Scheduled System Maintenance:
On May 6th, single article purchases and IEEE account management will be unavailable from 8:00 AM - 12:00 PM ET (12:00 - 16:00 UTC). We apologize for the inconvenience.
By Topic

A new multilevel carrier-based PWM control method for GTO inverter in low index modulation region

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Ben-Brahim, L. ; Coll. of Technol., Qatar Univ., Doha, Qatar ; Tadakuma, Susumu

GTOs have an inherent minimum ON-OFF time, which is needed for their safe operation. For GTO-based three-level or neutral point clamped (NPC) inverters, this minimum ON-OFF pulse width limitation results in a distortion of the output voltage and current waveforms especially in low index modulation region. Some approaches have been previously proposed to compensate for the minimum ON-pulse, however these methods increase the inverter switching losses. Two new methods of PWM control based on (1) adding a bias to the reference voltage of inverter, and (2) switching pattern are presented. The former method improves the output waveforms, but increases the switching losses; while the latter improves the output waveforms without increasing the switching losses. The fluctuations of the neutral point voltage are also reduced using this method. Theoretical and practical aspects as well as the experimental results are presented in this paper.

Published in:

Industry Applications Conference, 2003. 38th IAS Annual Meeting. Conference Record of the  (Volume:1 )

Date of Conference:

12-16 Oct. 2003