Power transformer cores are used to provide a magnetic current path through the primary and secondary windings.
The heart of a power transformer depends primarily on three factors: voltage, the current flowing through it, and operating frequency.
However, size constraints and core construction costs are also seen as other important factors.
Ferrites, iron cores and alloy steels are widely used materials for making cores. The required characteristics of commonly used transformer cores are as follows:
High permeability CRGO alloyed silicon steel, containing 5% silicon, nominally approximately 0.35mm thick
The core of a transformer made of the iron core is only used for small transformers because it has better transformer capability than other cores of this size. However, it cannot be used for larger sizes because losses will be high due to the formation of eddy currents.
Very thin, electrically insulating laminated steel sheets are used to reduce losses, especially for larger power transformer cores.
Because these laminates block the flow path of eddy currents, which are protected by non-conductive materials such as varnishes, they can be lost due to overheating. Therefore, it can improve the efficiency of power transmission.
When small currents called eddy currents are induced, the magnetic flux penetrates and splits through the core.
The thickness of the laminate is generally determined by the cost of manufacturing the thin laminate and the resulting losses. Many power transformers operate at frequencies of 50 to 60 Hz and are laminated with thicknesses of 0.3 to 0.5 mm.
These cut laminations are then separated and stacked according to the necessary dimensions of the power transformer core. It is then clamped and permanently attached to the bolt.
Since the bolts are running at a high vibration rate of 100Hz, the hood is likely to come loose.