An asymmetric cascaded H-Bridge inverters for generating 12-sided polygonal space vector diagrams for Motor drives

Mathew, K.; Patel, Chintan; Gopakumar, K.; Das, Anandarup; Ramchand, Rijil

doi:10.1080/09398368.2011.11463784

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…This improvement was obtained by using only the same number of switches. Other types of multilevel 12-sided polygonal voltage space-vector inverters use either cascading two threelevel inverters [14] or a cascaded H-bridge configuration [15], out of which the cascaded H-bridge has the problem of fluctuation of the dc-link voltages [21]. A comparison between these topologies is given in Table 5.…”

Section: Part 3: Experimental Resultsmentioning

confidence: 98%

Multilevel dodecagonal space-vector generation for induction motor drives by cascading three-level and two-level inverters

Mathew

Azeez

et al. 2012

IET Power Electron.

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This study proposes an inverter circuit topology capable of generating multilevel dodecagonal (12-sided polygon) voltage space vectors by the cascaded connection of two-level and three-level inverters. By the proper selection of DC-link voltages and resultant switching states for the inverters, voltage space vectors whose tips lie on three concentric dodecagons, are obtained. A rectifier circuit for the inverter is also proposed, which significantly improves the power factor. The topology offers advantages such as the complete elimination of the fifth and seventh harmonics in phase voltages and an extension of the linear modulation range. In this study, a simple method for the calculation of pulse width modulation timing was presented along with extensive simulation and experimental results in order to validate the proposed concept.

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Section: Part 3: Experimental Resultsmentioning

confidence: 98%