提出一种适用于DC/DC变换器的输出电压微分–单周控制(output voltage differential coefficient and one cycle control,OVDC-OCC)方法。介绍其工作原理,并利用状态空间平均方法建立了这种新型反馈控制Buck变换器的小信号模型,在此基础上进行频域仿真,并对结果进行了对比分析,最后进行了实验研究,给出相关实验结果。仿真和实验结果表明,OVDC-OCC控制比传统电压控制Buck变换器具有更好的抗输入电压扰动能力和更好的动态负载性能。
A method of controlling chaos in the voltage-mode buck converter is presented by using an improved notch filter feedback control in this paper. The proposed control part comprises a notch filter and a low-pass filter. The discrepancy between the outputs of the two filters is introduced into the control prototype of the power converter. In this way, the system period-1 solution is kept unchanged. The harmonic balance method is applied to analysing the variation law of the system bifurcation point, and then the stable range of the feedback gain is ascertained. The results of simulation and experiment are also given finally.
