Adjustable common-mode transformer and common-mode adjusting method thereof

Abstract

The invention discloses an adjustable common-mode transformer which comprises a framework, a magnetic core, at least one primary winding, at least one shielding layer winding and at least one secondary winding. The magnetic core is installed on the framework. The primary winding, the shielding layer winding and the secondary winding are wound on the framework layer by layer according to design requirements; the shielding layer winding comprises at least two sections of coils; and the adjacent coils are connected through taps. According to the adjustable common-mode transformer and the common-mode adjusting method thereof, by cutting the taps between winding coils of the shielding layer, the area and the shielding position of the shielding layer winding are adjusted by adjusting the common-mode value of the transformer such that the common-mode value of the transformer with the common-mode value deviating to a negative value or a positive value reaches a specified range, all transformers with poor common-mode values do not need to be scrapped, the production cost is saved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of transformer common mode, in particular to a transformer with adjustable common mode and a common mode adjustment method thereof. Background technique [0002] The transformer uses the principle of electromagnetic induction to realize voltage conversion and energy transmission device. The input terminal of the actual high-frequency transformer is a rectified DC square wave. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. [0003] The problem of poor common mode often occurs during the use of existing transformers, which leads to many problems. At present, the usual solution is to change the area of ​​the shielding layer and the thickness of the insulating layer when making test samples. Common mode value, so that ...

AI Technical Summary

Problems solved by technology

However, even if the common mode value of samples of the same type meets the requirements, in mass production, because the tightness or density of each transformer shielding layer and insulation layer winding is different, it is easy to cause the common mode value of the mass-produced transformers to be different. Transformers with bad value and bad common mode value can only be scrapped, resulting in a waste of resources

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