Pulse current refers to the current with constant direction and periodic change of intensity with time, also known as pulsating current.

Pulse power supply includes single positive pulse and double positive and negative pulse power supply, which adopts unique modulation technology and digital control. The opening width (T+) of the positive pulse and the opening time width (T-) of the negative pulse can be adjusted respectively in the whole cycle. Forward current, voltage regulation, negative current and voltage can be adjusted independently.

When the current of pulse power supply is turned on, the pulse (peak) current is several times or even dozens of times that of ordinary DC current. It is this instantaneous high current density that makes metal ions reduce under extremely high overpotential, thus making the deposited grains finer. When the current is turned off, the discharge ions near the cathode region return to the initial concentration, and the concentration polarization is eliminated, which is beneficial to continue to use high pulse (peak) current density in the next pulse, accompanied by recrystallization, adsorption and desorption, and is beneficial to the deposition layer. This process runs through the whole electroplating process synchronously, and the mechanism involved constitutes the most basic principle of pulse electroplating. Practice has proved that pulse power supply has incomparable advantages over traditional DC electroplating in refining crystallization, improving physical and chemical properties of coatings and saving precious metals.

First of all, by slowly storing energy, primary energy has enough energy; Then the intermediate energy storage and pulse forming system is charged (or energy flows in), and after some complicated processes such as storage, compression, pulse forming or transformation, energy is quickly released to the load.