Development direction of switch mode power supply technology
The development direction of switching power supply is high frequency, high reliability, low consumption, low noise, anti-interference and modularity. As switching power supply light, small, thin key technology is high-frequency, so the major foreign switching power supply manufacturers are committed to the simultaneous development of new highly intelligent components, in particular, to improve the loss of the secondary rectifier parts, and in the power ferrite (Mn Zn) materials to increase the science and technology * to improve the high frequency and larger flux density (Bs) to obtain a high degree of magnetic performance, the And the miniaturisation of capacitors is also a key technology.
High-frequency makes switching power supply miniaturisation, and switching power supply into a wider range of applications, especially in the field of high and new technology, promoting the miniaturisation of high-tech products, lightweight. In addition, the development and application of switching power supply has important significance in saving energy, saving resources and protecting the environment.
The application of SMT technology has made great progress in switching power supply, and components are arranged on both sides of the circuit board to ensure that the switching power supply is light, small and thin. Switching power supply of high frequency will inevitably on the traditional PWM switching technology into the realization of ZVS, ZCS soft switching technology has become the mainstream technology of switching power supply, and significantly improve the efficiency of the switching power supply.
Modularity is the overall trend of the development of switching power supply, modular power supply can be used to form a distributed power supply system, can be designed as N +1 redundant power supply system, parallel mode capacity expansion. Switching power supply operation noise for this shortcoming, if the pursuit of high-frequency noise is also bound to increase, and the use of part of the resonant conversion circuit technology, in theory, can achieve high-frequency and can reduce the noise, but part of the practical application of the resonant conversion technology is still a technical problem, it is still necessary to carry out a great deal of work in this field, in order to make the technology to be practical.
The continuous development of power electronics technology, so that the switching power supply industry has broad prospects for development. To speed up the development of China's switching power supply industry, it is necessary to take the road of technology **, out of the joint development of production, research and development of Chinese characteristics of the road, to contribute to the rapid development of China's national economy.
