Impregnation method of iron core and product thereof

Abstract

The invention provides an impregnation method of an iron core, which comprises the following steps: (1) preheating insulating oil; (2) impregnating a semi-finished product; and (3) baking the semi-finished product to obtain a finished product. The iron core product prepared by the impregnation method has the advantages that the oxidation resistance and the anti-rust capacity of the surface of theiron core are improved, the insulating capacity among layers of the iron core is greatly improved, and the magnetic induction loss of the iron core in magnetic field environment is reduced; every twoadjacent layers of the iron core product are fully bonded through the cohesiveness of the insulating oil to form an integrated seamless iron core, thereby eliminating the structural abnormality of the coiled iron core caused by passing current, reducing the eddy current loss caused by untight bonding among the layers of a sheet type structure, and preventing the iron core from being scattered, cracked and the like when the iron core is cut; and the iron core prepared by the method is mainly used as a transformer iron core. The invention also discloses the iron core product prepared by the method.

Description

technical field [0001] The invention relates to electronic manufacturing technology, in particular to an iron core impregnation method and its products. Background technique [0002] The iron core is the key component of the magnetic circuit of the transformer. In the prior art, the iron core is usually made of electrical silicon steel sheets, and there is also a ring-shaped iron core rolled with silicon steel strips; the iron core is made of silicon steel sheets. Punching, stacking, clamping and other processes form a magnetic circuit with joint air gaps. Due to technical needs, this kind of product needs to cut the iron core during the processing process, but the existing iron core Due to the relatively small bonding strength between layers, fragments and cracks often appear during cutting processing, resulting in the scrapping of the iron core and a great waste of materials, and the insulation effect between the layers of the iron core is not very prominent , In the proc...

AI Technical Summary

Problems solved by technology

[0002] The iron core is the key component of the magnetic circuit of the transformer. In the prior art, the iron core is usually made of electrical silicon steel sheets, and there is also a ring-shaped iron core rolled with silicon steel strips; the iron core is made of silicon steel sheets. Punching, stacking, clamping and other processes form a magnetic circuit with joint air gaps. Due to technical needs, this kind of product needs to cut the iron core during the processing process, but the existing iron core Due to the relatively small bonding strength between layers, fragments and cracks often appear during cutting processing, resulting in the scrapping of the iron core and a great waste of materials, and the insulation effect between the layers of the iron core is not very prominent , during transportation and long-term use, due to bumps and collisions, the insulating material between the layers will fall off, and the insulating ability will be lost, which will bring serious safety hazards