NDLI: 17-level inverter with low component count for open-end induction motor drives

Content Provider	IET Digital Library
Author	Kshirsagar, Abhijit Kaarthik, R. Sudharshan Rahul, Arun Gopakumar, K. Umanand, Loganathan Biswas, Sujit K. Cecati, Carlo
Abstract	This study presents a 17-level inverter-based induction motor drive for high-resolution multilevel voltage space-vector (SV) generation. The proposed topology consists of a three-level inverter and a seven-level inverter connected to an open-end winding induction machine. The two inverters are powered by two unequal DC supplies, resulting in a low component count, with just 12 switches and three floating capacitors per phase. The voltage SVs applied by the two inverters are chosen to eliminate circulating power flow and prevent DC bus overcharging. In addition, the switching states of both inverters are chosen in order to keep voltages of all floating capacitors well-controlled. Since the capacitors voltages are controlled using the phase currents, additional pre-charging circuitry is not required. A modulation scheme using level-shifted carriers has also been developed, which can be used with both V/f control and d–q control. The high-voltage inverter has a low effective switching frequency and the low-voltage inverter has a high effective switching frequency, reducing the switching loss. The included results of steady-state and transient testing of an experimental prototype demonstrate that the proposed scheme is suited for industrial drives and traction applications.
Starting Page	922
Ending Page	929
Page Count	8
ISSN	17554535
Volume Number	11
e-ISSN	17554543
Issue Number	Issue 5, May (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/11/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2017.0492
Journal	IET Power Electronics
Publisher Date	2017-12-13
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	17-level Inverter-based Induction Motor Drive Asynchronous Machine Capacitor Switching Capacitor Voltage Control Control of Electric Power System D-q Control Drive Floating Capacitor-per-phase High-resolution Multilevel Voltage Space-vector Generation Induction Motor Drive Industrial Drive Invertors Level-shifted Carriers Low Component Count Low Effective Switching Frequency Low-voltage Inverter Machine Control Modulation Scheme Open-end IM Drive Open-end Winding Induction Machine Phase Current Power Semiconductor Device Power Semiconductor Switches Relay And Switches Seven-level Inverter Switch Switched Mode Converter Switching State Three-level Inverter Traction Application Unequal DC Supplies V-f Control Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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