low cost digital signal generation for driving space vector pwm inverter

ELECTRICAL ENGINEERING Low cost digital signal generation for driving space vector PWM inverter Mahmoud Gaballah * , Mohammed El-Bardini Dept. of Industrial Electronics & Control Engineering, Faculty of Electronic Engineering, Minufiya University, Menouf 32852, Egypt Received 26 September 2011; revised 25 January 2013; accepted 9 February 2013 Available online 19 March 2013 KEYWORDS Pulse-width modulation (PWM); Space vector PWM (SVPWM); Voltage source inverter (VSI) Abstract There is an increasing trend of using space vector pulse- width modul ation (SVPWM) schemes for driving voltage source inverters because of their easier digital realization and better DC bus utilization. This paper introduces an SVPWM technique based on a reduced computation method, which is much simpler and more executable than convent ional means without lookup table s or complex logical judgments. The SVPWM scheme is mode led and simul ated using MAT- LAB SIMULINK and experimentally implemented and verified on microchip PIC microcontroller 18F4431 platform. The experimental results are presented for three-phase two-level inverter fol- lowed by three-phase LC filter. 2013 Ain Shams University. Production and hosting by Elsevier B.V. All rights reserved. 1. Introduction Volt age sour ce inve rters (VSIs) are increasingly appl ied in many industrial applications such as mot or driv es, uninter- ruptible power supplies (UPSs), frequency converters, and ac- tive filters [1,2]. The main job of voltage source inverters is to synthesize AC output voltage and frequency from a constant DC voltage via pulse-width modulation technique. Pulse-width modulation (PWM) techniques have been studied extensively during the last few decades. A large variet y of methods , differ- ing in concept and performance, have bee n developed to achieve the following aims: wide linear modulation range, few- er switching losses, less total harmonic distortion (THD), easy implementati on, and less computation time [3,4]. Driving voltage source inverter is made by one of two pop- ular PWM approac hes, namely the sinusoidal PWM approach (SPWM) or space vect or PWM approach (SVPWM). In SPWM technique, the refer ence modulation wave is compare d with a triangular carrier wave, and the intersections define the switching instants. Within every carrier cycle, the average value of the output voltage becomes equal to the refere nce value. In SVPWM scheme, the reference voltage space vector is realized by switching between the neares t three inverter voltage space vector s which form the sector in which the reference vector resides. Each of the combined inverter voltage space vector is realized by switching a combination of the individual inverter voltage space vectors [5] . Many methods have been developed to impl ement the SVPWM for driving VSI’s. Generally, the SVPWM implemen- * Corresponding author. Mobile: +20 1095540 075. E-mail addresse s: [email protected] (M. Gaballah), drmoh_ [email protected] (M. El-Bardi ni). Peer review under responsibility of Ain Shams University. Production and hosting by Elsevier Ain Shams Engineering Journal (2013) 4, 763–774 Ain Shams University Ain Shams Engineering Journal www.elsevier.com/locate/asej www.sciencedirect.com 2090-4479 2013 Ain Shams University. Production and hosting by Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.asej.2013.02.004

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Page 1: Low Cost Digital Signal Generation for Driving Space Vector Pwm Inverter

8/12/2019 Low Cost Digital Signal Generation for Driving Space Vector Pwm Inverter

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http://dx.doi.org/10.1016/j.asej.2013.02.004

http://www.sciencedirect.com/science/journal/20904479

http://dx.doi.org/10.1016/j.asej.2013.02.004

mailto:drmoh_%[email protected]

mailto:[email protected]

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