Finite-time output feedback control for DC-DC buck power converters system

Overcurrent Protection Control Design for DC-DC Buck Converter With Disturbances

“…Similar to the conclusion reached by the simulations, when the reference output voltage is a time-varying signal, the closed-loop system under the proposed composite controller (17) has better dynamic performance and anti-interference performance than that of the closed-loop system under the controller (18). Combined with the above simulation and experimental results, it can be seen that the proposed composite controller can not only restrict the inductor current in the DC-DC buck converter system, but also improve the anti-disturbance performance of the closed-loop system.…”

“…In the process of tracking the ramp signal, the peak currents of these two closed-loop systems are both less than the constraint value 3A. However, the dynamic performance of the closed-loop system under the proposed composite controller (17) is much better than that of the closed-loop system under the controller (18). Meanwhile, the anti-disturbance performance of the proposed composite controller ( 17) is also better than that of the controller (18).…”

“…In this section, simulation and experimental results are illustrated to verify the feasibility and effectiveness of the proposed control scheme for DC-DC buck converters with the current constraint and disturbances. A composite controller (18) consisting of the current-constrained controller (CC) and an integral link is compared here to show the property of the proposed control scheme, especially in current-constraint property and disturbance-rejection property. In order to clearly demonstrate the closed-loop performance of the controllers in terms of current constraint and disturbance rejection, the emphasis of the comparisons will be on the phase of startup and the phase of a sudden change in the input voltage.…”

“…The disturbances are handled by the integral term of voltage tracking error. However, the stability analysis of the closed-loop system is not given under the controller (18). In this paper, the proposed controller ( 8) is a further improvement than the controller ( 18) by utilizing HGDOB.…”

High Performance Transient Response of High/Low Pulse Voltage using Two-Phase Interleaved DC-DC Buck Converter under Half Sampling Time Deadbeat Control

“…However, vector B, used in (1), changes depending on each circuit mode as (3). The continuous state equations of the circuit, (1), is analytically obtained as (4).…”