A Dense Multilevel 30-Sided Space Vector Generation Using a Single DC Link for an Induction Motor Drive

Modulation using a higher sided polygonal space vector structure (SVS) is an elegant method to increase the linear modulation range and to eliminate the undesired lower order harmonics from motor phase voltage. This article presents the generation of a dense 15-concentric 30-sided multilevel SVS usi...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2021-10, Vol.36 (10), p.11681-11690
Main Authors: R, Rakesh, Majumder, Mriganka Ghosh, Gopakumar, K., Umanand, Loganathan, Cecati, Carlo, Zielinski, Dariusz
Format: Article
Language:English
Subjects:
Capacitors
Electric potential
Harmonic analysis
Harmonic elimination
Harmonics
induction motor
Induction motors
Inverters
Iterative methods
linear modulation
Modulation
Multilevel
multilevel inverter
Phase modulation
Polygons
Power harmonic filters
Pulse duration
space vector structure (SVS)
Switches
Topology
Voltage
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Summary:Modulation using a higher sided polygonal space vector structure (SVS) is an elegant method to increase the linear modulation range and to eliminate the undesired lower order harmonics from motor phase voltage. This article presents the generation of a dense 15-concentric 30-sided multilevel SVS using a single dc-link for an open end induction motor (OEIM) drive. The proposed scheme eliminates lower order harmonics till 25th order from motor phase voltage throughout the modulation range. The dv/dt stress in the phase voltage applied to the motor will also be highly reduced owing to the multilevel structure. The pulsewidth modulation scheme employed utilizes the denseness of SVS and avoids iterative searches to find the triangle, which encompasses the tip of reference voltage vector, which are typical in multilevel polygonal SVS. The topology consists of an active dc-link fed three-level primary inverter and a capacitor fed five-level secondary inverter connected to either end of an OEIM. The primary inverter acts as the active power supplier for the drive and the secondary inverter filters out the undesirable lower order harmonics from motor phase voltage. The proposed scheme is experientially validated and the results are included in this article.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2021.3070078