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首页> 外文期刊>IEEE Transactions on Power Electronics >Single-Source Three-Phase Multilevel Inverter Assembled by Three-Phase Two-Level Inverter and Two Single-Phase Cascaded H-Bridge Inverters
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Single-Source Three-Phase Multilevel Inverter Assembled by Three-Phase Two-Level Inverter and Two Single-Phase Cascaded H-Bridge Inverters

机译：由三相二级逆变器组装的单源三相多级逆变器和两个单相级联H桥逆变器

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摘要

Multilevel inverters (MLIs) with reduced number of switching devices and dc sources have compact size, reduced cost, and higher efficiency. This article proposes a transformer-based single-source MLI with reduced number of components and small size transformers. The proposed topology is a hybrid three-phase MLI assembled by a conventional three-phase two-level inverter (TTI) and two single-phase cascaded H-bridge inverters (CHBIs). The proposed MLI has a low ratio of number of active switches to number of output voltage levels. In order to use only one dc source, the CHBIs are cascaded with the TTI through transformers. An individual nearest level modulation (NLM) has been developed to control voltage of this inverter. Moreover, power distribution between its modules is analyzed. The total power of the transformers is 28% of the inverter rated power. Simulation and experimental results of a 13-kVA prototype verify the efficiency of the proposed arrangement.
机译：具有减少数量的开关装置和DC源的多级逆变器（MLIS）具有紧凑的尺寸，降低成本和更高的效率。本文提出了一种基于变压器的单源MLI，减少了组件数量和小尺寸变压器。所提出的拓扑是由传统的三相二级逆变器（TTI）组装的混合三相MLI和两个单相级联H桥逆变器（CHBI）。所提出的MLI具有低比率的有源开关与输出电压电平的数量。为了仅使用一个DC源，CHBIS通过变压器与TTI级联。已经开发了一个独立的级别调制（NLM）以控制该逆变器的电压。此外，分析了模块之间的功率分布。变压器的总功率为逆变器额定功率的28％。 13 kVA原型的仿真和实验结果验证了所提出的布置的效率。

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