A multilevel inverter system for an induction motor with open-end windings
Somasekhar, V.T.
Gopakumar, K.
Baiju, M.R.
Mohapatra, K.K.
Umanand, L.
Centre for Electron. Design & Technol., Indian Inst. of Sci., Bangalore, India;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: June 2005
Volume: 52,
Issue: 3
On page(s): 824- 836
ISSN: 0278-0046
INSPEC Accession Number: 8464611
Digital Object Identifier: 10.1109/TIE.2005.847584
Current Version Published: 2005-05-31
Abstract
In this paper, a multilevel inverter system for an open-end winding induction motor drive is described. Multilevel inversion is achieved by feeding an open-end winding induction motor with two two-level inverters in cascade (equivalent to a three-level inverter) from one end and a single two-level inverter from the other end of the motor. The combined inverter system with open-end winding induction motor produces voltage space-vector locations identical to a six-level inverter. A total of 512 space-vector combinations are available in the proposed scheme, distributed over 91 space-vector locations. The proposed inverter drive scheme is capable of producing a multilevel pulsewidth-modulation (PWM) waveform for the phase voltage ranging from a two-level waveform to a six-level waveform depending on the modulation range. A space-vector PWM scheme for the proposed drive is implemented using a 1.5-kW induction motor with open-end winding structure.
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