Purpose

Multilevel inverter (MLI) is a prevailing sensible alternative to two-level inverters that offer a high-quality output voltage waveform, wherein the multiple input direct current (DC) levels are established by using isolated DC sources, batteries and renewable energy sources. The purpose of this paper is to develop MLI to offer lower total harmonic distortion (THD), higher output voltage levels and reduced switching components for high power applications.

Design/methodology/approach

In this paper, a new tapped sources stack succored modified HX bridge MLI (TSSSMHXBMLI) topology is proposed which includes two modules, such as tapped sources stack (TSS) and modified HX bridge inverter, which perform their function in a single stage. Also, this paper outlines the formulaic implementation of the multicarrier/sub-harmonic pulse width modulation (MCPWM/SHPWM) in a Xilinx Spartan3E-500 field programmable gate array (FPGA) is suitable for the developed MLI.

Findings

The feasibility of the suggested topology is well proved by both simulation and experiment results.

Practical implications

This paper examines a new topology of TSSSMHXBMLI with a view to minimize total count of switching components against basic MLI topologies. The operating sequence of the suggested TSSSMHXBMLI topology is verified with the simulation study followed by an experimental investigation.

Originality/value

The simulation and experimental results of suggested MLI topology reveals to obtain lower THD, higher output voltage levels and reduced switching components for high power applications.

中文翻译：

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一种新的抽头源堆栈帮助改进的 HX 桥 MLI

目的

多电平逆变器 (MLI) 是提供高质量输出电压波形的两电平逆变器的流行替代方案，其中多输入直流 (DC) 电平是通过使用隔离的直流电源、电池和可再生能源来建立的。本文的目的是开发 MLI，以便为高功率应用提供更低的总谐波失真 (THD)、更高的输出电压电平和更少的开关组件。

设计/方法/方法

在本文中，提出了一种新的抽头源堆栈支持的改进 HX 桥 MLI (TSSSMHXBMLI) 拓扑，它包括两个模块，例如抽头源堆栈 (TSS) 和改进的 HX 桥逆变器，它们在单级中执行其功能。此外，本文还概述了适用于开发的 MLI 的 Xilinx Spartan3E-500 现场可编程门阵列 (FPGA) 中多载波/次谐波脉宽调制 (MCPWM/​​SHPWM) 的公式实现。

发现

仿真和实验结果都很好地证明了所建议拓扑的可行性。

实际影响

本文研究了一种新的 TSSMHXBMLI 拓扑结构，以尽量减少与基本 MLI 拓扑结构相比的开关组件总数。建议的 TSSMHXBMLI 拓扑的操作顺序通过仿真研究和实验调查进行验证。

原创性/价值

建议的 MLI 拓扑的仿真和实验结果表明，对于高功率应用，可以获得更低的 THD、更高的输出电压电平和更少的开关组件。