DocumentCode :
2122876
Title :
Optimal pulsewidth modulation of a dual three-level inverter system operated from a single dc link
Author :
Boller, Till ; Holtz, Joachim ; Rathore, Akshay Kumar
Author_Institution :
Electr. Machines & Drives Lab., Univ. of Wuppertal, Wuppertal, Germany
fYear :
2011
fDate :
17-22 Sept. 2011
Firstpage :
3406
Lastpage :
3410
Abstract :
Operating a dual three-level inverter system from a single dc link circuit is an economic solution for generating five-level output voltage waveforms and to double the output power compared to a single three-level inverter. Such inverter system is used for feeding a drive motor with open stator windings. A mechanism is then required to reduce the common mode voltage components of the motor voltages. This paper describes an off-line optimization method that minimizes both the harmonic distortion of the motor currents and the common mode voltage components. The optimization permits reducing the switching frequency to a very low value of 200 Hz without compromising on harmonic distortion. High performance operation of the drive system at low switching frequency is experimentally demonstrated.
Keywords :
PWM invertors; harmonic distortion; motor drives; stators; common mode voltage components; drive motor; drive system; dual three-level inverter system; five-level output voltage waveforms; harmonic distortion; motor currents; motor voltages; off-line optimization method; open stator windings; optimal pulsewidth modulation; single dc link circuit; switching frequency; Harmonic distortion; Inductors; Inverters; Medium voltage; Optimization; Switches; Switching frequency;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2011 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
978-1-4577-0542-7
Type :
conf
DOI :
10.1109/ECCE.2011.6064229
Filename :
6064229
Link To Document :
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