Open wound-core transformer manufacturing method and device adopting same

Abstract

Provided are an open wound-core transformer manufacturing method and a device adopting the same. The open wound-core transformer manufacturing method comprises the steps that 1, a belt body is cut into an elongated belt body; 2, gaps are formed in the cut belt body through cutting and are provided with connecting points for belt body connection; 3, the belt body provided with the cut gaps is wound to form a wound core, annealing is performed, then the outside of the wound core is coated with resin through brushing, the gaps break open after curing, or the belt body provided with the cut gaps is wound to form a wound core, annealing is performed after the gaps break open, and then the outside of the wound core is coated with resin through brushing and cured; 4, a coil is installed at the open position, and then the gap positions are closed up to form a finished product. The open wound-core transformer manufacturing method has the advantages that the belt body connection is achieved through the connecting points, winding of the belt body is facilitated, belt body breakage from the gap positions is also facilitated, the coil can be conveniently arranged on a silicon steel core column in a sleeving mode, a special winding machine added for the wound core is omitted, the efficiency is improved, the cost is saved, the belt body is only provided with one or two cuts, and power loss is small.

Description

technical field [0001] The invention relates to a manufacturing method and equipment for an open wound core transformer. Background technique [0002] The iron core is the main component of the transformer. The electromagnetic performance of the transformer depends to a large extent on the core structure. The iron core for conventional transformers is made of silicon steel sheets. Although the iron core of this structure is less difficult to produce, it is easy to install with coils. However, the iron core with alternate flat lamination structure has also exposed some problems in actual use. First, each layer of the iron core is composed of multiple silicon steel sheets alternately stacked flat. There are at least four to six butt joints in this structure, and the butt joints are in There is actually a kind of air gap in the magnetic circuit, too much air gap directly increases the reluctance of the magnetic circuit. Secondly, the magnetic circuit and the high magnetic perm...

AI Technical Summary

Problems solved by technology

The closed core structure avoids the shortcomings of the alternating flat lamination structure. There is no air gap in the structure, and the magnetic circuit and the wound strip can have the same high magnetic permeability direction. However, the closed core is more difficult to manufacture than the alternating The flat stack structure is much larger, especially the coil is directly wound on the iron core. In addition to directly increasing the supporting requirements of production equipment, the production efficiency is also low, so the application is limited.

[0003] The publication number is CN104835630A, and the name is folded combined wound iron core, which discloses a pre-cut male iron core and female iron core, and then inserting the male iron core and the female iron core to form a pair of wound iron cores. The problem is that it needs to be cut now and then each layer of silicon steel sheet of the male iron core and the female iron core should be shaped separately, which has the disadvantages of laborious, slow efficiency and difficult length control

[0004] The publication number is CN1897176A, and the name is a segmented wound core manufacturing method, which adopts the method of first rolling the strip body into a core frame, then bonding the strip body layers into a block entity, and then breaking it open. This method exists The problem is that one is difficult to cut, and the other is that if the cut is flat, it is easy to cause a short circuit compared with the stepping lap loss.

[0005] In addition, the coil winding of the winding core needs to be wound with new special equipment. Most manufacturers who have purchased the manufacturing equipment of the row core, the original equipment is also facing the situation of being eliminated or idle, resulting in a lot of waste.

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