Article
Hybrid control of power converters with affine models and pulse-width modulated inputs
Author/s | Albea-Sánchez, Carolina
Sferlazza, Antonino Gordillo Álvarez, Francisco Gómez-Estern Aguilar, Fabio |
Department | Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática |
Publication Date | 2021 |
Deposit Date | 2021-04-06 |
Published in |
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Abstract | In this paper, hybrid dynamical systems theory is applied to the analysis and control of switched converters with Pulse-Width Modulated (PWM) inputs. The system is described by a state-space model with continuous flows ... In this paper, hybrid dynamical systems theory is applied to the analysis and control of switched converters with Pulse-Width Modulated (PWM) inputs. The system is described by a state-space model with continuous flows and discrete jumps, without averaged equations. The modulation effects are captured in full without using time-dependent signals, by enlarging the state vector to include the PWM waveform generation process. Furthermore, the sample-and-hold mechanism associated with the sampling frequency is also taken into account with this approach. A control law is proposed based on a Lyapunov function candidate. Furthermore, convergence sets and the steady state jitter, inherent to PWM-based controllers, are analyzed estimating limit sets for the augmented state. Consequently output chattering can be bounded. By using hybrid control approaches, the control designer gains a deeper understanding of the effect of modulation in the closed-loop dynamics, avoiding the problems associated with the use averaged models. Experimental results validate the proposed method. |
Citation | Albea-Sánchez, C., Sferlazza, A., Gordillo Álvarez, F. y Gómez-Estern, F. (2021). Hybrid control of power converters with affine models and pulse-width modulated inputs. IEEE Transactions on Circuits and Systems I: Regular Papers |
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PWM_ST11_preprint.pdf | 2.695Mb | [PDF] | View/ | |