Fast and Robust Nonlinear Deadbeat Current Control for Boost Converter

Abstract

This paper proposes a fast and robust nonlinear deadbeat control for boost DC-DC converters. First, the nonlinear state equation is derived, and second a nonlinear current reference deadbeat control is proposed. Third, a new nonlinear controller to implement the load disturbance compensation is proposed. After the simulations and verification by experiments, it was confirmed that under the conditions of an input voltage of 12 V, an output voltage of 20 V, a load resistance of 4 Ω and a sampling frequency of 100 kHz, the voltage command tracking capability of a settling time of 280 μs was achieved, and an output voltage recovery time of 1.46 ms was achieved for a sudden load change.

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

“…Thus, the two-phase buck converter is controlled by the given reference inductor currents, i Lref (k + 1), instead of the one sample advanced inductor currents, i L1 (k + 1) and i L2 (k + 1). Above all, the DB control laws are derived as ( 12) and (13).…”

“…According to reference (13), the stability of the entire system is increased by setting the value of the inductance in the controller (L ctrl ) to be smaller than in the inductance in the plant (L). In this study, L ctrl is set to be 40% of L by the trial and error approach.…”

Finite-Time Current Tracking in Boost Converters by Using a Saturated Super-Twisting Algorithm

“…Under Assumptions 1 and 2, the task is to ensure that the inductor current i tracks the desired inductor current i * exactly by using a SSTA controller after a finite transient, i.e., the problem resides on to stabilize in finite-time the current error (12), i(t) ⟶ i * (t) for all t ≥ t r , where t r is the reaching time, by using a continuous control law u(t).…”

“…Theorem 2. Consider the error dynamics of the inductor current in the boost converter (12), with a bounded Lipschitz perturbation ϕ 1 (t), such that…”

“…e natural operation of power converters requires that the control variable takes values from a discrete set. Several efforts to control power converters involving discrete components, integrated circuits, and/or pulse width modulation (PWM) have been reported in the literature [8][9][10][11][12][13][14][15][16], where schemes based on PI, passivity, adaptive backstepping, fuzzy logic, deadbeat, H-infinity, or model predictive control are used.…”