10% due to lamination, increasing the effective resistance. Eddy’s current losses will decrease as effective resistance rises.
Core Lamination Process
The core is divided into thin layers for lamination, and these layers are kept together by insulating materials like varnish, impregnated paper, etc. The effective resistance rises due to the reduction in each layer’s effective cross-section area caused by lamination.
- Eddy’s current losses will decrease as effective resistance rises. Due to the insulation between the laminations, eddy current losses in a laminated iron core are decreased.
- Insulating material between laminations is necessary for electrical isolation to prevent eddy current loss.
- The process of bunching every lamination is known as core staggering.
- Because of lamination, each layer’s effective cross-section area is reduced by around 10%, which enhances effective resistance.
Summary:
Laminations of Core are Generally Made of?
Silicon Steel is used to make laminations of the core. Transformer core laminations are made from silicon-iron alloys (iron containing about 3% silicon), more commonly referred to as silicon steel, electrical steel, transformer steel, or staroy called by the product name. The process that bunches the lamination is called core staggering.
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