What are the characteristics of layer-type windings?

Among the types of transformer windings, layer-type windings hold a unique position. And layer-type windings are applicable to transformer windings with lower voltages and smaller capacities, such as the low-voltage windings of small distribution transformers and the windings of some control transformers. Understanding their characteristics is of great significance for the rational selection of transformer winding forms. The following will elaborate on the characteristics of layer-type windings in detail.

Content

● Structural characteristics

Layer-type windings are formed by winding wires layer by layer onto the iron core column. The wires in each layer are closely arranged, and adjacent layers are separated by insulating materials. This structure makes the layer-type windings present regular layers in appearance, with a form of layers stacked on top of each other when viewed axially. Its structure is relatively simple, and the winding process is relatively easy to understand and implement.

 ● Electrical performance characteristics

●Larger inter-layer capacitance:Due to its structural characteristics, the distance between adjacent layers is relatively close, and the electric field distribution is relatively concentrated between the layers, which results in a larger inter-layer capacitance. In the case of high-frequency alternating current, the influence of the capacitance will be more obvious and can improve the voltage distribution to a certain extent.

●Relatively small leakage reactance:Because the path of the current within the layer is relatively short and the interlinking situation of the magnetic lines of force between the layers is relatively simple, the leakage reactance is relatively small, which is more suitable for some transformer application scenarios with lower requirements for short-circuit impedance.

● Mechanical and heat dissipation performance characteristics

●Weaker axial mechanical strength: The mechanical strength in the axial direction is relatively weak. If subjected to a relatively large axial force (such as the axial electromagnetic force generated during a short-circuit), deformation between the layers is likely to occur.

●Poor heat dissipation performance:The heat dissipation of layer-type windings mainly relies on heat conduction between the layers. The heat transfer path is relatively complex, and there are no special heat dissipation oil channels or air channels, so the heat dissipation efficiency is not high.

In Summary

Layer-type windings, with their unique structural, electrical, mechanical, and heat dissipation performance characteristics, play a role in specific low-voltage and small-capacity transformer applications. When designing and selecting transformer winding forms, various factors need to be comprehensively considered. According to the actual voltage level, capacity, and operating environment conditions, layer-type windings or other types of windings should be rationally selected to ensure the performance and reliability of the transformer.

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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 transformer, 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, filtering reactor, line and load reactor, chokes, filtering reactor, and intermediate,high-frequency products.

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