Design Constraints for Series-Stacked Energy Decoupling Buffers in Single-Phase Converters

被引：21
作者：
Liao, Zitao [1 ]
Brooks, Nathan C. [1 ]
Pilawa-Podgurski, Robert C. N. [2 ]
机构：
[1] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 USA
[2] Univ Calif Berkeley, Berkeley, CA 94720 USA
来源：
IEEE TRANSACTIONS ON POWER ELECTRONICS | 2018年 / 33卷 / 09期
基金：
美国国家科学基金会;
关键词：
Active energy buffer; capacitors; optimization; single-phase;
D O I：
10.1109/TPEL.2018.2799805
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In single-phase dc-ac and ac-dc conversion, energy decoupling is needed to compensate for the instantaneous power mismatch between the ac side and the dc side. The series-stacked buffer (SSB) is a type of active energy decoupling buffer that allows a large voltage ripple on the energy buffering capacitor to improve the energy utilization ratio while actively regulating the dc-bus voltage with minimal ripple. This architecture has been demonstrated to achieve high efficiency, high power density, and excellent ripple control on the dc bus. This letter presents a set of design constraints for the SSB that describe the quantitative relation among passive components and load power level. Compared to previous works on the SSB, the new constraints accurately identify the operation limits of the SSB. A more optimized sizing solution is thus derived. The new design constraints are derived step by step and verified with simulations and experiments.
引用
收藏
页码：7305 / 7308
页数：4
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