先进数字控制技术在DC-DC变换器中的应用

摘要

综述了数字控制技术在直流-直流变换器中的应用,集中于两个方面,如何产生数字脉宽调制信号,以满足输出电压的稳态精度,以及新的控制策略以发挥数字电路的优点.在前者,本文介绍了几种技术,它们都可以用有限的时钟频率来产生足够精度的脉宽调制信号.在后者,本文介绍了几种数字控制技术,以大大改进开关电源的动态性能.%This paper reviews the latest advanced control technologies in DC-DC converters, which is mainly focused on two areas: digital control technologies directly to treat power waveforms and intelligent control strategies to treat system implemented by means of digital technology. The former emphasizes the methods to generate digital PWM (DPWM) signals to meet the output voltage accuracy requirement. Various techniques have been developed to improve the output voltage accuracy at a reasonable clock frequency. The latter develops new control methods that can utilize the advan- tages of the digital controller so as to improve the dynamic performance of the switching power converters. Several new digital control methods are proposed and significant dynamic performance improvement is achieved.