Autor según el artículo: Vidal-Idiarte E; Marcos-Pastor A; Giral R; Calvente J; Martinez-Salamero L
Departamento: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/es de la URV: Calvente Calvo, Francisco Javier / Giral Castillon, Roberto / Martínez Salamero, Luis / Vidal Idiarte, Enric
Palabras clave: Voltage reference Voltage control Variable structure systems Synchronous buck converter Small signal model Sliding mode equations Pwm power convertors Pulse width modulation control Pulse width modulation Power converters Inductor currents Heterojunction bipolar transistors Discrete-time sliding mode Direct-digital design Digital control Difference equations Dc-dc converters
Resumen: A discrete-time sliding mode approach allowing direct digital design of a pulse width modulation (PWM) control of a synchronous buck converter is presented in this study. Without the need of a compensating ramp, a non-linear difference equation representing the output voltage dynamic behaviour is employed to demonstrate the global stability of the internal control loop of the inductor current. Discrete-time small-signal model is derived from the linearisation of the ideal sliding-mode equations, which facilitates the design of the output voltage controller. This model exhibits a zero whose value depends on the operating point coordinates and explains the duty cycle delay associated to digitally PWM controlled converters. The validity of the transfer function is demonstrated through simulation by comparing its frequency behaviour with that obtained from the more accurate switched model of the converter. Experimental results for start-up, load and line perturbations, current and voltage reference variations in a 25 W prototype switching at 100 kHz are in good agreement with the theoretical predictions. © The Institution of Engineering and Technology.
Áreas temáticas: Engineering, electrical & electronic Engenharias iv Engenharias iii Electrical and electronic engineering
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: roberto.giral@urv.cat javier.calvente@urv.cat enric.vidal@urv.cat
Identificador del autor: 0000-0001-6582-6741 0000-0001-8012-1889 0000-0002-6016-4096
Fecha de alta del registro: 2024-09-07
Versión del articulo depositado: info:eu-repo/semantics/submittedVersion
Enlace a la fuente original: https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/iet-pel.2016.0975
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
Referencia al articulo segun fuente origial: Iet Power Electronics. 10 (13): 1714-1720
Referencia de l'ítem segons les normes APA: Vidal-Idiarte E; Marcos-Pastor A; Giral R; Calvente J; Martinez-Salamero L (2017). Direct digital design of a sliding mode-based control of a PWM synchronous buck converter. Iet Power Electronics, 10(13), 1714-1720. DOI: 10.1049/iet-pel.2016.0975
DOI del artículo: 10.1049/iet-pel.2016.0975
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2017
Tipo de publicación: Journal Publications