Title: LQR-based control of parallel-connected boost dc-dc converters: a comparison with classical current-mode control

Authors: M.R.D. Al-Mothafar; S.M. Radaideh; M.A. Abdullah

Addresses: Department of Electrical Engineering, Jordan University of Science and Technology, Irbid 22110, Jordan ' Department of Electrical Engineering, Jordan University of Science and Technology, Irbid 22110, Jordan ' Department of Energy Conversion, Universiti Teknologi Malaysia, Skudai 81300, Johor, Malaysia

Abstract: This work investigates the application of the Linear Quadratic Regulator (LQR) technique to a two-module parallel-connected Current-Mode-Controlled (CMC) Pulse-Width-Modulated (PWM) dc-dc boost converter operating in the continuous conduction mode. New feedback controllers are designed for the modular step-up converter under two different control schemes. The dynamic responses are compared with those obtained using the classical control approach. The role of LQR-based control in providing equal-current sharing among the constituent modules is addressed. Cycle-by-cycle simulations are carried out to validate the analysis.

Keywords: switching power supplies; modular converters; DC-DC converters; LQR; linear quadratic regulators; CMC; current mode control; feedback control; controller design; simulation.

DOI: 10.1504/IJCAT.2012.050129

International Journal of Computer Applications in Technology, 2012 Vol.45 No.1, pp.15 - 27

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 30 Oct 2012 *

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