Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Nonaveraged control‐oriented modeling and relative stability analysis of DC‐DC switching converters

  • Dades identificatives

    Identificador: imarina:5132876
    Autors:
    Al-Turki Y., El Aroudi A., Mandal K., Giaouris D., Abusorrah A., Al Hindawi M., Banerjee S.
    Resum:
    This paper presents a unified and exact nonaveraged approach to derive a frequency‐domain control‐oriented model for accurate prediction of the fast timescale dynamics and performances of switching converters with fixed frequency naturally sampled pulse width modulation and integrating feedback loop. Because the approach avoids averaging and approximations related to this process, a very good accuracy of the derived model is obtained. The main difference between the presented approach and the existing methodology for accurately predicting the behavior of switching converters is that, here, we break the feedback loop and we focus on analyzing the open‐loop gain and the effect of the system parameters on relative stability. This results in an approach much similar to control systems techniques rather than nonlinear dynamical system approaches. Consequently, the relative stability is tackled easily in the frequency domain. In particular, by treating the modulator as a gain depending on the operating point, the new model is formulated in such a way that standard control‐oriented tools such as Bode diagrams and root‐loci can be easily used. Therefore, the proposed approach gives some important issues like gain and phase margins that are highly useful in controller design. It is noticed that the crossover frequency, gain, and phase margins predicted by using the averaged model may deviate significantly from the actual values given by the proposed approach. The paper points out the sources of discrepancies and the theoretical results are validated by simulations using a circuit‐level switched model.
  • Altres:

    Autor segons l'article: Al-Turki Y., El Aroudi A., Mandal K., Giaouris D., Abusorrah A., Al Hindawi M., Banerjee S.
    Departament: Enginyeria Electrònica, Elèctrica i Automàtica
    Autor/s de la URV: El Aroudi Chaoui, Abdelali
    Paraules clau: Switching converters Stability analysis Pwm control Nonaveraged modeling Control-oriented modeling
    Resum: This paper presents a unified and exact nonaveraged approach to derive a frequency‐domain control‐oriented model for accurate prediction of the fast timescale dynamics and performances of switching converters with fixed frequency naturally sampled pulse width modulation and integrating feedback loop. Because the approach avoids averaging and approximations related to this process, a very good accuracy of the derived model is obtained. The main difference between the presented approach and the existing methodology for accurately predicting the behavior of switching converters is that, here, we break the feedback loop and we focus on analyzing the open‐loop gain and the effect of the system parameters on relative stability. This results in an approach much similar to control systems techniques rather than nonlinear dynamical system approaches. Consequently, the relative stability is tackled easily in the frequency domain. In particular, by treating the modulator as a gain depending on the operating point, the new model is formulated in such a way that standard control‐oriented tools such as Bode diagrams and root‐loci can be easily used. Therefore, the proposed approach gives some important issues like gain and phase margins that are highly useful in controller design. It is noticed that the crossover frequency, gain, and phase margins predicted by using the averaged model may deviate significantly from the actual values given by the proposed approach. The paper points out the sources of discrepancies and the theoretical results are validated by simulations using a circuit‐level switched model.
    Àrees temàtiques: Engineering, electrical & electronic Engenharias iv Electronic, optical and magnetic materials Electrical and electronic engineering Computer science applications Astronomia / física Applied mathematics
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 00989886
    Adreça de correu electrònic de l'autor: abdelali.elaroudi@urv.cat
    Identificador de l'autor: 0000-0001-9103-7762
    Data d'alta del registre: 2024-09-07
    Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
    Enllaç font original: https://onlinelibrary.wiley.com/doi/abs/10.1002/cta.2387
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: International Journal Of Circuit Theory And Applications. 46 (3): 565-580
    Referència de l'ítem segons les normes APA: Al-Turki Y., El Aroudi A., Mandal K., Giaouris D., Abusorrah A., Al Hindawi M., Banerjee S. (2018). Nonaveraged control‐oriented modeling and relative stability analysis of DC‐DC switching converters. International Journal Of Circuit Theory And Applications, 46(3), 565-580. DOI: 10.1002/cta.2387
    DOI de l'article: 10.1002/cta.2387
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2018
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Applied Mathematics,Computer Science Applications,Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials,Engineering, Electrical & Electronic
    Switching converters
    Stability analysis
    Pwm control
    Nonaveraged modeling
    Control-oriented modeling
    Engineering, electrical & electronic
    Engenharias iv
    Electronic, optical and magnetic materials
    Electrical and electronic engineering
    Computer science applications
    Astronomia / física
    Applied mathematics
  • Documents:

  • Cerca a google

    Search to google scholar