Where does the noise from the dry-type transformer come from

     In many courts, there are also more cases of disturbing people by dry-type transformers. For disturbing people by dry-type transformers, there is a lot of noise, which affects the normal operation of dry-type transformers, for the function of the dry-type transformer is also a great interference, for the dry-type transformer noise is a more important and a more common phenomenon. How does the noise of dry-type transformer come? Why is there noise? We then analyze: specifically, the dry-type transformer noise has three sources, one is the core, two is the winding, three is the cooler, that is, no-load, load and cooling system led to the sum of noise. The noise of the iron core is caused by the small change of magnetoelasticity, which makes the iron core oscillate periodically with the change of excitation frequency, magnetoelastic deformation of iron core and electromagnetic force in winding, oil tank and magnetic shield. The reason for the Oscillation of the winding is the electromagnetic force in the current winding, and the leakage magnetic field can also make the structure Oscillate. The electromagnetic noise is caused by the Longitudinal Oscillation of the core laminates induced by the magnetic field. The amplitude of the Oscillation is related to the magnetic flux density in the core laminates and the magnetic properties of the core materials, but not to the load current. The electromagnetic force (and the amplitude of the Oscillation) is proportional to the square of the current, while the acoustic power of the emission is proportional to the square of the amplitude of the oscillation. I think we all know something about the noise problem of dry-type transformers. The problem of the noise of dry-type transformers must be solved and analyzed constantly. If there are problems, they must be solved, make dry-type transformer function and the operation of the smooth, for the economy and productivity of the Promotion Service!