Improved Switching Strategy for Selective Harmonic Elimination in DC-AC Signal Generation via Pulse-Width Modulation
| Autor: | Hamid Reza Karimi, Maria A. Molina-Hernández, Francisco Palacios-Quiñonero, Jesus Vicente-Rodrigo |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III, Universitat Politècnica de Catalunya. Departament de Disseny i Programació de Sistemes Electrònics, Universitat Politècnica de Catalunya. CoDAlab - Control, Modelització, Identificació i Aplicacions |
| Rok vydání: | 2013 |
| Předmět: |
Total harmonic distortion
Optimization problem Article Subject lcsh:Mathematics Applied Mathematics Enginyeria electrònica [Àrees temàtiques de la UPC] Anàlisi harmònica Interval (mathematics) lcsh:QA1-939 VDP::Mathematics and natural science: 400::Mathematics: 410::Analysis: 411 Signal Electric current converters Harmonic analysis Amplitude Hadamard transform Control theory Convertidors de corrent elèctric Walsh Funcions de Walsh functions Analysis Pulse-width modulation Linear equation Mathematics |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Abstract and Applied Analysis Abstr. Appl. Anal. UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Abstract and Applied Analysis, Vol 2013 (2013) |
| ISSN: | 1687-0409 1085-3375 |
| Popis: | Published version of an article in the journal: Abstract and Applied Analysis. Also available from the publisher at: http://dx.doi.org/10.1155/2013/870904 Open Access We present an advanced design methodology for pulse-width-modulated (PWM) DC-AC signal generation. Using design methods based on the Walsh transform, AC sinusoidal signals can be approximated by suitable PWM signals. For different AC amplitudes, the switching instants of the PWM signals can be efficiently computed by using appropriate systems of explicit linear equations. However, the equation systems provided by conventional implementations of this approach are typically only valid for a restricted interval of AC amplitudes and, in general, a supervised implementation of several equation systems is necessary to cover the full AC amplitude range. Additionally, obtaining suitable equation systems for designs with a large number of switching instants requires solving a complex optimization problem. In defining the constitutive pulses of a PWM signal, a suitable partition of the time interval is used as a reference system. In the new methodology, pulses are chosen to be symmetric with respect to the partition points, and the switching times are specified by means of switching ratios with respect to the endpoint subintervals. This approach leads to particularly simple Walsh series representations, introduces a remarkable computational simplification, and achieves excellent results in reducing the harmonic distortion. |
| Databáze: | OpenAIRE |
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