Please use this identifier to cite or link to this item:
Title: PWM methods to handle time delay in digital control of a UPS inverter
Authors: Deng, H.
Oruganti, R. 
Srinivasan, D. 
Keywords: Digital control
Pulse width modulation
PWM inverter
Uninterruptible power supply
Issue Date: Mar-2005
Citation: Deng, H.,Oruganti, R.,Srinivasan, D. (2005-03). PWM methods to handle time delay in digital control of a UPS inverter. IEEE Power Electronics Letters 3 (1) : 1-6. ScholarBank@NUS Repository.
Abstract: With the popularity of micro-processors, digital controllers are widely used in uninterruptible power supply (UPS) inverters. These digital control systems of UPS inverters require a time interval for sampling and computation, which sometimes affects the performance of inverters. In this paper, the problem of time delay in digital control of a UPS inverter is discussed. Then two novel pulsewidth modulation (PWM) methods, the two-polarity PWM method and the asymmetric PWM method, are proposed to handle the time-delay problem. Both of these PWM methods can achieve a wide range of duty ratio between 0.05-0.95, which is independent of inverter model. Furthermore, they are easy to implement using a digital micro-controller. Experimental results are presented in the paper to verify feasibility of the proposed PWM methods. © 2005 IEEE.
Source Title: IEEE Power Electronics Letters
ISSN: 15407985
DOI: 10.1109/LPEL.2004.842402
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Sep 28, 2020

Page view(s)

checked on Sep 21, 2020

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.