Extended operation of flying capacitor multilevel inverters
Keywords and Phrases
"Recent research in flying capacitor multilevel inverters (FCMIs) has shown that the number of ac voltage levels can be extended by changing to ratio of the dc capacitor voltages. For the three-cell FCMI, four levels of operation are expected if the traditional ratio of the capacitor voltages is 1:2:3. However, by altering the ratio, the inverter can operate as a five-, six-, seven-, or eight-level inverter. According to previous research, the eight-level case is referred to as maximally distended (or full binary combination schema) since it utilizes all possible transistor switching states. However, this case does not have enough per-phase redundancy to ensure capacitor voltage balancing under all modes of operation. In this thesis, redundancy involving all phases is used along with per-phase redundancy to improve capacitor voltage balancing. It is shown that he four- and five-level cases are suitable for motor drive operation and can maintain capacitor voltage balance under a wide range of power factors and modulation indices. The six-, seven-, and eight-level cases are suitable for reactive power transfer in applications such as static var compensation. Simulation and laboratory measurements verify the proposed joint-phase redundancy control"--Abstract, leaf iii.
Electrical and Computer Engineering
M.S. in Electrical Engineering
University of Missouri--Rolla
vii, 53 leaves
© 2005 Jing Huang, All rights reserved.
Thesis - Citation
Library of Congress Subject Headings
Electric current converters -- Design and construction
Electric inverters -- Design and construction
Print OCLC #
Link to Catalog Record
Full-text not available: Request this publication directly from Missouri S&T Library or contact your local library.http://laurel.lso.missouri.edu/record=b5746565~S5
Huang, Jing, "Extended operation of flying capacitor multilevel inverters" (2005). Masters Theses. 5856.