Generation of Higher Number of Voltage Levels by Stacking Inverters of Lower Multilevel Structures With Low Voltage Devices for Drives

Nair, Viju R and Rahul, Arun S and Kaarthik, Sudharshan R and Kshirsagar, Abhijit and Gopakumar, K (2017) Generation of Higher Number of Voltage Levels by Stacking Inverters of Lower Multilevel Structures With Low Voltage Devices for Drives. In: IEEE TRANSACTIONS ON POWER ELECTRONICS, 32 (1). pp. 52-59.

PDF IEEE_Tra_Pow_Ele_32-1_52_2017.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

This paper proposes a new method of generating higher number of levels in the voltage waveform by stacking multilevel converters with lower voltage space vector structures. An important feature of this stacked structure is the use of low voltage devices while attaining higher number of levels. This will find extensive applications in electric vehicles since direct battery drive is possible. The voltages of all the capacitors in the structure can be controlled within a switching cycle using the switching state redundancies (pole voltage redundancies). This helps in reducing the capacitor size. Also, the capacitor voltages can be balanced irrespective of modulation index and load power factor. To verify the concept experimentally, a nine-level inverter is developed by stacking two five-level inverters and an induction motor is run using V/f control scheme. Both steady state and transient results are presented.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON POWER ELECTRONICS
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	21 Dec 2016 07:28
Last Modified:	21 Dec 2016 07:28
URI:	http://eprints.iisc.ac.in/id/eprint/55587

Actions (login required)

View Item