Application of LQR theory to modular current-programmed buck converters. (1st January 2015)

• Record Type: Journal Article
• Authors: Al-Mothafar, Mohammed R.D.; Radaideh, Saleh M.; Radaydeh, Nuha M.
• Is Part Of: International journal of engineering systems modelling and simulation. Volume 7:Number 1(2015)
• Page Start: 6
• Page End: 21
• Publication Date: 2015-01-01
• Subjects: linear-quadratic regulator -- LQR -- modular dc-dc converters -- switching power supplies -- current-mode control -- CMC; Engineering systems -- Computer simulation -- Periodicals; Engineering systems -- Mathematical models -- Periodicals; 620.0042
• DOI: 10.1504/IJESMS.2015.066123
• Languages: English
• ISSNs: 1755-9758

Abstract

This paper investigates the application of the linear-quadratic regulator (LQR) theory to modular current-mode-controlled (CMC) pulse-width-modulated (PWM) dc-dc converters operating in the continuous conduction mode. Small-signal models are used in conjunction with the LQR technique to design new feedback controllers for a two-module parallel-input series-output step-down (buck) dc-dc converter under two different control schemes. The dynamic responses are compared with those obtained using the classical control approach. Cycle-by-cycle simulations are performed to validate the analysis.