[article]
| Titre : |
A general PWM method for a (2n + 1) -leg inverter supplying n three-phase machines |
| Type de document : |
texte imprimé |
| Auteurs : |
Dujic, Drazen, Auteur ; Jones, Martin, Auteur ; Vukosavic, Slobodan N., Auteur |
| Article en page(s) : |
pp. 4107 - 4118 |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Multimachine drive systems Pulsewidth modulation (PWM) Reduced switch-count topologies Vector control V/f |
| Index. décimale : |
621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X |
| Résumé : |
Control of an ac machine requires only two currents. It is, therefore, possible to achieve independent control of a number of three-phase machines using various inverter topologies with a reduced switch count. One such drive system comprises n three-phase induction machines supplied by a (2n + 1)-leg voltage source inverter (VSI). In such a configuration, one inverter leg is common for all machines. This paper presents a general pulsewidth modulation (PWM) method that is applicable for any number of machines n in the group. It is based on utilization of the standard three-phase modulators in conjunction with additional logic to generate modulation signals for all (2n + 1) legs of the inverter, and it enables an arbitrary distribution of the available dc bus voltage between the n machines. A developed PWM method has been implemented and tested in two-machine, three-machine, and four-machine drives, supplied from five-leg, seven-leg, and nine-leg VSIs, respectively. Experimental results are reported for open-loop V/f control, closed-loop current-controlled V/f mode of operation, and full vector control. It is shown that the nonideal nature of the VSI causes unsatisfactory operation of the drive system in the open-loop V/f mode, and that closed-loop current control is, therefore, preferred in this type of a drive system. It is believed that the four-machine drive has a good potential for industrial applications since, in certain cases, it enables a considerable saving in the required number of switches and installed inverter power. |
| DEWEY : |
621.38 |
| ISSN : |
0278-0046 |
| En ligne : |
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4785131 |
in IEEE transactions on industrial electronics > Vol. 56 N° 10 (Octobre 2009) . - pp. 4107 - 4118
[article] A general PWM method for a (2n + 1) -leg inverter supplying n three-phase machines [texte imprimé] / Dujic, Drazen, Auteur ; Jones, Martin, Auteur ; Vukosavic, Slobodan N., Auteur . - pp. 4107 - 4118. Langues : Anglais ( eng) in IEEE transactions on industrial electronics > Vol. 56 N° 10 (Octobre 2009) . - pp. 4107 - 4118
| Mots-clés : |
Multimachine drive systems Pulsewidth modulation (PWM) Reduced switch-count topologies Vector control V/f |
| Index. décimale : |
621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X |
| Résumé : |
Control of an ac machine requires only two currents. It is, therefore, possible to achieve independent control of a number of three-phase machines using various inverter topologies with a reduced switch count. One such drive system comprises n three-phase induction machines supplied by a (2n + 1)-leg voltage source inverter (VSI). In such a configuration, one inverter leg is common for all machines. This paper presents a general pulsewidth modulation (PWM) method that is applicable for any number of machines n in the group. It is based on utilization of the standard three-phase modulators in conjunction with additional logic to generate modulation signals for all (2n + 1) legs of the inverter, and it enables an arbitrary distribution of the available dc bus voltage between the n machines. A developed PWM method has been implemented and tested in two-machine, three-machine, and four-machine drives, supplied from five-leg, seven-leg, and nine-leg VSIs, respectively. Experimental results are reported for open-loop V/f control, closed-loop current-controlled V/f mode of operation, and full vector control. It is shown that the nonideal nature of the VSI causes unsatisfactory operation of the drive system in the open-loop V/f mode, and that closed-loop current control is, therefore, preferred in this type of a drive system. It is believed that the four-machine drive has a good potential for industrial applications since, in certain cases, it enables a considerable saving in the required number of switches and installed inverter power. |
| DEWEY : |
621.38 |
| ISSN : |
0278-0046 |
| En ligne : |
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4785131 |
|
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