Pancake coil wound three-phase transformer

Abstract

The invention discloses a pancake coil wound three-phase transformer, which comprises an iron core and windings, wherein each winding comprises a primary winding and a secondary winding; the primary winding of each winding comprises a plurality of pancake primary coils; the secondary winding of each winding comprises a plurality of pancake secondary coils which are the same as the pancake primary coils of each winding in number; each single pancake secondary coil of each winding is adjacent to the corresponding single pancake primary coil to form a branch winding; and the pancake primary coils of the branch windings of each winding are adjacent to one another. The pancake coils are superposed, a clearance is formed between each two adjacent pancake coils, and a magnetic leakage sheet is clamped between the pancake secondary coil and the pancake primary coil of each branch winding. Therefore, the pancake coil of the pancake coil wound three-phase transformer has the characteristics of small intermediate diameter, material conservation and the like, effectively improves electric density, shortens the whole volume, and has good ventilation and heat dissipation performance; and furthermore, the leakage inductance is adjusted by the magnetic leakage sheet, so that the process is convenient to operate and easy to control and a relatively large leakage inductance is obtained by a relatively small magnetic branch.

Description

technical field [0001] The invention relates to the technology in the field of transformers, in particular to a pie-shaped coil wound three-phase transformer. Background technique [0002] In electrical equipment and wireless circuits, transformers are often used as step-down voltages. Transformers are devices that use the principle of electromagnetic induction to change AC voltage. [0003] A traditional three-phase transformer includes an iron core with three iron core legs and a plurality of transverse pieces and a winding on each iron core leg. The winding includes a primary winding and a secondary winding, usually the primary winding and the The secondary windings are all cylindrical coils, which have many defects in production and practical application, for example, the overall volume is large, the space is large, and it is not easy to arrange; the heat dissipation is difficult, which is not conducive to maintaining the performance of the coil; And, the leakage induct...

AI Technical Summary

Problems solved by technology

[0003] A traditional three-phase transformer includes an iron core with three iron core legs and a plurality of transverse pieces and a winding on each iron core leg. The winding includes a primary winding and a secondary winding, usually the primary winding and the The secondary windings are all cylindrical coils, which have many defects in production and practical application, for example, the overall volume is large, the space is large, and it is not easy to arrange; the heat dissipation is difficult, which is not conducive to maintaining the performance of the coil; And, the leakage inductance of the three-phase transformer in traditional technology is not easy to control

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