Why is Amorphous Alloy dry-type transformer noisy?

As the magnetostriction of Amorphous Alloy core is larger than that of conventional silicon steel sheet, the vibration noise of Amorphous Alloy core is larger than that of conventional silicon steel sheet transformer. With the increase of 0.02 t, the noise of the product is increased by about 1DB. Under the same conditions, the noise of the finished product can be reduced by about 2 DB with 5 ~ 8% of no-load loss and excitation power energy of the 15-piece sector lap joints compared with the 30-piece in-line lap Amorphous metal transformer.

Why is Amorphous Alloy dry-type transformer noisy? The method to reduce the noise of Amorphous Alloy dry-type transformer is to fill the silicon rubber plate around the clamp and the core to reduce the vibration and noise. After the base is installed, the noise energy of Amorphous Alloy dry-type transformer will be 1 ~ 3 DB, and the effect of noise reduction is good. Optimize the assembly process, can reduce the noise: 1) the Amorphous Alloy iron core should be handled gently in the process of handling and transfer, to avoid the iron core by stress and Brittle crack, open the iron core packaging, lifting the iron core to push to install before the table, can use a brush in the core seam side spread some transformer oil, make it penetrate into the core plate seam, can play the role of bonding iron plate together, bonded iron plate toughness enhancement, easy to open the plate operation. Non-crystal Alloy dry-type transformer, Amorphous metal transformer noise 2) the non-crystal Alloy iron core is lifted and placed on the push-install platform by magnetic suspension, open the seam of the iron core, and protect the open iron core with the protective cardboard, so as to avoid pushing the iron core into the coil, and can collect the fragments of the iron core when opening the piece. 3) the high and low voltage coils shall be laid on the Assembly table through the fixture positioning installation set, the three-phase coils shall be aligned horizontally, the high and low voltage coils shall be aligned, and Silicon Rubber Strip and epoxy plate shall be used to support and position the coils. 4) after the high and low voltage coils are positioned on the assembly table and the core is positioned on the push assembly table, the core push coil can be started. The three-phase five-post Amorphous Alloy dry-type transformer is of four-frame and five-post structure. The four-frame cores are pushed independently, but in the push process, the height of the two adjacent frames should be the same, and should be close together. The gap between the core and the coil should be screened with silicon rubber strip and epoxy plate to make it compact. For large capacity products, iron cross-section larger, often using two-layer core stack, should be pushed to install the lower layer of iron core, alignment support tight, and seal the seam and then push to install the upper layer of iron core. 5) after the core is pushed into the coil, when it is in place, the gasket block and the epoxy support plate are assembled, and then the core is sealed. The core is sealed by assembling the open seam in the same position as before opening, and the side of the seam is sealed with silicone sealant. Finally, the core is sealed with silicon steel sheet. In the process of packaging, special attention should be paid to the stitching technique to avoid the breakage of the Amorphous Alloy Strip and to ensure the stitching in place. As the magnetostriction of Amorphous Alloy core is larger than that of conventional silicon steel sheet, the vibration noise of Amorphous Alloy core is larger than that of conventional silicon steel sheet transformer. With the increase of 0.02 t, the noise of the product is increased by about 1DB. Under the same conditions, the noise of the finished product can be reduced by about 2 DB with 5 ~ 8% of no-load loss and excitation power energy of the 15-piece sector lap joints compared with the 30-piece in-line lap Amorphous metal transformer. 6) after the core is sealed, the clamp is assembled in place, and the amorphous alloy core is packaged as a whole. The main force is exerted on the clamp, the supporting epoxy board, and the whole Assembly of the device body is completed. 7) after the whole body assembly is completed, the transformer is hoisted to the turntable, and the whole body can be turned over and stand up after the tie-down, for further assembly of the factory accessories.