Development direction of switching power supply technology
The development direction of switching power supply is high frequency, high reliability, low power consumption, low noise, anti-interference and modularization. Because the key technology of light, small and thin switching power supply is high frequency, major foreign switching power supply manufacturers are committed to developing new and highly intelligent components, especially improving the loss of secondary rectifier devices, and increasing technology on power ferrite (MnZn) materials to improve high magnetic performance at high frequency and large magnetic flux density (Bs), and miniaturization of capacitors is also a key technology.
The high frequency makes the switching power supply miniaturized, and makes the switching power supply enter a wider application field, especially in the high-tech field, which promotes the miniaturization and portability of high-tech products. In addition, the development and application of switching power supply is of great significance in saving energy, saving resources and protecting the environment.
The application of SMT technology has made great progress in switching power supply. Components are arranged on both sides of the circuit board to ensure the light, small and thin switching power supply. The high frequency of switching power supply will inevitably carry out the traditional PWM switching technology, and the soft switching technology of ZVS and ZCS has become the mainstream technology of switching power supply, which greatly improves the working efficiency of switching power supply.
Modularity is the general trend of switching power supply development. Modular power supply can be used to form a distributed power supply system, which can be designed as an N+1 redundant power supply system and realize the capacity expansion in parallel. In view of the shortcoming of high noise in switching power supply, if the high frequency is pursued alone, its noise will increase. In theory, the high frequency can be realized and the noise can be reduced by using partial resonance conversion circuit technology, but there are still technical problems in the practical application of partial resonance conversion technology, so a lot of work needs to be carried out in this field to make this technology practical.
With the continuous updating of power electronics technology, the switching power supply industry has broad development prospects. To speed up the development of China's switching power supply industry, we must take the road of technology, walk out of the road of joint development of Industry-University-Research with China characteristics, and make contributions to the rapid development of China's national economy.
