Planar transformer, electronic equipment and production method of planar transformer

Abstract

The invention relates to the technical field of planar transformers, in particular to a planar transformer, electronic equipment and a production method of the planar transformer. The planar transformer comprises a first magnetic core, at least one PCB (printed circuit board) winding, at least one pancake coil and a second magnetic core. The first magnetic core, all the PCB windings, all the pancake coils and the second magnetic cores are coaxially assembled into the planar transformer. On the one hand, a primary / secondary coil formed by the PCB windings and the pancake coils has higher overcurrent capability compared with the traditional winding coil; on the other hand, when the primary / secondary coil with more turns is required to be designed, the number of the turns of the pancake coilscan be increased / decreased transversely, the assembling of multiple layers of the primary / secondary coils can be relatively avoided; a proximity effect and stray capacitance are further reduced; thepower density is increased; and a temperature rise is reduced.

Description

technical field [0001] The invention relates to the technical field of planar transformers, in particular to a planar transformer, electronic equipment and a manufacturing method of the planar transformer. Background technique [0002] The transformer uses the principle of electromagnetic induction to realize the conversion of voltage. A transformer includes a primary coil, a secondary coil, and a magnetic core. Generally, users can adjust the number of turns of the primary coil or secondary coil to form a transformer according to product requirements. For example, see figure 1 , figure 1 It is a schematic diagram of the principle of a planar transformer provided by traditional technology. Such as figure 1 As shown, the user constructs a planar transformer by arranging multiple layers of primary coils and secondary coils alternately. [0003] In the process of realizing the present invention, the inventor found that the traditional technology has at least the following ...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor found that the traditional technology has at least the following problems: due to the large number of layers of primary / secondary coils, the proximity effect is relatively large, and the parasitic capacitance of the planar transformer is also increased, resulting in the power of the planar transformer low density, low efficiency

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