Commonly used power sources in electroplating production

Power Supply
The commonly used power sources in electroplating production include rectifiers and DC generators, and various current waveforms can be obtained based on the number of phases of the AC power supply and the different rectifier circuits. For example, single-phase half wave, single-phase full wave, three-phase half wave, and three-phase full wave. Practice has shown that the waveform of current has an impact on the crystal structure, brightness, dispersion and coverage ability of the plating solution, alloy composition, and additive consumption of the coating. Therefore, the selection of current waveform should be given attention. In addition to using ordinary direct current, periodic commutation current and pulse current can also be used according to actual needs.
Power composition
The main circuit mainly includes the main transformer, power rectifier devices, and some detection and protection devices. The main transformer in the electroplating power supply is used to reduce the AC power supply voltage to the voltage required for the electroplating process. The thyristor rectifier uses a power frequency (50Hz) transformer, while the high-frequency switching power supply uses a high-frequency (10-50kHz) transformer. The detection device includes voltmeter, current transformer, etc. The protection device is mainly used for overcurrent protection of power rectifier devices.
The control circuit mainly includes trigger control circuits for thyristors or IGBTs, soft start circuits for power supplies, overcurrent and overvoltage protection circuits, and phase loss protection circuits for power supplies.
Power characteristics
1. Good energy-saving effect
Due to the use of high-frequency transformers, the conversion efficiency of the switching power supply is greatly improved. Under normal circumstances, the efficiency is increased by more than 10% compared to thyristor equipment. When the load rate reaches below 70%, the efficiency is increased by more than 30% compared to thyristor equipment.
2. High output stability
Due to the fast response speed (microsecond level) of the system, it has strong adaptability to changes in grid power and load, and the output accuracy can be better than 1%. The switching power supply has high work efficiency and control accuracy, which is beneficial for improving product quality.
3. The output waveform is easy to modulate
Due to its high working frequency, its output waveform adjustment has a relatively low processing cost, making it easier to change the output waveform according to user process requirements. This has a strong effect on improving work efficiency and improving the quality of processed products at the workplace.
4. Small size and light weight
The volume and weight of the thyristor electroplating power supply are 1/5-1/10 of that, making it easy to plan, expand, move, maintain, and install.