NDLI: Sigma-Z-source inverters

Content Provider	IET Digital Library
Author	Soon, Jing Jun Low, Kay Soon
Abstract	To increase the boost capability with minimum passive components, existing transformer-based Z-source inverter (ZSI) topologies require the turn ratio to be increased. This results in larger transformer windings to be used in high dc–ac voltage gain applications. This shortcoming is addressed in this study by introducing a sigma-ZSI (ΣZSI) that improves the dc–ac voltage gain by reducing the turn ratio leading to a lower winding transformer. The proposed topology is compared with the TZSI as they used the same number of transformers and capacitors configured in an X-shaped network. The comparison shows that the ΣZSI will have a higher dc–ac voltage gain at a turn ratio lower than 1.618 for a given shoot-through duty cycle allowing the use of smaller transformers. Simulation and experimental results have validated the effectiveness of the proposed ΣZSI.
Starting Page	715
Ending Page	723
Page Count	9
ISSN	17554535
Volume Number	8
e-ISSN	17554543
Issue Number	Issue 5, May (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/8/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2014.0274
Journal	IET Power Electronics
Publisher Date	2015-02-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Boost Capability Capacitor Dc-ac Voltage Gain Duty Cycle Invertors Other Power Apparatus And Electric Machine Passive Component Power Capacitor Power Transformer Sigma-Z-source Inverter Transformer And Reactors Transformer Windings X-shaped Network ZSI Topology
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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