Single-phase shell type amorphous alloy dry-type transformer body

Abstract

The invention relates to a single-phase shell type amorphous alloy dry-type transformer body which comprises a shell type core, an iron yoke and a rectangular coil; the shell type core is formed by rolled amorphous alloy; an epoxy resin insulating piece is arranged on the outer side of the iron yoke; an upper positioning plate and a lower positioning plate are mounted on the upper end surface and the lower end surface of the inner side of the rectangular coil respectively, and an upper clamping piece and a lower clamping piece, which correspond to the upper positioning plate and the lower positioning plate, are arranged on the upper end surface and the lower end surface of the outer side of the rectangular coil respectively; a cushion block is arranged between the rectangular coil and the upper positioning plate; and a block is connected to the lower end of the lower clamping piece. Compared with the traditional single-phase dry-type transformer, the epoxy resin insulating piece is adopted in the invention, so that when the coil short-circuits, the short circuit force does not act on the amorphous alloy iron core; since the transformer body adopts the structural components such as the clamping pieces, the positioning plates and the like, smaller mechanical force is applied on the iron core, which better adapt to the specificity of amorphous alloy iron core strips; and the invention has the advantages that the short circuit resistance capability of the transformer is improved, the structure is compact, and the transportation is convenient.

Description

technical field [0001] The invention relates to an amorphous alloy dry-type transformer, in particular to a body of a single-phase shell type amorphous alloy dry-type transformer. Background technique [0002] Amorphous alloy transformers use amorphous alloys with excellent magnetic conductivity to manufacture transformer cores, which can obtain very low loss values ​​and are excellent energy-saving products. More and more attention. However, since the amorphous alloy is very sensitive to mechanical force, the transformer needs to take special fastening measures on the structure, so the force on the iron core should be reduced as much as possible, and the iron core should not be used as the main load-bearing structural part, resulting in poor short-circuit resistance of the amorphous alloy transformer. , we must consider changing the status quo to ensure safety. [0003] At present, the amorphous alloy transformer with the iron core as the core structure is still relativel...

AI Technical Summary

Problems solved by technology

When the transformer with this structure is subjected to short-circuit electromotive force, the direction of radial force borne by the high-voltage coil is outward, the direction of radial force borne by the low-voltage coil is inward, the electromotive force borne by the iron core is relatively large, and the amorphous alloy strip has Fragile, high hardness, difficult to cut and process, the iron core cannot directly bear the large force from the outside world, the cross section of the iron core is generally rectangular, if it is round, D-shaped, etc. of silicon steel products, its manufacturing cost is very expensive

The high-voltage and low-voltage coils are designed to be rectangular. In a core-type transformer, the radial short-circuit electrodynamic capacity of the rectangular coil is smaller than that of the conventional circular coil, and the mechanical strength of the rectangular coil is poor.

[0004] In the existing amorphous alloy transformer structure, the axial direction of the coil is tightened by the upper and lower clamps, which can withstand the axial short-circuit force. However, if the coil is short-circuited, the impact electromotive force generated by the coil directly acts on the amorphous alloy. Iron core, the amorphous alloy core cannot withstand it, which has become the most serious problem when the amorphous alloy transformer is short-circuited

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