Pulse power supplies are available as single positive pulse and double positive and negative pulse power supplies, which are digitally controlled using unique modulation technology. Positive pulse turn-on width (T+) and negative pulse turn-on time width (T-) can be adjusted in full cycle respectively. Positive current and voltage regulation, negative current and voltage can be adjusted independently. It can satisfy the different needs of customers. Suitable for gold plating, silver plating, nickel plating, tin plating, etc., can significantly improve the performance of plating; used for protective-decorative plating (such as decorative gold), can make the plating color uniformity, good brightness, corrosion resistance. In particular, the anodic dissolution of the reverse pulse of the double-pulse power supply makes the metal ion concentration on the cathode surface rise rapidly, which is conducive to the subsequent cathodic cycle using a high pulse current density, and thus the plating layer is dense, bright, and low porosity; the anodic stripping of the reverse pulse of the double-pulse power supply reduces the adhesion of the organic impurities in the plating layer (including brightening agent), and thus the plating layer has high purity and high resistance to discoloration. Double pulse power supply is a new type of power supply, due to the reasonable processing of high-frequency pulse and low-frequency pulse, which makes the application field of switching power supply open more widely.
The basic working principle of pulse power technology
First of all, after the slow energy storage, so that the primary energy source has enough energy; and then to the intermediate energy storage and pulse forming system charging (or inflow of energy), the energy after storage, compression, pulse formation or transformation and other certain complex processes, and finally rapid discharge to the load.
Edit the main research direction of pulse power supply
◆Improve the pulse repetition frequency. By increasing the pulse repetition frequency, not only improve the average power of the pulse power supply, but also reduce the size and cost of the power supply.
◆ Improve the efficiency of the power supply and reduce the energy consumption of the power supply itself.
◆ Improve the reliability of the power supply system, pulse discharge heat generation and high-frequency electromagnetic interference on the reliability of the system has a serious impact.
Pulse power supply selection
According to the different requirements of the plating process, the choice of pulse power supply:
Ordinary plating process, the capacity of less than 3kW rectifier can choose a single-phase input power supply; while the capacity is greater than 3KW, in order to prevent the imbalance of the grid voltage, three-phase input power supply should be selected. For special plating processes with high ripple factor requirements (hard chrome plating, etc.), the continuity of the waveform is particularly important, you can choose a regulator to regulate the voltage of the silicon rectifier or increase the filter thyristor rectifier.
Special plating process also has certain requirements on the output waveform, such as a commutation, cycle commutation, unidirectional pulse, bidirectional pulse, DC superimposed pulse, DC superimposed AC and multi-segment mixed waveforms. Different output waveforms of products correspond to different uses. Power supply manufacturers specify different models for different output waveforms and applications, so you can select the type of power supply according to the desired output waveform.
Applications of Pulse Power Supplies
■Pulse power supply for electroplating gold, silver, nickel, tin, alloy, can significantly improve the functionality of the plating layer; used for protective-decorative plating (such as decorative gold), can make the plating layer uniform color, brightness, corrosion resistance.
■Pulse power supply for precious metal purification, the purity of precious metals is higher. Pulse power supply is better than traditional electroplating power supply, is the development direction of electroplating power supply.
Double pulse power supply is more detailed than single pulse power supply plating, better finish. The anodic dissolution of the reverse pulse of the double pulse power supply makes the metal ion concentration on the cathode surface rise rapidly, which is conducive to the subsequent cathodic cycle using a high pulse current density, and thus the plating layer is dense, bright, and low porosity; the anodic stripping of the reverse pulse of the double pulse power supply reduces the entrapment of the organic impurities in the plating layer (including brightening agent) greatly, and thus the plating layer is of high purity and high resistance to discoloration.
Double pulse power supply is suitable for electroplating of gold, silver, rare metals, nickel, zinc, tin, chromium and alloy, etc.; electroforming of copper, nickel, etc.; electrolytic capacitor laying energy; anodic oxidation of aluminum, titanium, etc.; electrolytic polishing of precision parts; charging of storage batteries and so on.
