Noise-reducing transformer iron core structure and manufacturing method thereof

Abstract

The invention discloses a noise-reducing transformer iron core structure and a manufacturing method thereof. The transformer iron core structure is formed by lapping a plurality of silicon steel sheets, and magneto-rheological glue is filled in gaps of adjacent silicon steel sheet laminations lapped at corners of the transformer iron core structure. According to the noise-reducing transformer ironcore structure, the magneto-rheological glue is filled in the lamination gaps of the adjacent silicon steel sheets, part of the magnetic induction lines can pass through the magneto-rheological gluein the lamination gaps due to the magnetic conductivity of the magneto-rheological glue, and compared with the situation that air exists in the lamination gaps, the magnetic lines of force are distributed in the lamination gaps more smoothly; therefore, the magnetic density of the leakage magnetic field around the lamination gap is reduced, the electromagnetic force between the silicon steel sheets is reduced, and the vibration noise between the silicon steel sheet laminations caused by the electromagnetic force is reduced. Meanwhile, due to the damping characteristic of the magneto-rheological glue, part of vibration energy is consumed, and therefore the effects of damping and reducing vibration noise are further achieved.

Description

technical field

[0001] The invention relates to a transformer capable of reducing noise, in particular to a transformer core structure and a manufacturing method for reducing noise at gaps of transformer core laminations. Background technique

[0002] The transformer core is made of overlapping silicon steel sheets. There is an air gap at the overlapping silicon steel sheets. Because the reluctance of the air gap is very large, when the magnetic flux passes through the air gap, it does not directly pass through the air gap, but flows from the adjacent silicon steel sheets. Detour, resulting in magnetic flux leakage, the existence of leakage magnetic field causes the increase of electromagnetic force between adjacent silicon steel sheets, aggravates the electromagnetic vibration between silicon steel sheets, the air gap at the joint of transformer core is the main cause of transformer no-load loss and vibration noise .

[0003] In recent years, by using high-quality ferromag...

Images