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- W2103135087 abstract "Medium voltage AC drives use multi-pulse, multi-cell or multi-level power converter topologies in order to meet the power quality requirements. In fact, they can easily cancel out low order unwanted harmonics while keeping an even distribution of the load power through out the power semiconductors. Multi-pulse configurations based on active switches are used at the AC/DC stage in order to control the fundamental current component. This allows the control of the power sent to the load while operating at reduced current distortion and unity displacement power factor. For instance, in a 12-pulse configuration, the fundamental component control could be achieved by introducing a chopping angle at the gating pattern as indicated by the selective harmonic elimination technique. Thus, the configuration can handle the fundamental component at expense of the injection of the 11/sup th/ and 13/sup th/ harmonics into the AC system and the 12/sup th/ harmonic to the load, as the lowest unwanted harmonics. This paper proposes that by adding just one extra chopping angle at the gating pattern level, the first unwanted low frequency harmonic is the 24/sup th/. This improvement is achieved without any penalties in the AC waveforms. In general, for a n-pulse converter, the lowest unwanted harmonic is the (2/spl middot/n)/sup th/ harmonic. Simulated and experimental results confirm the theoretical considerations." @default.
- W2103135087 created "2016-06-24" @default.
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- W2103135087 date "2003-10-01" @default.
- W2103135087 modified "2023-09-27" @default.
- W2103135087 title "Improved performance of multi-pulse current and voltage source converters by means of a modified SHE modulation technique" @default.
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- W2103135087 doi "https://doi.org/10.1109/iecon.2002.1187591" @default.
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