Transformer with amorphous iron core with circular section and protective box

Abstract

The invention provides a transformer with an amorphous iron core with a circular section and a protective box, and belongs to the technical field of transformer manufacturing. The transformer comprises a iron core, a protective box and a coil. The protective box is sleeved on the iron core, and the coil is wound on the protective box to form an amorphous alloy transformer body. The iron core comprises an inner frame and an outer frame, the inner frame is formed by sequentially rolling a plurality of amorphous alloy strips with different widths, the single-side section of the inner frame formsa multi-step-shaped iron yoke, and the sections, arranged side by side, of every two adjacent inner frames are combined into an approximately circular iron yoke. The outer frame is rolled on the outersides of all the inner frames, the outer frame is formed by sequentially rolling a plurality of amorphous alloy strips with different widths, and the adjacent side walls of the outer frame and the inner frames are combined to form an approximately circular iron yoke. Under the combination of the inner frame and the outer frame, each section of the whole iron core is a multi-stage approximately circular iron core. The protection box comprises two half boxes, a middle hole, a through hole and a central cover, the protection box is made of an insulating material, and the two half boxes are covered up and down to form the whole protection box.

Description

technical field [0001] The invention belongs to the technical field of transformer manufacturing, in particular to a transformer with a circular section amorphous iron core and a protective box. Background technique [0002] The amorphous alloy iron core commonly used in amorphous oil-immersed transformers is wound from iron-based amorphous alloy strips. During the assembly process of the body, the iron yoke of the amorphous alloy core needs to be opened to assemble the coil. The amorphous alloy iron core may generate fragments in various links such as hoisting and transportation of the whole machine, and the generated fragments may flow around the high-voltage coil along with the operating oil, causing the product to discharge or even break down. After the whole transformer fails, the amorphous core cannot be reused. In addition, in the traditional oil-immersed transformer, the force is applied to the coil but not to the iron core. The transformer with this structure has ...

AI Technical Summary

Problems solved by technology

During the assembly process of the body, the iron yoke of the amorphous alloy core needs to be opened to assemble the coil. The amorphous alloy iron core may generate fragments in many links such as hoisting and transportation of the whole machine, and the generated fragments may flow around the high-voltage coil along with the operating oil, causing the product to discharge or even break down

After the whole transformer fails, the amorphous core cannot be reused

In addition, in the traditional oil-immersed transformer, the coil is stressed but the iron core is not stressed. The transformer with this structure has poor ability to resist sudden short circuit.

[0003] At present, the iron core structure of amorphous alloy transformers is mostly a rectangular cross-section structure, and the coil is naturally also a rectangular cross-section structure. This structure will cause three problems. Product competitiveness, the third is that the mechanical properties of the rectangular cross-section coil are poor, the ability to resist sudden short circuit is poor, and there are potential safety hazards

[0004] The invention patent application CN108257769A submitted by our company earlier, an amorphous alloy oil-immersed transformer, proposed a technical solution for adding a high-strength box to the amorphous alloy iron core, but the technical solution failed to solve the problem of making the amorphous iron core It has a circular cross-section or a similar circular structure, and a technical improvement plan is still proposed on the basis of a rectangular cross-section amorphous iron core

In addition, the technical proposal does not give details of the structural relationship between the high-strength box and the amorphous iron core, nor does it give details of the structural relationship between the coil and the high-strength box

[0005] Publication No. CN 102623150A proposed the technical idea of ​​setting a protective box outside the amorphous iron core, but it failed to solve the problem of setting the amorphous iron core in a circular or quasi-circular shape. Based on the addition of a protective box

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