Sliding-Mode Control of a Quadratic Buck Converter With Constant Power Load
Loading...
Date
2022
Authors
Torres Pinzón, Carlos Andrés
Flores Bahamonde, Freddy
Garriga Castillo, Juan Antonio
Valderrama Blavi, Hugo
Martínez Salamero, Luis
Other authors
Impact
Export
Share
Journal Title
Journal ISSN
Volume Title
Abstract
This paper analyzes for the first time a two-loop sliding-mode control (SMC) of a high-order
converter supplying a constant power load (CPL). The converter is a single-switch quadratic buck structure (QBC) interfacing a domestic 380 V DC bus to a CPL requiring a regulated voltage of 48 V DC. The
converter is unstable in the absence of control and even after the insertion of an inner loop based on SMC
of the input inductor current. The addition of an appropriate linear outer loop establishing the reference to
the inner loop stabilizes the system and provides output voltage regulation. The regulated QBC shows a
fast recovery of the output voltage with negligible overshoot in response to step-type changes of the output
power or the input voltage. It is also shown that the implemented regulator for CPL supply can be used
directly in the case of a constant current load (CCL) or a constant resistance load (CRL) resulting in similar
performance to the CPL case. PSIM simulations and experimental results in a 400 W prototype are in good
agreement with theoretical predictions.
Citation
Journal or Serie
IEEE Access, 2022, vol. 10, p. 71837-71852