TY - JOUR
T1 - Multisampled Digital Average Current Controls of the Versatile Buck-Boost Converter
AU - Restrepo, Carlos
AU - Konjedic, Tine
AU - Flores-Bahamonde, Freddy
AU - Vidal-Idiarte, Enric
AU - Calvente, Javier
AU - Giral, Roberto
N1 - Funding Information:
Manuscript received April 4, 2018; revised September 26, 2018; accepted December 2, 2018. Date of publication December 20, 2018; date of current version May 1, 2019. This work was supported in part by the Chilean Government under Project CONICYT/FONDECYT 11150069, in part by the SERC Chile under Grant CONICYT/FONDAP/15110019, and in part by the Spanish Agencia Estatal de Investigación (AEI) and the Fondo Europeo de Desarrollo Regional (FEDER) under Project DPI2016-80491-R (AEI/FEDER, UE) and Project DPI2017-84572-C2-1-R (AEI/FEDER, UE). Recommended for publication by Associate Editor Dragan Maksimovic. (Corresponding author: Carlos Restrepo.) C. Restrepo is with the Department of Electromechanics and Energy Conversion, Universidad de Talca, Curicó 3340000, Chile (e-mail: [email protected]).
Publisher Copyright:
© 2013 IEEE.
PY - 2019/6
Y1 - 2019/6
N2 - The coupled-inductor buck-boost converter is a versatile dc-dc converter, which is suitable for performing different roles within the hybrid power systems. Its multiple advantageous features include noninverting voltage step-up/step-down characteristic, high efficiency, wide bandwidth control, ability to control the input and output voltages and currents, and so on. All the existing current control approaches for this type of converter are based on analog control implementation, which allows achieving high closed-loop bandwidth. However, analog control limits the possibilities for applying the advanced control schemes and algorithms for achieving smooth operating mode transitions. This paper proposes two digital current control strategies for a versatile buck-boost converter: a predictive average current control and a multisampled average current control. Both the proposed digital control strategies ensure fast tracking of the control set point, low steady-state error, and a practically undegraded dynamic response of the system in comparison with the analog average current control. The theoretical analyses have been validated by means of simulations and experimental tests performed on a 48-V 600-W purpose-built prototype.
AB - The coupled-inductor buck-boost converter is a versatile dc-dc converter, which is suitable for performing different roles within the hybrid power systems. Its multiple advantageous features include noninverting voltage step-up/step-down characteristic, high efficiency, wide bandwidth control, ability to control the input and output voltages and currents, and so on. All the existing current control approaches for this type of converter are based on analog control implementation, which allows achieving high closed-loop bandwidth. However, analog control limits the possibilities for applying the advanced control schemes and algorithms for achieving smooth operating mode transitions. This paper proposes two digital current control strategies for a versatile buck-boost converter: a predictive average current control and a multisampled average current control. Both the proposed digital control strategies ensure fast tracking of the control set point, low steady-state error, and a practically undegraded dynamic response of the system in comparison with the analog average current control. The theoretical analyses have been validated by means of simulations and experimental tests performed on a 48-V 600-W purpose-built prototype.
KW - Dead-zone avoidance
KW - digital control
KW - multisampled average current control (MACC)
KW - noninverting buck-boost converter
KW - predictive digital current programed control
KW - wide bandwidth
UR - http://www.scopus.com/inward/record.url?scp=85058995547&partnerID=8YFLogxK
U2 - 10.1109/JESTPE.2018.2888980
DO - 10.1109/JESTPE.2018.2888980
M3 - Article
AN - SCOPUS:85058995547
SN - 2168-6777
VL - 7
SP - 879
EP - 890
JO - IEEE Journal of Emerging and Selected Topics in Power Electronics
JF - IEEE Journal of Emerging and Selected Topics in Power Electronics
IS - 2
M1 - 8584492
ER -