Analysis and Design Aspects of Min-Type Switching Control Strategies for Synchronous Buck–Boost Converter

This paper presents a comparative study among switching control strategies for Buck–Boost converters, taking into account essential aspects in practical implementations, as the switching frequency variation concerning different output voltages and the responses in the transient and steady-states. Mo...

Full description

Saved in:
Bibliographic Details
Published in:Energies (Basel) 2022-04, Vol.15 (7), p.2302
Main Authors: Mesquita da Silva, Julio Alves, Deaecto, Grace Silva, Barros, Tarcio Andre dos Santos
Format: Article
Language:English
Subjects:
Comparative studies
Control methods
Controllers
Converters
DC–DC power converters
Efficiency
Equilibrium
Error correction
Frequency control
Frequency variation
Load fluctuation
Loss reduction
power electronics
Pulse duration modulation
Redesign
robust control
switched systems
switching frequency
Variation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents a comparative study among switching control strategies for Buck–Boost converters, taking into account essential aspects in practical implementations, as the switching frequency variation concerning different output voltages and the responses in the transient and steady-states. More specifically, we have considered three switching strategies of min-type, where two of them permit high switching frequencies, while the other considers a limited frequency control strategy. Moreover, we have generalized the control techniques available in the literature to make them able to operate under changes in the equilibrium points without the need for a redesign. A conventional PI controller based on pulse-width modulation (PWM) is adopted for comparison purposes. In contrast to PWM-based control, which operates in the maximum switching frequency, the min-type strategies present variation in the switching frequency that depends on the operation point and may lead to a power loss reduction when compared to conventional techniques. To assure zero-error operation in the steady-state, a correction method is proposed. Experimental tests were made to compare the transient and steady-state responses of these control methodologies, verify the variation of the switching frequency according to the output voltages and the robustness concerning load variations.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15072302