Author, as appears in the article.: Madrid E; Murillo-Yarce D; Restrepo C; Muñoz J; Giral R

Department: Enginyeria Electrònica, Elèctrica i Automàtica

URV's Author/s: Giral Castillon, Roberto

Keywords: Pwm converters High-order switched converters Full-order dynamic models Discontinuous conduction mode implementation hybrid high-order switched converters full-order dynamic models

Abstract: High-order switched DC-DC converters, such as SEPIC, Ćuk and Zeta, are classic energy processing elements, which can be used in a wide variety of applications due to their capacity to step-up and/or step-down voltage characteristic. In this paper, a novel methodology for analyzing the previous converters operating in discontinuous conduction mode (DCM) is applied to obtain full-order dynamic models. The analysis is based on the fact that inductor currents have three differentiated operating sub-intervals characterized by a third one in which both currents become equal, which implies that the current flowing through the diode is zero (DCM). Under a small voltage ripple hypothesis, the currents of all three converters have similar current piecewise linear shapes that allow us to use a graphical method based on the triangular shape of the diode current to obtain the respective non-linear average models. The models’ linearization around their steady-state operating points yields full-order small-signal models that reproduce accurately the dynamic behavior of the corresponding switched model. The proposed methodology is applicable to the proposed converters and has also been extended to more complex topologies with magnetic coupling between inductors and/or an RC damping network in parallel with the intermediate capacitor. Several tests were carried out using simulation, hardware-in-the-loop, and using an experimental prototype. All the results validate the theoretical models.

Thematic Areas: Zootecnia / recursos pesqueiros Química Medicine (miscellaneous) Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Linguística e literatura Letras / linguística Interdisciplinar Instruments & instrumentation Instrumentation Information systems Geografía Geociências Farmacia Engineering, electrical & electronic Engenharias iv Engenharias iii Engenharias ii Engenharias i Electrochemistry Electrical and electronic engineering Educação física Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, analytical Biotecnología Biodiversidade Biochemistry Atomic and molecular physics, and optics Astronomia / física Arquitetura, urbanismo e design Analytical chemistry

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: roberto.giral@urv.cat

Author identifier: 0000-0001-6582-6741

Record's date: 2023-02-19

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://www.mdpi.com/1424-8220/21/22/7434

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Sensors. 21 (22):

APA: Madrid E; Murillo-Yarce D; Restrepo C; Muñoz J; Giral R (2021). Modelling of sepic, Ćuk and zeta converters in discontinuous conduction mode and performance evaluation. Sensors, 21(22), -. DOI: 10.3390/s21227434

Article's DOI: 10.3390/s21227434

Entity: Universitat Rovira i Virgili

Journal publication year: 2021

Publication Type: Journal Publications