Low-noise dry-type transformer structure

Abstract

The invention discloses a low-noise dry-type transformer structure, which comprises iron cores, a high and low voltage coil and a base, wherein the top and bottom of the high and low voltage coil arerespectively provided with the iron cores; the iron core located at the top of the high and low voltage coil is installed on the high and low voltage coil though an upper clamping member and a vibration-proof butterfly elastic washer; and the iron core located at the bottom of the high and low voltage coil is installed on the base through a lower clamping member and a vibration-damping base insulating piece. According to the invention, the vibration-damping base insulating piece is placed between the bottom iron core and the base, thereby enabling the whole iron core of the dry-type transformer to form a vibration-proof sound insulation layer with the high and low voltage coil and the base, and reducing the noise generated by the resonance of the components; the upper and lower clamping members and the iron cores are provided with planar tooth-shaped insulating pieces therebetween, the teeth are provided with silica gel pads, and heat dissipation gaps are reserved between the teeth, thereby having a very high heat dissipation function and a vibration-proof sound insulation effect. The dry-type transformer is extremely low in noise when being in operation, and can be used in residential areas and commercial distribution centers.

Description

technical field [0001] The invention belongs to the field of power equipment, relates to a power distribution device, in particular to a low-noise dry-type power distribution transformer structure. Background technique [0002] There are three sound sources in the noise mechanism of the dry-type transformer body, one is the iron core, the other is the winding, and the third is the cooling fan, that is, the sum of the noise caused by no-load, load and cooling fan. The reason for the noise of the iron core is that under the action of the alternating magnetic field of the silicon steel sheet that constitutes the iron core, a small change will occur, that is, magnetostriction. Magnetostriction makes the iron core vibrate periodically with the change of the excitation frequency. The magnetostrictive deformation of the iron core and the winding, upper and lower clamps and Caused by electromagnetic forces within the magnetic shield. The reason for the vibration of the winding is t...

AI Technical Summary

Problems solved by technology

Therefore, in the prior art, the vibration reduction and noise reduction technology for dry-type transformers is not effective. Therefore, it is particularly important to block the outward transmission of transformer core vibration and noise, which is also a research topic for dry-type transformer manufacturers.

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