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The working principle and common problems of adjustable regulated DC power supply

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.15
Adjustable regulated DC power supply adjusts the voltage level of various electrical appliances according to their required voltage during operation, so that the appliances can meet the requirements of use. Due to its protective and safety functions, overvoltage and overcurrent points can be continuously set and previewed, and can be controlled and debugged according to contact switches, adjustable DC regulated power supply is currently widely used.



1.What is an adjustable and stable DC power supply?

The adjustable DC power supply adopts advanced high-frequency modulation technology internationally today. Its working principle is to expand the voltage and current capacity of switch mode power supplies to provide a wide range of voltage and current regulation, while also expanding the application range of current DC power supplies.

The control chip of DC stabilized power supply currently uses relatively mature imported components, while the power supply components use the latest high-power equipment developed in the world.

The design scheme of adjustable and stable DC power supply eliminates the bulkiness of traditional DC power supplies with power frequency transformers. Compared with traditional power sources, high-frequency DC power sources have the advantages of smaller size, lighter weight, and higher efficiency.

At the same time, adjustable regulated DC power supply can reduce capacity and volume. This power supply is also known as a high-frequency adjustable switching power supply.

2. Working principle of adjustable and stable DC power supply

After being rectified and filtered by diodes, AC power passes through high-power and medium power transistors, which conduct output power through resistors. According to the design of the capacitor, a resistor can be connected in series to supply power to the Zener diode before the voltage stabilizes, in order to maintain a stable voltage difference between the two poles of the diode. Other designs are after the transistor output.

This stable voltage is called the reference voltage.

Then use a transistor or integrated block as a comparator. One end (+output) is connected to the reference voltage, and the other end (b) is connected to a current limiting resistor, which is connected to the central adjustable part of the adjustable resistor. The two adjustable pins at the other end are connected to the two poles of the output voltage.

Some poles are connected to the b poles of high-power and medium power transistors to control and regulate the conduction of the transistors.

You can adjust the voltage by adjusting the adjustable resistor.

In short, the principle is to compare the output voltage with the reference voltage through a comparison tube (manifold), and control the conduction current and voltage of high and medium power transistors to achieve voltage regulation. The conduction of the transistor can be controlled by adjusting.

Adjustable regulated DC power supply is a power supply device that can adjust the voltage level of various electrical appliances according to their required voltage during operation. It stabilizes and adjusts the input DC voltage through internal circuits and components to output a stable DC voltage to meet the needs of various electrical appliances.

3. The adjustable and stable DC power supply has the following characteristics

Protection function
Equipped with overvoltage and overcurrent protection functions, it can automatically detect and protect the safety of power supply and electrical equipment. When there is overvoltage or overcurrent in the power supply or electrical equipment, the adjustable DC stabilized power supply will automatically cut off the output to prevent equipment damage and accidents.

Adjustability
The voltage and current of an adjustable DC stabilized power supply can be adjusted through external control or internal settings, allowing users to make precise voltage and current adjustments according to the needs and actual needs of different appliances.

stability
Advanced voltage stabilization and filtering technologies are adopted to ensure the stability and reliability of the output DC voltage, effectively avoiding the impact of voltage fluctuations and interference on electrical equipment.

Easy to control and debug
Usually equipped with control components such as control switches and indicators, users can easily control and debug. At the same time, some high-end adjustable DC stabilized power supplies are also equipped with digital display and control functions, allowing users to more accurately grasp the working status and parameters of the power supply.

Due to the above characteristics, adjustable and stable DC power supplies are widely used in various fields, such as scientific research, industrial production, medical and health care, etc. In these fields, adjustable DC stabilized power supply can be used as the power supply for various electrical equipment, as well as for experimental equipment and testing instruments, providing reliable power guarantee for the normal operation and operation of equipment.
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