Internal-supporting amorphous alloy core

Abstract

The invention discloses an internal-supporting amorphous alloy core which comprises a core component, wherein a low-voltage coil is arranged around the periphery of the core component; the core component comprises amorphous alloy cores divided into upper and lower layers; each of the upper and lower layers comprises two amorphous alloy cores; epoxy adhesive layers are arranged on the upper end faces of the two amorphous alloy cores in the upper layer and the lower end faces of the two amorphous alloy cores in the lower layer respectively; an I-shaped support part is arranged between the two amorphous alloy cores in the upper layer and the two amorphous alloy cores in the lower layer, and is adhered together with the amorphous alloy cores respectively; insulating plates are arranged between the left and right ends of the I-shaped support part and the low-voltage coil. According to the internal-supporting amorphous alloy core, the low-voltage coil can be effectively supported, and the short-circuit resistance of the low-voltage coil can be improved; meanwhile, pressure on the low-voltage coil is prevented from directly acting on the amorphous alloy core, so that the loss of the amorphous alloy core and the increase of noise are avoided.

Description

technical field [0001] The invention relates to the technical field of amorphous alloy iron cores, in particular to an inner support type amorphous alloy iron core. Background technique [0002] Amorphous alloy iron core is the core component of amorphous alloy dry-type transformer, its loss is only 25-30% of that of silicon steel sheet, and the energy saving effect is remarkable. But at the same time its wear is pressure sensitive and cannot withstand higher pressures. Amorphous alloy dry-type transformer cores are usually composed of smaller cores bonded by epoxy adhesive, with a rectangular cross-section. Therefore, its high and low voltage coils must also be rectangular. When a short-circuit fault occurs in the transformer, a large electromotive force is generated, which puts pressure on the low-voltage coil close to the iron core. Since the low-voltage coil is a rectangle, its long side has poor bending strength, and the effect of pressure will cause the long side ...

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Problems solved by technology

Since the inner surface of the low-voltage coil is covered by the insulating cylinder, it is difficult for the low-voltage coil to dissipate heat. At the same time, the installation of the insulating cylinder increases the distance between the low-voltage coil and the iron core, and the cost of the insulating cylinder itself will increase the manufacturing cost of the transformer; 2. The insulating support plate is directly inserted between the core and the low-voltage coil, but due to the pressure sensitivity of the amorphous alloy core, it will lead to an increase in core loss and noise, reducing the energy-saving and environmental protection effects of the amorphous alloy transformer.

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