Theoretical Analysis of Harmonics in PWM Output Waveform of Multi-Level Inverters
Theoretical Analysis of Harmonics in PWM Output Waveform of Multi-Level Inverters
复制标题
多电平逆变器PWM输出波形谐波的理论分析
DOI：
10.1002/eej.22713
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发表时间：
2015
影响因子：
0.4
通讯作者：
and Yukihiko Sato
中科院分区：
文献类型：
--
作者：
Hidemine Obara;Hiroshi Oguri;and Yukihiko Sato
多电平逆变器具有非常有吸引力的特性，例如输出中的低谐波、低EMI以及所需功率半导体器件的额定电压的降低。其中，输出中的低次谐波可以减少输出谐波滤波器的体积和谐波造成的额外损失。因此，期望多电平逆变器实现更高的功率密度和更高的效率。本文在定量研究这些特性的基础上，对多电平逆变器PWM输出电压中的谐波进行了理论分析。作为理论结果的应用，通过对负荷电流谐波含量的预测，验证了理论结果的有效性。
Multilevel inverters have very attractive features, such as lower harmonics in the output, lower EMI, and reduction of the required voltage rating of power semiconductor devices. Among them, lower harmonics in the output can reduce the volume of the output harmonic filter and additional losses caused by the harmonics. Therefore, multilevel inverters are expected to realize higher power density and higher efficiency. In this paper, as a basis of the quantitative investigation of these features, the harmonics in the PWM output voltage of multilevel inverters are analyzed theoretically. As an application of the theoretical results, the usefulness of the theoretical results is verified by the prediction of the harmonic contents of the load current.