The Development Trend of Switch Power Supply Technology
The development direction of switching power supply is high frequency, high reliability, low consumption, low noise, anti-interference and modularization. Because the key technology of switching power supply is light, small and thin is high frequency, so the major foreign switching power supply manufacturers are committed to the simultaneous development of new high-intelligence components, especially to improve the loss of the secondary rectifier device, and in the power iron Oxygen (Mn? Zn) materials to increase scientific and technological innovation to improve the high magnetic performance at high frequency and large magnetic flux density (Bs), and the miniaturization of the device is also a key technology. The application of SMT technology has made great progress in switching power supplies. Components are arranged on both sides of the circuit board to ensure that the switching power supply is light, small and thin. The high frequency of switching power supply will inevitably innovate the traditional pWM switching technology. The soft switching technology of ZVS and ZCS has become the mainstream technology of switching power supply, and the working efficiency of switching power supply has been greatly improved. For high reliability indicators, switching power supply manufacturers in the United States reduce the stress on devices by reducing the operating current and junction temperature, which greatly improves the reliability of the products. Modularization is the general trend in the development of switching power supplies. Modular power supplies can be used to form distributed power supply systems, and N+1 redundant power supply systems can be designed to achieve capacity expansion in parallel mode. Aiming at the disadvantage of high operating noise of the switching power supply, if the high frequency is pursued alone, the noise will also increase accordingly, and the use of part of the resonant conversion circuit technology can theoretically achieve high frequency and reduce noise, but some There are still technical problems in the practical application of resonant conversion technology, so a lot of work still needs to be carried out in this field to make this technology practical. The continuous innovation of power electronics technology makes the switching power supply industry have broad development prospects. To speed up the development of my country's switching power supply industry, we must take the road of technological innovation, walk out of the road of joint development of industry, education and research with Chinese characteristics, and contribute to the rapid development of my country's national economy.
Three conditions of switching power supply
switch
Power electronics operate in a switching state rather than a linear state
high frequency
Power electronic devices operate at high frequencies rather than low frequencies close to industrial frequencies
DC
The switching power supply outputs DC instead of AC and can also output high-frequency AC such as electronic transformers
