For operators who have just started using electroplating power supplies, they often lack a substantial understanding of basic concepts related to electroplating power supplies, such as constant voltage, constant current, Ohm's law, and the main structure of the power supply. This can lead to problems during operation. The following analysis is presented in three aspects
1. Voltage without Current, or Current without Voltage
- When the electroplating rectifier power supply is operating normally, operators should check whether the load is in good contact, and whether there are any short - circuit, open - circuit conditions, or whether it complies with specifications. In extreme cases: In a constant - voltage state, if the load wire is disconnected, the output current will be zero; in a constant - current state, if the load is short - circuited, the output voltage will be zero.
2. When Adjusting the Voltage, the No - Load Voltage Cannot Be Adjusted Upward
- Some operators turn the "current adjustment" potentiometer all the way to the left, resulting in the inability to increase the no - load voltage of the electroplating rectifier power supply. This is due to a lack of understanding of "current adjustment". Because the power supply consumes a small amount of current even when it is on no - load, and if it is adjusted to zero, no small current will be output, and naturally, the no - load voltage cannot rise. Suggestion: Generally, do not adjust the "current adjustment" to zero. Rotating it to the right by about a quarter of a turn can avoid this problem.
3. The Power Supply Has Output, but the Voltage or Current Cannot Be Adjusted Upward
- Constant - Voltage State: When the "constant - voltage" light is on, it indicates that the power supply is operating in a constant - voltage state, where the voltage is dominant and the output current is determined by the load. At this time, rotating the "current adjustment" knob to the right will not increase the current; rotating the "voltage adjustment" knob to the right will increase both the output voltage and current.
- Constant - Current State: When the "constant - current" light is on, the power supply is operating in a constant - current state, where the current is dominant and the output voltage is determined by the load. Adjusting the "current adjustment" knob will change both the output current and voltage.
In summary, it is essential to clearly understand the master - slave relationship. Adjust the current in the constant - current state and the voltage in the constant - voltage state to change the voltage and current on the load.