Analysis and Design of a Controller for an Input-Saturated DC–DC Buck Power Converter

Garćıa-Alarćon, Octavio; Moreno–Valenzuela, Javier

doi:10.1109/access.2019.2912858

Cited by 8 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Inequalities (18) and (19), introduced below, give sufficient conditions related with the physical parameter to assure the positiveness of inequality (14), which in turn assures the positiveness of V .…”

Section: Shaping the Family Of Pi-type Controllersmentioning

confidence: 99%

See 1 more Smart Citation

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

et al. 2021

Self Cite

View full text Add to dashboard Cite

Departing from analyzing a general input-saturated second-order system, a Lyapunov-based constructive procedure for the output-feedback stabilization of the constantly perturbed DC-DC buck power converter is presented. The proposed scheme also incorporates a Σ-∆ modulator. The obtained control scheme is developed in two parts: a proportional-integral-type family of algorithms devoted to regulating the uncertain system by using measurements of the output voltage and a Σ-∆ modulator dedicated to transforming the control action into a {0, 1} discrete-valued signal. This modulator is a kind of a sliding controller, which can be seen as a subsystem with an on-off output. This combination, the PI-type family of controllers and the Σ-∆ modulator, assures the global stability of the closed-loop system, even if parametric uncertainties are presented. The convergence analysis was carried out using Lyapunov's method. The theoretical results are confirmed using real-time experimental tests, which demonstrate the anti-windup scheme and the Σ-∆ modulator efficiency. The experiments consider the saturation of the control input and disturbances, having obtained convincing results. INDEX TERMS DC-DC buck converter; Lyapunov's method; saturation control; Σ-∆ modulator; experimental results Recently, efficient control strategies have been designed for several types of power converters. A discontinuous con

show abstract

Section: Shaping the Family Of Pi-type Controllersmentioning

confidence: 99%

“…However, due to several factors such as limitations in designed circuitry, the lower and higher input limits can be higher than 0% and lower than 100%, respectively. See, for example, [11], [12] [13], [14]. Actually, the saturation of the duty cycle in power converters appears in the circuitry that enables the transistor gate.…”

Section: Introductionmentioning

confidence: 99%

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…1, a typical PWM based DC-DC buck converter is presented. It comprises an input dc voltage source V in , a PWM gate drive controlled switch VT , a diode VD, a filter inductor L, a filter capacitor C and a load resistance R. According to the Kirchhoff's Voltage Law and Kirchhoff's Current Law, the average model is presented as follows [24], [25]:…”

Section: A Dynamic Models Of Dc-dc Buck Convertersmentioning

confidence: 99%

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

2019

View full text Add to dashboard Cite

This paper deals with the output voltage regulation problem for dc-dc buck converters. Overcurrent protection and disturbances are both taken into consideration. The main challenge of control design is how to ensure that the current constraints are not violated at any time in the presence of disturbances. At first, a high-gain disturbance observer is utilized to estimate the disturbances. Then, a novel punishment mechanism for the inductor current is designed in the control scheme. Finally, based on the novel current-constrained technique and the high-gain disturbance observer, a composite control approach is proposed. The new control method not only guarantees the current within the required range but also has a nice ability on the disturbance rejection. In the meantime, rigorous stability proof is also presented. The theoretical analysis also explains how disturbances affect the satisfaction of the current constraints. The experimental results on a buck converter system are illustrated to verify the feasibility and effectiveness of the proposed control scheme.INDEX TERMS DC-DC buck converter, overcurrent protection, current-constrained controller, disturbance observer.

show abstract

“…The sudden increase in voltage will damage the PMSMs drive systems and affect the normal use of the PMSMs in acute cases. A bounded saturation function was used to solve the input saturation problem [21]- [23]. In [24], [25], the function approximation method was proposed to compensate actuator saturation nonlinearity.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Fuzzy Observer-Based Command Filtered Discrete-Time Control for PMSMs With Input Constraint

Liu

Lei

et al. 2021

IEEE Access

View full text Add to dashboard Cite

This paper proposes an adaptive fuzzy observer-based command filtered discrete-time control method for permanent magnet synchronous motors (PMSMs) with input constraint. First, the rotor angular velocity is estimated by using an adaptive fuzzy observer, and the unknown nonlinear function is approximated by using fuzzy logic systems (FLSs) in the PMSMs drive systems. Then, compared with the traditional backstepping method, command filtered backstepping method is developed to solve the "complexity of computation" problem. It is shown that all signals of the closed-loop system are semiglobally uniformly ultimately bounded. Finally, the results of the simulation and experiment demonstrate that the new design method can fully consider the influence of input constraint and load disturbance, and improve the tracking performance for PMSMs drive systems.

show abstract

Analysis and Design of a Controller for an Input-Saturated DC–DC Buck Power Converter

Cited by 8 publications

References 35 publications

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

PI-Type Controllers and Σ–Δ Modulation for Saturated DC-DC Buck Power Converters

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

Adaptive Fuzzy Observer-Based Command Filtered Discrete-Time Control for PMSMs With Input Constraint

Contact Info

Product

Resources

About