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What is a switching power supply?

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.18
Switching power supply is a common power supply device widely used in various electronic devices. So, what is a switching power supply? This article will explain the definition, working principle, and advantages of switching power supplies from different perspectives.



1. Definition of Switching Power Supply

A switching power supply is an electrical device that can convert alternating current into direct current and regulate the current through switching components. It converts the power supply voltage into a stable DC voltage, providing power support for the normal operation of electronic devices. Switching power supplies are commonly used in fields such as computers, communication equipment, industrial automation, and medical equipment.

2. The principle of switching power supply

The working principle of switching power supply is mainly divided into two stages: energy storage stage and output stage. Firstly, during the energy storage stage, the AC power supply is rectified through a rectifier circuit to obtain an approximate DC voltage. Then, switching operations are carried out through switching tubes or switching diodes to convert the approximate DC voltage into high-frequency pulse voltage in a short period of time. Finally, the high-frequency pulse voltage is converted into a stable DC voltage through a filtering circuit, which is supplied to electronic devices.

3. Advantages of Switching Power Supplies

Efficiency: Switching power supplies have efficient conversion characteristics, which can convert electrical energy into the voltage and current required by electronic devices, reducing energy loss.

Stability: Switching power supplies have high stability in the output of current and voltage, and can provide stable and reliable power supply.

Compact size: Compared to traditional linear power supplies, switch mode power supplies have the characteristics of small size and light weight, occupying less space, and are suitable for integration in various small electronic devices.

Versatility: Switching power supplies can adapt to inputs of different voltage levels, with strong applicability and flexibility, suitable for electronic devices in different fields.

4. Application Cases of Switching Power Supply

Communication equipment: Switching power supplies are widely used in communication equipment such as base stations, routers, switches, etc., and can provide stable power supply for these devices.

Industrial automation: Switching power supplies are commonly used in the field of industrial automation to supply power to control systems, sensors, and other equipment, providing necessary power guarantees for industrial production.

Physical therapy equipment: Switching power supplies have advantages such as stable output voltage and good electromagnetic compatibility, which can be widely used in medical equipment to ensure the normal operation of medical devices and the safety of patients.

Automotive Electronics: Switching power supplies can provide stable power support for automotive electronic devices, including in car navigation systems, audio equipment, etc., improving driving experience and safety.

Summary

Switching power supply, as an important power supply device, has advantages such as high efficiency, stability, compact size, and versatility, and plays an important role in communication equipment, industrial automation, medical equipment, and automotive electronics. Mastering the definition, working principle, and application cases of switching power supplies can help us better understand and apply this technology.
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