Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/595646
Title: Analytical Expression for Discharge Process of Multiphase Air-Core Pulsed Alternators
Authors: Shaofei Wang;Shaopeng Wu;Shumei Cui
subject: railguns|Pulsed alternator|short-circuit current
Year: 2016
Publisher: IEEE
Abstract: Multiphase pulsed alternators use a thyristor converter to generate the direct current to power railguns. The desired current shape can be obtained by adjusting firing angles of thyristor. The discharge process of multiphase pulsed alternators is complicated due to a special air-core topology and the interactions between multiple current pulses, so the appropriate selection of firing angles only is obtained using a cut and try method within a system simulator. To quickly get the appropriate firing angle, this paper analyzes the discharge process of multiphase pulsed alternators. The calculations of the short-circuit current and transient parameters are obtained based on the classical theory of short circuit. Two types of interactions among multiple current pulses are revealed by theoretical deduction. A formula of peak current, relating to firing angles, is obtained. A finite-element method is used to verify the theoretical analysis. The results of those two methods are close and errors are acceptable. Therefore, the analysis of discharge process is valid. The analytical expression of discharge process can provide the theoretical guides for the selection of firing angles and current waveform control in the future.
URI: http://localhost/handle/Hannan/176400
http://localhost/handle/Hannan/595646
ISSN: 0093-3813
1939-9375
volume: 44
issue: 12
Appears in Collections:2016

Files in This Item:
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Title: Analytical Expression for Discharge Process of Multiphase Air-Core Pulsed Alternators
Authors: Shaofei Wang;Shaopeng Wu;Shumei Cui
subject: railguns|Pulsed alternator|short-circuit current
Year: 2016
Publisher: IEEE
Abstract: Multiphase pulsed alternators use a thyristor converter to generate the direct current to power railguns. The desired current shape can be obtained by adjusting firing angles of thyristor. The discharge process of multiphase pulsed alternators is complicated due to a special air-core topology and the interactions between multiple current pulses, so the appropriate selection of firing angles only is obtained using a cut and try method within a system simulator. To quickly get the appropriate firing angle, this paper analyzes the discharge process of multiphase pulsed alternators. The calculations of the short-circuit current and transient parameters are obtained based on the classical theory of short circuit. Two types of interactions among multiple current pulses are revealed by theoretical deduction. A formula of peak current, relating to firing angles, is obtained. A finite-element method is used to verify the theoretical analysis. The results of those two methods are close and errors are acceptable. Therefore, the analysis of discharge process is valid. The analytical expression of discharge process can provide the theoretical guides for the selection of firing angles and current waveform control in the future.
URI: http://localhost/handle/Hannan/176400
http://localhost/handle/Hannan/595646
ISSN: 0093-3813
1939-9375
volume: 44
issue: 12
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7752912.pdf2.2 MBAdobe PDFThumbnail
Preview File
Title: Analytical Expression for Discharge Process of Multiphase Air-Core Pulsed Alternators
Authors: Shaofei Wang;Shaopeng Wu;Shumei Cui
subject: railguns|Pulsed alternator|short-circuit current
Year: 2016
Publisher: IEEE
Abstract: Multiphase pulsed alternators use a thyristor converter to generate the direct current to power railguns. The desired current shape can be obtained by adjusting firing angles of thyristor. The discharge process of multiphase pulsed alternators is complicated due to a special air-core topology and the interactions between multiple current pulses, so the appropriate selection of firing angles only is obtained using a cut and try method within a system simulator. To quickly get the appropriate firing angle, this paper analyzes the discharge process of multiphase pulsed alternators. The calculations of the short-circuit current and transient parameters are obtained based on the classical theory of short circuit. Two types of interactions among multiple current pulses are revealed by theoretical deduction. A formula of peak current, relating to firing angles, is obtained. A finite-element method is used to verify the theoretical analysis. The results of those two methods are close and errors are acceptable. Therefore, the analysis of discharge process is valid. The analytical expression of discharge process can provide the theoretical guides for the selection of firing angles and current waveform control in the future.
URI: http://localhost/handle/Hannan/176400
http://localhost/handle/Hannan/595646
ISSN: 0093-3813
1939-9375
volume: 44
issue: 12
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7752912.pdf2.2 MBAdobe PDFThumbnail
Preview File