Multi-Objective Design of Single-Phase Differential Buck Inverters With Active Power Decoupling
Multi-Objective Design of Single-Phase Differential Buck Inverters With Active Power Decoupling
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DOI：
10.1109/ojpel.2022.3147769
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发表时间：
2022
影响因子：
5.8
通讯作者：
Rajesh Rajamony;Sheng-Kuan Wang;R. Navaratne;Wenlong Ming
中科院分区：
文献类型：
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作者：
Rajesh Rajamony;Sheng-Kuan Wang;R. Navaratne;Wenlong Ming
单相差分降压逆变器的设计有两个重要的考虑因素，包括使用去耦电容器减少二阶涟漪功率和提高逆变器性能。使用较大的去耦电容器将提高涟漪功率降低的性能和效率，同时降低功率密度。这种权衡尚未完全建模和研究，导致逆变器的次优设计。为了解决这一问题，本文通过详细的数学建模和灵敏度研究，去耦电容，逆变器效率和功率密度之间的权衡进行了研究。为了便于逆变器的设计，本文还研究了逆变器关键部件（包括功率开关、电感和散热器）的体积和功率损耗之间的折衷关系。提出了一种基于几何规划的快速多目标优化设计方法，以优化逆变器的效率和功率密度。一个1千瓦的原型氮化镓（GaN）为基础的逆变器已被设计所提出的方法。该逆变器的硬件样机已建成并进行了测试，其效率为98.02%，功率密度为$ {4.54\;\mathrm{{kW/dm^{3}$，与所提出的多目标设计方法的匹配率为99%。这验证了所提出的设计方法的准确性和有效性，考虑详细的权衡分析。
The design of single-phase differential buck inverters has two important considerations, including reducing second-order ripple power using decoupling capacitors and increasing inverter performances. Using larger decoupling capacitors will improve the performance of ripple power reduction and efficiency while reducing power density. Such trade-off has not been fully modeled and investigated, leading to the sub-optimal design of inverters. To address that, in this paper, the trade-off among decoupling capacitance, inverter efficiency and power density are investigated through detailed mathematical modeling and sensitivity study. The trade-off of the volume and power loss of essential inverter components, including power switches, inductors and heatsinks, are also studied to facilitate the inverter design. A fast multi-objective design optimization method based on geometric programming is presented to optimize the inverter efficiency and power density. A 1 kW prototype of a Gallium Nitride (GaN) based inverter has been designed based on the proposed method. A hardware prototype of the inverter has been built and tested, which has an efficiency of 98.02% and power density $ {4.54\;\mathrm{{kW/dm^{3}}}}$ and matches 99% to the presented multi-objective design method. This validates the accuracy and effectiveness of the presented design approach considering detailed trade-off analysis.