Documents disponibles écrits par cet auteur

Flying-capacitor-based chopper circuit for DC capacitor voltage balancing in diode-clamped multilevel inverter / Shukla, Anshuman in IEEE transactions on industrial electronics, Vol. 57 N° 7 (Juillet 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2249 - 2261 Titre : Flying-capacitor-based chopper circuit for DC capacitor voltage balancing in diode-clamped multilevel inverter Type de document : texte imprimé Auteurs : Shukla, Anshuman, Auteur ; Ghosh, Arindam, Auteur ; Joshi, Avinash, Auteur Article en page(s) : pp. 2249 - 2261 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Chopper  Diode-clamped  multilevel  inverter  (DCMLI)  Flying  capacitor  Four-level  Multilevel  Three-level Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper proposes a flying-capacitor-based chopper circuit for dc capacitor voltage equalization in diode-clamped multilevel inverters. Its important features are reduced voltage stress across the chopper switches, possible reduction in the chopper switching frequency, improved reliability, and ride-through capability enhancement. This topology is analyzed using three- and four-level flying-capacitor-based chopper circuit configurations. These configurations are different in capacitor and semiconductor device count and correspondingly reduce the device voltage stresses by half and one-third, respectively. The detailed working principles and control schemes for these circuits are presented. It is shown that, by preferentially selecting the available chopper switch states, the dc-link capacitor voltages can be efficiently equalized in addition to having tightly regulated flying-capacitor voltages around their references. The various operating modes of the chopper are described along with their preferential selection logic to achieve the desired performances. The performance of the proposed chopper and corresponding control schemes are confirmed through both simulation and experimental investigations. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210147 [article] Flying-capacitor-based chopper circuit for DC capacitor voltage balancing in diode-clamped multilevel inverter [texte imprimé] / Shukla, Anshuman, Auteur ; Ghosh, Arindam, Auteur ; Joshi, Avinash, Auteur . - pp. 2249 - 2261. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2249 - 2261 Mots-clés : Chopper  Diode-clamped  multilevel  inverter  (DCMLI)  Flying  capacitor  Four-level  Multilevel  Three-level Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper proposes a flying-capacitor-based chopper circuit for dc capacitor voltage equalization in diode-clamped multilevel inverters. Its important features are reduced voltage stress across the chopper switches, possible reduction in the chopper switching frequency, improved reliability, and ride-through capability enhancement. This topology is analyzed using three- and four-level flying-capacitor-based chopper circuit configurations. These configurations are different in capacitor and semiconductor device count and correspondingly reduce the device voltage stresses by half and one-third, respectively. The detailed working principles and control schemes for these circuits are presented. It is shown that, by preferentially selecting the available chopper switch states, the dc-link capacitor voltages can be efficiently equalized in addition to having tightly regulated flying-capacitor voltages around their references. The various operating modes of the chopper are described along with their preferential selection logic to achieve the desired performances. The performance of the proposed chopper and corresponding control schemes are confirmed through both simulation and experimental investigations. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5210147

Multiband hysteresis modulation and switching characterization for sliding-mode-controlled cascaded multilevel inverter / Gupta, Rajesh in IEEE transactions on industrial electronics, Vol. 57 N° 7 (Juillet 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2344 - 2353 Titre : Multiband hysteresis modulation and switching characterization for sliding-mode-controlled cascaded multilevel inverter Type de document : texte imprimé Auteurs : Gupta, Rajesh, Auteur ; Ghosh, Arindam, Auteur ; Joshi, Avinash, Auteur Article en page(s) : pp. 2344 - 2353 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Cascaded  H-bridge  multilevel  inverter  (CHBMLI)  Ddistribution  static  compensator  (DSTATCOM)  Multiband  hysteresis  modulation  Switching  characterization Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a generalized multiband hysteresis modulation and its characterization have been proposed for the sliding-mode control of cascaded H-bridge multilevel-inverter (CHBMLI)-controlled systems. A frequency-domain method is proposed for the determination of net hysteresis bandwidth for a given desired maximum switching frequency of the inverter. The switching transition concept of Tsypkin's method and the describing function of nonlinear relay have been used for the derivation of results. A hierarchical switching algorithm has been suggested for the modular cells of the cascaded multilevel inverter. The hierarchy of each cell is swapped sequentially to provide the self-balancing capability in case the dc-link voltage is supported by the capacitors. The simulation and experimental verification of the derived results are provided through a single-phase distribution static compensator (DSTATCOM) model. The application in the three-phase system has been shown through simulation studies on a 3.3-kV distribution-system compensation using DSTATCOM. Verification on both single- and three-phase systems is obtained using a five-level cascaded-multilevel-inverter topology. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226573 [article] Multiband hysteresis modulation and switching characterization for sliding-mode-controlled cascaded multilevel inverter [texte imprimé] / Gupta, Rajesh, Auteur ; Ghosh, Arindam, Auteur ; Joshi, Avinash, Auteur . - pp. 2344 - 2353. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2344 - 2353 Mots-clés : Cascaded  H-bridge  multilevel  inverter  (CHBMLI)  Ddistribution  static  compensator  (DSTATCOM)  Multiband  hysteresis  modulation  Switching  characterization Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : In this paper, a generalized multiband hysteresis modulation and its characterization have been proposed for the sliding-mode control of cascaded H-bridge multilevel-inverter (CHBMLI)-controlled systems. A frequency-domain method is proposed for the determination of net hysteresis bandwidth for a given desired maximum switching frequency of the inverter. The switching transition concept of Tsypkin's method and the describing function of nonlinear relay have been used for the derivation of results. A hierarchical switching algorithm has been suggested for the modular cells of the cascaded multilevel inverter. The hierarchy of each cell is swapped sequentially to provide the self-balancing capability in case the dc-link voltage is supported by the capacitors. The simulation and experimental verification of the derived results are provided through a single-phase distribution static compensator (DSTATCOM) model. The application in the three-phase system has been shown through simulation studies on a 3.3-kV distribution-system compensation using DSTATCOM. Verification on both single- and three-phase systems is obtained using a five-level cascaded-multilevel-inverter topology. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5226573