Factors affecting the application effect of EI transformer lamination technology

 

The application effect of EI transformer lamination technology will be affected by many factors. The following are some of the main aspects:

Material properties
– Core material: Silicon steel sheet is a commonly used core material, and its magnetic permeability, resistivity and other properties have a significant impact on the performance of the transformer. Silicon steel sheets with high magnetic permeability can make it easier for the magnetic field to pass through the core, reduce magnetic resistance, and improve electromagnetic conversion efficiency; high resistivity can reduce eddy current loss. Although new materials such as amorphous alloys have lower losses, they also have problems such as high processing difficulty and high cost, which affect their wide application.
– Insulating materials: Insulating materials are used to isolate laminations, and their performance affects the insulation performance and heat dissipation effect of the transformer. High-quality insulating materials should have high dielectric strength, low dielectric loss and good heat resistance to prevent short circuits and partial discharges between windings and ensure safe operation of the transformer.

Lamination process
– Lamination accuracy: The dimensional accuracy and shape consistency of the laminations are crucial. If the lamination size error is large, it will lead to loose core assembly, air gap, increased magnetic resistance, uneven magnetic field distribution, and thus reduce the efficiency and performance of the transformer.
– Lamination method: Different lamination methods, such as staggered lamination and step lamination, have different effects on transformer performance. Staggered lamination can make the magnetic circuit smoother and reduce hysteresis loss; step lamination can optimize the magnetic field distribution and improve electromagnetic coupling efficiency. The selection of a suitable lamination method can be determined according to the specific transformer application scenario and performance requirements.

Operating environment
– Temperature: If the operating environment temperature is too high, the performance of the core material will change, such as reduced magnetic permeability and increased loss. It will also accelerate the aging of the insulation material and reduce the service life of the transformer. Therefore, it is necessary to effectively design the heat dissipation of the transformer to ensure that it operates within the specified temperature range.
– Humidity: A high humidity environment may cause the surface of the core and winding to become damp, reduce the insulation performance, and even cause faults such as short circuits. Therefore, the transformer needs to take moisture-proof measures, such as adopting a sealing structure and installing a desiccant, to ensure its normal operation in a humid environment.
– Electromagnetic interference: Electromagnetic interference in the surrounding environment may affect the magnetic field distribution and operating performance of the transformer. For example, the electromagnetic field generated by nearby high-voltage transmission lines, large motors and other equipment may interact with the magnetic field of the transformer, resulting in increased losses and noise in the transformer.