Hybrid control scheme for a half-bridge inverter

2019 American Control Conference (ACC)

García

et al. 2019

Self Cite

In this work, we propose a hybrid adaptive control law for the half-bridge inverter subjected to the common problem of unknown load. This controller ensures the system robustness with respect to the output, taking into account the real nature of the signals, which means the continuous-time variables, (voltage and current signals) and the discrete-time variables, (switching signals). The adaptation is accomplished using a state observer and assuming that all states are measurable. Then, stability properties can be ensured using hybrid dynamical system theory and singular perturbation analysis. Finally, the proposed hybrid adaptive controller is validated in simulation. Index Terms-Half-bridge inverter, hybrid dynamical system, adaptive control, singular perturbation analysis.

Section: Introductionmentioning

confidence: 82%

Section: Remarkmentioning

confidence: 99%

Hybrid adaptive control for the half-bridge inverter

2019 American Control Conference (ACC)

García

et al. 2019

Self Cite

“…Note, that if η → 0, we get to reduce the switching frequency and on the contrary if η → 1, we increase the switching frequency. On the other hand, ifx = 0, we get arbitrary fast switches, that can be reduced using the space regularization propose by the authors in [14]. We comment here the behavior of any solution to hybrid system (10)- (16).…”

Section: Hybrid Model and Proposed Control Lawmentioning

confidence: 95%

Hybrid adaptive control of the boost converter

2017 IEEE 56th Annual Conference on Decision and Control (CDC)

García

2017

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This work proposes a control law for the boost converter with unknown constant resistive load. It focuses on Hybrid Dynamical System (HDS) theory, which considers the voltage and current signals as continuous-time variables and the switching signal as discrete-time variable. In several applications the voltage has to be constant. To ensure that the voltage value is robust with respect to any reference, an adaptive scheme is proposed. This adaptation is accomplished using a state observer and assuming that all states are accessible. Then, the full system stability can be established by using a singular perturbation analysis. The hybrid adaptive controller is tested in simulations.

“…withx + = x + − x e , and from G in (14), after each jump x + = x, leading tox + = x − x e =x. In (23), we get:…”

Section: Remarkmentioning

confidence: 99%

“…Recently, some control strategies have been proposed to directly control the switches without considering an averaged model, which led to discontinuous control laws. Among them, we can cite predictive control algorithms (for inverters in [8] and converters in [9]), sliding mode controllers (for inverters in [10] [11] and converters in [12] [13]) and hybrid controllers (for inverters in [14] and converters in [15]). For the case of the NPC, to the best of our knowledge, only a few papers have considered explicitly the discrete nature of the switches.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Control Law for a Three-Level NPC Rectifier

2019 18th European Control Conference (ECC)

Aguilar

et al. 2019

Self Cite

In this article, a hybrid control law is proposed for the three-phase three-level Neutral Point Clamped (NPC) converter working as a rectifier in order to regulate the output DC voltage. The control problem deals with the unbalance capacitor voltages as well as the phase currents. The proposed algorithm is based on the Hybrid Dynamical System theory, which takes into account the hybrid nature of the NPC converter, i.e., the continuous and discrete dynamics, ensuring uniform global asymptotic stability of the operating point. Finally, the effectiveness of the proposed control algorithm is validated in simulation. Index Terms-Three-phase three-level neutral point clamped converter, rectifier, hybrid dynamical system, nonlinear time-varying system.