DC–DC Converter Implementations Based on Piezoelectric Transformers
DC–DC Converter Implementations Based on Piezoelectric Transformers
复制标题
基于压电变压器的 DC-DC 转换器实现
DOI：
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发表时间：
2022
影响因子：
5.5
通讯作者：
D. Perreault
中科院分区：
文献类型：
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作者：
J. D. Boles;E. Ng;J. Lang;D. Perreault
对电力电子小型化的推动促使人们研究替代的无源元件技术，如压电学，与磁学相比，这种技术在小范围内提供了更高的功率密度和效率。压电变压器(PTS)已在DC-DC转换器中得到应用，但这些设计通常需要额外的磁件才能获得有竞争力的效率。在这项工作中，我们系统地列举了隔离和非隔离的DC-DC转换器拓扑和开关序列，这些拓扑和开关序列能够有效地利用PT作为其唯一的能量存储元件。所提出的开关序列在较宽的电压增益和负载范围内保持高效率行为(例如，零电压开关(ZVS)、全正瞬时功率传输和最小电荷循环)。我们介绍了推导这些开关序列的ZVS区域、估计PT效率和求解周期性稳态开关时间的技术；这些技术为比较和实施设计方案提供了见解。然后，我们在180-500V的实验样机上验证了我们的分析，该样机基于商业上可用的PT，通过拟议的实现显示了显著的效率提高。
The drive to miniaturize power electronics motivates investigation into alternative passive component technologies such as piezoelectrics, which offer fundamentally higher power density and efficiency capabilities at small scales compared to magnetics. Piezoelectric transformers (PTs) have seen application in dc–dc converters, but these designs typically require additional magnetics for competitive efficiency. In this work, we systematically enumerate isolated and nonisolated dc–dc converter topologies and switching sequences capable of efficiently utilizing PTs as their only energy storage components. The proposed switching sequences maintain high-efficiency behaviors (e.g., zero voltage switching (ZVS), all-positive instantaneous power transfer, and minimal charge circulation) across wide voltage gain and load ranges. We present techniques for deriving these switching sequences’ ZVS regions, estimating PT efficiency, and solving for periodic steady state switching times; these offer insights for comparing and implementing design options. We then verify our analyses in a 180–500 V experimental prototype based on a commercially-available PT, which demonstrates significant efficiency gain through a proposed implementation.
影响因子：
6.7
作者：
Forrester, Jack;Davidson, Jonathan Neil;Stone, David A.
通讯作者：
Stone, David A.