Article: Real-time implementation of harmonic elimination PWM technique for induction motor Journal: International Journal of Modelling, Identification and Control (IJMIC) 2008 Vol.5 No.2 pp.127 - 135 Abstract: This paper presents a new method to decrease the switching frequency of novel harmonic elimination Pulse Width Modulated (PWM) strategy for three-phase inverter. The torque ripple of the induction motor can be dramatically reduced by the new PWM technique. The three-phase inverter is associated with a passive LC filter. The commutation angles are predetermined off-line and stored in the microcontroller memory in order to speed up the induction motors on line control. Precalculated switching is modelled to cancel the greater part of low-order harmonics and to keep a single-pole dc voltage across the polarised capacitors. A passive LC filter is designed to cancel the high-order harmonics. This approach allows substantial reduction of the harmonic ratio in the ac main output voltage without increasing the number of switches per period. Consequently, the duties of the semiconductor power switches are alleviated. Simulation results are presented in order to illustrate such algorithm performance. To show the validity of our approach, DSP-based experimental results are presented. Inderscience Publishers - linking academia, business and industry through research

Title: Real-time implementation of harmonic elimination PWM technique for induction motor

Authors: Ouahid Bouchhida, Khelifa Benmansour, Abderrezzek Cherifi, Mohamed Seghir Boucherit

Addresses: Laboratoire de Commande des Processus, Departement du Genie Electrique, Ecole Polytechnique, 10, ave Hassen Badi, BP. 182, El-Harrach Alger, Algerie. ' Laboratoire de Commande des Processus, Departement du Genie Electrique, Ecole Polytechnique, 10, ave Hassen Badi, BP. 182, El-Harrach Alger, Algerie. ' Laboratory of Robotics, IUT Mantes-en-Yvelines, 7 rue Jean Hoet, Mantes-la-Jolie 78200, France. ' Laboratoire de Commande des Processus, Departement du Genie Electrique, Ecole Polytechnique, 10, ave Hassen Badi, BP. 182, El-Harrach Alger, Algerie

Abstract: This paper presents a new method to decrease the switching frequency of novel harmonic elimination Pulse Width Modulated (PWM) strategy for three-phase inverter. The torque ripple of the induction motor can be dramatically reduced by the new PWM technique. The three-phase inverter is associated with a passive LC filter. The commutation angles are predetermined off-line and stored in the microcontroller memory in order to speed up the induction motors on line control. Precalculated switching is modelled to cancel the greater part of low-order harmonics and to keep a single-pole dc voltage across the polarised capacitors. A passive LC filter is designed to cancel the high-order harmonics. This approach allows substantial reduction of the harmonic ratio in the ac main output voltage without increasing the number of switches per period. Consequently, the duties of the semiconductor power switches are alleviated. Simulation results are presented in order to illustrate such algorithm performance. To show the validity of our approach, DSP-based experimental results are presented.

Keywords: PWM inverters; harmonics elimination; switching frequency; induction motors; motor control; torque ripple; dSPACE kit DS1103; real-time implementation; modelling; LC filter.

DOI: 10.1504/IJMIC.2008.022018

International Journal of Modelling, Identification and Control, 2008 Vol.5 No.2, pp.127 - 135

Published online: 16 Dec 2008 *

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Title: Real-time implementation of harmonic elimination PWM technique for induction motor

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