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Characteristics, Principles, and Applications of High Frequency Switching Power Supplies

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.03.20
High frequency switching power supply is a power supply device that can convert low-frequency AC power into high-frequency AC power and efficiently and quickly change output voltage and current. It is often used in power regulation equipment such as inverters, inverters, transformers, etc. High frequency switching power supplies are also widely used in electronic appliances such as air conditioners, televisions, office copiers, and inkjet printers. This article will introduce the characteristics, principles, and applications of high-frequency switching power supplies.


1. Characteristics of high-frequency switching power supply

(1) High frequency switching power supplies can achieve switching operations and greatly improve the conversion efficiency of power supplies. Ordinary transformers only have an efficiency of about 50-70%, while high-frequency switching power supplies meet market demand for loss control, with an efficiency of over 90%.

(2) Compared to simple transformers, which greatly reduce size, ordinary transformers may occupy the entire chassis, while high-frequency switching power supplies only need to occupy a small part of the chassis space to complete the same function

(3) It can be adjusted according to actual needs, and can be adjusted according to actual work needs under the premise of load changes. Some applications will perform load tracking adjustment.

(4) The damping of the output voltage and current is relatively small, which can ensure the stability of the output and high adjustment accuracy. In a constant working environment, continuous output can be achieved, which helps to improve the efficiency of the machine.

2. The principle of high-frequency switching power supply

The principle of high-frequency switching power supply is to use the conduction phenomenon of high-frequency switches to transform low-frequency electrical energy into high-frequency electrical energy without damage through the alternating voltage of the magnetic field, providing power to the load. When a load is given, the controller will emit signals according to the required output voltage rules, control the continuous conduction and disconnection of the switch, use a transformer to change the amplitude of the input voltage, and then pass through a filter to generate a stable output voltage.

3. Application of High Frequency Switching Power Supply

(1) Household electronic appliances: High frequency switching power supplies can be applied to various household appliances, such as televisions, washing machines, air conditioners, etc; In addition, the application of high-frequency switching power supplies can also be seen in the small details of electronic devices, such as various electronic products that change battery voltage, which are often used in battery chargers, greatly reducing charging time and improving charging efficiency.

(2) Power regulation equipment: High frequency switching power supplies are often used in power regulation equipment, such as frequency converters, inverters, and transformers, to change the current input frequency or voltage, as well as adjust the load of electricity.

(3) Other electronic devices: High frequency switching power supplies are also widely used in various electronic devices, such as office and laboratory copiers, scanners, computers, perforation equipment, etc; Often used as industrial automation equipment, especially high-power operating equipment such as laser tomography, for current or voltage regulation to perform more efficient work.

In summary, high-frequency switching power supplies can be applied in household electronic appliances, power regulation equipment, or other electronic devices, with the characteristics of high efficiency, small size, high adjustment accuracy, and broad application prospects.
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