Elimination of subharmonic oscillation of digital-average-current-controlled switching DC–DC converters / Zhou, Guohua in IEEE transactions on industrial electronics, Vol. 57 N° 8 (Août 2010)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2904 - 2907 Titre : Elimination of subharmonic oscillation of digital-average-current-controlled switching DC–DC converters Type de document : texte imprimé Auteurs : Zhou, Guohua, Auteur ; Xu, Jianping, Auteur ; Yanyan, Jin, Auteur Année de publication : 2011 Article en page(s) : pp. 2904 - 2907 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Digital-average-current (DAC) control Digital triangle compensation (DTC) Switching dc-dc converters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Subharmonic oscillations exist in digital-average-current-controlled switching dc-dc converters with trailing- and leading-edge modulations. To eliminate these subharmonic oscillations, a digital-triangle-compensation (DTC) method is proposed in this letter. The DTC method can easily be implemented in digital way without an extra compensation circuit. Experimental results are given to verify the analysis results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332294 [article] Elimination of subharmonic oscillation of digital-average-current-controlled switching DC–DC converters [texte imprimé] / Zhou, Guohua, Auteur ; Xu, Jianping, Auteur ; Yanyan, Jin, Auteur . - 2011 . - pp. 2904 - 2907. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 8 (Août 2010) . - pp. 2904 - 2907 Mots-clés : Digital-average-current (DAC) control Digital triangle compensation (DTC) Switching dc-dc converters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Subharmonic oscillations exist in digital-average-current-controlled switching dc-dc converters with trailing- and leading-edge modulations. To eliminate these subharmonic oscillations, a digital-triangle-compensation (DTC) method is proposed in this letter. The DTC method can easily be implemented in digital way without an extra compensation circuit. Experimental results are given to verify the analysis results. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5332294

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Improved digital peak voltage predictive control for switching DC–DC converters / Xu, Jianping in IEEE transactions on industrial electronics, Vol. 56 N° 8 (Août 2009)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 56 N° 8 (Août 2009) . - pp. 3222 - 3229 Titre : Improved digital peak voltage predictive control for switching DC–DC converters Type de document : texte imprimé Auteurs : Xu, Jianping, Auteur ; Zhou, Guohua, Auteur ; He, Mingzhi, Auteur Article en page(s) : pp. 3222 - 3229 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Digital control slope compensation (DSC) Peak voltage Predictive Switching dc-dc converters V² Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A digital peak voltage (DPV) predictive control for switching dc-dc converters is proposed and studied in this paper. With the predictive control technique, the duty ratio in each switching cycle is usually calculated and predicted based on the status in the previous switching cycles. Therefore, at least a one-switching-cycle time delay usually exists in predictivPe control, which significantly degrades the control performance of digital controlled switching dc-dc converters. To eliminate this time delay and to improve the control performance, an improved DPV (IDPV) predictive control technique is then proposed and studied. The control laws of DPV and IDPV with different pulsewidth modulations are derived, and their stabilities are analyzed. A simple digital slope compensation method is proposed to eliminate the subharmonic oscillation of DPV and IDPV control laws. The steady-state and transient performances of DPV and IDPV controlled buck converters are investigated by simulation and experiment. The comparison studies among DPV, IDPV, and digital peak current (DPC) control show that the transient performances of IDPV and DPV are much better than that of DPC and that IDPV is better than DPV. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926160 [article] Improved digital peak voltage predictive control for switching DC–DC converters [texte imprimé] / Xu, Jianping, Auteur ; Zhou, Guohua, Auteur ; He, Mingzhi, Auteur . - pp. 3222 - 3229. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 8 (Août 2009) . - pp. 3222 - 3229 Mots-clés : Digital control slope compensation (DSC) Peak voltage Predictive Switching dc-dc converters V² Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : A digital peak voltage (DPV) predictive control for switching dc-dc converters is proposed and studied in this paper. With the predictive control technique, the duty ratio in each switching cycle is usually calculated and predicted based on the status in the previous switching cycles. Therefore, at least a one-switching-cycle time delay usually exists in predictivPe control, which significantly degrades the control performance of digital controlled switching dc-dc converters. To eliminate this time delay and to improve the control performance, an improved DPV (IDPV) predictive control technique is then proposed and studied. The control laws of DPV and IDPV with different pulsewidth modulations are derived, and their stabilities are analyzed. A simple digital slope compensation method is proposed to eliminate the subharmonic oscillation of DPV and IDPV control laws. The steady-state and transient performances of DPV and IDPV controlled buck converters are investigated by simulation and experiment. The comparison studies among DPV, IDPV, and digital peak current (DPC) control show that the transient performances of IDPV and DPV are much better than that of DPC and that IDPV is better than DPV. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4926160

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Multiduty ratio modulation technique for switching DC–DC converters operating in discontinuous conduction mode / Ming, Qin in IEEE transactions on industrial electronics, Vol. 57 N° 10 (Octobre 2010)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 57 N° 10 (Octobre 2010) . - pp. 3497 - 3507 Titre : Multiduty ratio modulation technique for switching DC–DC converters operating in discontinuous conduction mode Type de document : texte imprimé Auteurs : Ming, Qin, Auteur ; Xu, Jianping, Auteur Année de publication : 2011 Article en page(s) : pp. 3497 - 3507 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Buck converter Discontinuous conduction mode (DCM) Modulation technique Multiduty ratio (MDR) Switching dc-dc converters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Multiduty ratio (MDR) modulation, a novel modulation technique for switching dc-dc converters, is proposed and studied in this paper. MDR modulation technique achieves output voltage regulation by generating a control pulse train made up of control pulses with different duty ratios. MDR control needs only comparators, triggers, and some simple logic devices without an error amplifier and its corresponding compensation circuit; thus, the MDR modulation scheme is easy to realize, benefits with great robustness, and offers great transient performance. The principle and the operation of the MDR modulation scheme are introduced; simulation and experimental results are presented to show that an MDR-controlled converter has much better transient performance than a traditional pulsewidth modulation converter and has much lower output voltage ripple than a pulse-regulation converter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5371887 [article] Multiduty ratio modulation technique for switching DC–DC converters operating in discontinuous conduction mode [texte imprimé] / Ming, Qin, Auteur ; Xu, Jianping, Auteur . - 2011 . - pp. 3497 - 3507. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 10 (Octobre 2010) . - pp. 3497 - 3507 Mots-clés : Buck converter Discontinuous conduction mode (DCM) Modulation technique Multiduty ratio (MDR) Switching dc-dc converters Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : Multiduty ratio (MDR) modulation, a novel modulation technique for switching dc-dc converters, is proposed and studied in this paper. MDR modulation technique achieves output voltage regulation by generating a control pulse train made up of control pulses with different duty ratios. MDR control needs only comparators, triggers, and some simple logic devices without an error amplifier and its corresponding compensation circuit; thus, the MDR modulation scheme is easy to realize, benefits with great robustness, and offers great transient performance. The principle and the operation of the MDR modulation scheme are introduced; simulation and experimental results are presented to show that an MDR-controlled converter has much better transient performance than a traditional pulsewidth modulation converter and has much lower output voltage ripple than a pulse-regulation converter. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5371887

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