Development trend 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, all major foreign switching power supply manufacturers are committed to developing new high-intelligence components simultaneously, especially to improve the loss of secondary rectifier devices, and to apply them in power ferrite (Mn? Zn) materials to increase scientific and technological innovation, in order to improve the high magnetic properties at high frequency and large magnetic flux density (Bs), and miniaturization of the device is also a key technology. 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 innovate 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. For the high reliability index, American switching power supply manufacturers reduce the stress of devices by reducing the running current and junction temperature, which greatly improves the reliability of products. 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. The continuous innovation of power electronics technology makes the switching power supply industry have broad development prospects. To speed up the development of China's switching power supply industry, we must take the road of technological innovation, 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.
