2026-04-17T02:44:40Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/204572026-01-21T10:33:21Zcom_2072_1033col_2072_452950

Improved switching strategy for selective harmonic elimination in DC-AC signal generation via pulse-width modulation Palacios Quiñonero, Francisco Vicente Rodrigo, Jesús Molina Hernández, M. Antonia Karimi, Hamid Reza 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 Àrees temàtiques de la UPC::Enginyeria electrònica Walsh functions Harmonic analysis Electric current converters Walsh, Funcions de Anàlisi harmònica Convertidors de corrent elèctric 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. Peer Reviewed Postprint (published version) 2013 Article Palacios-Quiñonero, F. [et al.]. Improved switching strategy for selective harmonic elimination in DC-AC signal generation via pulse-width modulation. "Abstract and applied analysis", 2013, vol. 2013, núm. ID 870904, p. 1-13. 1085-3375 https://hdl.handle.net/2117/20457 10.1155/2013/870904 eng http://www.hindawi.com/journals/aaa/2013/870904/cta/ http://creativecommons.org/licenses/by/3.0/es/ Open Access Attribution 3.0 Spain 13 p. application/pdf