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How to machine a three-phase transformer core?
Aug 21, 2018

The three-phase transformer cores are usually made of transformers, which are cut into EI shapes for small transformers, and they are cut into rectangular pieces that are placed side to side for large transformers. In order to obtain a strut with a substantially circular cross section, it is recommended to use a method of machining a three-phase transformer core with an electrical steel strip with a linear slope.


By selecting the appropriate slope, a hexagonal or more circular cross section of the core strut is produced, each annular portion being filled to half the height of two pillars having a hexagonal cross section, thus forming a three phase The three pillars of the transformer. The annular portion is first wound into three identical rings from a strip of constant width with a diamond cross section comprising two 60° angles and two 120° angles. These rings constitute the base ring.


On the outside of the base ring in each annular portion, there is an outer ring having a regular triangular cross section, and the outer ring is wound by a strip having a constant width reduction. When the three annular portions are joined together, they form three hexagonal struts on which the transformer windings are wound. Such a three-phase transformer core can be easily processed and avoids material waste.

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