Variable-frequency predictive digital current mode control
Variable-frequency predictive digital current mode control
复制标题
DOI：
10.1109/lpel.2004.841493
复制
发表时间：
2004-12
期刊：
影响因子：
--
通讯作者：
P. Athalye;D. Maksimović;R. Erickson
中科院分区：
文献类型：
--
作者：
P. Athalye;D. Maksimović;R. Erickson
介绍了一种开关变换器电感电流的变频预测数字控制方法。该方法本质上是预测性的，因为提前计算了实现目标电流所需的晶体管关断时间。晶体管导通时间保持恒定，这导致开关频率可变。推导了三种基本变换器连续和不连续工作模式的控制律。稳定性和鲁棒性标准。变频预测控制不需要电流环补偿，具有单周响应和实现相对简单的优点。该控制方法被证明在一个数字信号处理器（DSP）的升压功率因数校正器（PFC），它显示出良好的电流跟踪和非常低的谐波失真的线电流。
A variable-frequency predictive digital control method for the inductor current in switched-mode converters is introduced in this letter. This method is predictive in nature because the transistor off-time required for achieving the target current is calculated ahead of time. The transistor on-time is kept constant, which results in variable switching frequency. The control laws for continuous and discontinuous modes of operation of the three basic converters are derived. Stability and robustness criteria are presented. The variable-frequency predictive control obviates the need for current-loop compensation and has the advantages of single-cycle response and relatively simple implementation. The control method is demonstrated in a digital signal processor (DSP) for a boost power factor corrector (PFC), which shows excellent current tracking and a very low harmonic distortion of the line current.