The role of transformer skeleton

(1) Provide space for winding copper wires in transformers

(2) Fix the magnetic core in the transformer.

(3) The wire groove in the skeleton provides a path for passing through the wire during the production of winding for transformers.

(4) The metal pins in the skeleton are the pillars wrapped with copper wires of the transformer; After soldering, it is connected to the PCB board and plays a conductive role during transformer operation.

(5) The retaining wall at the bottom of the skeleton can fix the transformer and PCB board; Provide a certain distance space for the tin stack and PCB board, as well as the magnetic core and PCB board generated during soldering;

Isolate the magnetic core from the tin stack to avoid poor voltage resistance.

(6) The protrusions, indentations, or chamfers in the skeleton can determine the placement direction or pin order of the transformer during use.

Classification of Transformer Skeletons

The skeleton is generally classified according to the type of magnetic core (or iron core) used in transformers, including EI, EE, EF, EPC, ER, RM, PQ, UU, etc. Each model can be distinguished by the size of the magnetic core (or iron core), such as EE5, EE8, EE13, EE19, and other models of different sizes. Skeletons are divided into two types based on their shape: vertical and horizontal; According to the operating frequency of transformers, they can be divided into two types: high-frequency skeleton and low-frequency skeleton. The frequency referred to here does not refer to the number of times it is used, but to the number of times the transformer undergoes periodic changes during operation. The unit is Hertz (Hz), abbreviated as Hertz, which is also commonly used as kilohertz (kHz), megahertz (MHz), or GHz; According to the nature of the stitch usage of the skeleton, it can be further divided into two types: traditional skeleton (DIP) and patch skeleton (SMD).