Low-noise dry type arc suppression coil and method for reducing noise of arc suppression coil

Abstract

The invention relates to a low noise dry type arc suppression coil which comprises an iron core provide with not less than one air gap, an air gap backing plate, a coil, an upper cushion block, a lower cushion block, a pressing nail and a fastening bolt. A method to reduce the noise of the arc suppression coil is characterized by including the following steps: firstly, an iron core cake, an upper iron core yoke and a lower iron core yoke in an iron core stem are spliced and solidified together; secondly, the coil is sleeved on the iron core stem, and then the upper cushion block and the upper iron core yoke are placed on the iron core stem and then fastened by the fastening bolt, then reactance measurement is performed. The invention has the advantages that: firstly, not less than one holes are drilled on the air gap backing plate so as to make the air gap backing plate to be spliced and solidified with the iron core (cake) fully; secondly, the design of a beam makes the air gaps (epoxy glass-cloth laminate) evenly stressed when a machine body is fastened with the fastening bolt; thirdly, all the air gaps in the iron core stem, including the epoxy glass-cloth laminate, are solidified with the iron core effectively, thereby well limiting the noise of the dry type arc suppression coil.

Description

(1) Technical field: [0001] The invention belongs to the technical field of arc suppression coils, in particular to a low-noise dry type arc suppression coil and a method for reducing the noise of the arc suppression coil. (2) Background technology: [0002] The noise of the arc suppression coil depends on the iron core, and there are several air gaps on the iron core column of the arc suppression coil. At present, there are two known treatment methods. The first is: the air gap (epoxy glass cloth board) on the iron core column is not treated, and the iron core and the air gap (epoxy glass cloth board) are directly pressed by a drawing screw. ; The second type: stack the iron core yoke and the core column separately, and the core column (including the air gap) is cast as a whole, but there are still two air gaps between the core column and the upper and lower iron yokes that cannot be poured during assembly. The dry arc suppression coils of these two types of iron cores are noisi...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a low-noise dry-type arc-suppression coil and a method for reducing the noise of the arc-suppression coil. The disadvantage of high noise, all the air gaps in the core column, including the epoxy glass cloth board, are effectively solidified with the iron core, thus well limiting the noise in the dry arc suppression coil

Images