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Five-level inverter voltage-space phasor generation for an open-end winding induction motor drive

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5 Author(s)
M. R. Baiju ; Centre for Electron. Design & Technol., Indian Inst. of Sci., Bangalore, India ; K. Gopakumar ; K. K. Mohapatra ; V. T. Somasekhar
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A topology for voltage-space phasor generation equivalent to a five-level inverter for an open-end winding induction motor is presented. The open-end winding induction motor is fed from both ends by two three-level inverters. The three-level inverters are realised by cascading two two-level inverters. This inverter scheme does not experience neutral-point fluctuations. Of the two three-level inverters only one will be switching at any instant in the lower speed ranges. In the multilevel carrier-based SPWM used for the proposed drive, a progressive discrete DC bias depending on the speed range is given to the reference wave to reduce the inverter switchings. The drive is implemented and tested with a 1 HP open-end winding induction motor and experimental results are presented.

Published in:

IEE Proceedings - Electric Power Applications  (Volume:150 ,  Issue: 5 )