Principle and function of pulse power supply

Definition of pulse power supply

        The user's load needs to be powered on intermittently, that is, according to a certain time rule, the load is powered on for a certain time, and then powered off for a certain time, and one on and off forms a cycle. This repeated execution constitutes a pulse power supply.

        For example, in the aging process of non-polar electrolytic capacitors, it is necessary to charge the capacitor forward for a period of time, then discharge it, and then charge the capacitor in the reverse direction for a period of time, and then discharge it, so that forward → discharge (power off) → reverse → discharge → forward..., and so on.

Ⅰ. Single pulse power supply

        Single pulse power supply generally outputs unidirectional pulse current with fixed parameters. If you want to change the pulse parameters, you need to stop the machine and reset them.

Ⅱ. Double pulse power supply

        Double pulse power supply generally outputs periodic commutation pulse current with fixed parameters. If you want to change the pulse parameters, you need to stop the machine and reset them.

        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 use of high pulse current density in the subsequent cathode cycle, so the coating is dense, bright and has low porosity.

        The anodic stripping of the reverse pulse of the double pulse power supply greatly reduces the attachment of organic impurities (including brightener) in the coating, so the coating has high purity and strong anti-discoloration ability.

        IPS-ATDJ20KV-10kHz intelligent pulse electroplating power supply provides a powerful means for the research and development and production of nano-electroplating technology

Principle of pulse power supply technology

        During the pulse electroplating process, when the current is turned on, the pulse (peak) current is equivalent to several times or even dozens of times the ordinary DC current. It is this instantaneous high current density that reduces the metal ions under extremely high overpotential, thereby making the deposited layer grains finer;

        When the current is turned off, the discharge ions near the cathode area return to the initial concentration, and the concentration polarization is eliminated, which is conducive to the next pulse to continue to use high pulse (peak) current density in the same period. At the same time, the off period is also accompanied by recrystallization, adsorption and desorption, which are beneficial to the deposited layer.

        Such a process runs through the entire electroplating process synchronously, and the mechanism contained therein constitutes the most basic principle of pulse electroplating. Practice has proved that pulse power supply has incomparable advantages over traditional DC electroplating in terms of refining crystallization, improving the physical and chemical properties of the coating, and saving precious metals.

        First, the primary energy source has enough energy after slow energy storage; then it charges (or flows into energy) the intermediate energy storage and pulse forming system. After some complex processes such as storage, compression, pulse formation or conversion, the energy is finally discharged quickly to the load.

The role of pulse power supply technology

①Increase the pulse repetition frequency: By increasing the pulse repetition frequency, not only the average power of the pulse power supply is increased, but also the volume of the power supply is reduced and the cost is reduced.

②Improve the power supply efficiency: and reduce the energy consumption of the power supply itself.

③Improve the reliability of the power supply system: Pulse discharge heat generation and high-frequency electromagnetic interference have a serious impact on the reliability of the system.

High-frequency pulse electroplating power supply

        Pulse power supply is superior to traditional electroplating power supply and is the development direction of electroplating power supply.

        When the pulse power supply is used for electroplating gold, silver, nickel, tin, and alloys, the functionality of the coating can be significantly improved; when used for protective-decorative electroplating (such as decorative gold), the coating can be made uniform in color, bright, and corrosion-resistant; when used for precious metal purification, the purity of the precious metal is higher.

        Double-pulse power supply is more delicate and has better finish than single-pulse power supply. The anodic dissolution of the reverse pulse of the double-pulse power supply causes the metal ion concentration on the cathode surface to rise rapidly, which is conducive to the use of high pulse current density in the subsequent cathode cycle, so the coating is dense, bright, and has low porosity;

         The anodic stripping of the reverse pulse of the double-pulse power supply greatly reduces the attachment of organic impurities (including brighteners) in the coating, so the coating has high purity and strong anti-discoloration ability.

        Double pulse power supply is suitable for electroplating of gold, silver, rare metals, nickel, zinc, tin, chromium and alloys; electroforming of copper, nickel, etc.; electrolytic capacitor application; anodizing of aluminum, titanium and other products; electrolytic polishing of precision parts.