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How to Find Faults in High Frequency Transformer Skeleton Short Circuit
Mar 19, 2018

   How to Find Faults in High Frequency Transformer Skeleton Short Circuit

High-frequency transformers are power transformers whose operating frequency exceeds mid-frequency (10kHz). They are mainly used as high-frequency switching power transformers in high-frequency switching power supplies, and also used in high-frequency inverter power supplies and high-frequency inverter welding machines for high-frequency inverters. Transform the power transformer. There are many kinds of high-frequency transformer skeletons, such as EE type, EF type, EFD type, PQ type, etc. To say its specifications, the more common ones are 5+5pin, 6+6pin and so on.

The application of high frequency transformer skeleton is extremely extensive. Transformers are used in almost every electronic product. Its principle is simple, but it is based on different occasions (not the same use) Transformer winding technology will have different needs. How to deal with short-circuit transformer skeleton end. Which of the first things to consider when faced with a problem?

First and foremost, the inspection and experiment after the short-circuit fault of the transformer accessories. When the transformer skeleton suffers a sudden short circuit, the most likely to be deformed is the low voltage winding and the balance winding, followed by the high and medium voltage windings, the iron core, and the clip. Therefore, after the short-circuit event of the transformer skeleton is mainly viewed windings, iron cores, clamps and other parts.

First, the winding view and experiment

Because the transformer skeleton is short-circuited, under the effect of electromotive force, the windings are subjected to various force effects such as pressure, pulling, twisting, and the like, and the formed faults are relatively invisible and are not easy to view and correct, so short-circuit faults should be Points to look at the winding situation.

Second, the core and clips view

The core of the transformer skeleton should have a satisfactory mechanical strength. The mechanical strength of the iron core is ensured by the strength of the clamping elements on the iron core and their connections. When the windings generate electric power, the axial force of the windings will be offset by the counter effect of the clamps. If the strength of the clamps and pull plates is less than the axial force, the clamps, pull plates and windings will be damaged.


Therefore, you should carefully look at the core, clamps, pull plates and their connections. The transformer skeleton is a device that changes the communication voltage, current, and impedance. When there is a communication current in the primary coil, a flux is generated in the core (or core), and a voltage (or current) is induced in the secondary coil. The basic principle of the transformer skeleton is the principle of electromagnetic induction. Transformer skeleton --- Using electromagnetic induction principle, an electric appliance that transfers electric energy from one circuit to another circuit or transmits signals is an important component of electric energy transmission or signal transmission.

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