Amorphous iron core, manufacturing method thereof and transformer with high performance, low noise and low cost

Abstract

The invention belongs to the field of transformer manufacturing and relates to an amorphous iron core, a manufacturing method thereof and a transformer with high performance, low noise and low cost. The amorphous iron core for the transformer has iron loss of less than or equal to 0.20 W / kg and excitation power of less than or equal to 0.80 VA / kg under the conditions of frequency of 50Hz and maximum flux density of 1.35T. The width of the iron core for the transformer is made of an iron-based amorphous alloy broad band with the width between 220 and 500 mm, the no-load loss of the transformer is less than or equal to 0.25 W / kg under the conditions of frequency of 50Hz and maximum flux density of 1.35T, and the noise of the transformer is reduced by 5 to 10 decibels and the copper using amount of the transformer is reduced by more than 1 percent approximately compared with those of the conventional transformer with two layers of overlaid iron cores. By the manufacturing method, a process flow of the iron core for the transformer is simplified, a complicated process for fixing the iron cores respectively under the condition of the two layers of overlaid iron cores is avoided, property deterioration caused by assembly stress of the iron cores is reduced, the noise is lowed, the total height of the iron cores is reduced, and the material cost is saved; and the operating efficiency is improved, so that the structure of the amorphous transformer is more compact and the manufacturing mode of the conventional large-capacity amorphous transformer iron cores is completely changed.

Description

technical field [0001] The invention belongs to the field of transformer manufacturing, and relates to an amorphous iron core, a manufacturing method of the iron core and a transformer with high performance, low noise and low cost. Background technique [0002] Iron-based amorphous alloys have excellent electromagnetic properties as transformer core materials, and have been widely used in the field of transformers. The manufacturing process of the transformer iron core is generally as follows: firstly, the amorphous alloy strip is wound into a rectangular or annular iron core of the required size or a rectangular iron core is formed by "shear-lap" technology, and then the iron core is wound at 300-400 ℃ for a certain period of magnetic field heat treatment; then according to the needs of the iron core into the protective device or coated with epoxy resin on the end of the iron core to fix the shape of the iron core; finally the prepared amorphous iron core is wound and assem...

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Problems solved by technology

[0005] The object of the present invention is to provide an amorphous iron core, a manufacturing method of the amorphous iron core and a high-performance, low-noise , Low-cost transformers, that is, various types of distribution transformers, wind power transformers and other transformers with a capacity of 500KVA or more, to solve the problem that traditional large-capacity amorphous transformers above 500KVA need two or more layers of iron cores to be stacked

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