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Trans-Z-source and Γ-Z-source neutral-point-clamped inverters

机译：Trans-Z源和Γ-Z源中性点钳位逆变器

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摘要

Z-source neutral-point-clamped (NPC) inverters are earlier proposed for obtaining voltage buck-boost and three-level switching simultaneously. Their performances are, however, constrained by a trade-off between their input-to-output gain and modulation ratio. This trade-off can lead to high-voltage stress across the inverter bridge and poor output voltage spectrum. As alternatives with improved performances, two transformer-based Z-source NPC inverters are proposed, whose gain can be adjusted by varying the transformer turns ratio, and is hence less dependent on the inverter modulation ratio. Limitations faced by the earlier Z-source NPC inverters are therefore avoided by the proposed inverters, as demonstrated through experiments.
机译：早先提出了Z源中性点钳位（NPC）逆变器，以同时获得降压-升压和三电平开关。但是，它们的性能受到其输入输出增益与调制比之间的权衡的限制。这种折衷会导致逆变桥两端的高压应力和不良的输出电压频谱。作为具有改进性能的替代方案，提出了两个基于变压器的Z源NPC逆变器，它们的增益可以通过改变变压器匝数比进行调整，因此对逆变器调制比的依赖性较小。因此，建议的逆变器可以避免早期Z源NPC逆变器面临的局限性，如实验所示。

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