Title :
A novel method for harmonics and low switching-frequency eliminations for a three-phase PWM inverter
Author :
Bouchhida, O. ; Tlemçani, A. ; Boudana, D. ; Benmansour, K. ; Cherifi, A. ; Boucherit, M.S.
Author_Institution :
Lab. of Robot., IUT Mantes-en-Yvelines, Mantes-la-Jolie
Abstract :
Harmonics and switching frequency cause a major problem in power system. A novel harmonic elimination technique and low switching frequency in a three-phase pulse width modulation (PWM) inverter are proposed in this paper. This inverter is associated with a LC filter. The technique determines the commutation angles based by solving a set of nonlinear system equations. This commutation angles are determined off-line (Pre-Calculed) and stored in the microcontroller memory in order to speed up the online control of the processes. The pre-calculated switching is modelled to cancel the greater part of low-order harmonics and to keep a single-pole dc voltage across the polarized capacitors. 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 switching-frequency per period. Consequently, the duties of the semiconductor power switches are alleviated. To show the validity of the new harmonic elimination and low switching-frequency, DSP based experimental results are presented. These results are very satisfactory and prove the effectiveness of the new approach.
Keywords :
PWM invertors; harmonics suppression; power filters; LC filter; harmonic elimination technique; low switching-frequency eliminations; microcontroller memory; nonlinear system equations; power system; semiconductor power switches; three-phase PWM inverter; three-phase pulse width modulation inverter; Nonlinear equations; Nonlinear systems; Power harmonic filters; Power semiconductor switches; Power system harmonics; Pulse inverters; Pulse power systems; Pulse width modulation inverters; Switching frequency; Voltage; Harmonics elimination; PWM Inverter; dSPACE kit DS1103; switching frequency;
Conference_Titel :
Systems, Signals and Devices, 2008. IEEE SSD 2008. 5th International Multi-Conference on
Conference_Location :
Amman
Print_ISBN :
978-1-4244-2205-0
Electronic_ISBN :
978-1-4244-2206-7
DOI :
10.1109/SSD.2008.4632777