Documents disponibles écrits par cet auteur

Adaptive grid-voltage sensorless control scheme for inverter-based distributed generation / Mohamed, Y.A.-R.I. in IEEE transactions on energy conversion, Vol. 24 N° 3 (Septembre 2009) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 683 - 694 Titre : Adaptive grid-voltage sensorless control scheme for inverter-based distributed generation Type de document : texte imprimé Auteurs : Mohamed, Y.A.-R.I., Auteur ; Ehab F. El-Saadany, Auteur ; Salama, M.M.A., Auteur Année de publication : 2010 Article en page(s) : pp. 683 - 694 Note générale : Energy Conversion Langues : Anglais (eng) Mots-clés : PWM  invertors--Digital  control--Low-power  electronics--Power  control Résumé : This paper presents an adaptive grid-voltage sensorless control scheme for inverter-based distributed generation units based on an adaptive grid-interfacing model. An adaptive grid-interfacing model is proposed to estimate, in real time, the interfacing parameters seen by the inverter and the grid-voltage vector simultaneously. A reliable solution to the present nonlinear estimation problem is presented by combining a grid-voltage estimator with an interfacing parameter estimator in a parallel structure. Both estimators adjust the grid-interfacing model in a manner that minimizes the current error between the grid model and the actual current dynamics, which acts as a reference model. The estimated quantities are utilized within the inner high-bandwidth current control loop and the outer power controller to realize an adaptive grid-voltage sensorless interfacing scheme. Theoretical analysis and simulation results are provided to demonstrate the validity and usefulness of the proposed interfacing scheme. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5075661&sortType%3Das [...] [article] Adaptive grid-voltage sensorless control scheme for inverter-based distributed generation [texte imprimé] / Mohamed, Y.A.-R.I., Auteur ; Ehab F. El-Saadany, Auteur ; Salama, M.M.A., Auteur . - 2010 . - pp. 683 - 694. Energy Conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 24 N° 3 (Septembre 2009) . - pp. 683 - 694 Mots-clés : PWM  invertors--Digital  control--Low-power  electronics--Power  control Résumé : This paper presents an adaptive grid-voltage sensorless control scheme for inverter-based distributed generation units based on an adaptive grid-interfacing model. An adaptive grid-interfacing model is proposed to estimate, in real time, the interfacing parameters seen by the inverter and the grid-voltage vector simultaneously. A reliable solution to the present nonlinear estimation problem is presented by combining a grid-voltage estimator with an interfacing parameter estimator in a parallel structure. Both estimators adjust the grid-interfacing model in a manner that minimizes the current error between the grid model and the actual current dynamics, which acts as a reference model. The estimated quantities are utilized within the inner high-bandwidth current control loop and the outer power controller to realize an adaptive grid-voltage sensorless interfacing scheme. Theoretical analysis and simulation results are provided to demonstrate the validity and usefulness of the proposed interfacing scheme. Note de contenu : Bibiogr. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5075661&sortType%3Das [...]

A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems / Mohamed, Y.A.-R.I. in IEEE transactions on energy conversion, Vol. 23 N°1 (Mars 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 92 - 100 Titre : A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems Type de document : texte imprimé Auteurs : Mohamed, Y.A.-R.I., Auteur ; El-Saadany, E. F., Auteur Année de publication : 2008 Article en page(s) : pp. 92 - 100 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Lyapunov  methods;  closed  loop  systems;  electric  current  control;  machine  control;  permanent  magnet  motors;  robust  control;  synchronous  motor  drives;  torque  control Résumé : This paper addresses the problem of uncertainties in practical permanent magnet synchronous motors (PMSMs), and proposes a simple adaptive internal model within the current feedback and reference current generation structure as a solution. Due to the time varying nature and the high-bandwidth property of uncertainties in a practical PMSM drive system, the internal model is simply chosen as the estimated uncertainty function. To provide a high bandwidth estimate of the uncertainty function with high-noise immunity, a simple adaptation law is derived, in the sense of Lyapunov functions, using the nominal current dynamics. The inclusion of the frequency modes of the disturbances to be eliminated (the flux harmonics and voltage disturbances caused by parameter variation) in the stable closed-loop system introduces very high-attenuation at different frequency modes corresponding to uncertainty modes. Therefore, a robust torque ripple minimization and current regulation performances are yielded. To properly tune the proposed scheme, a stability analysis based on a discrete-time Lyapunov function has been used to determine the stability limits of the adaptation gain. Comparative evaluation results are presented to demonstrate the effectiveness of the proposed control scheme under different operating conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453985&sortType%3Das [...] [article] A current control scheme with an adaptive internal model for torque ripple minimization and robust current regulation in PMSM drive systems [texte imprimé] / Mohamed, Y.A.-R.I., Auteur ; El-Saadany, E. F., Auteur . - 2008 . - pp. 92 - 100. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 N°1 (Mars 2008) . - pp. 92 - 100 Mots-clés : Lyapunov  methods;  closed  loop  systems;  electric  current  control;  machine  control;  permanent  magnet  motors;  robust  control;  synchronous  motor  drives;  torque  control Résumé : This paper addresses the problem of uncertainties in practical permanent magnet synchronous motors (PMSMs), and proposes a simple adaptive internal model within the current feedback and reference current generation structure as a solution. Due to the time varying nature and the high-bandwidth property of uncertainties in a practical PMSM drive system, the internal model is simply chosen as the estimated uncertainty function. To provide a high bandwidth estimate of the uncertainty function with high-noise immunity, a simple adaptation law is derived, in the sense of Lyapunov functions, using the nominal current dynamics. The inclusion of the frequency modes of the disturbances to be eliminated (the flux harmonics and voltage disturbances caused by parameter variation) in the stable closed-loop system introduces very high-attenuation at different frequency modes corresponding to uncertainty modes. Therefore, a robust torque ripple minimization and current regulation performances are yielded. To properly tune the proposed scheme, a stability analysis based on a discrete-time Lyapunov function has been used to determine the stability limits of the adaptation gain. Comparative evaluation results are presented to demonstrate the effectiveness of the proposed control scheme under different operating conditions. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4453985&sortType%3Das [...]