How to find the fault of high frequency transformer skeleton short circuit
The high-frequency transformer is a power transformer with a working frequency exceeding the intermediate frequency(10 kHz).It is mainly used for high-frequency switching power supply transformers in high-frequency switching power supplies,and also for high-frequency inverters in high-frequency inverter power supplies and high-frequency inverter welding machines.Variable power transformer.There are many types of high-frequency transformer skeletons,such as EE type,EF type,EFD,PQ,etc.To say its specifications,the more common are 5+5pin,6+6pin and so on.
The application of high frequency transformer skeletons is extremely extensive.The transformer is used in all electronic products.Its principle is simple but it depends on different applications(different uses).The winding technology of the transformer will have different requirements.How to deal with the short circuit of the transformer skeleton.What should be considered first when encountering a problem.
First,the transformer accessories are short-circuited after viewing and experimenting.When the transformer skeleton is subjected to a sudden short circuit,the most likely deformation is the low voltage winding and the balanced winding,followed by the high and medium voltage windings,the iron core and the clamp.Therefore,the view after the short-circuit of the transformer skeleton is mainly to view the windings,the iron core,the clamps and other parts.
First,the winding view and experiment
Because the transformer skeleton is short-circuited,under the effect of electric power,the windings are subjected to various forces such as pressing,pulling,and tortuosity.The formed faults are strong and difficult to view and correct,so the short-circuit should be Point to see the windings.
Second,the core and clip view
The core of the transformer frame should have a mechanical strength that is satisfactory.The mechanical strength of the core is ensured by the strength of all the clamping members on the core and its connections.When the winding generates electric power,the axial force of the winding will be offset by the counter-effect force of the clamp.If the strength of the clamp and the pull plate is less than the axial force,the clamp,the pull plate and the winding will be damaged.
Therefore,the iron core,the clamps,the pull plates and their connectors should be carefully observed.The transformer skeleton is a device for changing the voltage,current and impedance.When a communication current is passed through the primary coil,a communication flux is generated in the iron core(or core)to induce a voltage(or current)in the secondary coil.The basic principle of the transformer skeleton is the principle of electromagnetic induction.Transformer skeleton---An electrical appliance that uses the principle of electromagnetic induction to transfer electrical energy from one circuit to another or to transmit signals is an important component of electrical energy transfer or as a signal transmission.