A circuit and method for eliminating eddy current of high-frequency switching power supply of electrolytic copper foil surface treatment machine

Abstract

In the present invention, by changing the parameters of the three-type error amplifier inside the high-frequency switching power supply, C2 is 0.22UF, and the frequency of the initial pole and the first pole is reduced to twice that of the previous one, so that the DC power supply and the electrolytic copper foil post-processing winding control system The matching is more stable; and the absorption of eddy current is achieved by connecting an LC smoothing network at the output of the DC power supply, and the purpose of eliminating eddy current is achieved through the above two methods, and the surface treatment machine is solved from the control of circuit parameters and the absorption of eddy current. The problem of heating of the bearing seat of the conductive roller effectively avoids the phenomenon of heating and damage to the bearing seat caused by eddy current, improves the stability of the equipment, and thus stabilizes the quality of the copper foil product.

Description

technical field [0001] The invention relates to a circuit and a method for eliminating eddy currents, in particular to a circuit and a method for eliminating eddy currents in a high-frequency switching power supply of an electrolytic copper foil surface treatment machine. Background technique [0002] In recent years, the rectifier power supply in the electrolytic copper foil industry has gradually replaced the thyristor power supply with high-frequency switching power supply. The biggest advantage of this power supply is its high efficiency and good energy-saving effect. However, there are problems such as electromagnetic interference, harmonic pollution, and eddy current in the use of high-frequency switches. Generally, the electromagnetic interference is reduced or eliminated by adding a filter at the input end, and the harmonic pollution is reduced or eliminated by centralized processing. But there is no better treatment method for the eddy current phenomenon. [0003]...

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Problems solved by technology

[0004] At present, the conventional method to deal with this problem is: on the one hand, by increasing the cooling water of the conductive roller, cooling the conductive roller from the outside, thereby taking away the temperature of the bearing seat, and cooling the bearing seat, but this method cannot completely eliminate the eddy current At the same time, the volume of the processor becomes large; on the other hand, by replacing the bearing seat in time, more losses caused by equipment damage can be avoided, but this method significantly increases the cost of production and maintenance

Since these two methods cannot fundamentally eliminate the hidden danger of eddy current, the quality of copper foil products cannot be guaranteed

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