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Three-Level Inverter Fed Open- end Winding IM Drive with Common Mode Voltage Elimination and Reduced Power Device Count

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5 Author(s)
Figarado, S. ; Indian Inst. of Sci., Bangalore ; Gopakumar, K. ; Mondal, G. ; Sivakumar, K.
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A three-level space phasor generation scheme with common mode voltage elimination and with reduced power device count is proposed for an open end winding induction motor in this paper. The open end winding induction motor is fed by two three-level inverters from both sides. Each two level inverter is formed by cascading two two-level inverters. By sharing the bottom inverter for the two three- level inverters on either side, the power device count is reduced. The switching states with zero common mode voltage variation are selected for PWM switching so that there is no alternating common mode voltage in the pole voltages as well as in phase voltages. Only two isolated DC-links, with half the voltage rating of a conventional three-level neutral point clamped inverter, are needed for the proposed scheme.

Published in:

Industrial Electronics Society, 2007. IECON 2007. 33rd Annual Conference of the IEEE

Date of Conference:

5-8 Nov. 2007