Transformer for switch power supply design

Abstract

The invention discloses a transformer for switch power supply design to solve the problems that the interlayer capacitance of windings of a transformer in switch power supply design is large, the isolation voltage resistance is low, the production process is complicated and the production cost is high. A framework of the transformer adopts a sleeve structure, wherein multiple isolation troughs are formed in the inner-layer sleeve framework, the outer isolation troughs are primary windings, and the separation troughs can reduce interlayer capacitance and voltage between lines; the inner isolation groove is an auxiliary winding; a power supply feedback winding winds around the outsides of the primary windings after being isolated by an insulating adhesive tape, so that strong coupling between the feedback winding and the primary windings can be realized; multiple isolation troughs are formed in the outer-layer sleeve framework, the inner isolation trough is a secondary winding coil, the outer isolation troughs can increase the creepage distance between the primary windings and the secondary winding, and accordingly, the isolation voltage resistance requirement of a primary coil and a second coil can be met better.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of switching power supply design, and in particular relates to a transformer used for switching power supply design. [0003] Background technique: [0004] In the design of switching power supply, due to the limitation of the volume of switching power supply and the requirement of isolation and withstand voltage of strong and weak currents, traditional switching power supply transformer windings are isolated by insulating tape. There are problems such as large capacitance between coil layers, complex production process, and high production cost. The transformer of the present invention can solve the problem of large interlayer capacitance through the design of the slotted sleeve of the transformer skeleton, reduce complex production processes, and greatly reduce production costs. [0005] Invention content: [0006] The purpose of the present invention is to provide a transformer for switching powe...

AI Technical Summary

Problems solved by technology

There are problems such as large capacitance between coil layers, complex production process, and high production cost