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DC stabilized power supply is a device that can provide a stable DC output voltage, which is widely used in electronic experiments, research and development, production, and testing. This article will introduce the working principle of DC stabilized power supply and its wide range of applications in practical use.

I. The Working Principle of DC Stabilized Power Supply

The DC stabilized power supply converts AC power to DC power and provides a stable output voltage through a voltage stabilizing circuit. Its working principle mainly includes the following aspects:

1.AC to DC Conversion

– The first step of a DC stabilized power supply is to convert the input alternating current (AC) into direct current (DC). This process is usually achieved through a rectifier circuit.

– The rectifier circuit, typically consisting of a diode bridge or single-phase/three-phase rectifier, converts both the positive and negative half-cycles of AC into pulsating DC in the same direction.

2.Filtering

– The pulsating DC after rectification contains a lot of ripples and noise, which needs to be smoothed out by a filter circuit.

– Common filters include capacitor filters and inductor filters, which can eliminate most of the AC components and make the DC smoother.

3.Voltage Stabilizing Circuit

– The filtered DC may still be affected by factors such as input voltage fluctuations and load changes. The role of the voltage stabilizing circuit is to maintain the stability of the output voltage.

– The voltage stabilizing circuit usually adopts Zener diodes, linear regulators, or switching regulators. Among them, linear regulators such as the LM7805 series are suitable for low-power applications, while switching regulators such as the LM2596 series are suitable for high-efficiency, high-power applications.

4.Feedback Control

– High-precision DC stabilized power supplies also adopt a feedback control mechanism. By monitoring the output voltage in real-time, comparing it with the set value, and adjusting the conduction state of control elements (such as MOSFETs, transistors) to maintain the stability of the output voltage.

II. Applications of DC Stabilized Power Supply

DC stabilized power supplies have a wide range of applications in various fields, including:

1.Laboratory and Research & Development

– In electronic experiments and research & development, DC stabilized power supplies are used to provide stable DC power for various circuits. Researchers can adjust the output voltage to meet the needs of different experiments.

2.Production Testing

– In the production process of electronic products, DC stabilized power supplies are used to test the performance of circuit boards and components. A stable power supply can ensure the accuracy and reliability of test results.

3.Electrical Appliance Repair

– In electrical appliance repair, DC stabilized power supplies are used to replace batteries or internal power supplies of electrical appliances, facilitating circuit detection and repair.

4.Communication Equipment

– Communication equipment usually requires a stable power supply to ensure that signal transmission and processing are not affected by voltage fluctuations. DC stabilized power supplies play an important role in such applications.

5.Automation Equipment

– In industrial automation equipment, DC stabilized power supplies are used to drive various sensors, controllers, and actuators to ensure the normal operation of the system.

III. Precautions for Using DC Stabilized Power Supply

When using a DC stabilized power supply, the following points should be noted:

1.Voltage Setting

– Set the appropriate output voltage and current values according to specific needs to avoid damage to the equipment caused by excessively high voltage and current.

2.Stable Connection

– Ensure a stable connection between the power supply and the load to avoid looseness and short circuits, preventing circuit damage and fire risks.

3.Heat Dissipation Management

– The DC stabilized power supply generates heat during operation, requiring good heat dissipation measures. Especially in high-power applications, it should be ensured that the radiator or fan of the power supply is working properly.

4.Overload Protection

– Many DC stabilized power supplies have built-in overload protection functions. When the load exceeds the rated value, the power supply will automatically shut down or limit the output current to protect the power supply and load.

5.Safety Protection

– Pay attention to safety during operation, avoid touching live parts to prevent electric shock accidents. The working environment should be kept dry to avoid electrical failures caused by a damp environment.

IV. Summary

DC stabilized voltage supply converts alternating current into stable direct current through rectification, filtering, voltage stabilization and other steps, which is widely used in laboratory research and development, production testing, electrical maintenance, communication equipment, automation equipment and other fields. The correct use and maintenance of DC stabilized voltage supply can not only improve work efficiency, but also ensure the normal operation and safety of electronic equipment.