Power transformer winding with low transverse eddy current loss and manufacturing method thereof

Abstract

The invention relates to a power transformer winding with low transverse eddy current loss and a manufacturing method thereof, and belongs to the technical field of transformer manufacturing. According to the technical scheme, a winding upper end area (3) and a winding lower end area (5) are formed by winding a short wire (1), a winding middle area (4) is formed by winding a common wire (2), and asmall wire (6) of the short wire is connected with a small wire (8) of the common wire in a welded mode through a weld joint (7); the section width of the short wire (1) is the same as that of a common wire, and the height of the short wire is lower than that of the common wire. According to the invention, the short wire with the same section width as a common wire and smaller height than that ofthe common wire is adopted to wind an end part area of the transformer winding; on the premise of not changing the resistance loss of the transformer winding, the transverse eddy-current loss of theend part of the transformer winding is effectively reduced, so that the load loss and hot-spot temperature rise of the transformer are reduced, the structure is reasonable and simple, the manufacturing is convenient, and the safety, reliability and economical performance of a power transformer are improved.

Description

technical field [0001] The invention relates to a power transformer winding with low transverse eddy current loss and a manufacturing method thereof, belonging to the technical field of transformer manufacturing. Background technique [0002] At present, as the capacity of power transformers continues to increase, the leakage flux density in the transformer windings is also increasing. The winding magnet wires of large-capacity power transformers generally use flat conductors whose height is significantly larger than the thickness, which leads to The lateral leakage magnetic flux at the winding end produces a large eddy current loss, which leads to an increase in the load loss of the transformer and an increase in the temperature rise of the hot spot, which endangers the service life of the transformer and poses a hidden danger to the safe operation of the transformer. Therefore, taking scientific and reasonable measures to reduce the transverse eddy current loss at the wind...

AI Technical Summary

Problems solved by technology

[0002] At present, as the capacity of power transformers continues to increase, the leakage flux density in the transformer windings is also increasing. The winding magnet wires of large-capacity power transformers generally use flat conductors whose height is significantly larger than the thickness, which leads to The lateral leakage flux at the end of the winding produces a large eddy current loss, which leads to an increase in the load loss of the transformer and an increase in the temperature rise of the hot spot, which endangers the service life of the transformer and poses a hidden danger to the safe operation of the transformer.

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