What are the working principle and characteristics of high-frequency switching power supplies?
High-frequency switching power supply What are the working principle and characteristics? The switch K repeatedly opens and closes at a specific time interval. When the switch K is closed, the input power E is supplied to the load RL through the switch K and the filter circuit. During all switch closures, the power supply E powers the load; when the switch K is open, the input power supply E interrupts the energy supply.
The output terminal is connected to a voltage stabilization, current limiting, and voltage limiting response circuit. When in voltage regulation state, the voltage regulation and current limiting circuits will work. When the output voltage increases or decreases, the sampling voltage is compared with the reference voltage through the internal voltage comparator of the stabilization circuit, and the error signal voltage is added to the PWM control circuit. The PWM output pulse width changes accordingly, and then the output voltage is stabilized. If the load current is too high, the current limiting circuit will limit the output current within the current limiting set value. Its characteristics are as follows:
(1) When various modules fail, they can be replaced with power supplies without affecting the normal operation of the system, and they are easy to expand and maintain.
(2) When the thyristor rectifier operates in floating charging mode, the ripple factor of the DC output is relatively large, and accidents such as misoperation of the central signaling device and erroneous signal transmission of high-frequency relay protection have occurred.
(3) The high-frequency switching power supply rectifier module has a built-in microprocessor, which is the basis for improving the equipment management level. Under the premise that the fault signals of the DC system should be as perfect as possible, the wiring is simple, and the installation and debugging are quick. In addition to directly displaying the output current and voltage of the module and various operating conditions on the panel, it can also communicate with the power system automation network or DC shift monitoring system in the substation area through the monitoring module for remote monitoring and various operations on the module, realizing the functions of four remote controllers.
(4) According to the requirements of the Ministry of Industry and Information Technology, the accuracy error of the stable current during charging is ≤ ±5%, and the accuracy error of the stable voltage during floating charging is ≤ ±2%. High-frequency switching power supplies have high voltage stability and current stability accuracy, and their errors are generally ≤ ±0.5%, which can avoid overcharging the battery and ensure that the battery is in the best condition. Valve-controlled batteries have large capacity, less maintenance, low discharge rate, and are suitable for large-capacity DC power supplies.
(5) The rectifier module of the high-frequency switching power supply has an automatic current sharing function in the parallel operation mode. It also has overcurrent, overvoltage, and instantaneous short-circuit protection functions, safe and reliable lightning protection measures, and can effectively withstand the impact of output short circuits. In addition, various effective measures should be taken to prevent interference from high-frequency power and harmonics on the AC grid side.
(6) High-frequency switching power supply has high comprehensive conversion efficiency. The conversion efficiency of most manufacturers reaches more than 90%, while the conversion efficiency of phase-controlled power supplies is usually only 60% to 80%.
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Market and Development Trends of High-Frequency Switching Power Supply Manufacturers
High-frequency switching power supplies are an indispensable core component in modern electronic products. With the rapid development of electronic technology, especially the continuous progress in consumer electronics, communication equipment, and industrial automation, the market demand for efficient, compact, and stable power supplies is increasing. This has led to the booming development of high-frequency switching power supply manufacturers. In this article, we will explore the current market status and development trends of high-frequency switching power supply manufacturers. I. Industry Overview High-frequency switching power supplies are power supply devices that control energy conversion through electronic switching devices (such as transistors). The working principle is to convert the input DC or AC voltage into a stable output voltage through high-frequency switching operations. Compared with traditional linear power supplies, high-frequency switching power supplies have advantages such as small size, high efficiency, and low heat generation, and are widely used in various electronic products such as computers, televisions, communication equipment, and power tools. II. Market Demand With the popularization of smart devices and the requirements of energy saving and environmental protection, the market demand for high-frequency switching power supplies continues to grow. Especially in the fields of consumer electronics, industrial automation, LED lighting, and electric vehicles, modern power supply equipment is increasingly inclined to miniaturization, lightweight, intelligence, and high efficiency. Therefore, high-frequency switching power supply manufacturers
How to judge the technical strength of a high-frequency switching power supply manufacturer?
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