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Analysis of cascaded H-bridge multilevel inverter configuration with double level circuit

机译：双电平电路级联H桥多电平逆变器配置分析

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摘要

In this study, a new multilevel inverter configuration which introduces a combination of cascaded H-bridge multilevel inverter with a double level circuit is proposed. The double level circuit is a half-bridge inverter when combined with a cascaded H-bridge multilevel inverter, will increase the output voltage level to nearly twice that of a conventional cascaded H-bridge multilevel inverter. The effectiveness of the proposed configuration is demonstrated with five different cases of cascaded H-bridge multilevel inverter configurations. Phase disposition carriers arrangement with sinusoidal reference has been utilised in pulse width modulation for generating the gating signal of switches to achieve high-quality output voltage waveform. A comparison is carried out with different parameters such as %total harmonic distortion, distortion factor, the maximum voltage step of output voltage level and peak inverse voltage. Analysis of power loss and theoretical calculation of %total harmonic distortion is described. Also, a new method for calculating the overall component count is discussed. As a result, the proposed configuration requires lesser component count for generating higher output voltage level with lower %total harmonic distortion. Selected simulation and experimental results are shown to verify and validate the proposed multilevel inverter configuration.
机译：在这项研究中，提出了一种新的多电平逆变器配置，该配置将级联的H桥多电平逆变器与双电平电路相结合。当与级联H桥多电平逆变器结合使用时，双电平电路是半桥逆变器，它将使输出电压电平增加到传统级联H桥多电平逆变器的两倍。提出的配置的有效性通过级联的H桥多电平逆变器配置的五种不同情况得到了证明。具有正弦基准的相位配置载波布置已被用于脉冲宽度调制中，以生成开关的门控信号，以实现高质量的输出电压波形。使用不同的参数进行比较，例如总谐波失真百分比，失真因子，输出电压电平的最大电压阶跃和峰值反向电压。描述了功率损耗分析和总谐波失真百分比的理论计算。此外，讨论了一种用于计算总零件数的新方法。结果，所提出的配置需要较少的组件数以产生具有较低总谐波失真的较高输出电压电平。显示了选定的仿真和实验结果，以验证和验证建议的多电平逆变器配置。

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