An adjustable power supply refers to the input AC power supply that is converted into DC power after rectification and filtering and then converted into high-frequency AC power to be provided to the transformer for transformation, thereby generating the required set or sets of voltages.
What is electrolysis of water?
Water is an inorganic substance composed of two elements, oxygen and hydrogen. After electricity is applied to water, it can be decomposed into oxygen and hydrogen. The positive electrode produces oxygen and the negative electrode produces hydrogen. Their volume ratio is 1:2. Generally, in order to enhance the electrolysis of water, a small amount of dilute sulfuric acid, sodium hydroxide solution, etc. will be added to the water.
Why is an adjustable power supply used for electrolysis of water?
The main reason for using an adjustable dc power supply for electrolysis of water is that during the electrolysis process, it is hoped that the power supply output current is constant and not affected by other factors, so that the gas produced per minute by electrolysis of water remains constant. The resistivity of different water will be different. The resistivity of pure water is 18.3 megohm-cm and tap water is generally 800-8000 ohms. The purer the water, the greater the resistivity. But no matter what kind of water, the temperature will rise during the electrolysis process, and once the temperature rises, the resistance of the water will become smaller (the conductivity of water depends on the impurity ions in the water and the H+OH- ions ionized by water. When the temperature is high, the ion movement speed will be faster, and the migration speed in the electric field is large, and the resistance is small).
According to Ohm's law I=UIR, when the load voltage changes, if the output current is to be kept constant, the output voltage of the power supply must change with the change of the load resistance, so an adjustable ac dc power supplies must be used to achieve it. Of course, if there is no requirement for the electrolysis speed per minute, there is no need for constant current, and a voltage-stabilized switching power supply can also achieve it, or even a battery can be used directly.
The extended function of adjustable power supply in water electrolysis
The adjustable power supply can set the output current size according to actual needs because the output voltage and current are continuously adjustable. For example, it takes 2 hours to electrolyze water with a current of 10A. If I need to electrolyze the same volume of water in 1 hour, the current of the adjustable power supply can be adjusted to 15A constant output.
Other applications of dc power supply
1. LED dimming: The brightness of LED lamps can be easily changed by adjusting the output voltage of the adjustable switching power supply;
2. Industrial control: Motor speed regulation, punch control, etc. can all be achieved directly by adjusting the adjustable switching power supply.
