The function of the DC switching power supply is to convert the original ecological power supply (coarse power) with poor power quality, such as battery power, into a high-quality direct current (fine power) that meets the requirements of the equipment. The core of the DC switching power supply is the DC/DC converter. Therefore, the classification of DC switching power supplies depends on the classification of DC/DC converters. That is to say, the classification of DC switching power supplies is basically the same as that of DC/DC converters, and the classification of DC/DC converters is basically the classification of DC switching power supplies.
Application characteristics：
1. Reduce porosity, the formation speed of crystal nucleus is faster than the growth rate, which promotes the refinement of crystal nucleus.
2. Improve the bonding force and make the passivation film break down, which is conducive to the firm bond between the substrate and the plating layer.
3. Improve the coverage and dispersion ability. The high negative potential of the cathode allows the passivated parts of ordinary electroplating to be deposited, and slows down the “scorching” and “dendritic” of the protruding parts of the complicated parts due to excessive consumption of deposited ions. The deposited defects can be reduced to 1/3~1/2 of the original thickness for obtaining a given characteristic of the coating (such as color, no porosity, etc.), saving raw materials.
4. Reduce the internal stress of the coating, improve lattice defects, impurities, voids, tumors, etc., easily obtain crack-free coatings, and reduce additives.
5. It is beneficial to obtain alloy coating with stable composition.
6. Improve the dissolution of anode, without anode activator.
7. Improve the mechanical and physical properties of the coating, such as increasing the density, reducing the surface resistance and volume resistance, improving toughness, wear resistance, and corrosion resistance, and controlling the hardness of the coating.
Its application is mainly used in industry and some household appliances, such as televisions, computers, etc,mobile phone charger. The DC switching power supply is to conduct high-speed turn-on and cut-off through the circuit control of the switching tube. The DC circuit is converted into high-frequency AC power and supplied to the transformer for transformation, thereby generating the required one or more sets of voltages. The reason for the conversion to high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer in the transformer circuit is much higher than that of 50HZ. Therefore, the switching transformer can be made very small, and it is not very hot during operation, and the cost is low. If you don’t change 50HZ to high frequency, the switching power supply is meaningless.
Post time: Dec-01-2021