Composite amorphous transformer core

Abstract

The invention provides a composite amorphous transformer core. Three individual rectangular core frames are arranged; each core frame is formed by compounding two materials, namely an amorphous alloy and oriented silicon steel in an overlapping manner; three rectangular cores are butted to form a three-dimensional triangular structure; the structure is three-phase symmetrical; three-phase magnetic circuits are equal and the shortest; a transformer is excellent in performance, low in noise and high in anti-short-circuit ability; the core is compact in structure; the transformer is small in size and light in weight; and the weight of the core is only about 2/3 that of an amorphous core with a conventional structure, so that the product cost can be greatly reduced.

Description

technical field [0001] The invention relates to the development and design of an amorphous three-dimensional triangular transformer core made of amorphous alloy strip material and oriented silicon steel. Background technique [0002] As an energy-saving and environment-friendly product, the amorphous alloy core distribution transformer has been recognized by people, and it is of great significance to the energy saving and emission reduction of the State Grid and the construction of a "green grid". In the document issued by the State Grid Corporation in July 2012 , It is clearly stipulated that in 2012, amorphous distribution transformers accounted for 50% of the distribution transformers purchased by the State Grid Corporation, and in 2013, amorphous distribution transformers accounted for 55% of the distribution transformers purchased by the State Grid Corporation. Amorphous distribution transformers account for 60% of the total distribution transformers in China. For the t...

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Problems solved by technology

The iron core of this structure mainly has the following defects: 1. The iron core is large in size and high in cost; 2. There are defects in the magnetic circuit, and the two side yokes provide a path for the third harmonic; 3. The iron core is heavy and the transformer noise is high; 4. The iron core has a rectangular cross-section, and the rectangular winding is uneven when it is stressed, and the short-circuit resistance is poor, etc.

In addition, the price of amorphous materials is also much higher than that of silicon steel materials. At present, the price of conventional structure amorphous transformers is about 1.3 times that of silicon steel transformers of the same type. In the rapid replacement, the cost performance is getting higher and higher, so the amorphous transformer with the conventional iron core structure is less and less viable and market-competitive, so that the promotion of the amorphous transformer is also subject to certain restrictions, so the amorphous transformer In order to take the lead in the market, it is necessary to make a breakthrough in the core structure, break the original design concept, and adopt new technologies, new structures, new processes and other measures to develop a new type of amorphous iron core with high cost performance, in order to ensure The development vitality of amorphous transformer

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