A Soft-switching Single-stage Zeta-/SEPIC-based Inverter/Rectifier
A Soft-switching Single-stage Zeta-/SEPIC-based Inverter/Rectifier
复制标题
基于 Zeta/SEPIC 的软开关单级逆变器/整流器
DOI：
10.1109/apec39645.2020.9124509
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. Amirabadi
中科院分区：
文献类型：
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作者：
M. Khodabandeh;M. Amirabadi
本文提出了两种软开关单级转换器：基于 Zeta 的逆变器和基于 SEPIC 的整流器。这两个转换器能够在很宽的范围内升压和降压。此外，这些转换器在链路上使用非常小的薄膜电容器，而不是大多数传统两级逆变器和整流器中使用的电解电容器。与电力电子转换器的其他组件相比，电解电容器的使用寿命较短，并且消除电解电容器可显着提高转换器的可靠性。由于具有交流链路电压而不是直流链路，因此该功能是可行的。所提出的转换器中的所有半导体开关都受益于零电流开关，借助于与链路电容器串联放置的非常小的电感器，而无需辅助/附加的有源开关/二极管。由于作为转换器主要能量传输组件的链路电容器尺寸较小，因此两个转换器的动态响应非常快，使得这些转换器适合极快速响应 (VFR) 应用。此外，由于链路的高频交流电压，如果需要电流隔离，可以在链路处使用高频变压器。本文解释了这些转换器的工作原理，并通过仿真和实验评估了它们的性能。
In this paper, two soft-switching single-stage converters are proposed: A Zeta-based inverter and a SEPIC-based rectifier. These two converters are capable of both stepping up and stepping down the voltage in a wide range. Moreover, these converters use a very small film capacitor at the link, instead of electrolytic capacitors that are used in most of the conventional two-stage inverters and rectifiers. Electrolytic capacitors have a shorter lifetime compared to other components of a power electronic converter and their elimination significantly improves the reliability of a converter. This feature is feasible due to having an ac link voltage instead of a dc link. All the semiconductor switches in the proposed converters benefit from zero-current-switching with the help of a very small inductor placed in series with the link capacitor with no auxiliary/additional active switch/diode. Due to the small size of the link capacitor, which is the main energy transferring component of the converters, the dynamic response of both converters is very fast, making these converters suitable for very fast response (VFR) applications. Furthermore, a high-frequency transformer can be employed at the link in case galvanic isolation is needed, thanks to the high-frequency ac voltage of the link. In this paper the principles of the operation of these converters are explained, and their performance is evaluated through simulation and experiments.