Computationally efficient space vector modulation for multilevel inverters and improved capacitor voltage control
Date
2012
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Abstract
Computational intensity is a major drawback of the space vector modulation method as employed in multilevel inverters. The first part of this thesis introduces a general and very fast space vector modulation algorithm to calculate the switch on-time duration for a given N-level multilevel inverter topology. Calculation of the nearest three voltage vector coordinates is not required for the proposed algorithm, resulting in a very significant computational improvement. The proposed approach is also. extended for use with cascaded H-Bridge multilevel inverters with non-equal DC sources subjected to random voltage deviations. To overcome a major disadvantage of diode clamped inverters, namely DC capacitor voltage fluctuation, another new and very fast space vector modulation scheme is also presented. This scheme is based on the Nearest Three VirtualVector Space Vector Modulation method. Simulations in the MATLAB environment and experimental work using the TMS320F28 l 2 digital signal processor verify the performance of the proposed algorithms.
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Bibliography: p. 142-151
Some pages are in colour.
Some pages are in colour.
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Citation
Mohamadiniaye, B. (2012). Computationally efficient space vector modulation for multilevel inverters and improved capacitor voltage control (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/4955