Introduction to the development trends of switching power supply technology
The development direction of switching power supplies is high frequency, high reliability, low power consumption, low noise, anti-interference, and modularization. Due to the key technology of light, small, and thin switching power supplies being high-frequency, major foreign switching power supply manufacturers are committed to synchronously developing new and highly intelligent components, especially improving the losses of secondary rectification devices, and increasing technological innovation in power ferrite (Mn Zn) materials to improve high magnetic performance at high frequencies and large magnetic flux densities (Bs). The miniaturization of the device is also a key technology. The application of SMT technology has made significant progress in switch mode power supplies. Components are arranged on both sides of the circuit board to ensure that the switch mode power supply is light, small, and thin. The high-frequency transformation of switching power supplies will inevitably innovate traditional PWM switching technology, and the soft switching technology of ZVS and ZCS has become the mainstream technology of switching power supplies, greatly improving the working efficiency of switching power supplies. For high reliability indicators, American switch mode power supply manufacturers take measures such as reducing operating current and junction temperature to reduce device stress, greatly improving product reliability. Modularization is the overall trend in the development of switching power supplies. Modular power supplies can be used to form distributed power systems, which can be designed as N+1 redundant power systems and achieve capacity expansion in parallel. In response to the disadvantage of high operating noise in switch mode power supplies, if high-frequency conversion is pursued separately, the noise will inevitably increase. Therefore, adopting partial resonant conversion circuit technology can theoretically achieve high-frequency conversion and reduce noise. However, there are still technical problems in the practical application of partial 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 has provided the switching power supply industry with broad development prospects. To accelerate the development speed of China's switching power supply industry, it is necessary to take the path of technological innovation and develop a path of industry university research cooperation with Chinese characteristics, making contributions to the rapid development of China's national economy.
