Application of LQR theory to modular current-programmed buck converters
by Mohammed R.D. Al-Mothafar; Saleh M. Radaideh; Nuha M. Radaydeh
International Journal of Engineering Systems Modelling and Simulation (IJESMS), Vol. 7, No. 1, 2015

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.

Online publication date: Sat, 24-Jan-2015

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