中文摘要：

为了消除次谐波振荡，针对后缘调制的Buck型DC／DC转换器提出了一种数字预测V^2峰值控制算法。首先介绍了基于数字预测V^2控制的Buck转换器系统结构，并对其输出电压纹波进行分析，说明了用输出电容等效串联电阻（ESR）纹波表示输出电压纹波的可行性。然后提出了基于后缘调制的预测V^2峰值控制算法，该算法可在不增加设计复杂度的基础上，有效消除次谐波振荡。最后对提出的控制算法进行实验验证，结果表明，占空比大于0．5时系统输出电压仍然稳定，且与传统电压模式控制相比，系统对负载和输入电压扰动的瞬态响应性能得到了很大提升．

英文摘要：

A digital predictive V^2 peak control strategy is presented for Buck converter with trailing-edge modulation which can eliminate sub-harmonic osciUation.Firstly,the system structure of digital predictive V^2 control is introduced and output voltage ripple is analyzed which illustrates the feasibility of using output capacitor equivalent series resistance （ESR） ripple instead of output voltage ripple.Secondly, a digital predictive V^2 control algorithm based on trailing-edge modulation is proposed which can effectively eliminate sub-harmonic oscillation without increasing the complexity.Finally ,the validity of the proposed approach is demonstrated by the experiment.Experimental results show the system output voltage remains stable when duty cycle greater than 0.5.Compared with conventional voltage control mode, the system transient response performance for load and input voltage disturbance is greatly improved.