What are the characteristics of foil winding?

Foil winding are a type of winding structure commonly used in transformers and reactors, offering unique advantages that enhance both the performance and manufacturing efficiency of electrical equipment. The main characteristics of foil winding are as follows:

Features

●High Automation and Efficiency in Production 

The production of foil winding is typically carried out on specialized winding machines, which are highly automated. This automation increases production efficiency, reduces human error, and ensures consistent product quality. Due to the wide and flat structure of the foil, the winding process is relatively simple, enabling efficient mass production, which meets the high-quality demands of modern electrical equipment.

●Large Interlayer and Longitudinal Capacitance  

The structure of foil winding resembles that of parallel-plate capacitors, resulting in large interlayer and longitudinal capacitance, which effectively reduces parasitic inductance in high-frequency transformers. This characteristic helps improve the electrical performance of the winding, especially in high-frequency applications. Additionally, foil winding eliminate the spiral angle, leading to a more uniform current distribution, reduced electrical stress, and enhanced resistance to electrical surges.

●High Mechanical Strength and Short-Circuit Resistance  

Foil winding possess high mechanical strength, with tightly wound turns and a smooth surface that minimizes the formation of air bubbles. This compact structure allows the winding to better withstand the electrodynamic forces generated during short circuits, thereby improving its short-circuit resistance. In power environments with significant load fluctuations, foil windings demonstrate superior stability and durability, greatly extending the service life of the equipment.

●Easy Control of Geometrical Dimensions and Convenient Installation 

Foil winding have a regular geometric structure, with minimal axial and radial deviations, making them easy to install and construct. The tightly packed turns allow for even distribution of insulation materials, further enhancing the safety and insulation performance of the winding. Moreover, the smooth surface helps maintain uniformity during production and installation, reducing installation errors and ensuring the long-term reliable operation of the equipment.

In summary

The foil winding is widely used in high-performance power equipment due to its high degree of automation in production, significant capacitance characteristics, excellent mechanical properties, and convenient installation features, which notably enhance the overall performance and reliability of transformers.

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LuShan, est.1975, is a Chinese professional manufacturer specializing in power transformers and reactors for 49 years. Leading products are single phase and three phase isolation transformers, electrical transformer, distribution transformer, step down and step up transformer, low voltage transformer, high voltage transformer, control transformer, toroidal transformer, R-core transformer; DC inductors, AC reactors, line and load reactor, chokes, filtering reactor, and intermediate, high-frequency products. Our power transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering(furnace), central air conditioning.

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