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.
International Journal of Computer Applications in Technology, 2012 Vol.45 No.1, pp.15 - 27
Published online: 30 Oct 2012 *Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article