Noise reduction method of high-performance silicon
Reduce the magnetic flux density of the iron core: Although reducing the magnetic flux density of the iron core can reduce the noise of the transformer, it is necessary to increase the cross-sectional area of the iron core, which leads to an increase in the weight of the transformer, which offsets the effect of noise reduction, and also increases the cost of the transformer. The reduction of the magnetic flux density of the iron core is limited to 80% reduction.
Use silicon steel sheet with small magnetic distortion: use high-permeability (HI-B) directional silicon steel sheet, the noise can be reduced by about 2 to 4dB; if you use laser-treated high-directivity (ZDKH) silicon steel sheet, it can be greater Reduce noise.
Make the iron core binding force uniform: In the process of assembling the iron core, do not subject the iron core to local stress and cause deterioration of its characteristics. When using the binding belt to tighten the iron core, it is advisable to make the binding force of each part uniform.
Improve iron core seams and assembly methods: minimize the iron core seams and reduce the thickness of the seams; change the iron core stacking method to ladder lap, which has a great effect on improving the noise of the transformer.