Dead-zone digital controllers for improved dynamic response of low harmonic rectifiers
Dead-zone digital controllers for improved dynamic response of low harmonic rectifiers
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DOI：
10.1109/tpel.2005.861157
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发表时间：
2006-01
影响因子：
6.7
通讯作者：
A. Prodic;D. Maksimović;R. Erickson
中科院分区：
文献类型：
--
作者：
A. Prodic;D. Maksimović;R. Erickson
本文介绍了一种简单的数字控制方法，使输出电压的快速调节低谐波整流器的功率因数校正（PFC）。该方法基于不敏感区域的使用，即，在模数转换中，用于消除反馈回路中的输出电容器电压涟漪的“死区”。死区可以是固定的，大于最大涟漪幅度，也可以根据输出负载动态调整。这两个死区控制器的简单实现显示在一个实验完全数字控制的250 W升压PFC工作在200 kHz的开关频率。实验结果表明，这种控制方法的结果在低电流谐波和改善负载的瞬态响应，这是显着快于在低谐波整流器与传统的低带宽电压环控制器。
This paper introduces a simple digital control method that enables fast regulation of the output voltage in low harmonic rectifiers with power factor correction (PFC). The method is based on the use of an insensitive region, i.e., "dead-zone," in analog-to-digital conversion, for elimination of the output capacitor voltage ripple in the feedback loop. The dead-zone can either be fixed and larger than the maximum ripple magnitude, or it can be dynamically adjusted in accordance with the output load. Simple implementations of these two dead-zone controllers are shown on an experimental completely digitally controlled 250-W boost PFC operating at 200-kHz switching frequency. The experimental results show that this control method results in low current harmonics and improved load transient responses, which are significantly faster than in low-harmonic rectifiers with conventional low-bandwidth voltage-loop controllers.