DocumentCode :
76954
Title :
Space-Vector-Based Synchronized Three-Level Discontinuous PWM for Medium-Voltage High-Power VSI
Author :
Beig, Abdul Rahiman ; Kanukollu, Saikrishna ; Al Hosani, Khalifa ; Dekka, Apparao
Author_Institution :
Dept. of Electr. Eng., Pet. Inst., Abu Dhabi, United Arab Emirates
Volume :
61
Issue :
8
fYear :
2014
fDate :
Aug. 2014
Firstpage :
3891
Lastpage :
3901
Abstract :
The high-power voltage source inverters are switched at low frequency to reduce the losses in the inverter. The discontinuous pulsewidth-modulation (PWM) sequences reduce the switching frequency to two-thirds compared to the conventional continuous PWM sequences. At low switching frequency, the output will be rich in harmonics, and synchronization is a must to avoid subharmonics. This paper presents four basic types of synchronized discontinuous PWM (DPWM) sequences that ensure synchronization, three-phase symmetry, and half-wave symmetry. The proposed synchronized DPWM sequences are verified through simulation and experiment on a constant- v/f open-loop induction motor drive. The performance of the proposed DPWM algorithms is studied in the entire modulation region, including the overmodulation region, and is compared with that of the conventional synchronized space vector PWM. A different type of DPWM with low common-mode voltage is suggested for low-modulation region and verified experimentally.
Keywords :
PWM invertors; harmonics suppression; induction motor drives; losses; switching convertors; synchronisation; DPWM sequence; VSI; constant-v/f open loop induction motor drive; continuous PWM sequence; half-wave symmetry; harmonics analysis; loss reduction; overmodulation region; pulsewidth modulation; space vector-based synchronized three level discontinuous PWM sequence; switching frequency reduction; three phase symmetry; voltage source inverter; Harmonic analysis; Inverters; Pulse width modulation; Switches; Synchronization; Vectors; Harmonic analysis; pulsewidth modulation (PWM); total harmonic distortion (THD); variable speed drives; voltage source inverters (VSIs);
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2013.2288194
Filename :
6651785
Link To Document :
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