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PWM method to eliminate power sources in a nonredundant 27-level inverter for machine drive applications / Rotella, M. in IEEE transactions on industrial electronics, Vol. 56 N°1 (Janvier 2009) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 56 N°1 (Janvier 2009) . - pp. 194 - 201 Titre : PWM method to eliminate power sources in a nonredundant 27-level inverter for machine drive applications Type de document : texte imprimé Auteurs : Rotella, M., Auteur ; Penailillo, G., Auteur ; Pereda, J., Auteur Année de publication : 2009 Article en page(s) : pp. 194 - 201 Note générale : electronics Langues : Anglais (eng) Mots-clés : PWM  power  convertors;  digital  signal  processing  chips;  electric  drives;  electric  machines Résumé : A nonredundant three-stage 27-level inverter using ldquoHrdquo converters is analyzed for medium- and high-power machine drive applications. The main advantage of this converter is the optimization of levels with a minimum number of semiconductors. However, the system needs six bidirectional and isolated power supplies and three more unidirectional if the machine is not using regenerative braking. In this paper, these nine power supplies are reduced to only four, all of them unidirectional, using three strategies: 1) the utilization of independent and isolated windings for each phase of the motor; 2) the utilization of independent input transformers; and 3) the most important of them, the application of special pulsewidth modulation (PWM) strategies on the 27-level converter, to keep positive average power at the medium power bridges and zero average power at the low-power bridges. The generation of this PWM and control of this multiconverter was implemented using DSP controllers, which give flexibility to the system. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4735595&sortType%3Das [...] [article] PWM method to eliminate power sources in a nonredundant 27-level inverter for machine drive applications [texte imprimé] / Rotella, M., Auteur ; Penailillo, G., Auteur ; Pereda, J., Auteur . - 2009 . - pp. 194 - 201. electronics Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N°1 (Janvier 2009) . - pp. 194 - 201 Mots-clés : PWM  power  convertors;  digital  signal  processing  chips;  electric  drives;  electric  machines Résumé : A nonredundant three-stage 27-level inverter using ldquoHrdquo converters is analyzed for medium- and high-power machine drive applications. The main advantage of this converter is the optimization of levels with a minimum number of semiconductors. However, the system needs six bidirectional and isolated power supplies and three more unidirectional if the machine is not using regenerative braking. In this paper, these nine power supplies are reduced to only four, all of them unidirectional, using three strategies: 1) the utilization of independent and isolated windings for each phase of the motor; 2) the utilization of independent input transformers; and 3) the most important of them, the application of special pulsewidth modulation (PWM) strategies on the 27-level converter, to keep positive average power at the medium power bridges and zero average power at the low-power bridges. The generation of this PWM and control of this multiconverter was implemented using DSP controllers, which give flexibility to the system. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4735595&sortType%3Das [...]