Three-phase wound core and three phase transformer

Abstract

In order to solve the problem in making large triphase with wound iron core to need many making steps and large equipment, the present invention has the large triphase iron core split into relatively short and light parts. The triphase wound iron core of the present invention includes one first inner iron core, one second inner iron core and one rectangular outer iron core outside the inner iron cores. The first inner iron core and the second inner iron core are jointed in some jointing point, the outer iron core is further split into several parts, and all the inner iron cores and the outer iron cores parts are jointed to form the triphase wound iron core.

Description

technical field [0001] The present invention relates to static induction equipment such as a three-phase transformer using a three-phase wound core made of silicon steel sheet. Background technique [0002] As cores for three-phase transformers, laminated cores and wound cores are known, and laminated cores are suitable for larger-sized transformers. Such as Figure 7 As shown, the laminated core is composed of coil leg parts 1a to 1c and yoke parts 2a and 2b, and the joint parts of each part are butted at a cut angle of 45°. In the case of the three-phase laminated core, there are six butt joints 3d, and the joint shape has a great influence on the characteristics, and the fewer the joints, the better the properties are. Also, since the flux flow in the transformer is such that there is little flux flow outside the core, it is wasteful to use the core at the corners. In the manufacturing process of the laminated core, there are many kinds of shapes of the upper yoke part ...

AI Technical Summary

Problems solved by technology

[0013] Reducing the size of a wound core is an effective method for downsizing a large static induction device, but it leads to an increase in the number of manufacturing processes and an increase in the size of the manufacturing facility

Images