Min-Type Control Strategy of a DC-DC Synchronous Boost Converter

Identifier:  imarina:6051413

Handle: https://hdl.handle.net/20.500.11797/imarina6051413

Authors:  Sferlazza, A; Albea-Sanchez, C; Martínez-Salamero, L; García, G; Alonso, C

Abstract:
This paper presents the analysis and design of a min-type strategy to control a synchronous boost converter in continuous conduction mode. The strategy uses a nonlinear switching surface to establish the change of topology in the converter and is analyzed by means of a sliding-mode control approach. Subsequently, the min-type strategy is modified by a hybrid control formulation, which introduces a hysteresis width and a dwell-time to obtain a finite switching frequency in the start-up and steady-state, respectively. The hybrid control formulation is implemented digitally by means of a microprocessor which processes the samples of inductor current and capacitor voltage to provide the control signal that activates the power switch. Experimental results in a prototype validate the proposed control strategy and show its potential in transient time and steady-state.